Thomas David Siopes

Works (61)

Updated: April 4th, 2024 18:02

2014 article

Overcompensation of circulating and local insulin-like growth factor-1 during catch-up growth in hybrid striped bass ( Morone chrysops × Morone saxatilis ) following temperature and feeding manipulations

Picha, M. E., Biga, P. R., Galt, N., McGinty, A. S., Gross, K., Hedgpeth, V. S., … Borski, R. J. (2014, March 1). Aquaculture, Vol. 428, pp. 174–183.

By: M. Picha n, P. Biga *, N. Galt *, A. McGinty n, K. Gross n, V. Hedgpeth n, T. Siopes n, R. Borski n 

author keywords: Hybrid striped bass; Compensatory growth; Catch-up growth; Insulin-like growth factor; Growth hormone receptor; Myostatin
topics (OpenAlex): Aquaculture Nutrition and Growth; Physiological and biochemical adaptations; Fish Ecology and Management Studies
TL;DR: It is demonstrated that a previous period of feed restriction and cold-acclimation followed by realimentation at more favorable water temperatures produces a strong CG response and catch-up growth in fish. (via Semantic Scholar)
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14. Life Below Water (Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2013 article

Tuberal hypothalamic expression of the glial intermediate filaments, glial fibrillary acidic protein and vimentin across the turkey hen (Meleagris gallopavo) reproductive cycle: Further evidence for a role of glial structural plasticity in seasonal reproduction

Steinman, M. Q., Valenzuela, A. E., Siopes, T. D., & Millam, J. R. (2013, August 13). General and Comparative Endocrinology.

By: M. Steinman*, A. Valenzuela *, T. Siopes n & J. Millam*

author keywords: Meleagris gallopavo; GnRH; Glia; GFAP; Vimentin; Photoperiod
MeSH headings : Animals; Breeding; Female; Glial Fibrillary Acidic Protein / genetics; Glial Fibrillary Acidic Protein / metabolism; Hypothalamus / metabolism; Male; Photoperiod; Reproduction / genetics; Reproduction / physiology; Seasons; Turkeys / genetics; Turkeys / metabolism; Turkeys / physiology; Vimentin / metabolism
topics (OpenAlex): Hypothalamic control of reproductive hormones; Animal Nutrition and Physiology; Sperm and Testicular Function
TL;DR: It appears that up-regulation of GFAP expression in the central median eminence of turkey hens is associated with periods of reproductive quiescence and that photofractoriness isassociated with the lack of a glial cytoskeletal response to long days. (via Semantic Scholar)
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Source: Web Of Science
Added: August 6, 2018

2010 article

Initiating egg production in turkey breeder hens: Thyroid hormone involvement

Siopes, T. D., Millam, J. R., & Steinman, M. Q. (2010, September 17). Poultry Science.

By: T. Siopes n, J. Millam* & M. Steinman*

author keywords: photoperiod; photorefractoriness; turkey; egg production; sexual maturation
MeSH headings : Aging; Animals; Antithyroid Agents / pharmacology; Female; Oviposition / drug effects; Oviposition / physiology; Propylthiouracil / pharmacology; Sexual Maturation / physiology; Thyroid Hormones / metabolism; Turkeys / physiology
topics (OpenAlex): Animal Behavior and Reproduction; Animal Vocal Communication and Behavior; Animal Nutrition and Physiology
TL;DR: Results demonstrate that a period of pharmacological suppression of triiodothyronine and thyroxine can substitute for short day exposure in conferring photosensitivity on juvenile-aged turkeys (and is actually superior to short day Exposure), and suggest that there is ample physiological potential to substantially advance the age of photoinduced egg production in commercial flocks. (via Semantic Scholar)
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15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2010 article

Initiation of egg production by turkey breeder hens: Sexual maturation and age at lighting

Siopes, T. D. (2010, June 14). Poultry Science.

By: T. Siopes n

author keywords: photoperiod; photorefractoriness; photostimulation; turkey; sexual maturation
MeSH headings : Animal Husbandry / methods; Animals; Female; Least-Squares Analysis; Oviposition / physiology; Ovum / physiology; Photoperiod; Seasons; Sexual Maturation / physiology; Turkeys / physiology
topics (OpenAlex): Animal Nutrition and Physiology; Livestock and Poultry Management; Silkworms and Sericulture Research
TL;DR: It is demonstrated that the conventional age at lighting of 29 to 30 wk of age can be significantly advanced and Appropriate pre-lay short day exposure is required to fully photosensitize juvenile hens for photoinduced egg production and this requires a development time beyond 16 wK of age. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2008 article

Diurnal variation in the cellular and humoral immune responses of Japanese quail: Role of melatonin

Siopes, T. D., & Underwood, H. A. (2008, August 6). General and Comparative Endocrinology.

By: T. Siopes n & H. Underwood n

author keywords: diurnal; immune response; melatonin; birds; pineal
MeSH headings : Animals; Antibody Formation / drug effects; Antibody Formation / physiology; Circadian Rhythm / physiology; Coturnix / immunology; Coturnix / metabolism; Immunity, Cellular / drug effects; Immunity, Cellular / physiology; Male; Melatonin / metabolism; Melatonin / pharmacology; Melatonin / physiology; Pineal Gland / drug effects; Pineal Gland / metabolism
topics (OpenAlex): Circadian rhythm and melatonin; Animal Nutrition and Physiology; Animal Behavior and Reproduction
TL;DR: There exists a melatonin dependent diurnal variation in both cellular and humoral immune responses of quail that is inverse to one another during the daily light-dark cycle. (via Semantic Scholar)
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Source: Web Of Science
Added: August 6, 2018

2008 article

Exposure duration to long day lengths associated with the expression of photorefractoriness in turkey breeder hens

Siopes, T. D., & Proudman, J. A. (2008, December 19). Poultry Science.

By: T. Siopes n & J. Proudman*

author keywords: photoperiod; photorefractoriness; turkey; egg production; season
MeSH headings : Animals; Female; Oviposition / physiology; Photoperiod; Time Factors; Turkeys / metabolism
topics (OpenAlex): Animal Nutrition and Physiology; Plant and animal studies; Animal Behavior and Reproduction
TL;DR: It was concluded that programming of PR during late spring-summer season occurs after 9 wK of long day exposure, is not fully expressed by 12 wk of long days, and can be fully express by 20 wkOf photostimulation. (via Semantic Scholar)
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Source: Web Of Science
Added: August 6, 2018

2008 article

Photostimulated Expression of Type 2 Iodothyronine Deiodinase mRNA is Greatly Attenuated in the Rostral Tuberal Hypothalamus of the Photorefractory Turkey Hen

Steinman, M. Q., Dinius, S. C., Siopes, T. D., & Millam, J. R. (2008, August 22). Journal of Neuroendocrinology.

By: M. Steinman*, S. Dinius*, T. Siopes n & J. Millam*

MeSH headings : Animals; Circadian Rhythm / physiology; Female; Glial Fibrillary Acidic Protein / genetics; Glial Fibrillary Acidic Protein / metabolism; Hypothalamus / cytology; Hypothalamus / enzymology; In Situ Hybridization; Iodide Peroxidase / genetics; Iodide Peroxidase / metabolism; Light; Photoperiod; Proto-Oncogene Proteins c-fos / genetics; Proto-Oncogene Proteins c-fos / metabolism; RNA, Messenger / metabolism; Turkeys / anatomy & histology; Turkeys / metabolism
topics (OpenAlex): Circadian rhythm and melatonin; Animal Behavior and Reproduction; Neurobiology and Insect Physiology Research
TL;DR: The temporal and spatial coincidence between FRA and Dio2 expression, their mutual association with glia, and the attenuation of their response during photorefractoriness suggests that the two events are linked and that photoreFractoriness involves a reduced capacity for photo‐inducible gene expression within glia of the tuberal hypothalamus. (via Semantic Scholar)
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14. Life Below Water (OpenAlex)
15. Life on Land (Web of Science)
Source: NC State University Libraries
Added: August 6, 2018

2007 article

Lighting for Summer Egg Production by Turkeys: Day Length and Light Intensity

Siopes, T. D. (2007, November 1). Poultry Science.

By: T. Siopes n

author keywords: photoperiod; light intensity; turkey; egg production; photorefractoriness; egg weight; thyroid hormone
MeSH headings : Animal Husbandry; Animal Welfare; Animals; Body Weight; Feeding Behavior; Female; Housing, Animal; Light; Oviposition / physiology; Oviposition / radiation effects; Photoperiod; Seasons; Thyroid Hormones / blood; Turkeys / physiology
topics (OpenAlex): Animal Nutrition and Physiology; Livestock and Poultry Management; Plant and animal studies
TL;DR: By increasing photoperiodic drive by increased day length, but not light intensity, there results an improved summer egg production by turkeys and reduced incidence of photorefractoriness. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2006 article

Potential Role of Thyroid Hormones and Prolactin in the Programming of Photorefractoriness in Turkey Hens

Proudman, J. A., & Siopes, T. D. (2006, August 1). Poultry Science.

By: J. Proudman* & T. Siopes n

author keywords: turkey; photorefractoriness; prolactin; thyroid hormone
MeSH headings : Animals; Female; Oviposition / physiology; Photoperiod; Prolactin / blood; Prolactin / physiology; Seasons; Thyroid Hormones / blood; Thyroid Hormones / physiology; Thyroxine / blood; Thyroxine / physiology; Time Factors; Triiodothyronine / blood; Triiodothyronine / physiology; Turkeys / blood; Turkeys / physiology
topics (OpenAlex): Animal Behavior and Reproduction; Plant and animal studies; Animal Vocal Communication and Behavior
TL;DR: Thyroid hormone levels around the time of photostimulation either are not actively related to programming of subsequent PR in turkeys or programming for PR in the turkey hen occurs later in the reproductive cycle than in passerine birds. (via Semantic Scholar)
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15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2005 article

Enhancement of cellular and humoral immunity following embryonic exposure to melatonin in turkeys (Meleagris gallopavo)

Moore, C. B., & Siopes, T. D. (2005, April 29). General and Comparative Endocrinology.

By: C. Moore n & T. Siopes n

author keywords: melatonin; immune response; turkey poults; neonate; embryonic
MeSH headings : Age Factors; Animals; Animals, Newborn; Antibody Formation / physiology; Chi-Square Distribution; Dose-Response Relationship, Drug; Embryo, Nonmammalian / drug effects; Embryo, Nonmammalian / immunology; Female; Immunity, Cellular / physiology; Melatonin / administration & dosage; Melatonin / immunology; Ovum / drug effects; Ovum / metabolism; Random Allocation; Turkeys / growth & development; Turkeys / immunology
topics (OpenAlex): Circadian rhythm and melatonin; Animal Nutrition and Physiology; Cholesterol and Lipid Metabolism
TL;DR: Data suggest that embryonic exposure to melatonin enhances post-hatch immune development and responsiveness, and in ovo melatonin administration significantly accelerated the development of cell-mediated (PHA-P) and humoral (CRBC) immune responses. (via Semantic Scholar)
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2005 article

Spontaneous recovery of photosensitivity by turkey breeder hens given prolonged exposure to long day lengths

Siopes, T. D. (2005, September 1). Poultry Science.

By: T. Siopes n

author keywords: photosensitivity; turkeys; light; thyroid hormones; photorefractoriness
MeSH headings : Animals; Female; Oviposition / radiation effects; Ovum / growth & development; Photoperiod; Seasons; Thyroxine / blood; Time Factors; Triiodothyronine / blood; Turkeys / physiology
topics (OpenAlex): Animal Behavior and Reproduction; Animal Nutrition and Physiology; Plant and animal studies
TL;DR: For turkey hens maintained in prolonged and constant long day lengths that SP and renewal of egg production occurs in the fall season, which was independent of season of photostimulation and was preceded by a parabolic increase in plasma triiodothyronine. (via Semantic Scholar)
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15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2005 article

Thyroid hormone and prolactin profiles in male and female turkeys following photostimulation

Proudman, J. A., & Siopes, T. D. (2005, June 1). Poultry Science.

By: J. Proudman* & T. Siopes n

author keywords: prolactin; thyroxine; triiodothyronine; turkey; photorefractoriness
MeSH headings : Animals; Female; Male; Photic Stimulation; Prolactin / blood; Sex Characteristics; Thyroid Hormones / blood; Thyroxine / blood; Time Factors; Triiodothyronine / blood; Turkeys / blood
topics (OpenAlex): Animal Nutrition and Physiology; Animal Behavior and Reproduction; Bird parasitology and diseases
TL;DR: It is concluded that PRL profiles of toms and hens differ markedly during the reproductive cycle, lending support to the suggestion that rising PRL may mediate the onset of PR. (via Semantic Scholar)
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15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2005 article

Time keeping by the quail’s eye: Circadian regulation of melatonin production

Steele, C. T., Tosini, G., Siopes, T., & Underwood, H. (2005, November 9). General and Comparative Endocrinology.

By: C. Steele n, G. Tosini *, T. Siopes n & H. Underwood n

author keywords: circadian pacemaker; retina; Coturnix; serotonin
MeSH headings : 5-Hydroxytryptophan / pharmacology; Animals; Biological Clocks / physiology; Circadian Rhythm / physiology; Coturnix / physiology; Darkness; Eye / drug effects; Eye / metabolism; Eye / radiation effects; Light; Male; Melatonin / metabolism; Retina / drug effects; Retina / metabolism; Retina / radiation effects; Serotonin / pharmacology; Time Factors; Tissue Culture Techniques
topics (OpenAlex): Circadian rhythm and melatonin; Sleep and Wakefulness Research; Photoreceptor and optogenetics research
TL;DR: The results show definitively that the eyes are the loci of a biological clock and strengthen the hypothesis that the ocular clock is a circadian pacemaker that can affect the rest of the circadian system via the cyclic synthesis and release of melatonin. (via Semantic Scholar)
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Source: Web Of Science
Added: August 6, 2018

2004 article

Effect of a Single Short-Term Reduction in Photoperiod on Photorefractoriness in Turkey Hens

Proudman, J. A., & Siopes, T. D. (2004, July 1). Poultry Science.

By: J. Proudman* & T. Siopes n

author keywords: photoperiod; photorefractoriness; turkey
MeSH headings : Animals; Female; Light; Oviposition / radiation effects; Photoperiod; Reproduction / radiation effects; Seasons; Turkeys / physiology
topics (OpenAlex): Plant and animal studies; Antioxidant Activity and Oxidative Stress
TL;DR: It was concluded that a core proportion of hens exhibited a strong rPR response when presented with a reduced photoperiod early in the reproductive cycle, regardless of season of the year, and that such hens were more likely to subsequently exhibit poor egg production or become aPR than flockmates that did not exhibit rPR. (via Semantic Scholar)
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15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2004 journal article

Spontaneous ovarian adenocarcinoma in the domestic turkey breeder hen (Meleagris gallopavo): Effects of photoperiod and melatonin

Neuroendocrinology Letters, 25(02-Jan), 94–101.

By: C. Moore & T. Siopes

Source: NC State University Libraries
Added: August 6, 2018

2003 article

Immune function in turkey breeder hens during the short day prelighting period and renewal of photosensitivity for egg production

Moore, C. B., & Siopes, T. D. (2003, January 1). Poultry Science.

By: C. Moore n & T. Siopes n

author keywords: turkey; immune; recycle; photoperiod; photorefractory
MeSH headings : Animals; Antibody Formation / radiation effects; Basophils / immunology; Female; Light; Oviposition / radiation effects; Photoperiod; Phytohemagglutinins / immunology; Skin / immunology; Skin Tests; Turkeys / immunology; Turkeys / physiology
topics (OpenAlex): Animal Behavior and Reproduction; Animal Nutrition and Physiology; Avian ecology and behavior
TL;DR: It is concluded that recycling of PR turkey hens was associated with altered cellular and humoral immune responses characterized by initial decline then recovery in both the light restriction and the postphotostimulation periods. (via Semantic Scholar)
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2003 article

Melatonin enhances cellular and humoral immune responses in the Japanese quail (Coturnix coturnix japonica) via an opiatergic mechanism

Moore, C. B., & Siopes, T. D. (2003, April 25). General and Comparative Endocrinology.

By: C. Moore n & T. Siopes n

MeSH headings : Adjuvants, Immunologic / pharmacology; Animals; Antibody Formation / drug effects; Coturnix / immunology; Female; Immunity, Cellular / drug effects; Melatonin / pharmacology; Naltrexone / pharmacology; Narcotic Antagonists / pharmacology; Photoperiod; Receptors, Opioid / drug effects
topics (OpenAlex): Circadian rhythm and melatonin; Neuroendocrine regulation and behavior; Animal Nutrition and Physiology
TL;DR: Melatonin enhances a cellular and humoral immune response in Japanese quail via an opiatergic mechanism and significantly reduced the immunoenhancing effect of melatonin across all naltrexone doses. (via Semantic Scholar)
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6. Clean Water and Sanitation (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2003 article

Ocular clocks are tightly coupled and act as pacemakers in the circadian system of Japanese quail

Steele, C. T., Zivkovic, B. D., Siopes, T., & Underwood, H. (2003, January 1). American Journal of Physiology-Regulatory, Integrative and Comparative Physiology.

By: C. Steele n, B. Zivkovic n, T. Siopes* & H. Underwood*

author keywords: melatonin; body temperature; eye; circadian; Coturnix
MeSH headings : Animals; Biological Clocks / physiology; Body Temperature; Circadian Rhythm / physiology; Coturnix / physiology; Eye / chemistry; Female; Male; Melatonin / analysis; Melatonin / blood; Ocular Physiological Phenomena; Photoperiod
topics (OpenAlex): Circadian rhythm and melatonin; Photoreceptor and optogenetics research; Neurobiology and Insect Physiology Research
TL;DR: The ability to maintain phase in DD and rapidly recouple after out-of-phase entrainment demonstrates that the eyes are strongly coupled pacemakers that work in synchrony to drive circadian rhythmicity in Japanese quail. (via Semantic Scholar)
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Source: Web Of Science
Added: August 6, 2018

2003 article

Photoresponsiveness of turkey breeder hens changes during the egg-laying season: relative and absolute photorefractoriness

Siopes, T. D., & Proudman, J. A. (2003, June 1). Poultry Science.

By: T. Siopes n & J. Proudman n

author keywords: turkey; photorefractoriness; prolactin; photoresponsiveness; luteinizing hormone
MeSH headings : Animals; Female; Housing, Animal; Luteinizing Hormone / blood; Photobiology; Photoperiod; Prolactin / blood; Reproduction / physiology; Seasons; Turkeys / physiology
topics (OpenAlex): Animal Nutrition and Physiology; Antioxidant Activity and Oxidative Stress; Animal Behavior and Reproduction
TL;DR: It is concluded that turkey hens exhibit varying degrees of rPR early during the egg laying season and that the incidence and severity of the rPR response increases as the laying season progresses. (via Semantic Scholar)
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15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2003 article

Photostimulated fos-like immunoreactivity in tuberal hypothalamus of photosensitive vs. photorefractory turkey hens

Millam, J. R., Craig-Veit, C. B., & Siopes, T. D. (2003, September 3). General and Comparative Endocrinology.

By: J. Millam*, C. Craig-Veit* & T. Siopes n

author keywords: turkey; hypothalamus; c-Fos; photoperiod; photorefractoriness; cGnRH I; vasoactive intestinal polypeptide (VIP)
MeSH headings : Animals; Circadian Rhythm / physiology; Circadian Rhythm / radiation effects; Female; Hypothalamus / cytology; Hypothalamus / metabolism; Hypothalamus / radiation effects; Light; Neurons / metabolism; Neurons / radiation effects; Photoperiod; Proto-Oncogene Proteins c-fos / metabolism; Proto-Oncogene Proteins c-fos / radiation effects; Reproduction / physiology; Reproduction / radiation effects; Turkeys / physiology
topics (OpenAlex): Hypothalamic control of reproductive hormones; Neuroendocrine regulation and behavior; Animal Behavior and Reproduction
TL;DR: These results implicate neurons in the rostral tuberal hypothalamus as a potential neural locus of photorefractoriness, as FLI in this region appears coupled with cGnRH I activation in photostimulated-photosensitive but not photostIMulated-photorefractory turkey hens. (via Semantic Scholar)
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UN Sustainable Development Goal Categories
15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2002 article

Apposition of enkephalinergic axons with cGnRH I-containing perikarya in turkey hen brain

Millam, J. R., Wang, R., Craig-Veit, C. B., & Siopes, T. D. (2002, June 1). General and Comparative Endocrinology.

By: J. Millam*, R. Wang*, C. Craig-Veit* & T. Siopes n

author keywords: chicken gonadotropin-releasing hormone I (cGnRH I); met-enkephalin; leu-enkephalin; Turkey; gonadotropin regulation
MeSH headings : Animals; Axons / metabolism; Brain Chemistry / physiology; Coloring Agents; Enkephalins / metabolism; Female; Gonadotropin-Releasing Hormone / metabolism; Image Processing, Computer-Assisted; Immunohistochemistry; Microscopy, Confocal; Tissue Fixation; Turkeys / metabolism
topics (OpenAlex): Hypothalamic control of reproductive hormones; Neuropeptides and Animal Physiology; Neuroendocrine regulation and behavior
TL;DR: Multiple instances in which enkephalinergic neuronal elements appeared to contact cGnRH I perikarya and axons in and around the diagonal band of Broca, the bed nucleus of the pallial commissure and in the lateral septal nucleus appear to provide a neuroanatomic basis for how enkePHalinergic innervation might influence gonadotropin secretion in turkey hens by directly regulating activity of cGNRH I neurons. (via Semantic Scholar)
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2002 article

Circulating thyroid hormone levels in recycled turkey breeder hens during a short day prelighting period and renewal of photosensitivity for egg production

Siopes, T. D. (2002, September 1). Poultry Science.

By: T. Siopes n

author keywords: thyroid hormone; triiodothyronine; photorefractoriness; turkey; photoperiod
MeSH headings : Animals; Circadian Rhythm / physiology; Female; Housing, Animal; Light; Oviposition / physiology; Oviposition / radiation effects; Photoperiod; Thyroid Hormones / blood; Thyroxine / blood; Time Factors; Triiodothyronine / blood; Turkeys / blood; Turkeys / physiology
topics (OpenAlex): Animal Nutrition and Physiology; Antioxidant Activity and Oxidative Stress; Biochemical Analysis and Sensing Techniques
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UN Sustainable Development Goal Categories
15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2002 article

Effect of melatonin supplementation on the ontogeny of immunity in the Large White turkey poult

Moore, C. B., & Siopes, T. D. (2002, December 1). Poultry Science.

By: C. Moore n & T. Siopes n

author keywords: melatonin; turkey; poult; immune; ontogeny
MeSH headings : Aging; Animals; Antibody Formation; Basophils / immunology; Dietary Supplements; Erythrocytes / immunology; Hypersensitivity; Immunity, Cellular; Melatonin / administration & dosage; Phytohemagglutinins / immunology; Skin / immunology; Skin Tests; Turkeys / growth & development; Turkeys / immunology
topics (OpenAlex): Circadian rhythm and melatonin; Herbal Medicine Research Studies; Mast cells and histamine
TL;DR: Melatonin administration accelerated the development of cell-mediated (PHA-P-induced CBH reaction) and humoral (CRBC-induced antibody titer) immune responses, and these responses were elevated above controls through 21 d posthatch. (via Semantic Scholar)
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6. Clean Water and Sanitation (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2002 article

Melatonin can produce immunoenhancement in Japanese quail (Coturnix coturnix japonica) without prior immunosuppression

Moore, C. B., & Siopes, T. D. (2002, November 1). General and Comparative Endocrinology.

By: C. Moore n & T. Siopes n

MeSH headings : Adjuvants, Immunologic / administration & dosage; Adjuvants, Immunologic / pharmacology; Animals; Antibody Formation / drug effects; Coturnix / physiology; Drug Administration Schedule; Female; Immune System / drug effects; Immunity, Cellular / drug effects; Immunosuppression Therapy; Melatonin / administration & dosage; Melatonin / pharmacology
topics (OpenAlex): Circadian rhythm and melatonin; Neurobiology and Insect Physiology Research; Dietary Effects on Health
TL;DR: It was clear that transient and continuous administration of melatonin increased the cellular and humoral immune responses of Japanese quail without prior immunosuppression, suggesting that the immunoenhancing effect ofmelatonin is not limited to reconstitution of weakened immune systems, but can be observed in normal, immunologically unsuppressed birds. (via Semantic Scholar)
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6. Clean Water and Sanitation (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2002 article

Photorefractoriness in turkey breeder hens is affected by age and season

Siopes, T. D. (2002, May 1). Poultry Science.

By: T. Siopes n

author keywords: turkey; photorefractory; age; season; light
MeSH headings : Age Factors; Animals; Circadian Rhythm / physiology; Female; Incidence; Light; Oviposition / physiology; Photic Stimulation; Photoperiod; Seasons; Time Factors; Turkeys / physiology
topics (OpenAlex): Plant and animal studies; Animal Behavior and Reproduction; Animal Nutrition and Physiology
TL;DR: It was concluded that age and season could affect PR. (via Semantic Scholar)
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15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2002 article

Pineal melatonin secretion, but not ocular melatonin secretion, is sufficient to maintain normal immune responses in Japanese quail (Coturnix coturnix japonica)

Moore, C. B., Siopes, T. D., Steele, C. T., & Underwood, H. (2002, May 1). General and Comparative Endocrinology.

By: C. Moore n, T. Siopes n, C. Steele n & H. Underwood n

author keywords: melatonin; immune response; Japanese quail; pineal; eye
MeSH headings : Animals; Antibody Formation; CD4 Lymphocyte Count; CD8-Positive T-Lymphocytes; Coturnix / immunology; Coturnix / physiology; Eye / metabolism; Female; Flow Cytometry; Immunity; Immunity, Cellular; Lymphocyte Count; Melatonin / administration & dosage; Melatonin / metabolism; Pineal Gland / metabolism; Pineal Gland / surgery
topics (OpenAlex): Circadian rhythm and melatonin; Allergic Rhinitis and Sensitization; Neurobiology and Insect Physiology Research
TL;DR: The data suggest that immunodepression is only observed in birds with two thirds of the plasma melatonin removed by pinealectomy, and removal of one third of the Plasma melatonin is not sufficient to reduce cellular and humoral responses in the Japanese quail. (via Semantic Scholar)
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2002 article

Relative and absolute photorefractoriness in turkey hens: profiles of prolactin, thyroxine, and triiodothyronine early in the reproductive cycle

Proudman, J. A., & Siopes, T. D. (2002, August 1). Poultry Science.

By: J. Proudman* & T. Siopes*

author keywords: turkey; photorefractoriness; prolactin; thyroid hormone
MeSH headings : Animals; Female; Luteinizing Hormone / blood; Ovary / physiology; Photoperiod; Prolactin / blood; Reproduction / physiology; Reproduction / radiation effects; Seasons; Thyroxine / blood; Triiodothyronine / blood; Turkeys / physiology
topics (OpenAlex): Animal Behavior and Reproduction; Plant and animal studies; Animal Vocal Communication and Behavior
TL;DR: It is concluded that turkey hens may exhibit rPR and aPR during a reproductive cycle, whereas flockmates may remain PS for at least 27 wk, and plasma levels of thyroxine were lower at 1 and 2 wk following photostimulation in hens that subsequently became PR than in he chickens that remained PS. (via Semantic Scholar)
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UN Sustainable Development Goal Categories
15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2001 article

Temporal Characteristics and Incidence of Photorefractoriness in Turkey Hens

Siopes, T. D. (2001, January 1). Poultry Science.

By: T. Siopes n

author keywords: photorefractoriness; turkey; photoperiod; light; egg production
MeSH headings : Animals; Female; Light; Nesting Behavior; Photoperiod; Reproduction; Time Factors; Turkeys / physiology
topics (OpenAlex): Plant and animal studies; Animal Behavior and Reproduction; Animal Nutrition and Physiology
TL;DR: It was concluded that most, but not all, first-year turkey hens become PR and that the incidence is highly variable; PR may be relative or absolute, and absolute PR occurs abruptly but with a highly variable onset time. (via Semantic Scholar)
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UN Sustainable Development Goal Categories
15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

2000 article

Circadian Ovulatory Rhythms in Japanese Quail: Role of Ocular and Extraocular Pacemakers

Zivkovic, B. D., Underwood, H., & Siopes, T. (2000, April 1). Journal of Biological Rhythms.

By: B. Zivkovic*, H. Underwood n & T. Siopes n

author keywords: Japanese quail; circadian; ovulation; internal coincidence; retina; extraretinal photoreception
MeSH headings : Animals; Blindness / physiopathology; Body Temperature; Circadian Rhythm / physiology; Coturnix / physiology; Female; Ocular Physiological Phenomena; Oviposition; Ovulation / physiology; Photoperiod; Photoreceptor Cells, Vertebrate / physiology; Sensory Deprivation / physiology; Vision, Ocular / physiology
topics (OpenAlex): Circadian rhythm and melatonin; Neurobiology and Insect Physiology Research; Plant and animal studies
TL;DR: The results do not show a role for ocular pacemakers in the control of ovulation, but they do support the hypotheses that entrainment of the central oscillators by extraretinally perceived light is sufficient to preserve a normal ovulatory pattern in LD in the absence of the ocularpacemakers. (via Semantic Scholar)
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UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2000 article

Effects of Lighting Conditions and Melatonin Supplementation on the Cellular and Humoral Immune Responses in Japanese Quail Coturnix coturnix japonica

Moore, C. B., & Siopes, T. D. (2000, July 1). General and Comparative Endocrinology.

By: C. Moore n & T. Siopes n

author keywords: melatonin; photoperiod; immune response; Japanese quail
MeSH headings : Animals; Antibody Formation / drug effects; Basophils / immunology; Coturnix / immunology; Immunity, Cellular / drug effects; Melatonin / administration & dosage; Melatonin / pharmacology; Photoperiod; Phytohemagglutinins / pharmacology
topics (OpenAlex): Circadian rhythm and melatonin; Allergic Rhinitis and Sensitization; Asthma and respiratory diseases
TL;DR: It was clear that quail placed in daily light-dark cycles (LD), possessing a diurnal rhythm of melatonin, had significantly elevated immune responses as compared to those birds in LL, and melatonin supplemented to birds exposed to LL was immuno-enhancing. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

1999 article

A Survey and Overview of Lighting Practices in the U. S. Turkey Breeder Industry

Grimes, J. L., & Siopes, T. D. (1999, December 1). The Journal of Applied Poultry Research.

By: J. Grimes n & T. Siopes n

author keywords: turkey breeder hens; turkey egg production; turkey industry; turkey lighting practices
topics (OpenAlex): Animal Nutrition and Physiology; Effects of Environmental Stressors on Livestock; Animal Behavior and Welfare Studies
Source: Web Of Science
Added: August 6, 2018

1999 article

Ahemeral lighting of turkey breeder hens. 3. Temporary application and early age at lighting

Siopes, T. D., & Neely, E. R. (1999, March 1). Poultry Science.

By: T. Siopes n & E. Neely n

author keywords: ahemeral lighting; turkey; photostimulation; age at lighting; light cycle
MeSH headings : Age Factors; Animal Husbandry; Animals; Eggs; Female; Housing, Animal; Lighting / adverse effects; Photoperiod; Reproduction; Turkeys / physiology
topics (OpenAlex): Animal Nutrition and Physiology; Avian ecology and behavior; Plant and animal studies
TL;DR: It is concluded that temporary use ofAH at the start of photostimulation is better than continuous use of AH throughout lay and resulted in improved reproductive performance of hens photostIMulated at an early age. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

1999 article

Effects of transient treatment with 6-N-propyl-2-thiouracil on testis development and function in breeder turkeys

Knowlton, J. A., Siopes, T. D., Rhoads, M. L., & Kirby, J. D. (1999, July 1). Poultry Science.

By: J. Knowlton n, T. Siopes n, M. Rhoads n & J. Kirby n

author keywords: turkey tom; testes; propylthiouracil; sexual maturity; semen
MeSH headings : Aging / physiology; Animals; Antimetabolites / pharmacology; Fertilization; Male; Propylthiouracil / pharmacology; Semen / physiology; Sexual Maturation / drug effects; Spermatozoa / drug effects; Spermatozoa / physiology; Testis / drug effects; Testis / growth & development; Testis / physiology; Testosterone / blood; Thyroid Hormones / blood; Turkeys / physiology
topics (OpenAlex): Sperm and Testicular Function; Animal Nutrition and Physiology; Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities
TL;DR: It was concluded that antithyroid treatment with PTU was dependent on dose and time of treatment for effects on both sexual development and early reproductive performance. (via Semantic Scholar)
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UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

1999 article

Improved effectiveness of artificial insemination of turkey hens associated with ahemeral light-dark cycles and age at photostimulation

Siopes, T. D. (1999, June 1). Poultry Science.

By: T. Siopes n

author keywords: ahemeral lighting; fertility; turkey; photostimulation; age
MeSH headings : Animal Husbandry; Animals; Female; Fertility / physiology; Housing, Animal; Insemination, Artificial / veterinary; Photoperiod; Turkeys / physiology
topics (OpenAlex): Animal Nutrition and Physiology; Animal Behavior and Reproduction; Plant and animal studies
TL;DR: It may be concluded that AH lighting can dramatically improve the effectiveness of AI under certain adverse conditions, such as early age at lighting and reduced exposure of the hen to sperm. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

1999 article

Intermittent lighting increases egg weight and facilitates early photostimulation of turkey breeder hens

Siopes, T. D. (1999, July 1). Poultry Science.

By: T. Siopes n

author keywords: intermittent light; turkey; age; egg weight; photostimulation
MeSH headings : Animals; Darkness; Eggs; Female; Housing, Animal; Light; Lighting; Oviposition / physiology; Oviposition / radiation effects; Turkeys / physiology
topics (OpenAlex): Animal Nutrition and Physiology; Animal Behavior and Welfare Studies; Avian ecology and behavior
TL;DR: Interestingly, the increased egg weight in the IL treatment persisted to the end of lay, well after IL had been switched to 16L:8D, indicating that IL lighting facilitated successful early lighting of hens. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

1998 article

Absence of a seasonal effect on the critical day length for photorefractoriness in turkey breeder hens

Siopes, T. D. (1998, January 1). Poultry Science.

By: T. Siopes n

author keywords: turkey; light; photorefractoriness; critical day length; photoperiod
MeSH headings : Analysis of Variance; Animals; Circadian Rhythm / physiology; Darkness; Female; Light; Oviposition / physiology; Probability; Seasons; Turkeys / physiology
topics (OpenAlex): Animal Nutrition and Physiology; Plant and animal studies
TL;DR: Results supported a static CDL for photorefractoriness and suggest that any daily photoperiod exceeding 12 h will activate processes leading to photoreFractoriness, independent of season. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

1997 article

Ahemeral lighting of turkey breeder hens. 1. Cycle length effects on egg production and egg characteristics

Siopes, T. D., & Neely, E. R. (1997, May 1). Poultry Science.

By: T. Siopes n & E. Neely n

author keywords: turkey; light; ahemeral; photoperiod; cycle length
MeSH headings : Animals; Egg Shell / physiology; Egg Yolk / physiology; Eggs / standards; Female; Lighting; Linear Models; Ovalbumin / standards; Oviposition / physiology; Photoperiod; Time Factors; Turkeys / physiology
topics (OpenAlex): Animal Nutrition and Physiology; Agricultural Practices and Plant Genetics; Livestock and Poultry Management
TL;DR: It may be concluded that an effective practical range of light-dark cycles for turkeys is 23 to 28 h and that 28 h is a reasonable limit to maximize EW and shell thickness while minimizing a reduction in egg production. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

1997 article

Ahemeral lighting of turkey breeder hens. 2. Early age at lighting and reproductive performance

Siopes, T. D., & Neely, E. R. (1997, December 1). Poultry Science.

By: T. Siopes n & E. Neely n

author keywords: turkey; ahemeral light; egg weight; photoperiod; poult weight
MeSH headings : Aging / physiology; Analysis of Variance; Animals; Body Weight / physiology; Circadian Rhythm / physiology; Eggs; Female; Lighting; Oviposition / physiology; Photoperiod; Reproduction / physiology; Time Factors; Turkeys / physiology
topics (OpenAlex): Animal Nutrition and Physiology; Plant and animal studies; Animal Behavior and Reproduction
TL;DR: It was concluded that although ahemeral lighting increased egg weight and poult weight in turkey hens photostimulated early, continuous application of ahemerAL lighting throughout the lay period had adverse effects on some components of reproductive performance. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

1997 article

Eye and gonad: role in the dual-oscillator circadian system of female Japanese quail

Underwood, H., Siopes, T., & Edmonds, K. (1997, January 1). American Journal of Physiology-Regulatory, Integrative and Comparative Physiology.

By: H. Underwood n, T. Siopes n & K. Edmonds n

author keywords: thermoregulation; oviposition; suprachiasmatic nuclei; internal coincidence; circadian pacemaker
MeSH headings : Animals; Body Temperature / physiology; Circadian Rhythm; Coturnix / physiology; Female; Ocular Physiological Phenomena; Ovariectomy; Ovary / physiology; Oviposition / physiology; Photoperiod; Sensory Deprivation
topics (OpenAlex): Circadian rhythm and melatonin; Plant and animal studies; Animal Behavior and Reproduction
TL;DR: The two free-running oscillators in eye-patched birds showed evidence of mutual interaction, and significantly, the phase relationships that occur as the two oscillators interact can determine whether or not ovulation occurs. (via Semantic Scholar)
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UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

1997 article

Transient hypothyroidism reinitiates egg laying in turkey breeder hens: termination of photorefractoriness by propylthiouracil

Siopes, T. (1997, December 1). Poultry Science.

By: T. Siopes n

author keywords: thyroid; photorefractoriness; propylthiouracil; photoperiod; turkey
MeSH headings : Animals; Antithyroid Agents / pharmacology; Body Weight / physiology; Dose-Response Relationship, Drug; Eating / physiology; Female; Fertility / physiology; Hypothyroidism / blood; Hypothyroidism / physiopathology; Hypothyroidism / veterinary; Oviposition / drug effects; Oviposition / physiology; Photoperiod; Poultry Diseases / blood; Poultry Diseases / physiopathology; Propylthiouracil / pharmacology; Thyroid Gland / drug effects; Thyroid Gland / metabolism; Thyroid Gland / physiology; Thyroxine / blood; Thyroxine / physiology; Time Factors; Triiodothyronine / blood; Triiodothyronine / physiology; Turkeys
topics (OpenAlex): Animal Nutrition and Physiology; Antioxidant Activity and Oxidative Stress; Biochemical Analysis and Sensing Techniques
TL;DR: Turkey hens can be effectively recycled by pharmacological manipulation of the thyroid gland and the results are supportive of thyroid hormone(s) involvement in maintaining photorefractoriness in turkey hens. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

1995 article

Incidence of Prelay Squatting Behavior is not Related to Subsequent Egg Laying in Turkey Breeder Hens

SIOPES, T. D. (1995, June 1). Poultry Science.

By: T. Siopes n

author keywords: TURKEY; SQUATTING BEHAVIOR; EGG PRODUCTION; STRAIN; AGE
MeSH headings : Analysis of Variance; Animals; Female; Light; Oviposition; Posture; Sexual Behavior, Animal; Species Specificity; Turkeys / physiology
topics (OpenAlex): Animal Nutrition and Physiology; Plant Reproductive Biology; Plant and animal studies
TL;DR: Squatting incidence varies within and between strains of hens and is not related to subsequent egg laying performance, but was generally lower in N hens than H and B hens, which showed similar squatting expression. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

1995 article

Turkey Breeder Hen Performance by Strain During Consecutive Lay Periods

SIOPES, T. D. (1995, August 1). Poultry Science.

By: T. Siopes n

author keywords: TURKEY; STRAIN; LIGHT INTENSITY; PERFORMANCE; REPRODUCTION
MeSH headings : Analysis of Variance; Animals; Body Weight / genetics; Body Weight / radiation effects; Breeding; Female; Light; Oviposition / genetics; Oviposition / radiation effects; Species Specificity; Turkeys / genetics; Turkeys / physiology
topics (OpenAlex): Animal Nutrition and Physiology; Agricultural Practices and Plant Genetics; Livestock and Poultry Management
TL;DR: Strain, year, and strain by year interaction effects were significant for egg weight and the first eggs laid, as well as subsequent eggs in both lay periods, were heaviest in N hens. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

1994 article

Critical Day Lengths for Egg Production and Photorefractoriness in the Domestic Turkey

SIOPES, T. D. (1994, December 1). Poultry Science.

By: T. Siopes n

author keywords: TURKEY; LIGHT; PHOTOREFRACTORINESS; CRITICAL DAY LENGTH; PHOTOPERIOD
MeSH headings : Animals; Eggs; Female; Ovary / physiology; Photoperiod; Seasons; Turkeys / physiology
topics (OpenAlex): Animal Nutrition and Physiology; Plant and animal studies; Antioxidant Activity and Oxidative Stress
TL;DR: It was concluded that CDL vary by season and are not fixed, but are dynamic characteristics of photoperiodic processes, thus, photoresponsiveness of turkey hens changes by season. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

1993 article

Photoperiod and seasonal influences on the growth of turkey hens

Siopes, T. D., Baughman, G. R., & Parkhurst, C. R. (1993, March 1). British Poultry Science.

By: T. Siopes n, G. Baughman n & C. Parkhurst n

MeSH headings : Animal Feed; Animal Nutritional Physiological Phenomena; Animals; Body Weight; Circadian Rhythm; Female; Light; Photoperiod; Seasons; Turkeys / growth & development
topics (OpenAlex): Animal Nutrition and Physiology; Agricultural Practices and Plant Genetics; Genetic and phenotypic traits in livestock
TL;DR: Season and photoperiod both have important and independent influences on the growth of the turkey hen and the pattern of growth was influenced by season, but notPhotoperiod. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
2. Zero Hunger (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

1992 article

Effect of Light Intensity Level During Prelay Light Restriction on Subsequent Reproductive Performance of Turkey Breeder Hens

SIOPES, T. D. (1992, June 1). Poultry Science.

By: T. Siopes n

author keywords: LIGHT INTENSITY; TURKEYS; PRELAY; PREBREEDER; REPRODUCTIVE PERFORMANCE
MeSH headings : Animals; Body Weight / radiation effects; Eggs / standards; Female; Fertility / radiation effects; Light; Oviposition / radiation effects; Reproduction / radiation effects; Turkeys / physiology
topics (OpenAlex): Animal Nutrition and Physiology; Livestock and Poultry Management; Rabbits: Nutrition, Reproduction, Health
TL;DR: There was no advantage to the use of high-intensity light during short-day light restriction of the prelay period on subsequent reproductive performance of turkey breeder hens and no consistent effects on rate of lay, percentage of fertility and hatchability, egg weight, and poult weight. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

1992 article

Effects of Age at Lighting on Reproduction of Turkey Hens

SIOPES, T. D. (1992, December 1). Poultry Science.

By: T. Siopes n

author keywords: TURKEYS; SEXUAL MATURATION; AGE; EGG PRODUCTION; LIGHTING
MeSH headings : Aging / physiology; Animals; Body Weight; Female; Light; Oviposition / physiology; Oviposition / radiation effects; Photoperiod; Reproduction / physiology; Turkeys / physiology
topics (OpenAlex): Animal Nutrition and Physiology; Livestock and Poultry Management; Plant and animal studies
TL;DR: The results do not support advancing the age at photostimulation to 28 wk or earlier, and peak egg production level and the number of eggs produced per hen during the first 20 wk of egg laying were similar among treatment groups in both experiments. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

1991 article

Light Intensity Effects on Reproductive Performance of Turkey Breeder Hens

SIOPES, T. D. (1991, October 1). Poultry Science.

By: T. Siopes n

author keywords: TURKEY; REPRODUCTION; LIGHT INTENSITY; FEED; RECYCLING
MeSH headings : Animals; Eating / radiation effects; Eggs / radiation effects; Female; Fertility / radiation effects; Light; Oviposition / radiation effects; Turkeys / physiology; Weight Gain / radiation effects
topics (OpenAlex): Animal Nutrition and Physiology; Silkworms and Sericulture Research; Agricultural Practices and Plant Genetics
TL;DR: It may be concluded that reproductive performance of turkey hens in closed confinement is equivalent within an intensity range of 54 to 324 lx. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

1991 article

Light Intensity for Turkey Breeder Hens: Degree of Darkness Required During Short-Day Light Restriction and Intensity Threshold During Photostimulation

SIOPES, T. D. (1991, June 1). Poultry Science.

By: T. Siopes n

author keywords: INTENSITY; LIGHT RESTRICTION; PHOTOSTIMULATION; THRESHOLD; TURKEYS
topics (OpenAlex): Animal Nutrition and Physiology; Plant and animal studies; Antioxidant Activity and Oxidative Stress
Source: Web Of Science
Added: August 6, 2018

1990 article

Effect of Intermittent Lighting on the Reproductive Performance of First-Year and Recycled Turkey Hens ,

SIOPES, T. D., & PYRZAK, R. (1990, January 1). Poultry Science.

By: T. Siopes n & R. Pyrzak n

MeSH headings : Age Factors; Animals; Female; Light; Oviposition; Periodicity; Reproduction; Turkeys / physiology
topics (OpenAlex): Animal Nutrition and Physiology; Avian ecology and behavior; Animal Behavior and Welfare Studies
TL;DR: The conclusion was that, for turkey hens, intermittent lighting can effectively improve reproductive performance and late-season fertility, feed efficiency, and egg weight were significantly increased by the IL treatment. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

1989 article

Pineal and ocular influences on male and female turkeys: Plasma luteinizing hormone and prolactin levels during gonadal development

Siopes, T. D., & Halawani, M. E. E. (1989, February 1). General and Comparative Endocrinology.

By: T. Siopes n & M. Halawani n

MeSH headings : Animals; Female; Luteinizing Hormone / blood; Male; Ocular Physiological Phenomena; Ovary / physiology; Pineal Gland / physiology; Prolactin / blood; Testis / physiology; Turkeys / physiology
topics (OpenAlex): Animal Nutrition and Physiology; Reproductive Physiology in Livestock; Sperm and Testicular Function
TL;DR: It was concluded that neither the pineal gland nor the eyes affect plasma LH levels of male turkeys during testicular development or female Turkeys during photostimulated ovarian recrudescence. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
3. Good Health and Well-being (Web of Science; OpenAlex)
Source: Web Of Science
Added: August 6, 2018

1989 article

Prelay Light Restriction of Turkey Hens: Daylength Versus Exposure Time ,

SIOPES, T. D. (1989, October 1). Poultry Science.

By: T. Siopes n

MeSH headings : Animals; Circadian Rhythm; Female; Fertility; Oviposition; Photic Stimulation; Turkeys / physiology
topics (OpenAlex): Animal Nutrition and Physiology; Livestock and Poultry Management; Silkworms and Sericulture Research
TL;DR: A lack of interaction between the light restriction daylength and exposure time suggests that the requirements for effective light restriction are rather specific and cannot be beneficially manipulated by various combinations of day length and weeks of exposure. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

1989 article

Relationship Between Duration and Intensity of Environmental Light on the Growth Performance of Male Turkeys ,

SIOPES, T. D., BAUGHMAN, G. R., PARKHURST, C. R., & TIMMONS, M. B. (1989, November 1). Poultry Science.

By: T. Siopes n, G. Baughman n, C. Parkhurst n & M. Timmons  n

MeSH headings : Animals; Circadian Rhythm; Eating; Leg / abnormalities; Light; Lighting; Male; Organ Size; Random Allocation; Testis / growth & development; Turkeys / growth & development; Weight Gain
topics (OpenAlex): Animal Nutrition and Physiology; Avian ecology and behavior; Aquaculture Nutrition and Growth
TL;DR: From the results of this study it seems clear that daylength can have an important impact on the growth performance of tom turkeys whereas variations in light intensity generally resulted in negligible differences in response. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

1986 article

Plasma prolactin and luteinizing hormone levels of pinealectomized and enucleated turkey hens

Siopes, T. D., & Halawani, M. E. E. (1986, April 1). General and Comparative Endocrinology.

By: T. Siopes n & M. Halawani n

MeSH headings : Animals; Circadian Rhythm; Environment, Controlled; Female; Light; Luteinizing Hormone / blood; Ocular Physiological Phenomena; Pineal Gland / physiology; Prolactin / blood; Turkeys / physiology
topics (OpenAlex): Circadian rhythm and melatonin; Hormonal and reproductive studies; Animal Nutrition and Physiology
TL;DR: It was concluded that the pineal gland does not play an essential role in maintaining circulating LH and prolactin levels in constant light or a photoperiod of 16L:8D. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

1984 article

Recycling Turkey Hens with Low Light Intensity

SIOPES, T. D. (1984, July 1). Poultry Science.

By: T. Siopes n

MeSH headings : Animals; Female; Light; Male; Oviposition; Turkeys / physiology
topics (OpenAlex): Animal Nutrition and Physiology; Plant and animal studies; Avian ecology and behavior
TL;DR: Yearling turkey breeder hens were recycled into a second egg production cycle by exposure to 16 hr of light per day of .5, 2.2, 4.3, or 7.6 lx intensity, terminated photorefractoriness and resulted in egg production comparable to the controls in the .5 lx treatment only. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

1984 article

The Effect of Full-Spectrum Fluorescent Lighting on Reproductive Traits of Caged Turkey Hens

SIOPES, T. D. (1984, June 1). Poultry Science.

By: T. Siopes n

MeSH headings : Animals; Body Weight; Eating; Female; Fluorescence; Housing, Animal; Light; Oviposition; Reproduction; Turkeys / physiology
topics (OpenAlex): Animal Nutrition and Physiology; Insect and Pesticide Research; Plant and animal studies
TL;DR: There were no significant differences in egg production, fertility, hatchability, or poult weight between the incandescent and FS fluorescent light treatment in either the first or second year egg laying cycle. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

1984 article

The Effect of High and Low Intensity Cool-White Fluorescent Lighting on the Reproductive Performance of Turkey Breeder Hens

SIOPES, T. D. (1984, May 1). Poultry Science.

By: T. Siopes n

MeSH headings : Animals; Body Weight / radiation effects; Female; Light; Oviposition / radiation effects; Reproduction / radiation effects; Turkeys / physiology
topics (OpenAlex): Animal Nutrition and Physiology; Rabbits: Nutrition, Reproduction, Health; Aquaculture Nutrition and Growth
TL;DR: There were no significant differences in early season egg production, fertility, hatchability, egg weight, and egg specific gravity due to light intensity or light source over the 20-week test period, however, CW fluorescent light delayed the onset of egg production from that of hens exposed to incandescent light. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

1984 article

The effect of ovariectomy on broodiness and plasma prolactin levels in turkey hens during a photo-induced reproductive cycle

Siopes, T. D., & Burke, W. H. (1984, October 1). Theriogenology.

By: T. Siopes n & W. Burke*

topics (OpenAlex): Animal Nutrition and Physiology; Plant Reproductive Biology; Hypothalamic control of reproductive hormones
TL;DR: It was concluded that the ovary is essential in expressing broody nesting behavior, the large increase in plasma Prolactin associated with this behavior, and the prolactin increase in hens that did not demonstrate nesting behavior. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

1983 article

Effect of Intermittent Lighting on Energy Savings and Semen Characteristics of Breeder Tom Turkeys

SIOPES, T. D. (1983, November 1). Poultry Science.

By: T. Siopes n

MeSH headings : Animals; Body Temperature; Body Weight; Energy Metabolism; Lighting; Male; Rectum; Semen / cytology; Skin Temperature; Spermatozoa / cytology; Turkeys / physiology
topics (OpenAlex): Animal Nutrition and Physiology; Effects of Environmental Stressors on Livestock; Reproductive biology and impacts on aquatic species
TL;DR: It was concluded that toms can be maintained more efficiently on intermittent lighting than a standard lighting program of 15 hr of light per day. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

1983 article

Effect of Pinealectomy on Broodiness of Turkey Hens

SIOPES, T. D. (1983, November 1). Poultry Science.

By: T. Siopes n

MeSH headings : Animals; Female; Nesting Behavior / physiology; Oviposition; Pineal Gland / physiology; Turkeys / physiology
topics (OpenAlex): Animal Nutrition and Physiology; Plant Reproductive Biology; Agricultural Practices and Plant Genetics
TL;DR: It was concluded that the pineal gland does not play an essential role in the onset or maintenance of broodiness in turkey hens. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

1983 article

Persistency of broodiness in recycled turkey hens

Siopes, T. D. (1983, November 1). Theriogenology.

By: T. Siopes n

topics (OpenAlex): Animal Nutrition and Physiology; Bird parasitology and diseases; Livestock and Poultry Management
TL;DR: It was concluded that broody traits of a given hen are carried over into subsequent cycles. (via Semantic Scholar)
UN Sustainable Development Goals Color Wheel
UN Sustainable Development Goal Categories
15. Life on Land (Web of Science)
Source: Web Of Science
Added: August 6, 2018

1983 article

The Effect of Light Intensity on the Growth Performance of Male Turkeys

SIOPES, T. D., TIMMONS, M. B., BAUGHMAN, G. R., & PARKHURST, C. R. (1983, December 1). Poultry Science.

By: T. Siopes n, M. Timmons  n, G. Baughman n & C. Parkhurst n

MeSH headings : Animals; Body Weight; Energy Metabolism; Light; Male; Mortality; Sexual Maturation; Turkeys / growth & development; Turkeys / physiology
topics (OpenAlex): Animal Nutrition and Physiology; Bird parasitology and diseases; Avian ecology and behavior
TL;DR: Within closed confinement a constant light intensity of 1 lx resulted in an inferior growth performance, whereas 11 lx was sufficient to allow a growth performance similar to that obtained with 110 or 220 lx, and in open confinement supplemental artificial light at night did not result in an improved growth performance from birds on natural daylengths. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

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