@article{grimes_carter_gernat_godwin_2007, title={A novel bedding material made from cotton waste, gypsum, and old newsprint for rearing turkeys}, volume={16}, ISSN={["1537-0437"]}, DOI={10.3382/japr.2007-00034}, abstractNote={SUMMARY Two experiments and 3 field trials were conducted to examine the usefulness of a novel bedding material for rearing Large White commercial turkeys. The control bedding was pine shavings (PS) in both experiments and all trials. The novel bedding, aGroChips (AC), is a chopped paper product made from cotton lint waste, gypsum, and old newsprint following a proprietary paper manufacturing process. In both experiments, hens and toms were reared according to typical industry techniques. In the first experiment, use of AC resulted in significantly (P < 0.05) heavier toms and hens. In the second, the toms brooded and reared on AC were significantly (P < 0.05) heavier than those brooded and reared on PS, whereas toms brooded on one bedding and then reared on the other were intermediate in weight. There were no differences in final cumulative FCR or carcass yield in either experiment. Three field trials were conducted with Large White commercial turkey hens in which the hens were brooded either on PS or AC, with both groups reared on PS. There was a mean increase of 0.2 kg in BW, a decrease (improvement) of 0.03 in FCR, and an increase of 3,200 kg per trial for AC-brooded birds (based on 16,000 hens placed per brooder house). A hard, dry litter crust was observed in the AC houses. With subsequent testing, further changes in the manufacturing process to create a hard, durable pellet may result in a more usable and useful bedding material.}, number={4}, journal={JOURNAL OF APPLIED POULTRY RESEARCH}, author={Grimes, J. L. and Carter, T. A. and Gernat, A. E. and Godwin, J. L.}, year={2007}, pages={598–604} }
 @article{grimes_carter_godwin_2006, title={Use of a litter material made from cotton waste, gypsum, and old newsprint for rearing broiler chickens}, volume={85}, ISSN={["0032-5791"]}, DOI={10.1093/ps/85.3.563}, abstractNote={Three experiments, which included 4 broiler flocks, were conducted to examine the usefulness of a novel bedding material for rearing broilers. The control bedding was pine shavings. The novel bedding, aGroChips (AC), was a chopped material made from cotton lint waste, gypsum, and old newsprint using a proprietary paper manufacturing process (Novovita, Inc., Raleigh, NC). All birds were fed the same feeding program: starter from 0 to 3 wk, grower from 3 to 5 or 6 wk, and finisher during the last week. Birds were marketed at either 6 or 7 wk of age. Feed consumption by pen and individual bird BW were measured at 3 and 6 or 7 wk. Mean BW and feed conversion, adjusted to include weight of mortality, were calculated. A sample of birds (n = 10) from each pen was evaluated for hock and foot pad condition. Each pen was evaluated at the end of the trial for litter cake index in 3 of the 4 flocks. Litter cake index scores were generally higher for birds reared on AC litters. There were no other differences in bird performance for any of the flocks. In conclusion, broilers reared on AC bedding perform as well as those reared on pine shavings.}, number={3}, journal={POULTRY SCIENCE}, author={Grimes, JL and Carter, TA and Godwin, JL}, year={2006}, month={Mar}, pages={563–568} }
 @article{grimes_godwin_2005, title={Enzyme supplementation may improve diets}, volume={21}, ISBN={1388-3119}, number={8}, journal={World Poultry (Doetinchem, Netherlands)}, author={Grimes, J. L. and Godwin, J. L.}, year={2005}, pages={14} }
 @article{grimes_godwin_2005, title={Phytase helps to reduce the phosphorus load into the environment}, volume={21}, ISBN={1388-3119}, number={9}, journal={World Poultry (Doetinchem, Netherlands)}, author={Grimes, J. L. and Godwin, J. L.}, year={2005}, pages={13} }
 @article{grimes_noll_brannon_godwin_smith_rowland_2004, title={Effect of a chelated calcium proteinate dietary supplement on the reproductive performance of large white turkey breeder hens}, volume={13}, ISSN={["1056-6171"]}, DOI={10.1093/japr/13.4.639}, abstractNote={Abstract Researchers have reported that organic mineral complexes can have increased availability compared with inorganic sources. This work was conducted to examine the inclusion of a small amount of chelated calcium proteinate (CalKey) into turkey breeder hen diets and its effect on turkey breeder hen performance. Two studies were conducted, one each in Minnesota (A) and North Carolina (B). Typical corn and soybean meal diets without animal by-product meals were used as the control diets. Hens in the first study were photostimulated at 30 wk of age in December with 15L:9D for a 24-wk lay period, and hens in a second study were photostimulated after an induced molt in January with 15.5L:8.5D for a 24-wk lay period. In study A, hatchability of fertile eggs was improved during the last 4 wk of production for hens fed calcium proteinate. During 1 period, hens fed calcium proteinate had lower daily feed intake and increased incidence of soft-shelled eggs. In study B, hatchability of fertile eggs was improved for hens fed dietary calcium proteinate for 19 and 20 wk of lay. This result was associated with improved embryo livability for wk 3 and 4 of development. It was concluded that feeding 500 ppm calcium from chelated calcium proteinate improved hatchability of turkey eggs during the later period of egg production, which was associated with decreased late embryo mortality.}, number={4}, journal={JOURNAL OF APPLIED POULTRY RESEARCH}, author={Grimes, JL and Noll, S and Brannon, J and Godwin, JL and Smith, JC and Rowland, RD}, year={2004}, pages={639–649} }
 @article{godwin_luckenbach_borski_2003, title={Ecology meets endocrinology: environmental sex determination in fishes}, volume={5}, ISSN={["1525-142X"]}, DOI={10.1046/j.1525-142X.2003.03007.x}, abstractNote={Van Valen (1973) characterized evolution as the control of development by ecology. Sex determination in fishes provides some clear examples of this “control” in operation. Teleost fishes show a remarkable variety of sex determination and differentiation patterns. These range from systems in which sex is determined by sex chromosomes, as in birds and mammals, to simultaneous hermaphrodites that alternate spawning as a female and male on a second to second basis. This extraordinary flexibility may result from a combined lack of developmental constraint on reproductive structures in many lineages and selection for sexual lability in the face of environmental unpredictability. This review addresses environmental influences on sex determination and differentiation in fishes. There is a variety of documented environmental influences on sex determination (ESD) in fishes. We focus here on two classes of examples where the key environmental cues are of clear ecological relevance, the effects appear especially likely to be important as a normal part of the life history, and where there is evidence suggesting the sexual patterns observed represent adaptations that increase individual fitness. These classes are sex determination that is controlled by social interactions (behavioral sex determination [BSD]) (Crews 1993) and temperaturedependent sex determination (TSD). Sex determination controlled by social influences can occur before or after sexual maturation but appears to maximize the expected reproductive success of individuals in both cases. Here we first address BSD and then TSD in fishes. For each pattern of sex determination, we discuss selection pressures that appear to favor these patterns, examples of each, and what is known regarding the underlying physiological mechanisms. For more comprehensive and general reviews of patterns and mechanisms of sex determination in fishes, the reader is referred to several excellent reviews (Nakamura et al. 1998; Baroiller et al. 1999; Baroiller and D’Cotta 2001; Piferrer 2001). The major focus in studies of physiological mediation of teleost sex determination is what is referred to by endocrinologists as the hypothalamo-pituitary-gonadal (HPG) axis (Fig. 1). This axis consists primarily of hypothalamic neurosecretory neurons producing gonadotropin-releasing hormone (GnRH), gonadotropins produced in and released from the pituitary gland (GtH I and GtH II), and the gonad as the major site of steroid biosynthesis with its steroid metabolizing enzymes, steroid hormone receptors, and a variety of other proteins that mediate steroid hormone action. One steroid biosynthetic enzyme that has been a particularly fruitful focus in correlative and manipulative studies of vertebrate sex determination is cytochrome P-450 aromatase. This enzyme catalyzes the conversion of androgens to estrogens (primarily testosterone to estradiol-17 ). Aromatase expression correlates with female determination in a variety of vertebrates, and aromatasespecific antagonists can block female development in fishes, amphibians, reptiles, and birds (Elbrecht and Smith 1992; Lance and Bogart 1992; Crews et al. 1994; Wennstrom and Crews 1995; Kitano et al. 1999; D’Cotta et al. 2001). Estradiol-17 plays a central role in female reproductive physiology in fishes, whereas the androgen 11-ketotestosterone (11-KT) is crucial to gamete maturation and the expression of secondary sexual characteristics in males (Borg 1994; Brantley et al. 1993). Importantly, testosterone levels often do not differ between male and female fishes or are higher in females (Borg 1994). Because of the central role of aromatase in the biosynthesis of estrogens, it will be a focus in consideration of mechanisms by which environmental information leads to sex determination responses. More generally, our understanding of vertebrate sexual function indicates the HPG axis plays the key role in transducing environmental information into gonadal determination, differentiation, and maturation events. A general theme of this review is where and how this transduction may occur in the HPG axis.}, number={1}, journal={EVOLUTION & DEVELOPMENT}, author={Godwin, J and Luckenbach, JA and Borski, RJ}, year={2003}, pages={40–49} }
 @article{grimes_williams_godwin_smith_2003, title={Heat treatment of turkey litter for reuse as bedding}, volume={2}, ISBN={1682-8356}, DOI={10.3923/ijps.2003.287.292}, abstractNote={Local and national laws regulating poultry litter (PL) land application may require that PL be applied based on crop needs and PL nutrient content such as N and P. In addition, some may require monitoring of soil metals such as Cu and Zn. Even with efforts to decrease fecal nutrient excretion, there is also a need to extend the useful life of current bedding materials and to develop alternative uses of spent PL. Heat treatment of PL may extend bedding life and offer alternative uses of PL. The objective of this study was to determine if heat processed turkey litter (TL) can be reused as bedding for turkeys. Pine shavings (PS) which had been used as bedding to rear Large White male turkeys from hatch to 20 weeks of age was processed at 95 and 220 C in an enclosed auger system. Four litter treatments (LT) were used: 1) control - new PS (T ), o 1 2) TL processed at 95 C (T ), 3) a 70:30 (w/w) mixture of TL processed at 95 or 220 C (T ) and 4) a 95:5 o o 2 3 (w/w) mixture of TL processed at 95 or 220 C (T ). These bedding mixtures were placed in 36 floor pens in o 4 a randomized block design to provide 9 replicate pens per LT. Thirty Large White turkey hen poults were placed in each pen on day of hatch. The birds were reared to 14 wk. Mortality and feed consumption were monitored. Period and cumulative feed conversion (FC) ratios were calculated. Regression analysis of SAS, Inc. was used for data analysis. The LS Means procedure was used to separate treatment means (P<0.05). At 6 wks, T hens were heavier than T (1.78 kg), T (1.80 kg) or T (1.81 kg) hens. There were no differences 3 1 2 4 in BW at 10 (5.42 kg) or 14 wk (8.67 kg) among treatments. There were no differences in FC. The LT did not affect bird mortality. Litter treated by the heat process used for this study produces a bedding material suitable for rearing market turkeys.}, number={5}, journal={International Journal of Poultry Science}, author={Grimes, J. L. and Williams, C. M. and Godwin, J. L. and Smith, J. C.}, year={2003}, pages={287} }
 @article{grimes_williams_carter_godwin_2000, title={Heat processing of turkey litter for re-use as a bedding material}, ISBN={0962768267}, journal={Proceedings, 2000 National Poultry Waste Management Symposium}, publisher={Auburn University, AL : National Poultry Waste Management Symposium Committee}, author={Grimes, J. L. and Williams, C. M. and Carter, T. A. and Godwin, J. L.}, year={2000}, pages={353} }
 @article{godwin_carter_grimes_2000, title={The use of litter plus(R) as a bedding material for broilers}, ISBN={0962768267}, journal={Proceedings, 2000 National Poultry Waste Management Symposium}, publisher={Auburn University, AL : National Poultry Waste Management Symposium Committee}, author={Godwin, J. L. and Carter, T. A. and Grimes, J. L.}, year={2000}, pages={344} }