@article{shertzer_bacheler_pine_runde_buckel_rudershausen_macmahan_2020, title={Estimating population abundance at a site in the open ocean: combining information from conventional and telemetry tags with application to gray triggerfish (<i>Balistes capriscus</i>)}, volume={77}, ISSN={0706-652X 1205-7533}, url={http://dx.doi.org/10.1139/cjfas-2018-0356}, DOI={10.1139/cjfas-2018-0356}, abstractNote={ Estimates of animal abundance are widely used to support conservation and resource management. For populations in open systems, abundance estimates from tagging data can be highly uncertain or biased. Here, we develop a novel approach to estimate abundance of an open population by pairing two models, each utilizing distinct tagging data. Using data from telemetry tags, we infer movement rates to and from the study site with a Markovian model allowing for an environmental effect. Then, using data from conventional passive tags, we apply a Lincoln–Petersen abundance estimator modified to account for mortality and movement. After developing the model within a Bayesian framework, we demonstrate its application to data on gray triggerfish (Balistes capriscus) tagged in the Atlantic Ocean off North Carolina, USA. For this open population, we estimate site abundance to be ∼1000 fish (∼2000 fish·km–2) and additionally find evidence for an effect of hurricanes on movement. The general approach may be useful for fisheries, wildlife, and other ecological studies utilizing multiple tag types, particularly for estimating abundance of an open population. }, number={1}, journal={Canadian Journal of Fisheries and Aquatic Sciences}, publisher={Canadian Science Publishing}, author={Shertzer, Kyle W. and Bacheler, Nathan M. and Pine, William E., III and Runde, Brendan J. and Buckel, Jeffrey A. and Rudershausen, Paul J. and MacMahan, Jamie H.}, year={2020}, month={Jan}, pages={34–43} }
 @article{bacheler_hightower_burdick_paramore_buckel_pollock_2010, title={Using generalized linear models to estimate selectivity from short-term recoveries of tagged red drum Sciaenops ocellatus: Effects of gear, fate, and regulation period}, volume={102}, ISSN={["1872-6763"]}, DOI={10.1016/j.fishres.2009.12.007}, abstractNote={Estimating the selectivity patterns of various fishing gears is a critical component of fisheries stock assessment due to the difficulty in obtaining representative samples from most gears. We used short-term recoveries (n = 3587) of tagged red drum Sciaenops ocellatus to directly estimate age- and length-based selectivity patterns using generalized linear models. The most parsimonious models were selected using AIC, and standard deviations were estimated using simulations. Selectivity of red drum was dependent upon the regulation period in which the fish was caught, the gear used to catch the fish (i.e., hook-and-line, gill nets, pound nets), and the fate of the fish upon recovery (i.e., harvested or released); models including all first-order interactions between main effects outperformed models without interactions. Selectivity of harvested fish was generally dome-shaped and shifted toward larger, older fish in response to regulation changes. Selectivity of caught-and-released red drum was highest on the youngest and smallest fish in the early and middle regulation periods, but increased on larger, legal-sized fish in the late regulation period. These results suggest that catch-and-release mortality has consistently been high for small, young red drum, but has recently become more common in larger, older fish. This method of estimating selectivity from short-term tag recoveries is valuable because it is simpler than full tag-return models, and may be more robust because yearly fishing and natural mortality rates do not need to be modeled and estimated.}, number={3}, journal={FISHERIES RESEARCH}, author={Bacheler, Nathan M. and Hightower, Joseph E. and Burdick, Summer M. and Paramore, Lee M. and Buckel, Jeffrey A. and Pollock, Kenneth H.}, year={2010}, month={Mar}, pages={266–275} }
 @article{bacheler_buckel_hightower_paramore_pollock_2009, title={A combined telemetry - tag return approach to estimate fishing and natural mortality rates of an estuarine fish}, volume={66}, ISSN={["1205-7533"]}, DOI={10.1139/F09-076}, abstractNote={A joint analysis of tag return and telemetry data should improve estimates of mortality rates for exploited fishes; however, the combined approach has thus far only been tested in terrestrial systems. We tagged subadult red drum ( Sciaenops ocellatus ) with conventional tags and ultrasonic transmitters over 3 years in coastal North Carolina, USA, to test the efficacy of the combined telemetry – tag return approach. There was a strong seasonal pattern to monthly fishing mortality rate (F) estimates from both conventional and telemetry tags; highest F values occurred in fall months and lowest levels occurred during winter. Although monthly F values were similar in pattern and magnitude between conventional tagging and telemetry, information on F in the combined model came primarily from conventional tags. The estimated natural mortality rate (M) in the combined model was low (estimated annual rate ± standard error: 0.04 ± 0.04) and was based primarily upon the telemetry approach. Using high-reward tagging, we estimated different tag reporting rates for state agency and university tagging programs. The combined telemetry – tag return approach can be an effective approach for estimating F and M as long as several key assumptions of the model are met.}, number={8}, journal={CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES}, author={Bacheler, Nathan M. and Buckel, Jeffrey A. and Hightower, Joseph E. and Paramore, Lee M. and Pollock, Kenneth H.}, year={2009}, month={Aug}, pages={1230–1244} }
 @article{bacheler_paramore_buckel_hightower_2009, title={Abiotic and biotic factors influence the habitat use of an estuarine fish}, volume={377}, ISSN={["0171-8630"]}, DOI={10.3354/meps07805}, abstractNote={For migratory fishes that occupy multiple habitats, surveys conducted at different scales may be required to assess habitat use. We used generalized additive models (GAMs) to relate water quality, microhabitat, geographic, and temporal factors to catches of 2 age classes of subadult red drum Sciaenops ocellatus from a 6 yr fishery-independent gill net survey in North Carolina, USA. Age-1 and age-2 red drum were most often caught in shallow, nearshore waters; in some regions, both showed a preference for seagrass. Age-1 red drum were primarily captured at 2 different salin- ity ranges (0 to 5 and 20 to 30 psu), while age-2 red drum abundance was not related to salinity. A smaller-scale analysis of 36 telemetered age-2 red drum in a small tributary of the Neuse River showed a negative response to salinity, a positive response to dissolved oxygen, a dome-shaped response to prey evenness, and a positive response to total prey. Although subadult red drum can tol- erate a wide variety of environmental conditions, our research suggests that they associate with both abiotic and biotic factors in very specific ways. Habitat use patterns of subadult red drum were age-, scale-, and sometimes region-dependent, highlighting the need for examining habitat use patterns of estuarine organisms at multiple life history stages and scales if generalities about how species respond to abiotic and biotic factors are sought.}, journal={MARINE ECOLOGY PROGRESS SERIES}, author={Bacheler, Nathan M. and Paramore, Lee M. and Buckel, Jeffrey A. and Hightower, Joseph E.}, year={2009}, pages={263–277} }
 @article{bacheler_paramore_burdick_buckel_hightower_2009, title={Variation in movement patterns of red drum (Sciaenops ocellatus) inferred from conventional tagging and ultrasonic telemetry}, volume={107}, number={4}, journal={Fishery Bulletin (Washington, D.C.)}, author={Bacheler, N. M. and Paramore, L. M. and Burdick, S. M. and Buckel, J. A. and Hightower, J. E.}, year={2009}, pages={405–419} }
 @article{bacheler_hightower_paramore_buckel_pollock_2008, title={An Age-Dependent Tag Return Model for Estimating Mortality and Selectivity of an Estuarine-Dependent Fish with High Rates of Catch and Release}, volume={137}, ISSN={["1548-8659"]}, DOI={10.1577/T07-146.1}, abstractNote={Abstract}, number={5}, journal={TRANSACTIONS OF THE AMERICAN FISHERIES SOCIETY}, author={Bacheler, Nathan M. and Hightower, Joseph E. and Paramore, Lee M. and Buckel, Jeffrey A. and Pollock, Kenneth H.}, year={2008}, month={Sep}, pages={1422–1432} }
 @article{bacheler_paramore_buckel_scharf_2008, title={Recruitment of juvenile red drum in North Carolina: Spatiotemporal patterns of year-class strength and validation of a seine survey}, volume={28}, ISSN={["1548-8675"]}, DOI={10.1577/M07-144.1}, abstractNote={Abstract}, number={4}, journal={NORTH AMERICAN JOURNAL OF FISHERIES MANAGEMENT}, author={Bacheler, Nathan M. and Paramore, Lee M. and Buckel, Jeffrey A. and Scharf, Frederick S.}, year={2008}, month={Aug}, pages={1086–1098} }
 @article{brennan_leber_blankenship_ransier_debruler_2005, title={An evaluation of coded wire and elastomer tag performance in juvenile common snook under field and laboratory conditions}, volume={25}, ISSN={["1548-8675"]}, DOI={10.1577/M04-003.1}, abstractNote={Abstract}, number={2}, journal={NORTH AMERICAN JOURNAL OF FISHERIES MANAGEMENT}, author={Brennan, NP and Leber, KM and Blankenship, HL and Ransier, JM and DeBruler, R}, year={2005}, month={May}, pages={437–445} }
 @article{neal_bacheler_noble_shea_cope_2005, title={The  mystery of Dos Bocas Reservoir, Puerto Rico: Explaining extreme spatial heterogeneity in largemouth bass distribution}, volume={41}, number={4}, journal={Caribbean Journal of Science}, author={Neal, J. W. and Bacheler, N. M. and Noble, R. L. and Shea, D. and Cope, W. G.}, year={2005}, pages={804–814} }
 @article{bacheler_neal_noble_2004, title={Diet overlap between native bigmouth sleepers (Gobiomorus dormitor) and introduced predatory fishes in a Puerto Rico reservoir}, volume={13}, ISSN={["1600-0633"]}, DOI={10.1111/j.1600-0633.2004.00040.x}, abstractNote={Abstract –  Native fish species coexist with introduced species in Puerto Rico's freshwater systems, yet competition between these species has not been evaluated. We examined the extent of diet overlap between native bigmouth sleepers Gobiomorus dormitor and introduced largemouth bass Micropterus salmoides and peacock bass Cichla ocellaris in a Puerto Rico reservoir. Bigmouth sleepers and largemouth bass exhibited an ontogenetic shift in feeding habits, whereas peacock bass were exclusively piscivorous at all sizes collected in this study. Biologically significant diet overlap was observed between large bigmouth sleepers and largemouth bass, but not between large bigmouth sleepers and peacock bass, or between large largemouth bass and adult peacock bass. No significant diet overlap in any species combination was observed in small or medium size classes. Better understanding of the ecology of these coexisting predators should lead to improved conservation of bigmouth sleepers, and improved fisheries management for all three predatory species.}, number={2}, journal={ECOLOGY OF FRESHWATER FISH}, author={Bacheler, NM and Neal, JW and Noble, RL}, year={2004}, month={Jun}, pages={111–118} }
 @article{bacheler_buckel_2004, title={Does hook type influence the catch rate, size, and injury of grouper in a North Carolina commercial fishery?}, volume={69}, ISSN={["1872-6763"]}, DOI={10.1016/j.fishres.2004.07.001}, abstractNote={Members of the Epinephelinae subfamily of serranids (“grouper”) are heavily exploited by both recreational and commercial hook-and-line fishermen on the continental shelf of the southeastern United States. However, aspects of groupers’ biology and ecology render them extremely vulnerable to overexploitation, including slow growth, late reproduction, large size, and long life span. In addition to direct fishing mortality, hook and release mortalities likely occur when grouper are caught and released, due to injuries sustained from hooking as well as those associated with retrieval from deep waters. Here, we evaluated four hook sizes and styles (5/0 “J”, 7/0 “J”, 9/0 “J”, and 12/0 circle hooks) during the summer of 2003 by their ability to reduce catches of sublegal grouper and non-target species in Onslow Bay, North Carolina, USA. A total of 1249 fish representing 33 species were landed during 20 days of commercial fishing activities. The most common grouper landed were red grouper Epinephelus morio (n = 459), gag grouper Mycteroperca microlepis (n = 55), and scamp grouper Mycteroperca phenax (n = 50). Overall, 6.8% of grouper landed were below the minimum size limit, and the proportion of sublegal grouper caught per day decreased with depth. Catch rates for small grouper (i.e., <50.8 cm fork length), non-target individuals, and sharks varied across hook treatments, while catch rates for large grouper (i.e., ≥50.8 cm fork length) did not. Circle hooks significantly reduced gut hooking in all groupers as well as non-target species. The proportion of grouper and non-target fish that bled varied across hooking locations, with more fish bleeding from gut and gill hooking than jaw hooking. Finally, the proportion of red and gag grouper with distended stomachs was positively related to the water depth in which the fish were caught. These results suggest a tradeoff between fishing in shallow water to reduce depth-related injuries to grouper and fishing in deeper water to minimize the catch of sublegal grouper.}, number={3}, journal={FISHERIES RESEARCH}, author={Bacheler, NM and Buckel, JA}, year={2004}, month={Oct}, pages={303–311} }
 @article{bacheler_neal_noble_2004, title={Reproduction of a landlocked diadromous fish population: Bigmouth sleepers Gobiomorus dormitor in a reservoir in Puerto Rico}, volume={40}, number={2}, journal={Caribbean Journal of Science}, author={Bacheler, N. M. and Neal, J. W. and Noble, R. L.}, year={2004}, pages={223–231} }