Litz, J., M. Baran, R. Carmichael, K. Colegrove, S. Fire, E. Fougeres, R. Hardy, S. Holmes, W. Jones, B. Mase-Guthrie, D. Odell, D. Shannon, J. Saliki, S. Shippee, S. Smith, E. Stratton, S. Bowen-Stevens, M. Tumlin, H. Whitehead, G.A.J. Worthy, S. Venn-Watson, and T. Rowles. 2014. Review of historical unusual mortality events (UMEs) in the Gulf of Mexico (1990-2009): providing context for the multi-year northern Gulf of Mexico cetacean UME declared in 2010. Diseases of Aquatic Organisms 112:161-175. doi:10.3354/dao02807. 2014 Litz et al (DAO)
Browning, N.E., V.C. Cockcroft and G.A.J. Worthy. 2014. Resource partitioning among South African delphinids. Journal of Experimental Marine Biology and Ecology 457:15-21. Browning et al. 2014 (JEMBE)
Browning, N.E., S. McCulloch, G.D. Bossart and G.A.J. Worthy. 2014. Fine-scale population structure of estuarine bottlenose dolphins (Tursiops truncatus) assessed using stable isotope ratios and fatty acid signature analyses. Marine Biology. doi:10.1007/s00227-014-2420-z 2014 Browning et al (Marine Biology)
Hoopes, L.A., L.D. Rea, A. Christ and G.A.J. Worthy. 2014. No evidence of metabolic depression in Western Alaskan juvenile Steller sea lions (Eumetopias jubatus). PLoS ONE 9(1): e85339. doi:10.1371/journal.pone.0085339. Hoopes et al. 2014 (PLOS ONE)
Worthy, G.A.J., T.A.M. Worthy, P.K. Yochem, and C. Dold. 2013. Basal metabolism of an adult male killer whale (Orcinus orca). Marine Mammal Science. First published online: December 5, 2013. doi:10.1111/mms.12091 2013 Worthy et al (MMS)
Browning, N.E., C. Dold, J. I-Fan and G.A.J. Worthy. 2014. Isotope turnover rates and diet-tissue discrimination in skin of ex situ bottlenose dolphins (Tursiops truncatus). Journal of Experimental Biology 217:214-221. doi:10.1242/jeb.093963. 2014 Browning et al (JEB)
Worthy, G.A.J. and T.A.M. Worthy. 2014. Digestive efficiencies of ex situ and in situ West Indian manatees (Trichechus manatus latirostris). Physiological and Biochemical Zoology 87:77-91. 2014 Worthy and Worthy (PBZ) erratum for PBZ
Carmichael, R.H., M. Graham, A. Aven, G.A.J. Worthy and S. Howden. 2012. Were multiple stressors a ‘perfect storm’ for Northern Gulf of Mexico bottlenose dolphins (Tursiops truncatus) in 2011? PLoS One 7(7): e41155. doi:10.1371/journal.pone. PDF available
Witteveen, B.H., G.A.J. Worthy, R.J. Foy, and K.M. Wynne. 2011. Modeling the diet of humpback whales: an approach using stable carbon and nitrogen isotopes in a Bayesian mixing model. Marine Mammal Science: 28:233-250. DOI: 10.1111/j.1748-7692.2011.00508.x PDF available
Witteveen, B.H., G.A.J. Worthy, K.M. Wynne, A.C. Hirons, A.G. Andrews, and R.W. Markel. 2011. Trophic levels of North Pacific humpback whales (Megaptera novaeangliae) through analysis of stable isotopes: implications on prey and resource quality. Aquatic Mammals 37:101-110. PDF available
Worthy, G.A.J., T.A.M. Worthy, N. Browning. 2011. Seasonal variability in the trophic ecology of bottlenose dolphins and their potential prey in the Indian River Lagoon, FL. Part 1. Seasonal variability in the trophic ecology of potential prey of bottlenose dolphins in the Indian River Lagoon, FL. Final Report to Harbor Branch Oceanographic Institute for Project Number: HBOI PO 0012407. PDF available
Worthy, G.A.J., T.A.M. Worthy, N. Browning. 2011. Seasonal variability in the trophic ecology of bottlenose dolphins and their potential prey in the Indian River Lagoon, FL. Part 2. Trophic ecology of bottlenose dolphins in the Indian River Lagoon, FL. Final Report to Harbor Branch Oceanographic Institute for Project Number: HBOI PO 0012407. PDF available
Alves-Stanley, C.D., G.A.J. Worthy and R.K. Bonde. 2010. Feeding preferences of West Indian manatees in Florida, Belize, and Puerto Rico as indicated by stable isotope analysis. Marine Ecology Progress Series 402:255-267. PDF available
Witteveen, B.H., G. A.J. Worthy, and J. Roth. 2009. Using stable carbon and nitrogen isotope ratios to describe migratory movements of breeding North Pacific humpback whales. Marine Ecology Progress Series 393:173-183. PDF available
Alves-Stanley, C.D. and G.A.J. Worthy. 2009. Carbon and nitrogen stable isotope turnover rates and diet-tissue discrimination in Florida manatees (Trichechus manatus latirostris). Journal of Experimental Biology 212:2349-2355. PDF available
Witteveen, B.H., G.A.J. Worthy, K.M. Wynn, and J.D. Roth. 2009. Population structure of North Pacific humpback whales on their feeding grounds revealed by stable carbon and nitrogen isotope ratios. Marine Ecology Progress Series 379:299-310. PDF available
Worthy, G.A.J. 2008. Manatees. World Book Encyclopedia.
Worthy, G. A. J., A.M. Stephens, T.A.M. Worthy. 2008. Feeding ecology of the bottlenose dolphin (Tursiops truncatus) in the Indian River Lagoon, Florida. Final report to the Protect Wild Dolphins License Plate Program Project Number 2003-16. 441 p. PDF available
Reich, K. and G.A.J. Worthy. 2006. An isotopic assessment of the feeding habits of free-ranging manatees. Marine Ecology Progress Series 322:303-309. PDF available
Worthy, G.A.J., Samuel, A.M. and T.A.M. Worthy. 2006. Feeding habits of Indian River Lagoon bottlenose dolphins assessed using stable isotope and fatty acid signature analysis. In: Bossart, G.D., J.D. Goldstein, M.E. Murdoch, P.A. Fair and S.D. McCulloch (eds). Health Assessment of Bottlenose Dolphins in the Indian River Lagoon, Florida and Charleston, South Carolina. Harbor Branch Oceanographic Institution Technical Report No. 93. PDF available
Smith, H.S. and G.A.J. Worthy. 2006. Stratification and intra- and inter-specific differences in fatty acid composition in common dolphin (Delphinus sp.) blubber. Comparative Biochemistry and Physiology, Part B 143: 486-499. PDF available
McFadden, K.M., G.A.J. Worthy, and T. Lacher. 2006. Photogrammetric estimates of size and mass in Hawaiian monk seals (Monachus schauinslandi). Aquatic Mammals 32:31-40. PDF available
Ortiz, R.M. and G.A.J. Worthy. 2006. Body composition and water turnover rates of bottle-fed West Indian manatee (Trichechus manatus) calves. Aquatic Mammals 32:41-45. PDF available
Turner, J.P., L.S. Clark, E.M. Haubold, G.A.J. Worthy, and D.F. Cowan. 2006. Organ weights and growth profiles in bottlenose dolphins, Tursiops truncatus, from the Northwestern Gulf of Mexico. Aquatic Mammals 32:46-57. PDF available
Fertl, D., A.J. Schiro, G.T. Regan, C.A. Beck, N. Adimey, L. Price-May, A. Amos, G.A.J. Worthy, and R. Crossland. 2005. Manatee occurrence in the northern Gulf of Mexico, west of Florida. Gulf and Caribbean Research 17:69-94. PDF available
Samuel, A.M. and G.A.J. Worthy. 2004. Variability in fatty acid composition of bottlenose dolphin (Tursiops truncatus) blubber as a function of body site, season, and reproductive status. Canadian Journal of Zoology 82:1933-1942. PDF available
Ortiz, R.M. and G.A.J. Worthy. 2004. Could lower body fat mass contribute to cold-water susceptibility in calves of the West Indian manatee (Trichechus manatus)? Marine Mammal Science 20:176-183. PDF available
Turner, J.P. and G.A.J. Worthy. 2003. Skull morphometry of bottlenose dolphins (Tursiops truncatus) from the Gulf of Mexico. Journal of Mammalogy 84:665-672. PDF available
Courbis, S.S. and G.A.J. Worthy. 2003. Opportunistic rather than incidental carnivory by Florida manatees (Trichechus manatus latirostris)? Aquatic Mammals 29:104-107. PDF available
Worthy, G.A.J. 2003. A review of “Body composition analysis of animals: A handbook of non-destructive methods.” Ecoscience 10:124.
Stein, J.E., K.L. Tilbury, J.P. Meador, J. Gorzelany, G.A.J. Worthy, and M.M. Krahn. 2003. Ecotoxicologic investigations of bottlenose dolphin (Tursiops truncatus) strandings: Accumulation of persistent organic chemicals and metals. Chapter 17. J. Vos, G. Bossart, M. Fournier, and T. O’Shea (eds.). In: Toxicology of Marine Mammals. CRC Press, Boca Raton FL. 656 p. PDF available
Kurle, C.M. and G.A.J. Worthy. 2002. Variations in stable carbon and nitrogen isotope ratios in northern fur seal (Callorhinus ursinus) tissues: Implications for dietary and migratory reconstructions. Marine Ecology Progress Series 236:289-300. PDF available
Clark, L.S., D.F. Cowan, G.A.J. Worthy, and E.M. Haubold. 2002. An anatomical and pathological examination of the first recorded stranding of a Fraser’s dolphin (Lagenodelphis hosei) in the Northwestern Gulf of Mexico. Gulf of Mexico Science 2002:38-43. PDF available
Williams, T.M. and G.A.J. Worthy. 2002. Anatomy and physiology: The challenge of aquatic performance. Pages 73-97 inMarine Mammal Biology: An Evolutionary Approach. Chapter 3. R. Hoelzel (ed). Blackwell Science Publications, Oxford, UK. 432 p. PDF available
Worthy, G.A.J. 2001. Nutrition and energetics. Pages 791-818 in Handbook of marine mammal medicine. Chapter 36. 2nd Edition. L. Dierauf and F. Gulland (eds.). CRC Press, Boca Raton, FL. 1063 p. PDF available
Kurle, C.M. and G.A.J. Worthy. 2001. Stable isotope assessment of temporal and geographic differences in the feeding ecology of northern fur seals (Callorhinus ursinus) and their prey. Oecologia 126:254-265. PDF available
Worthy, G.A.J., T.A. Miculka, and S.D. Wright. 2000. Manatee response to cold: How cold is too cold? U.S. Fish and Wildlife Service. Florida Manatees and Warm Water: Proceedings of the Warm Water Workshop, Jupiter, FL. August 24-25, 1999. PDF available
Ortiz, R.M., D.S. MacKenzie, and G.A.J. Worthy. 2000. Thyroid hormone concentrations in captive and free-ranging West Indian manatees (Trichechus manatus). Journal of Experimental Biology 203: 3631-3637. PDF available
Wardle, W.J., T.A. Haney, and G.A.J. Worthy. 2000. New host record for the whale louse Isocyamus delphinii (Amphipoda, Cyamidae). Crustaceana 73:639-641. PDF available
Ortiz, R.M. and G.A.J. Worthy. 2000. Effects of capture on adrenal steroid and vasopressin concentrations in free-ranging bottlenose dolphins (Tursiops truncatus). Comparative Biochemistry and Physiology 125A: 317-324. PDF available
Wilkinson, D. and G.A.J. Worthy. 1999. Marine Mammal Stranding Networks. Pages 396-411 in Conservation and Management of Marine Mammals. Volume 2. Twiss, J.R. and R.R. Reeves (eds.). Smithsonian Institution Press. Washington DC. 496 p. PDF available
Meador, J.P., D. Ernest, A.A. Hohn, K. Tilbury, J. Gorzelany, G.A.J. Worthy, and J.E. Stein. 1999. Comparison of elements in bottlenose dolphins stranded on the beaches of Texas and Florida in the Gulf of Mexico over a one-year period. Archives of Environmental Contaminants and Toxicology 36: 87-98. PDF available
Ortiz, R. M., G.A.J. Worthy, and F.M. Byers. 1999. Estimation of water turnover rates of captive West Indian manatees (Trichechus manatus) held in fresh and salt water. Journal of Experimental Biology 202:33-38. PDF available
Worthy, G.A.J. 1998. Patterns of bottlenose dolphin (Tursiops truncatus) strandings in Texas. Pages 47-55 in NOAA Technical Report 143, Characteristics and causes of Texas strandings, R. Zimmerman (ed.). National Marine Fisheries Service. PDF available
Ortiz, R.M., G.A.J. Worthy, and D.S. MacKenzie. 1998. Osmoregulation in wild and captive West Indian manatees (Trichechus manatus). Physiological Zoology 71: 449-457. PDF available
Fertl, D., A.J. Schiro, S. Collier, and G.A.J. Worthy. 1997. Stranding of a Cuvier’s beaked whale (Ziphius cavirostris) in southern Texas, with comments on stomach contents. Gulf of Mexico Science 1997: 92-93. PDF available
Davis, R.W., G.A.J. Worthy, B. Würsig, and S.K. Lynn. 1996. Diving behavior and at-sea movements of an Atlantic spotted dolphin (Stenella frontalis). Marine Mammal Science 12:569-581. PDF available
Lipscomb, T.P., S. Kennedy, D. Moffett, A. Krafft, B.A. Klaunburg, J.H. Lichy, G.T. Regan, G.A.J. Worthy, and J.K. Taubenberger. 1996. Morbilliviral epizootic in bottlenose dolphins of the Gulf of Mexico. Journal of Veterinary Diagnostic Medicine 8:283-290. PDF available
Gales, R., D. Renouf and G.A.J. Worthy. 1994. Use of bioelectrical impedance analysis to assess body composition of seals. Marine Mammal Science.10:1-12. PDF available
Stern S.J. Hoelzel, A.R. and Worthy, G.A.J. 1993. Non-lethal Alternatives to the Norwegian Proposal. Reports of the International Whaling Commission 43: 189-191.
Bossart, G., D. Busbee, G. Lahvis and G.A.J. Worthy. 1993. Research perspectives for dolphin mortalities in North America. U.S. E.P.A. Report No. EPA/600/R-93/217.
Worthy, G.A.J., D. Casper, H. Rhinehart and M. Moser. 1993. First record of a live-stranded pantropical spotted dolphin (Stenella attenuata graffmanni) in central California, USA. Marine Mammal Science 9:316-319. PDF available
Worthy, G.A.J., P.A. Morris, D.P. Costa and B.J. Le Boeuf. 1992. Moult energetics of the northern elephant seal. Journal of Zoology, London 227:257-265. PDF available
Worthy, G.A.J. 1991. Insulation and thermal balance of fasting harp and grey seal pups. Comparative Biochemistry and Physiology 100A:845-851. PDF available
Innes, S., G.A.J. Worthy, D.M. Lavigne and K. Ronald. 1990. Surface areas of phocid seals. Canadian Journal of Zoology 68:2531-2538. PDF available
Lavigne, D.M., S. Innes, G.A.J. Worthy and E.F. Edwards. 1990. Lower critical temperatures of blue whales, Balaenoptera musculus. Journal of theoretical Biology 144:249-257. PDF available
Worthy, G.A.J., P.A. Morris, D.P. Costa and B.J. Le Boeuf. 1990. Molt energetics of the northern elephant seal. Physiologist 33:A87.
Worthy, G.A.J. 1990. Nutritional energetics for marine mammals. Pages 489-520 in Handbook of marine mammal medicine: Health, disease and rehabilitation. L. Dierauf (ed.). CRC Press, Boca Raton, FL. 735 pp.
Fadely, B.S., G.A.J. Worthy and D.P. Costa. 1990. Assimilation efficiency of marine mammals determined using dietary manganese. Journal of Wildlife Management 54:246-251. PDF available
Worthy, G.A.J. and E.F. Edwards. 1990. Morphometric and biochemical factors affecting heat loss in a small temperate cetacean (Phocoena phocoena) and a small tropical cetacean (Stenella attenuata). Physiological Zoology 63:432-442. PDF available
Worthy, G.A.J. and D.P. Costa. 1989. Seasonal and annual trends in body condition of California sea lions. Proceedings of the Fifth Biennial Mugu Lagoon/San Nicolas Island Ecological Research Symposium. 198 p.
Worthy, G.A.J, J. Rose and F. Stormshak. 1988. Anatomy and physiology of fur growth: The pelage priming process. Pages 827-841 in Wild Furbearer Management and Conservation in North America. M. Novak, J.A. Baker, M.E. Obbard and B. Malloch (eds.). Ontario Trappers Association, North Bay, Ontario. 1168 pp. PDF available
Worthy, G.A.J. 1987. Ecological energetics of harp and grey seals: Implications from a simulation model. Pages 227- 246 inApproaches to Marine Mammal Energetics. A.C. Huntley, D.P. Costa, G.A.J. Worthy and M.A. Castellini (eds.). The Society for Marine Mammalogy, Special Publication Number 1. 253 pp. PDF available
Worthy, G.A.J., S. Innes, B.M. Braune and R.E.A. Stewart. 1987. Rapid acclimation of cetaceans to an open-system respirometer. Pages 113-124 in Approaches to Marine Mammal Energetics. A.C. Huntley, D.P. Costa, G.A.J. Worthy and M.A. Castellini (eds.). The Society for Marine Mammalogy, Special Publication Number 1. 253 pp. PDF available
Huntley, A.C., D.P. Costa, G.A.J. Worthy and M.A. Castellini (eds.). 1987. Approaches to Marine Mammal Energetics. The Society for Marine Mammalogy, Special Publication Number 1. 253 p.
Worthy, G.A.J. 1987. Metabolism and growth of young harp and grey seals. Canadian Journal of Zoology 65:1377-1382. PDF available
Worthy, G.A.J. and D.M. Lavigne. 1987. Mass and energy utilization by harp and grey seal pups during the post- weaning fast. Physiological Zoology 60:352-364. PDF available
Hicks, B. and G.A.J. Worthy. 1987. Seal pox in young grey seals (Halichoerus grypus) and their handlers. Journal of Wildlife Diseases 23:1-6. PDF available
Lavigne, D.M., S. Innes, G.A.J. Worthy and K.M. Kovacs. 1986. Metabolic rate – body size relations in marine mammals. Journal of Theoretical Biology 122:123-124. PDF available
Worthy, G.A.J. and J.P. Hickie. 1986. Relative brain size in marine mammals. American Naturalist 128:445-459. PDF available
Lavigne, D.M., S. Innes, G.A.J. Worthy, K.M. Kovacs, O.J. Schmitz and J.P. Hickie. 1986. Metabolic rates of seals and whales. Canadian Journal of Zoology 64:279-284. PDF available
Lavigne, D.M., S. Innes, R.E.A. Stewart and G.A.J. Worthy. 1985. An annual energy budget for Northwest Atlantic harp seals. Pages 319-336 in Interactions Between Marine Mammals and Fisheries. J.R. Beddington, R.J.H. Beverton and D.M. Lavigne (eds.). George Allen and Unwin Publishers, London. 343 pp.
Worthy, G.A.J. and D.M. Lavigne. 1983. Energetics of fasting and subsequent growth in weaned harp seal pups, Phoca groenlandica. Canadian Journal of Zoology 61:447-456. PDF available
Worthy, G.A.J. and D.M. Lavigne. 1983. Changes in energy stores during neonatal development in the harp seal, Phoca groenlandica. Journal of Mammalogy 64:89-96. PDF available
Worthy, G.A.J. and D.M. Lavigne. 1982. Changes in blood properties of fasting and feeding harp seal pups, Phoca groenlandica, after weaning. Canadian Journal of Zoology 60:586-592. PDF available
Bailey, B.A., R.G.H. Downer, D.M. Lavigne, G. Drolet and G.A.J. Worthy. 1981. Changes in fatty acid composition of plasma of the harp seal, Pagophilus groenlandicus, during the post-weaning fast. Comparative Biochemistry and Physiology 70B:795-798. PDF available