Thomas O'Shea, PhD (Former Employee)
Science and Products
Filter Total Items: 116
Regional brain morphometry and lissencephaly in the Sirenia Regional brain morphometry and lissencephaly in the Sirenia
Neuroanatomical structure was examined in the brains of West Indian manatees (Trichechus manatus) using computer-based morphometric methods. Although manatees have a small relative brain size, volume estimates of the major brain regions indicate that the telencephalon comprises 71% of totalbrain volume and is 90% cerebral cortex. These values are comparable to those seen among a...
Authors
Roger L. Reep, Thomas J. O’Shea
Encephalization quotients and life-history traits in the Sirenia Encephalization quotients and life-history traits in the Sirenia
Relative brain size in the Sirenia is unusually small. Encephalization quotients are 0.27 for Florida manatees (Trichechus manatus) and 0.38 for dugongs (Dugong dugon). Estimates for Steller's sea cow (Hydrodamalis gigas) range from 0.12 to 0.19. These values are among the lowest known for Recent mammals, and seemingly have changed little since the Eocene. A body plan specialized for the...
Authors
T. J. O'Shea, R.L. Reep
An evaluation of bone growth- layer counts as an age-determination technique in Florida manatees An evaluation of bone growth- layer counts as an age-determination technique in Florida manatees
Abstract not supplied at this time
Authors
M. Marmontel, T. J. O'Shea, S.R. Humphrey
Florida manatees: distribution, geographically referenced data sets, and ecological and behavioral aspects of habitat use Florida manatees: distribution, geographically referenced data sets, and ecological and behavioral aspects of habitat use
Abstract not supplied at this time
Authors
T. J. O'Shea, H. I. Kochman
Three years operational use of satellite transmitters on Florida manatees: tag improvements based on challenges from the field Three years operational use of satellite transmitters on Florida manatees: tag improvements based on challenges from the field
No abstract available.
Authors
J.P. Reid, T. J. O'Shea
Sowerby's beaked whale (Mesoplodon bidens) in the Gulf of Mexico Sowerby's beaked whale (Mesoplodon bidens) in the Gulf of Mexico
No abstract available.
Authors
Robert K. Bonde, Thomas J. O'Shea
Distribution, status, and biogeography of the West Indian manatee Distribution, status, and biogeography of the West Indian manatee
No abstract available.
Authors
L.W. Lefebvre, T. J. O'Shea, G. B. Rathbun, R.C. Best
Genetic variability in the Florida manatee (Trichechus manatus) Genetic variability in the Florida manatee (Trichechus manatus)
Tissue was obtained from 59 manatee (Trichechus manatus) carcasses salvaged from 20 counties in Florida. Allozyme phenotypes at 24 structural loci were determined by gel electrophoresis. Averages for the proportion of polymorphic loci and mean heterozygosity were 0.300 (range, 0.167-0.417) and 0.050 (range, 0.028-0.063), respectively. These estimates are equivalent to or higher than...
Authors
Leroy R. McClenaghan, Thomas J. O'Shea
The past, present, and future of manatees in the southeastern United States: realities, misunderstandings and enigmas The past, present, and future of manatees in the southeastern United States: realities, misunderstandings and enigmas
A review of the historical and recent (1970s-1980s) literature on the distribution, abundance, and mortality of West Indian manatees (Trichechus manatus) in the southern United States is presented. Recent unpublished data on mortality, Florida boat registrations, size of certain manatee wintering populations, and records outside of Florida are also given. Manatees never regularly...
Authors
T. J. O'Shea
Distribution, status, and traditional significance of the West Indian manatee Trichechus manatus in Venezuela Distribution, status, and traditional significance of the West Indian manatee Trichechus manatus in Venezuela
Aerial and interview surveys were conducted in 1986 to determine the current distribution, status, and traditional significance of the West Indian manatee Trichechus manatus in Venezuela. Aerial surveys provided just eight tentative sightings in 73 hours of searching. These discouraging results may have been due to poor visibility, small populations, and perhaps reduced dry season...
Authors
Thomas J. O'Shea, Martin Correa-Viana, Mark E. Ludlow, John G. Robinson
Mast foraging by West Indian manatees (Trichechus manatus) Mast foraging by West Indian manatees (Trichechus manatus)
No abstract available.
Authors
Thomas J. O'Shea
Non-USGS Publications**
Helm, R.C., D.P. Costa, T.D. DeBruyn, T.J. O'Shea, R.S. Wells, and T.M. Williams. 2015. Overview of effects of oil on marine mammals. P. 455-484, in M. Fingas (ed.) Handbook of Oil Spill Science and Technology. John Wiley & Sons, Inc., Hoboken, NJ
Luis, A.D., T.J. O'Shea, D.T.S. Hayman, J.L.N. Wood, A.A. Cunningham, A. T. Gilbert, J.N. Mills, and C.T. Webb. 2015. Network analysis of host-virus communities in bats and rodents reveals determinants of cross-species transmission. Ecology Letters 18:1153-1162. DOI: 10.1111/ele.12491
Marsh, H., T. O’Shea, and J. Reynolds. 2011. Ecology and conservation of the Sirenia: dugongs and manatees. Cambridge University Press, Cambridge, UK. 538 p.
O’Shea, T.J. 2014. Family Trichechidae. P. 548-562 in D.E. Wilson and R.A. Mittermeier, eds. Handbook of Mammals of the World 4. Sea Mammals. Lynx Editions, Barcelona.
Peel, A.J., J. R. C. Pulliam, A. D. Luis, R. K. Plowright, T. J. O’Shea, D. T. S. Hayman, J. L. N. Wood, C. T. Webb, and O. Restif. 2014. The effect of seasonal birth pulses on pathogen persistence in wild mammal populations. Proceedings of the Royal Society B-Biological Sciences B 281: 20132962 (pages 1-9).
Restif, O., Hayman, D.T.S., J.R.C. Pulliam, R.K. Plowright, D.B. George, A.D. Luis, A.A. Cunningham, R.A. Bowen, A.R. Fooks, T.J. O'Shea, J.L.N. Wood, and C.T. Webb. 2012. Model-guided fieldwork: practical guidelines for multidisciplinary research on wildlife ecological and epidemiological dynamics. Ecology Letters 15:1083-1094. DOI: 10.1111/j.1461-0248.2012.01836.x
Son, N.T., T.J. O’Shea, J.A. Gore, G. Csorba, V.T. Tu, T. Oshida, H. Endo, and M. Motokawa. 2016. Bats (Mammalia: Chiroptera) of the southeastern Truong Son Mountains, Quang Ngai Province, Vietnam. Journal of Threatened Taxa 8:8953-8969. DOI: httpdx.dofi.org/10.11609/jot.2785.8.7.8953-8969
Webber, Q.M.R., Brigham, R.M., Park, A.D., Gillam, E.H., O'Shea, T.J., and Willis, C.K.R. 2016, Social network characteristics and predicted pathogen transmission in summer colonies of female big brown bats (Eptesicus fuscus). Behavioral Ecology and Sociobiology 70: 701-712. DOI: 10.1007/s00265-016-2093-3
Woolf, A. and T. J. O'Shea. 1968. Two bighorn sheep-coyote encounters. Journal of Mammalogy 49: 770. DOI: 10.2307/1378747
Woolf, A., T. J. O'Shea and D. L. Gilbert. 1970. Movements and behavior of bighorn sheep on summer ranges in Yellowstone National Park. Journal of Wildlife Management 34: 446-450. DOI: 10.2307/3799031
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Filter Total Items: 116
Regional brain morphometry and lissencephaly in the Sirenia Regional brain morphometry and lissencephaly in the Sirenia
Neuroanatomical structure was examined in the brains of West Indian manatees (Trichechus manatus) using computer-based morphometric methods. Although manatees have a small relative brain size, volume estimates of the major brain regions indicate that the telencephalon comprises 71% of totalbrain volume and is 90% cerebral cortex. These values are comparable to those seen among a...
Authors
Roger L. Reep, Thomas J. O’Shea
Encephalization quotients and life-history traits in the Sirenia Encephalization quotients and life-history traits in the Sirenia
Relative brain size in the Sirenia is unusually small. Encephalization quotients are 0.27 for Florida manatees (Trichechus manatus) and 0.38 for dugongs (Dugong dugon). Estimates for Steller's sea cow (Hydrodamalis gigas) range from 0.12 to 0.19. These values are among the lowest known for Recent mammals, and seemingly have changed little since the Eocene. A body plan specialized for the...
Authors
T. J. O'Shea, R.L. Reep
An evaluation of bone growth- layer counts as an age-determination technique in Florida manatees An evaluation of bone growth- layer counts as an age-determination technique in Florida manatees
Abstract not supplied at this time
Authors
M. Marmontel, T. J. O'Shea, S.R. Humphrey
Florida manatees: distribution, geographically referenced data sets, and ecological and behavioral aspects of habitat use Florida manatees: distribution, geographically referenced data sets, and ecological and behavioral aspects of habitat use
Abstract not supplied at this time
Authors
T. J. O'Shea, H. I. Kochman
Three years operational use of satellite transmitters on Florida manatees: tag improvements based on challenges from the field Three years operational use of satellite transmitters on Florida manatees: tag improvements based on challenges from the field
No abstract available.
Authors
J.P. Reid, T. J. O'Shea
Sowerby's beaked whale (Mesoplodon bidens) in the Gulf of Mexico Sowerby's beaked whale (Mesoplodon bidens) in the Gulf of Mexico
No abstract available.
Authors
Robert K. Bonde, Thomas J. O'Shea
Distribution, status, and biogeography of the West Indian manatee Distribution, status, and biogeography of the West Indian manatee
No abstract available.
Authors
L.W. Lefebvre, T. J. O'Shea, G. B. Rathbun, R.C. Best
Genetic variability in the Florida manatee (Trichechus manatus) Genetic variability in the Florida manatee (Trichechus manatus)
Tissue was obtained from 59 manatee (Trichechus manatus) carcasses salvaged from 20 counties in Florida. Allozyme phenotypes at 24 structural loci were determined by gel electrophoresis. Averages for the proportion of polymorphic loci and mean heterozygosity were 0.300 (range, 0.167-0.417) and 0.050 (range, 0.028-0.063), respectively. These estimates are equivalent to or higher than...
Authors
Leroy R. McClenaghan, Thomas J. O'Shea
The past, present, and future of manatees in the southeastern United States: realities, misunderstandings and enigmas The past, present, and future of manatees in the southeastern United States: realities, misunderstandings and enigmas
A review of the historical and recent (1970s-1980s) literature on the distribution, abundance, and mortality of West Indian manatees (Trichechus manatus) in the southern United States is presented. Recent unpublished data on mortality, Florida boat registrations, size of certain manatee wintering populations, and records outside of Florida are also given. Manatees never regularly...
Authors
T. J. O'Shea
Distribution, status, and traditional significance of the West Indian manatee Trichechus manatus in Venezuela Distribution, status, and traditional significance of the West Indian manatee Trichechus manatus in Venezuela
Aerial and interview surveys were conducted in 1986 to determine the current distribution, status, and traditional significance of the West Indian manatee Trichechus manatus in Venezuela. Aerial surveys provided just eight tentative sightings in 73 hours of searching. These discouraging results may have been due to poor visibility, small populations, and perhaps reduced dry season...
Authors
Thomas J. O'Shea, Martin Correa-Viana, Mark E. Ludlow, John G. Robinson
Mast foraging by West Indian manatees (Trichechus manatus) Mast foraging by West Indian manatees (Trichechus manatus)
No abstract available.
Authors
Thomas J. O'Shea
Non-USGS Publications**
Helm, R.C., D.P. Costa, T.D. DeBruyn, T.J. O'Shea, R.S. Wells, and T.M. Williams. 2015. Overview of effects of oil on marine mammals. P. 455-484, in M. Fingas (ed.) Handbook of Oil Spill Science and Technology. John Wiley & Sons, Inc., Hoboken, NJ
Luis, A.D., T.J. O'Shea, D.T.S. Hayman, J.L.N. Wood, A.A. Cunningham, A. T. Gilbert, J.N. Mills, and C.T. Webb. 2015. Network analysis of host-virus communities in bats and rodents reveals determinants of cross-species transmission. Ecology Letters 18:1153-1162. DOI: 10.1111/ele.12491
Marsh, H., T. O’Shea, and J. Reynolds. 2011. Ecology and conservation of the Sirenia: dugongs and manatees. Cambridge University Press, Cambridge, UK. 538 p.
O’Shea, T.J. 2014. Family Trichechidae. P. 548-562 in D.E. Wilson and R.A. Mittermeier, eds. Handbook of Mammals of the World 4. Sea Mammals. Lynx Editions, Barcelona.
Peel, A.J., J. R. C. Pulliam, A. D. Luis, R. K. Plowright, T. J. O’Shea, D. T. S. Hayman, J. L. N. Wood, C. T. Webb, and O. Restif. 2014. The effect of seasonal birth pulses on pathogen persistence in wild mammal populations. Proceedings of the Royal Society B-Biological Sciences B 281: 20132962 (pages 1-9).
Restif, O., Hayman, D.T.S., J.R.C. Pulliam, R.K. Plowright, D.B. George, A.D. Luis, A.A. Cunningham, R.A. Bowen, A.R. Fooks, T.J. O'Shea, J.L.N. Wood, and C.T. Webb. 2012. Model-guided fieldwork: practical guidelines for multidisciplinary research on wildlife ecological and epidemiological dynamics. Ecology Letters 15:1083-1094. DOI: 10.1111/j.1461-0248.2012.01836.x
Son, N.T., T.J. O’Shea, J.A. Gore, G. Csorba, V.T. Tu, T. Oshida, H. Endo, and M. Motokawa. 2016. Bats (Mammalia: Chiroptera) of the southeastern Truong Son Mountains, Quang Ngai Province, Vietnam. Journal of Threatened Taxa 8:8953-8969. DOI: httpdx.dofi.org/10.11609/jot.2785.8.7.8953-8969
Webber, Q.M.R., Brigham, R.M., Park, A.D., Gillam, E.H., O'Shea, T.J., and Willis, C.K.R. 2016, Social network characteristics and predicted pathogen transmission in summer colonies of female big brown bats (Eptesicus fuscus). Behavioral Ecology and Sociobiology 70: 701-712. DOI: 10.1007/s00265-016-2093-3
Woolf, A. and T. J. O'Shea. 1968. Two bighorn sheep-coyote encounters. Journal of Mammalogy 49: 770. DOI: 10.2307/1378747
Woolf, A., T. J. O'Shea and D. L. Gilbert. 1970. Movements and behavior of bighorn sheep on summer ranges in Yellowstone National Park. Journal of Wildlife Management 34: 446-450. DOI: 10.2307/3799031
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government