James L Bodkin (Former Employee)
Science and Products
Filter Total Items: 141
Studying sea otter foraging ecology: A review of some methodological approaches Studying sea otter foraging ecology: A review of some methodological approaches
The study of foraging ecology plays a central role in our understanding of animal populations and natural communities, and can also provide information necessary for the effective conservation of rare or endangered species. Sea otter researchers are interested in foraging ecology for many different reasons, but for heuristic purposes we identify three general types of research questions...
Authors
M. T. Tinker, J. A. Estes, James L. Bodkin, M. M. Staedler, Daniel H. Monson
Status of sea otter populations in southcentral and southeast Alaska, 2002-2003 Status of sea otter populations in southcentral and southeast Alaska, 2002-2003
During the years 2002-2004 estimated sea otter population sizes were calculated for Southeast Alaska, Prince William Sound, and the Kenai Peninsula and Cook Inlet regions of Alaska. Aerial surveys were conducted by a single observer from a float-equipped Bellanca Scout fixed-wing aircraft flying at 91 m altitude and 65 mph. The surveys followed protocols written by Bodkin and Udevitz...
Authors
James L. Bodkin
Sea otter research methods and tools Sea otter research methods and tools
Sea otters possess physical characteristics and life history attributes that provide both opportunity and constraint to their study. Because of their relatively limited diving ability they occur in nearshore marine habitats that are usually viewable from shore, allowing direct observation of most behaviors. Because sea otters live nearshore and forage on benthic invertebrates, foraging...
Authors
James L. Bodkin
Population demographics, survival, and reporduction: Alaska sea otter research Population demographics, survival, and reporduction: Alaska sea otter research
The fundamental force behind population change is the balance between age-specific survival and reproductive rates. Thus, understanding population demographics is crucial when trying to interpret trends in population change over time. For many species, demographic rates change as the population’s status (i.e., relative to prey resources) varies. Indices of body condition indicative of...
Authors
Daniel H. Monson, James L. Bodkin, D.F. Doak, James A. Estes, M. T. Tinker, D.B. Siniff
Sea otter studies in Glacier Bay National Park and Preserve Sea otter studies in Glacier Bay National Park and Preserve
No abstract available.
Authors
James L. Bodkin, Brenda E. Ballachey, Kimberly A. Kloecker, George G. Esslinger, Daniel H. Monson, H.A. Coletti, James A. Estes
Foraging depths of sea otters and implications to coastal marine communities Foraging depths of sea otters and implications to coastal marine communities
We visually observed 1,251 dives, of 14 sea otters instrumented with TDRs in southeast Alaska, and used attribute values from observed dives to classify 180,848 recorded dives as foraging (0.64), or traveling (0.36). Foraging dives were significantly deeper, with longer durations, bottom times, and postdive surface intervals, and greater descent and ascent rates, compared to traveling...
Authors
James L. Bodkin, George G. Esslinger, Daniel H. Monson
Correlates to survival of juvenile sea otters in Prince William Sound, Alaska, 1992-1993 Correlates to survival of juvenile sea otters in Prince William Sound, Alaska, 1992-1993
We estimated survival of sea otters (Enhydra lutris) for 1 year post weaning during 1992-1993 in Prince William Sound (PWS), location of the 1989 Exxon Valdez oil spill. We sampled 38 pups in eastern PWS (EPWS), an unoiled area occupied by sea otters for
Authors
Brenda E. Ballachey, James L. Bodkin, S. Howlin, A. M. Doroff, A.H. Rebar
Sea otter studies in Glacier Bay National Park and Preserve: annual report 2002 Sea otter studies in Glacier Bay National Park and Preserve: annual report 2002
Since 1995, the number of sea otters in Glacier Bay proper has increased from around 5 to more than 1200. Sea otter distribution is mostly limited to the Lower Bay, south of Sandy Cove, and is not continuous within that area. Concentrations occur in the vicinity of Sita Reef and Boulder Island and between Pt. Carolus and Rush Pt. on the west side of the Bay, although there have been...
Authors
James L. Bodkin, Kimberly A. Kloecker, George G. Esslinger, Daniel H. Monson, Heather A. Coletti, Janet Doherty
Correlates to survival of juvenile sea otters in Prince William Sound, Alaska, 1992-1993 Correlates to survival of juvenile sea otters in Prince William Sound, Alaska, 1992-1993
We estimated survival of sea otters (Enhydra lutris) for 1 year post weaning during 1992-1993 in Prince William Sound (PWS), location of the 1989 Exxon Valdez oil spill. We sampled 38 pups in eastern PWS (EPWS), an unoiled area occupied by sea otters for
Authors
Brenda E. Ballachey, James L. Bodkin, S. Howlin, A. M. Doroff, A.H. Rebar
Ecology of selected marine communities in Glacier Bay: Zooplankton, forage fish, seabirds and marine mammals Ecology of selected marine communities in Glacier Bay: Zooplankton, forage fish, seabirds and marine mammals
We studied oceanography (including primary production), secondary production, small schooling fish (SSF), and marine bird and mammal predators in Glacier Bay during 1999 and 2000. Results from these field efforts were combined with a review of current literature relating to the Glacier Bay environment. Since the conceptual model developed by Hale and Wright (1979) ‘changes and cycles’...
Authors
Martin D. Robards, Gary S. Drew, John F. Piatt, Jennifer Marie Anson, Alisa A. Abookire, James L. Bodkin, Philip N. Hooge, Suzann G. Speckman
Return to Glacier Bay Return to Glacier Bay
Seven species of pigeons and doves were cultured for yeasts in the upper digestive tract. The following list gives the isolation rate for each columbid species and the yeasts cultured from them: feral pigeon Columba Livia (Gmelin) 95% -Candida albicans (Robin) Berkhout, C. tropicalis (Castellani) Berkhout, C. krusei (Cast.) Berkhout, C. guilliermondii (Cast.) Langeron et Guerra...
Authors
James L. Bodkin
Science and Products
Filter Total Items: 141
Studying sea otter foraging ecology: A review of some methodological approaches Studying sea otter foraging ecology: A review of some methodological approaches
The study of foraging ecology plays a central role in our understanding of animal populations and natural communities, and can also provide information necessary for the effective conservation of rare or endangered species. Sea otter researchers are interested in foraging ecology for many different reasons, but for heuristic purposes we identify three general types of research questions...
Authors
M. T. Tinker, J. A. Estes, James L. Bodkin, M. M. Staedler, Daniel H. Monson
Status of sea otter populations in southcentral and southeast Alaska, 2002-2003 Status of sea otter populations in southcentral and southeast Alaska, 2002-2003
During the years 2002-2004 estimated sea otter population sizes were calculated for Southeast Alaska, Prince William Sound, and the Kenai Peninsula and Cook Inlet regions of Alaska. Aerial surveys were conducted by a single observer from a float-equipped Bellanca Scout fixed-wing aircraft flying at 91 m altitude and 65 mph. The surveys followed protocols written by Bodkin and Udevitz...
Authors
James L. Bodkin
Sea otter research methods and tools Sea otter research methods and tools
Sea otters possess physical characteristics and life history attributes that provide both opportunity and constraint to their study. Because of their relatively limited diving ability they occur in nearshore marine habitats that are usually viewable from shore, allowing direct observation of most behaviors. Because sea otters live nearshore and forage on benthic invertebrates, foraging...
Authors
James L. Bodkin
Population demographics, survival, and reporduction: Alaska sea otter research Population demographics, survival, and reporduction: Alaska sea otter research
The fundamental force behind population change is the balance between age-specific survival and reproductive rates. Thus, understanding population demographics is crucial when trying to interpret trends in population change over time. For many species, demographic rates change as the population’s status (i.e., relative to prey resources) varies. Indices of body condition indicative of...
Authors
Daniel H. Monson, James L. Bodkin, D.F. Doak, James A. Estes, M. T. Tinker, D.B. Siniff
Sea otter studies in Glacier Bay National Park and Preserve Sea otter studies in Glacier Bay National Park and Preserve
No abstract available.
Authors
James L. Bodkin, Brenda E. Ballachey, Kimberly A. Kloecker, George G. Esslinger, Daniel H. Monson, H.A. Coletti, James A. Estes
Foraging depths of sea otters and implications to coastal marine communities Foraging depths of sea otters and implications to coastal marine communities
We visually observed 1,251 dives, of 14 sea otters instrumented with TDRs in southeast Alaska, and used attribute values from observed dives to classify 180,848 recorded dives as foraging (0.64), or traveling (0.36). Foraging dives were significantly deeper, with longer durations, bottom times, and postdive surface intervals, and greater descent and ascent rates, compared to traveling...
Authors
James L. Bodkin, George G. Esslinger, Daniel H. Monson
Correlates to survival of juvenile sea otters in Prince William Sound, Alaska, 1992-1993 Correlates to survival of juvenile sea otters in Prince William Sound, Alaska, 1992-1993
We estimated survival of sea otters (Enhydra lutris) for 1 year post weaning during 1992-1993 in Prince William Sound (PWS), location of the 1989 Exxon Valdez oil spill. We sampled 38 pups in eastern PWS (EPWS), an unoiled area occupied by sea otters for
Authors
Brenda E. Ballachey, James L. Bodkin, S. Howlin, A. M. Doroff, A.H. Rebar
Sea otter studies in Glacier Bay National Park and Preserve: annual report 2002 Sea otter studies in Glacier Bay National Park and Preserve: annual report 2002
Since 1995, the number of sea otters in Glacier Bay proper has increased from around 5 to more than 1200. Sea otter distribution is mostly limited to the Lower Bay, south of Sandy Cove, and is not continuous within that area. Concentrations occur in the vicinity of Sita Reef and Boulder Island and between Pt. Carolus and Rush Pt. on the west side of the Bay, although there have been...
Authors
James L. Bodkin, Kimberly A. Kloecker, George G. Esslinger, Daniel H. Monson, Heather A. Coletti, Janet Doherty
Correlates to survival of juvenile sea otters in Prince William Sound, Alaska, 1992-1993 Correlates to survival of juvenile sea otters in Prince William Sound, Alaska, 1992-1993
We estimated survival of sea otters (Enhydra lutris) for 1 year post weaning during 1992-1993 in Prince William Sound (PWS), location of the 1989 Exxon Valdez oil spill. We sampled 38 pups in eastern PWS (EPWS), an unoiled area occupied by sea otters for
Authors
Brenda E. Ballachey, James L. Bodkin, S. Howlin, A. M. Doroff, A.H. Rebar
Ecology of selected marine communities in Glacier Bay: Zooplankton, forage fish, seabirds and marine mammals Ecology of selected marine communities in Glacier Bay: Zooplankton, forage fish, seabirds and marine mammals
We studied oceanography (including primary production), secondary production, small schooling fish (SSF), and marine bird and mammal predators in Glacier Bay during 1999 and 2000. Results from these field efforts were combined with a review of current literature relating to the Glacier Bay environment. Since the conceptual model developed by Hale and Wright (1979) ‘changes and cycles’...
Authors
Martin D. Robards, Gary S. Drew, John F. Piatt, Jennifer Marie Anson, Alisa A. Abookire, James L. Bodkin, Philip N. Hooge, Suzann G. Speckman
Return to Glacier Bay Return to Glacier Bay
Seven species of pigeons and doves were cultured for yeasts in the upper digestive tract. The following list gives the isolation rate for each columbid species and the yeasts cultured from them: feral pigeon Columba Livia (Gmelin) 95% -Candida albicans (Robin) Berkhout, C. tropicalis (Castellani) Berkhout, C. krusei (Cast.) Berkhout, C. guilliermondii (Cast.) Langeron et Guerra...
Authors
James L. Bodkin
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