Howard Kochman
Howard Kochman is a scientist and a member of the IT Team at the USGS Wetland and Aquatic Research Center.
Science and Products
Filter Total Items: 13
Model description and evaluation of the mark-recapture survival model used to parameterize the 2012 status and threats analysis for the Florida manatee (Trichechus manatus latirostris)
This report provides supporting details and evidence for the rationale, validity and efficacy of a new mark-recapture model, the Barker Robust Design, to estimate regional manatee survival rates used to parameterize several components of the 2012 version of the Manatee Core Biological Model (CBM) and Threats Analysis (TA). The CBM and TA provide scientific analyses on population viability of the
Authors
Catherine A. Langtimm, William L. Kendall, Cathy A. Beck, Howard I. Kochman, Amy L. Teague, Gaia Meigs-Friend, Claudia L. Peñaloza
Seasonal movements, migratory behavior, and site fidelity of West Indian manatees along the Atlantic coast of the United States
The West Indian manatee (Trichechus manatus) is endangered by human activities throughout its range, including the U.S. Atlantic coast where habitat degradation from coastal development and manatee deaths from watercraft collisions have been particularly severe. We radio-tagged and tracked 78 manatees along the east coast of Florida and Georgia over a 12-year period (1986-1998). Our goals were to
Authors
C. J. Deutsch, J. P. Reid, R. K. Bonde, Dean E. Easton, H. I. Kochman, T. J. O'Shea
Manatee response to boating activity in a thermal refuge
Thermal refuges are important for the endangered Florida manatee (Trichechus manatus latirostris) during winter cold periods in temperate latitudes. However, little research has examined impacts on manatees from human disturbance during these critical periods. We studied the effect of recreational boating activity on manatee use of established sanctuaries in the natural thermal refuge created by w
Authors
C.A. Buckingham, L.W. Lefebvre, J.M. Schaefer, H. I. Kochman
Age determination in manatees using growth-layer-group counts in bone
Growth layers were observed in histological preparations of bones of known-age, known minimum-age, and tetracycline-marked free-ranging and captive Florida manatees (Trichechus manatus latirostris), substantiating earlier preliminary findings of other studies. Detailed analysis of 17 new case histories showed that growth-layer group (GLG) counts in the periotic bone were consistent with known age,
Authors
M. Marmontel, T. J. O'Shea, H. I. Kochman, S.R. Humphrey
1993 Annual report on the radio telemetry of manatees in Puerto Rico
Abstract not supplied at this time
Authors
J. P. Reid, R. K. Bonde, Dean E. Easton, H. I. Kochman
An evaluation of aerial survey replicate count methodology to determine trends in manatee abundance
Abstract not supplied at this time
Authors
L.W. Lefebvre, H. I. Kochman
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
Temporal and spatial distribution of manatees in Kings Bay, Crystal River, Florida
No abstract available.
Authors
H. I. Kochman, G. B. Rathbun, J. A. Powell
Consumption of aquatic plants by the West Indian manatee
No abstract available.
Authors
K. Etheridge, G. B. Rathbun, J. A. Powell, H. I. Kochman
Contaminant concentrations in manatees in Florida
The status of the endangered manatee (Trichehus manatus) in relation to organochlorine pesticides, polychlorinated biphenyls, mercury, lead, cadmium, copper, iron, and selenium was investigated in Florida from 1977 to 1981. Concentrations of organochlorines in blubber, mercury in muscle and liver, lead in liver, and lead and cadmium in kidneys did not indicate high exposure to these contaminants.
Authors
T. J. O'Shea, John F. Moore, H. I. Kochman
Use of Kings Bay, Crystal River, Florida by the West Indian manatee (Trichechus manatus)
No abstract available at this time
Authors
H. I. Kochman, G. B. Rathbun, J. A. Powell
Aerial surveys for manatees and dolphins in western peninsular Florida (with notes on sightings of sea turtles and crocodiles)
No abstract available.
Authors
A. Blair Irvine, John E. Caffin, Howard I. Kochman
Science and Products
Filter Total Items: 13
Model description and evaluation of the mark-recapture survival model used to parameterize the 2012 status and threats analysis for the Florida manatee (Trichechus manatus latirostris)
This report provides supporting details and evidence for the rationale, validity and efficacy of a new mark-recapture model, the Barker Robust Design, to estimate regional manatee survival rates used to parameterize several components of the 2012 version of the Manatee Core Biological Model (CBM) and Threats Analysis (TA). The CBM and TA provide scientific analyses on population viability of the
Authors
Catherine A. Langtimm, William L. Kendall, Cathy A. Beck, Howard I. Kochman, Amy L. Teague, Gaia Meigs-Friend, Claudia L. Peñaloza
Seasonal movements, migratory behavior, and site fidelity of West Indian manatees along the Atlantic coast of the United States
The West Indian manatee (Trichechus manatus) is endangered by human activities throughout its range, including the U.S. Atlantic coast where habitat degradation from coastal development and manatee deaths from watercraft collisions have been particularly severe. We radio-tagged and tracked 78 manatees along the east coast of Florida and Georgia over a 12-year period (1986-1998). Our goals were to
Authors
C. J. Deutsch, J. P. Reid, R. K. Bonde, Dean E. Easton, H. I. Kochman, T. J. O'Shea
Manatee response to boating activity in a thermal refuge
Thermal refuges are important for the endangered Florida manatee (Trichechus manatus latirostris) during winter cold periods in temperate latitudes. However, little research has examined impacts on manatees from human disturbance during these critical periods. We studied the effect of recreational boating activity on manatee use of established sanctuaries in the natural thermal refuge created by w
Authors
C.A. Buckingham, L.W. Lefebvre, J.M. Schaefer, H. I. Kochman
Age determination in manatees using growth-layer-group counts in bone
Growth layers were observed in histological preparations of bones of known-age, known minimum-age, and tetracycline-marked free-ranging and captive Florida manatees (Trichechus manatus latirostris), substantiating earlier preliminary findings of other studies. Detailed analysis of 17 new case histories showed that growth-layer group (GLG) counts in the periotic bone were consistent with known age,
Authors
M. Marmontel, T. J. O'Shea, H. I. Kochman, S.R. Humphrey
1993 Annual report on the radio telemetry of manatees in Puerto Rico
Abstract not supplied at this time
Authors
J. P. Reid, R. K. Bonde, Dean E. Easton, H. I. Kochman
An evaluation of aerial survey replicate count methodology to determine trends in manatee abundance
Abstract not supplied at this time
Authors
L.W. Lefebvre, H. I. Kochman
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
Temporal and spatial distribution of manatees in Kings Bay, Crystal River, Florida
No abstract available.
Authors
H. I. Kochman, G. B. Rathbun, J. A. Powell
Consumption of aquatic plants by the West Indian manatee
No abstract available.
Authors
K. Etheridge, G. B. Rathbun, J. A. Powell, H. I. Kochman
Contaminant concentrations in manatees in Florida
The status of the endangered manatee (Trichehus manatus) in relation to organochlorine pesticides, polychlorinated biphenyls, mercury, lead, cadmium, copper, iron, and selenium was investigated in Florida from 1977 to 1981. Concentrations of organochlorines in blubber, mercury in muscle and liver, lead in liver, and lead and cadmium in kidneys did not indicate high exposure to these contaminants.
Authors
T. J. O'Shea, John F. Moore, H. I. Kochman
Use of Kings Bay, Crystal River, Florida by the West Indian manatee (Trichechus manatus)
No abstract available at this time
Authors
H. I. Kochman, G. B. Rathbun, J. A. Powell
Aerial surveys for manatees and dolphins in western peninsular Florida (with notes on sightings of sea turtles and crocodiles)
No abstract available.
Authors
A. Blair Irvine, John E. Caffin, Howard I. Kochman