Howard Kochman
Science and Products
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...
Langtimm, Catherine A.; Kendall, William L.; Beck, Cathy A.; Kochman, Howard I.; Teague, Amy L.; Meigs-Friend, Gaia; Peñaloza, Claudia L.
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...
Deutsch, C.J.; Reid, J.P.; Bonde, R.K.; Easton, Dean E.; Kochman, H.I.; O'Shea, T.J. 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...
Buckingham, C.A.; Lefebvre, L.W.; Schaefer, J.M.; Kochman, H.I. 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...
Marmontel, M.; O'Shea, T.J.; Kochman, H.I.; Humphrey, S.R. 1993 Annual report on the radio telemetry of manatees in Puerto Rico
Abstract not supplied at this time
Reid, J.P.; Bonde, R.K.; Easton, Dean E.; Kochman, H.I. An evaluation of aerial survey replicate count methodology to determine trends in manatee abundance
Abstract not supplied at this time
Lefebvre, L.W.; Kochman, H.I. Florida manatees: distribution, geographically referenced data sets, and ecological and behavioral aspects of habitat use
Abstract not supplied at this time
O'Shea, T.J.; Kochman, H.I. Consumption of aquatic plants by the West Indian manatee
Etheridge, K.; Rathbun, G.B.; Powell, J. A.; Kochman, H.I. Temporal and spatial distribution of manatees in Kings Bay, Crystal River, Florida
Kochman, H.I.; Rathbun, G.B.; Powell, J. A. 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...
O'Shea, T.J.; Moore, John F.; Kochman, H.I. Use of Kings Bay, Crystal River, Florida by the West Indian manatee (Trichechus manatus)
No abstract available at this time
Packard, J.M.; Kochman, H.I.; Rathbun, G.B.; Powell, J. A.