Cathy Beck
Cathy Beck is a Scientist Emeritus at the USGS Wetland and Aquatic Research Center.
Science and Products
Filter Total Items: 35
Research on the impacts of past and future hurricanes on the endangered Florida manatee
U.S. Geological Survey (USGS) research on Florida manatees (Trichechus manatus latirostris) from 1982 through 1998 identified lower apparent survival rates for adult manatees during years when Hurricane Elena (1985), the March "Storm of the Century"(1993), and Hurricane Opal (1995) hit the northern coast of the Gulf of Mexico. Although our analysis showed that a significant number of our monitored
Authors
Catherine A. Langtimm, M. Dennis Krohn, Bradley Stith, James P. Reid, C.A. Beck, Susan M. Butler
Procedures for the salvage and necropsy of the dugong (Dugong dugon)
Data and specimens collected from dugong carcasses and live stranded individuals provide vital information for research and management agencies. The ability to assign a cause of death (natural and/or human induced) to a carcass assists managers to identify major threats to a population in certain areas and to evaluate and adapt management measures. Data collectedfrom dugong carcasses have contribu
Authors
Carole Eros, Helene Marsh, Robert K. Bonde, Thomas A. O'Shea, Cathy A. Beck, Cheri Recchia, Kirstin Dobbs, Malcolm Turner, Stephanie Lemm, Rachel Pears, Rachel Bowater
Diet induced differences in carbon isotope fractionation between sirenians and terrestrial ungulates
Carbon isotope differences (??13C) between bioapatite and diet, collagen and diet, and bioapatite and collagen were calculated for four species of sirenians, Dugong dugon (Mu??ller), Trichechus manatus (Linnaeus), Trichechus inunguis (Natterer), and the extinct Hydrodamalis gigas (Zimmerman). Bone and tooth samples were taken from archived materials collected from populations during the mid eighte
Authors
M.T. Clementz, P.L. Koch, C.A. Beck
Possible effects of the 2004 and 2005 hurricanes on manatee survival rates and movement
Prior research on manatee (Trichechus manatus latirostris) survival in northwest Florida, based on mark-resighting photo-identification data from 1982-1998, showed that annual adult apparent survival rate was significantly lower during years with extreme storms. Mechanisms that we proposed could have led to lower estimates included stranding, injury from debris, being fatally swept out to sea, or
Authors
C.A. Langtimm, M. D. Krohn, J. P. Reid, B.M. Stith, C.A. Beck
Manatee occurrence in the northern Gulf of Mexico, west of Florida
Reports of West Indian manatees (Trichechus manatus) in the US Gulf of Mexico west of Florida have increased during the last decade. We reviewed all available manatee sighting, capture, and carcass records (n = 377) from Alabama, Louisiana, Mississippi, and Texas since the early 1900s; only 40 of these were previously published. Manatees were reported most often in estuarine habitats, usually eith
Authors
D. Fertl, A. J. Schiro, G. T. Regan, Cathy A. Beck, N. Adimey, L. Price-May, A. Amos, Graham A.J. Worthy, R. Crossland
Survival estimates for Florida manatees from the photo-identification of individuals
We estimated adult survival probabilities for the endangered Florida manatee (Trichechus manatus latirostris) in four regional populations using photo-identification data and open-population capture-recapture statistical models. The mean annual adult survival probability over the most recent 10-yr period of available estimates was as follows: Northwest - 0.956 (SE 0.007), Upper St. Johns River - 0
Authors
C.A. Langtimm, C.A. Beck, H.H. Edwards, K. J. Fick-Child, B.B. Ackerman, S.L. Barton, W.C. Hartley
Capture-recapture analysis for estimating manatee reproductive rates
Modeling the life history of the endangered Florida manatee (Trichechus manatus latirostris) is an important step toward understanding its population dynamics and predicting its response to management actions. We developed a multi-state mark-resighting model for data collected under Pollock's robust design. This model estimates breeding probability conditional on a female's breeding state in the p
Authors
W. L. Kendall, C.A. Langtimm, C.A. Beck, M.C. Runge
Lower survival probabilities for adult Florida manatees in years with intense coastal storms
The endangered Florida manatee (Trichechus manatus latirostris) inhabits the subtropical waters of the southeastern United States, where hurricanes are a regular occurrence. Using mark-resighting statistical models, we analyzed 19 years of photo-identification data and detected significant annual variation in adult survival for a subpopulation in northwest Florida where human impact is low. That v
Authors
C.A. Langtimm, C.A. Beck
Florida manatees: Perspectives on populations, pain, and protection
This overview has three related objectives. First, it provides simple documentation, descriptive summaries, and anecdotal accounts that demonstrate the extent to which maiming, and likely pain and suffering, occur in wild manatees as a result of strikes by boats. The chapter calls attention to the issues wounding raises for policy makers and managers involved with implementing boat speed zones, pa
Authors
Thomas J. O'Shea, Lynn W. Lefebvre, Cathy A. Beck
Parasites and commensals of the West Indian manatee from Puerto Rico
Metazoan parasites and commensals were collected from dead manatees salvaged in Puerto Rico. Thirty-five manatees were examined between 1980 and 1998. Parasites and commensals were identified in 20 (57%) manatees and included 3 species of helminths, 1 nematode (Heterocheilus tunicatus) and 2 digeneans (Chiorchis fabaceus and Cochleotrema cochleotrema). Two species of commensals were also associate
Authors
A. A. Mignucci-Giannoni, C.A. Beck, R. A. Montoya-Ospina, E.H. Williams
Comparison of the capabilities of dugongs and West Indian manatees to masticate seagrasses
No abstract available.
Authors
Helene Marsh, Cathy A. Beck, Tim Vargo
The diet of the manatee (Trichechus Manatus) in Puerto Rico
[No abstract available]
Authors
A. A. Mignucci-Giannoni, C.A. Beck
Science and Products
Filter Total Items: 35
Research on the impacts of past and future hurricanes on the endangered Florida manatee
U.S. Geological Survey (USGS) research on Florida manatees (Trichechus manatus latirostris) from 1982 through 1998 identified lower apparent survival rates for adult manatees during years when Hurricane Elena (1985), the March "Storm of the Century"(1993), and Hurricane Opal (1995) hit the northern coast of the Gulf of Mexico. Although our analysis showed that a significant number of our monitored
Authors
Catherine A. Langtimm, M. Dennis Krohn, Bradley Stith, James P. Reid, C.A. Beck, Susan M. Butler
Procedures for the salvage and necropsy of the dugong (Dugong dugon)
Data and specimens collected from dugong carcasses and live stranded individuals provide vital information for research and management agencies. The ability to assign a cause of death (natural and/or human induced) to a carcass assists managers to identify major threats to a population in certain areas and to evaluate and adapt management measures. Data collectedfrom dugong carcasses have contribu
Authors
Carole Eros, Helene Marsh, Robert K. Bonde, Thomas A. O'Shea, Cathy A. Beck, Cheri Recchia, Kirstin Dobbs, Malcolm Turner, Stephanie Lemm, Rachel Pears, Rachel Bowater
Diet induced differences in carbon isotope fractionation between sirenians and terrestrial ungulates
Carbon isotope differences (??13C) between bioapatite and diet, collagen and diet, and bioapatite and collagen were calculated for four species of sirenians, Dugong dugon (Mu??ller), Trichechus manatus (Linnaeus), Trichechus inunguis (Natterer), and the extinct Hydrodamalis gigas (Zimmerman). Bone and tooth samples were taken from archived materials collected from populations during the mid eighte
Authors
M.T. Clementz, P.L. Koch, C.A. Beck
Possible effects of the 2004 and 2005 hurricanes on manatee survival rates and movement
Prior research on manatee (Trichechus manatus latirostris) survival in northwest Florida, based on mark-resighting photo-identification data from 1982-1998, showed that annual adult apparent survival rate was significantly lower during years with extreme storms. Mechanisms that we proposed could have led to lower estimates included stranding, injury from debris, being fatally swept out to sea, or
Authors
C.A. Langtimm, M. D. Krohn, J. P. Reid, B.M. Stith, C.A. Beck
Manatee occurrence in the northern Gulf of Mexico, west of Florida
Reports of West Indian manatees (Trichechus manatus) in the US Gulf of Mexico west of Florida have increased during the last decade. We reviewed all available manatee sighting, capture, and carcass records (n = 377) from Alabama, Louisiana, Mississippi, and Texas since the early 1900s; only 40 of these were previously published. Manatees were reported most often in estuarine habitats, usually eith
Authors
D. Fertl, A. J. Schiro, G. T. Regan, Cathy A. Beck, N. Adimey, L. Price-May, A. Amos, Graham A.J. Worthy, R. Crossland
Survival estimates for Florida manatees from the photo-identification of individuals
We estimated adult survival probabilities for the endangered Florida manatee (Trichechus manatus latirostris) in four regional populations using photo-identification data and open-population capture-recapture statistical models. The mean annual adult survival probability over the most recent 10-yr period of available estimates was as follows: Northwest - 0.956 (SE 0.007), Upper St. Johns River - 0
Authors
C.A. Langtimm, C.A. Beck, H.H. Edwards, K. J. Fick-Child, B.B. Ackerman, S.L. Barton, W.C. Hartley
Capture-recapture analysis for estimating manatee reproductive rates
Modeling the life history of the endangered Florida manatee (Trichechus manatus latirostris) is an important step toward understanding its population dynamics and predicting its response to management actions. We developed a multi-state mark-resighting model for data collected under Pollock's robust design. This model estimates breeding probability conditional on a female's breeding state in the p
Authors
W. L. Kendall, C.A. Langtimm, C.A. Beck, M.C. Runge
Lower survival probabilities for adult Florida manatees in years with intense coastal storms
The endangered Florida manatee (Trichechus manatus latirostris) inhabits the subtropical waters of the southeastern United States, where hurricanes are a regular occurrence. Using mark-resighting statistical models, we analyzed 19 years of photo-identification data and detected significant annual variation in adult survival for a subpopulation in northwest Florida where human impact is low. That v
Authors
C.A. Langtimm, C.A. Beck
Florida manatees: Perspectives on populations, pain, and protection
This overview has three related objectives. First, it provides simple documentation, descriptive summaries, and anecdotal accounts that demonstrate the extent to which maiming, and likely pain and suffering, occur in wild manatees as a result of strikes by boats. The chapter calls attention to the issues wounding raises for policy makers and managers involved with implementing boat speed zones, pa
Authors
Thomas J. O'Shea, Lynn W. Lefebvre, Cathy A. Beck
Parasites and commensals of the West Indian manatee from Puerto Rico
Metazoan parasites and commensals were collected from dead manatees salvaged in Puerto Rico. Thirty-five manatees were examined between 1980 and 1998. Parasites and commensals were identified in 20 (57%) manatees and included 3 species of helminths, 1 nematode (Heterocheilus tunicatus) and 2 digeneans (Chiorchis fabaceus and Cochleotrema cochleotrema). Two species of commensals were also associate
Authors
A. A. Mignucci-Giannoni, C.A. Beck, R. A. Montoya-Ospina, E.H. Williams
Comparison of the capabilities of dugongs and West Indian manatees to masticate seagrasses
No abstract available.
Authors
Helene Marsh, Cathy A. Beck, Tim Vargo
The diet of the manatee (Trichechus Manatus) in Puerto Rico
[No abstract available]
Authors
A. A. Mignucci-Giannoni, C.A. Beck