Modeling Age-Specific Mortality For Marine Mammal Populations
A method is presented for estimating age-specific mortality based on minimal information: a model life table and an estimate of longevity. This approach uses expected patterns of mammalian survivorship to define a general model of age-specific mortality rates. One such model life table is based on d...
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DigitalCommons@University of Nebraska - Lincoln
1991
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ftunivnebraskali:oai:digitalcommons.unl.edu:usdeptcommercepub-1148 2023-11-12T04:24:40+01:00 Modeling Age-Specific Mortality For Marine Mammal Populations Barlow, Jay Boveng, Peter 1991-01-01T08:00:00Z application/pdf https://digitalcommons.unl.edu/usdeptcommercepub/148 https://digitalcommons.unl.edu/context/usdeptcommercepub/article/1148/viewcontent/Boveng_MMS_1991_Modelling_age_specific_mortality.pdf unknown DigitalCommons@University of Nebraska - Lincoln https://digitalcommons.unl.edu/usdeptcommercepub/148 https://digitalcommons.unl.edu/context/usdeptcommercepub/article/1148/viewcontent/Boveng_MMS_1991_Modelling_age_specific_mortality.pdf Publications, Agencies and Staff of the U.S. Department of Commerce Environmental Sciences text 1991 ftunivnebraskali 2023-10-30T10:43:04Z A method is presented for estimating age-specific mortality based on minimal information: a model life table and an estimate of longevity. This approach uses expected patterns of mammalian survivorship to define a general model of age-specific mortality rates. One such model life table is based on data for northern fur seals (Callorhinus ursinus) using Siler’s (1979) 5-parameter competing risk model. Alternative model life tables are based on historical data for human females and on a published model for Old World monkeys. Survival rates for a marine mammal species are then calculated by scaling these models by the longevity of that species. By using a realistic model (instead of assuming constant mortality), one can see more easily the real biological limits to population growth. The mortality estimation procedure is illustrated with examples of spotted dolphins (Stenella attenuata) and harbor porpoise (Phocoena phocoena). Text Phocoena phocoena Callorhinus ursinus University of Nebraska-Lincoln: DigitalCommons@UNL |
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University of Nebraska-Lincoln: DigitalCommons@UNL |
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ftunivnebraskali |
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unknown |
topic |
Environmental Sciences |
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Environmental Sciences Barlow, Jay Boveng, Peter Modeling Age-Specific Mortality For Marine Mammal Populations |
topic_facet |
Environmental Sciences |
description |
A method is presented for estimating age-specific mortality based on minimal information: a model life table and an estimate of longevity. This approach uses expected patterns of mammalian survivorship to define a general model of age-specific mortality rates. One such model life table is based on data for northern fur seals (Callorhinus ursinus) using Siler’s (1979) 5-parameter competing risk model. Alternative model life tables are based on historical data for human females and on a published model for Old World monkeys. Survival rates for a marine mammal species are then calculated by scaling these models by the longevity of that species. By using a realistic model (instead of assuming constant mortality), one can see more easily the real biological limits to population growth. The mortality estimation procedure is illustrated with examples of spotted dolphins (Stenella attenuata) and harbor porpoise (Phocoena phocoena). |
format |
Text |
author |
Barlow, Jay Boveng, Peter |
author_facet |
Barlow, Jay Boveng, Peter |
author_sort |
Barlow, Jay |
title |
Modeling Age-Specific Mortality For Marine Mammal Populations |
title_short |
Modeling Age-Specific Mortality For Marine Mammal Populations |
title_full |
Modeling Age-Specific Mortality For Marine Mammal Populations |
title_fullStr |
Modeling Age-Specific Mortality For Marine Mammal Populations |
title_full_unstemmed |
Modeling Age-Specific Mortality For Marine Mammal Populations |
title_sort |
modeling age-specific mortality for marine mammal populations |
publisher |
DigitalCommons@University of Nebraska - Lincoln |
publishDate |
1991 |
url |
https://digitalcommons.unl.edu/usdeptcommercepub/148 https://digitalcommons.unl.edu/context/usdeptcommercepub/article/1148/viewcontent/Boveng_MMS_1991_Modelling_age_specific_mortality.pdf |
genre |
Phocoena phocoena Callorhinus ursinus |
genre_facet |
Phocoena phocoena Callorhinus ursinus |
op_source |
Publications, Agencies and Staff of the U.S. Department of Commerce |
op_relation |
https://digitalcommons.unl.edu/usdeptcommercepub/148 https://digitalcommons.unl.edu/context/usdeptcommercepub/article/1148/viewcontent/Boveng_MMS_1991_Modelling_age_specific_mortality.pdf |
_version_ |
1782339149702889472 |