Demographic analysis of sperm whales using matrix population models
The focus of this study is to investigate the demographic and sensitivity/elasticity analysis of the endangered sperm whale population. First, a matrix population model corresponding to a general sperm whale life cycle is presented. The values of the parameters in the model are then estimated. The p...
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Online Access: | http://www.sciencedirect.com/science/article/pii/S0304380012005029 |
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ftrepec:oai:RePEc:eee:ecomod:v:248:y:2013:i:c:p:71-79 2024-04-14T08:20:05+00:00 Demographic analysis of sperm whales using matrix population models Chiquet, Ross A. Ma, Baoling Ackleh, Azmy S. Pal, Nabendu Sidorovskaia, Natalia http://www.sciencedirect.com/science/article/pii/S0304380012005029 unknown http://www.sciencedirect.com/science/article/pii/S0304380012005029 article ftrepec 2024-03-19T10:30:21Z The focus of this study is to investigate the demographic and sensitivity/elasticity analysis of the endangered sperm whale population. First, a matrix population model corresponding to a general sperm whale life cycle is presented. The values of the parameters in the model are then estimated. The population's asymptotic growth rate λ, life expectancy and net reproduction number are calculated. Extinction time probability distribution is also studied. The results show that the sperm whale population grows slowly and is potentially very fragile. The asymptotic growth rate is most sensitive to the survivorship rates, especially to survivorship rate of mature females, and less so to maturity rates. Our results also indicate that these survivorship rates are very delicate, and a slight decrease could result in an asymptotic growth rate below one, i.e., a declining population, leading to extinction. Sperm whale; Matrix models; Sensitivity and elasticity analysis; Asymptotic growth rate; Extinction probability; Article in Journal/Newspaper Sperm whale RePEc (Research Papers in Economics) |
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Open Polar |
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RePEc (Research Papers in Economics) |
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ftrepec |
language |
unknown |
description |
The focus of this study is to investigate the demographic and sensitivity/elasticity analysis of the endangered sperm whale population. First, a matrix population model corresponding to a general sperm whale life cycle is presented. The values of the parameters in the model are then estimated. The population's asymptotic growth rate λ, life expectancy and net reproduction number are calculated. Extinction time probability distribution is also studied. The results show that the sperm whale population grows slowly and is potentially very fragile. The asymptotic growth rate is most sensitive to the survivorship rates, especially to survivorship rate of mature females, and less so to maturity rates. Our results also indicate that these survivorship rates are very delicate, and a slight decrease could result in an asymptotic growth rate below one, i.e., a declining population, leading to extinction. Sperm whale; Matrix models; Sensitivity and elasticity analysis; Asymptotic growth rate; Extinction probability; |
format |
Article in Journal/Newspaper |
author |
Chiquet, Ross A. Ma, Baoling Ackleh, Azmy S. Pal, Nabendu Sidorovskaia, Natalia |
spellingShingle |
Chiquet, Ross A. Ma, Baoling Ackleh, Azmy S. Pal, Nabendu Sidorovskaia, Natalia Demographic analysis of sperm whales using matrix population models |
author_facet |
Chiquet, Ross A. Ma, Baoling Ackleh, Azmy S. Pal, Nabendu Sidorovskaia, Natalia |
author_sort |
Chiquet, Ross A. |
title |
Demographic analysis of sperm whales using matrix population models |
title_short |
Demographic analysis of sperm whales using matrix population models |
title_full |
Demographic analysis of sperm whales using matrix population models |
title_fullStr |
Demographic analysis of sperm whales using matrix population models |
title_full_unstemmed |
Demographic analysis of sperm whales using matrix population models |
title_sort |
demographic analysis of sperm whales using matrix population models |
url |
http://www.sciencedirect.com/science/article/pii/S0304380012005029 |
genre |
Sperm whale |
genre_facet |
Sperm whale |
op_relation |
http://www.sciencedirect.com/science/article/pii/S0304380012005029 |
_version_ |
1796298291179159552 |