Cetorhinus maximus and their Implications for Management of Whale Sharks Rhincodon typus
New methods were used to reanalyse previously published length-frequency data on basking shark Cetorhinus maximus and thereby resolve an earlier controversy about the growth rate ofthis fish. These methods confirm earlier suggestions of a slow growth (von Bertalanffy K>0.06/year, for an asymptoti...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.310.2128 2023-05-15T15:53:50+02:00 Cetorhinus maximus and their Implications for Management of Whale Sharks Rhincodon typus Biodiversity Conselvation Frances A Daniel Pauly The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.310.2128 http://www.seaaroundus.org/researcher/dpauly/PDF/2002/Books%26Chapters/GrowthMortalityBaskingSharkImplicationsWhaleShark.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.310.2128 http://www.seaaroundus.org/researcher/dpauly/PDF/2002/Books%26Chapters/GrowthMortalityBaskingSharkImplicationsWhaleShark.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.seaaroundus.org/researcher/dpauly/PDF/2002/Books%26Chapters/GrowthMortalityBaskingSharkImplicationsWhaleShark.pdf text ftciteseerx 2016-01-07T22:29:50Z New methods were used to reanalyse previously published length-frequency data on basking shark Cetorhinus maximus and thereby resolve an earlier controversy about the growth rate ofthis fish. These methods confirm earlier suggestions of a slow growth (von Bertalanffy K>0.06/year, for an asymptotic length of 10m), and correspondingly low natural mortality (M>0.07/year), as appropriate for a fish with a record length of 9.7m. Given what is known of the inverse relationship between asymptotic length and K in hundreds of fish species (including sharks), the above results imply that whale sharks Rhincodon typus should exhibit, for an asymptotic length of 14m, K and M values of about 0.03 and O.OS/year, respectively. Such slow growth and the high longevity this implies should make whale sharks even more sensitive than basking sharks to human-induced mortality, thus arguing against exploitation by fisheries. Also, ecotourism schemes will have to be careful to avoid becoming a source of indirect mortality. Text Cetorhinus maximus Unknown |
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English |
description |
New methods were used to reanalyse previously published length-frequency data on basking shark Cetorhinus maximus and thereby resolve an earlier controversy about the growth rate ofthis fish. These methods confirm earlier suggestions of a slow growth (von Bertalanffy K>0.06/year, for an asymptotic length of 10m), and correspondingly low natural mortality (M>0.07/year), as appropriate for a fish with a record length of 9.7m. Given what is known of the inverse relationship between asymptotic length and K in hundreds of fish species (including sharks), the above results imply that whale sharks Rhincodon typus should exhibit, for an asymptotic length of 14m, K and M values of about 0.03 and O.OS/year, respectively. Such slow growth and the high longevity this implies should make whale sharks even more sensitive than basking sharks to human-induced mortality, thus arguing against exploitation by fisheries. Also, ecotourism schemes will have to be careful to avoid becoming a source of indirect mortality. |
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The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Biodiversity Conselvation Frances A Daniel Pauly |
spellingShingle |
Biodiversity Conselvation Frances A Daniel Pauly Cetorhinus maximus and their Implications for Management of Whale Sharks Rhincodon typus |
author_facet |
Biodiversity Conselvation Frances A Daniel Pauly |
author_sort |
Biodiversity Conselvation |
title |
Cetorhinus maximus and their Implications for Management of Whale Sharks Rhincodon typus |
title_short |
Cetorhinus maximus and their Implications for Management of Whale Sharks Rhincodon typus |
title_full |
Cetorhinus maximus and their Implications for Management of Whale Sharks Rhincodon typus |
title_fullStr |
Cetorhinus maximus and their Implications for Management of Whale Sharks Rhincodon typus |
title_full_unstemmed |
Cetorhinus maximus and their Implications for Management of Whale Sharks Rhincodon typus |
title_sort |
cetorhinus maximus and their implications for management of whale sharks rhincodon typus |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.310.2128 http://www.seaaroundus.org/researcher/dpauly/PDF/2002/Books%26Chapters/GrowthMortalityBaskingSharkImplicationsWhaleShark.pdf |
genre |
Cetorhinus maximus |
genre_facet |
Cetorhinus maximus |
op_source |
http://www.seaaroundus.org/researcher/dpauly/PDF/2002/Books%26Chapters/GrowthMortalityBaskingSharkImplicationsWhaleShark.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.310.2128 http://www.seaaroundus.org/researcher/dpauly/PDF/2002/Books%26Chapters/GrowthMortalityBaskingSharkImplicationsWhaleShark.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766389007733751808 |