Validated age and growth of the porbeagle shark (Lamna nasus) in the western North Atlantic Ocean
Growth parameters were estimated for porbeagle shark (Lamna nasus) in the northwest Atlantic Ocean on the basis of vertebral annuli. A total of 578 vertebrae was analyzed. Annuli were validated up to an age of 11 years by using vertebrae from recaptured oxytetracycline-injected and known-age sharks....
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ftoceandocs:oai:aquadocs.org:1834/31062 2023-05-15T17:06:29+02:00 Validated age and growth of the porbeagle shark (Lamna nasus) in the western North Atlantic Ocean Natanson, Lisa J. Mello, Joseph J. Campana, Steven E. 2002 application/pdf 266-278 http://hdl.handle.net/1834/31062 en eng http://fishbull.noaa.gov/1002/10natans.pdf 0090-0656 http://hdl.handle.net/1834/31062 http://aquaticcommons.org/id/eprint/15209 403 2014-05-30 07:33:39 15209 United States National Marine Fisheries Service Biology Fisheries Management article TRUE 2002 ftoceandocs 2023-04-06T17:04:19Z Growth parameters were estimated for porbeagle shark (Lamna nasus) in the northwest Atlantic Ocean on the basis of vertebral annuli. A total of 578 vertebrae was analyzed. Annuli were validated up to an age of 11 years by using vertebrae from recaptured oxytetracycline-injected and known-age sharks. Males and females grew at similar rates until the size of male sexual maturity, after which the relative growth of the males declined. The growth rate of the females declined in a similar manner at the onset of maturity. Growth curves were consistent with those derived from tag-recapture analyses (GROTAG) of 76 recaptured fish and those based on length-frequency methods with measurements from 13,589 individuals. Von Bertalanffy growth curve parameters (combined sexes) were Lā = 289.4 cm fork length, K = 0.07 and t0 = ā6.06. Maximum age, based on vertebral band pair counts, was 25 and 24 years for males and females, respectively. Longevity calculations, however, indicated a maximum age of 45 to 46 years in an unfished population. Article in Journal/Newspaper Lamna nasus North Atlantic Northwest Atlantic Porbeagle IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications |
institution |
Open Polar |
collection |
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications |
op_collection_id |
ftoceandocs |
language |
English |
topic |
Biology Fisheries Management |
spellingShingle |
Biology Fisheries Management Natanson, Lisa J. Mello, Joseph J. Campana, Steven E. Validated age and growth of the porbeagle shark (Lamna nasus) in the western North Atlantic Ocean |
topic_facet |
Biology Fisheries Management |
description |
Growth parameters were estimated for porbeagle shark (Lamna nasus) in the northwest Atlantic Ocean on the basis of vertebral annuli. A total of 578 vertebrae was analyzed. Annuli were validated up to an age of 11 years by using vertebrae from recaptured oxytetracycline-injected and known-age sharks. Males and females grew at similar rates until the size of male sexual maturity, after which the relative growth of the males declined. The growth rate of the females declined in a similar manner at the onset of maturity. Growth curves were consistent with those derived from tag-recapture analyses (GROTAG) of 76 recaptured fish and those based on length-frequency methods with measurements from 13,589 individuals. Von Bertalanffy growth curve parameters (combined sexes) were Lā = 289.4 cm fork length, K = 0.07 and t0 = ā6.06. Maximum age, based on vertebral band pair counts, was 25 and 24 years for males and females, respectively. Longevity calculations, however, indicated a maximum age of 45 to 46 years in an unfished population. |
format |
Article in Journal/Newspaper |
author |
Natanson, Lisa J. Mello, Joseph J. Campana, Steven E. |
author_facet |
Natanson, Lisa J. Mello, Joseph J. Campana, Steven E. |
author_sort |
Natanson, Lisa J. |
title |
Validated age and growth of the porbeagle shark (Lamna nasus) in the western North Atlantic Ocean |
title_short |
Validated age and growth of the porbeagle shark (Lamna nasus) in the western North Atlantic Ocean |
title_full |
Validated age and growth of the porbeagle shark (Lamna nasus) in the western North Atlantic Ocean |
title_fullStr |
Validated age and growth of the porbeagle shark (Lamna nasus) in the western North Atlantic Ocean |
title_full_unstemmed |
Validated age and growth of the porbeagle shark (Lamna nasus) in the western North Atlantic Ocean |
title_sort |
validated age and growth of the porbeagle shark (lamna nasus) in the western north atlantic ocean |
publishDate |
2002 |
url |
http://hdl.handle.net/1834/31062 |
genre |
Lamna nasus North Atlantic Northwest Atlantic Porbeagle |
genre_facet |
Lamna nasus North Atlantic Northwest Atlantic Porbeagle |
op_source |
http://aquaticcommons.org/id/eprint/15209 403 2014-05-30 07:33:39 15209 United States National Marine Fisheries Service |
op_relation |
http://fishbull.noaa.gov/1002/10natans.pdf 0090-0656 http://hdl.handle.net/1834/31062 |
_version_ |
1766061626612514816 |