The reproductive biology of the porbeage shark (Lamna nasus) in the western North Atlantic Ocean
Reproductive organs from 393 male and 382 female porbeagles (Lamna nasus), caught in the western North Atlantic Ocean, were examined to determine size at maturity and reproductive cycle. Males ranged in size from 86 to 246 cm fork length (FL) and females ranged from 94 to 288 cm FL. Maturity in male...
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ftaquaticcommons:oai:generic.eprints.org:15246 2023-05-15T17:06:29+02:00 The reproductive biology of the porbeage shark (Lamna nasus) in the western North Atlantic Ocean Jensen, Christopher F. Natanson, Lisa J. Pratt Jr., Harold L. Kohler, Nancy Campana, Steven E. 2002 application/pdf http://aquaticcommons.org/15246/ http://fishbull.noaa.gov/1004/08jensen.pdf http://aquaticcommons.org/15246/1/08jensen.pdf en eng http://aquaticcommons.org/15246/1/08jensen.pdf Jensen, Christopher F. and Natanson, Lisa J. and Pratt Jr., Harold L. and Kohler, Nancy and Campana, Steven E. (2002) The reproductive biology of the porbeage shark (Lamna nasus) in the western North Atlantic Ocean. Fishery Bulletin, 100(4), pp. 727-738. Biology Fisheries Management Article PeerReviewed 2002 ftaquaticcommons 2020-02-27T09:26:55Z Reproductive organs from 393 male and 382 female porbeagles (Lamna nasus), caught in the western North Atlantic Ocean, were examined to determine size at maturity and reproductive cycle. Males ranged in size from 86 to 246 cm fork length (FL) and females ranged from 94 to 288 cm FL. Maturity in males was best described by an inflection in the relationship of clasper length to fork length when combined with clasper calcification. Males matured between 162 and 185 cm FL and 50% were mature at 174 cm FL. In females, all reproductive organ measurements related to body length showed a strong inflection around the size of maturity. Females matured between 210 and 230 cm FL and 50% were mature at 218 cm FL. After a protracted fall mating period (September–November), females give birth to an average of 4.0 young in spring (April−June). As in other lamnids, young are nourished through oophagy. Evidence from this study indicated a one-year reproductive cycle and gestation period lasting 8–9 months. Article in Journal/Newspaper Lamna nasus North Atlantic International Association of Aquatic and Marine Science Libraries and Information Centers (IAMSLIC): Aquatic Commons |
institution |
Open Polar |
collection |
International Association of Aquatic and Marine Science Libraries and Information Centers (IAMSLIC): Aquatic Commons |
op_collection_id |
ftaquaticcommons |
language |
English |
topic |
Biology Fisheries Management |
spellingShingle |
Biology Fisheries Management Jensen, Christopher F. Natanson, Lisa J. Pratt Jr., Harold L. Kohler, Nancy Campana, Steven E. The reproductive biology of the porbeage shark (Lamna nasus) in the western North Atlantic Ocean |
topic_facet |
Biology Fisheries Management |
description |
Reproductive organs from 393 male and 382 female porbeagles (Lamna nasus), caught in the western North Atlantic Ocean, were examined to determine size at maturity and reproductive cycle. Males ranged in size from 86 to 246 cm fork length (FL) and females ranged from 94 to 288 cm FL. Maturity in males was best described by an inflection in the relationship of clasper length to fork length when combined with clasper calcification. Males matured between 162 and 185 cm FL and 50% were mature at 174 cm FL. In females, all reproductive organ measurements related to body length showed a strong inflection around the size of maturity. Females matured between 210 and 230 cm FL and 50% were mature at 218 cm FL. After a protracted fall mating period (September–November), females give birth to an average of 4.0 young in spring (April−June). As in other lamnids, young are nourished through oophagy. Evidence from this study indicated a one-year reproductive cycle and gestation period lasting 8–9 months. |
format |
Article in Journal/Newspaper |
author |
Jensen, Christopher F. Natanson, Lisa J. Pratt Jr., Harold L. Kohler, Nancy Campana, Steven E. |
author_facet |
Jensen, Christopher F. Natanson, Lisa J. Pratt Jr., Harold L. Kohler, Nancy Campana, Steven E. |
author_sort |
Jensen, Christopher F. |
title |
The reproductive biology of the porbeage shark (Lamna nasus) in the western North Atlantic Ocean |
title_short |
The reproductive biology of the porbeage shark (Lamna nasus) in the western North Atlantic Ocean |
title_full |
The reproductive biology of the porbeage shark (Lamna nasus) in the western North Atlantic Ocean |
title_fullStr |
The reproductive biology of the porbeage shark (Lamna nasus) in the western North Atlantic Ocean |
title_full_unstemmed |
The reproductive biology of the porbeage shark (Lamna nasus) in the western North Atlantic Ocean |
title_sort |
reproductive biology of the porbeage shark (lamna nasus) in the western north atlantic ocean |
publishDate |
2002 |
url |
http://aquaticcommons.org/15246/ http://fishbull.noaa.gov/1004/08jensen.pdf http://aquaticcommons.org/15246/1/08jensen.pdf |
genre |
Lamna nasus North Atlantic |
genre_facet |
Lamna nasus North Atlantic |
op_relation |
http://aquaticcommons.org/15246/1/08jensen.pdf Jensen, Christopher F. and Natanson, Lisa J. and Pratt Jr., Harold L. and Kohler, Nancy and Campana, Steven E. (2002) The reproductive biology of the porbeage shark (Lamna nasus) in the western North Atlantic Ocean. Fishery Bulletin, 100(4), pp. 727-738. |
_version_ |
1766061626439499776 |