Assessing the reproductive biology of the Greenland shark (Somniosus microcephalus)
The Greenland shark (Somniosus microcephalus, Squaliformes: Somniosidae) is a long-lived Arctic top predator, which in combination with the high historical and modern fishing pressures, has made it subject to increased scientific focus in recent years. Key aspects of reproduction are not well known...
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2020
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Online Access: | https://research.abo.fi/en/publications/f9ad09b6-d5dd-4dcc-84d1-b6502ce4310d https://doi.org/10.1371/journal.pone.0238986 https://research.abo.fi/ws/files/27367174/pone.0238986_1_.pdf https://urn.fi/URN:NBN:fi-fe202201148145 |
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ftaboakademicris:oai:pure.atira.dk:publications/f9ad09b6-d5dd-4dcc-84d1-b6502ce4310d 2024-05-19T07:36:15+00:00 Assessing the reproductive biology of the Greenland shark (Somniosus microcephalus) Nielsen, Julius Hedeholm, Rasmus Lynghammar, Arve McClusky, Leon Berland, Björn Steffensen, John F. Christiansen, Jörgen 2020 application/pdf https://research.abo.fi/en/publications/f9ad09b6-d5dd-4dcc-84d1-b6502ce4310d https://doi.org/10.1371/journal.pone.0238986 https://research.abo.fi/ws/files/27367174/pone.0238986_1_.pdf https://urn.fi/URN:NBN:fi-fe202201148145 eng eng https://research.abo.fi/en/publications/f9ad09b6-d5dd-4dcc-84d1-b6502ce4310d info:eu-repo/semantics/openAccess Nielsen , J , Hedeholm , R , Lynghammar , A , McClusky , L , Berland , B , Steffensen , J F & Christiansen , J 2020 , ' Assessing the reproductive biology of the Greenland shark (Somniosus microcephalus) ' , PLOS ONE , vol. 15 , no. 10 , pp. 1-22 . https://doi.org/10.1371/journal.pone.0238986 article 2020 ftaboakademicris https://doi.org/10.1371/journal.pone.0238986 2024-04-30T02:39:19Z The Greenland shark (Somniosus microcephalus, Squaliformes: Somniosidae) is a long-lived Arctic top predator, which in combination with the high historical and modern fishing pressures, has made it subject to increased scientific focus in recent years. Key aspects of reproduction are not well known as exemplified by sparse and contradictory information e.g. on birth size and number of pups per pregnancy. This study represents the first comprehensive work on Greenland shark reproductive biology based on data from 312 specimens collected over the past 60 years. We provide guidelines quantifying reproductive parameters to assess specific maturation stages, as well as calculate body length-at-maturity (TL50) which was 2.84±0.06 m for males and 4.19±0.04 m for females. From the available information on the ovarian fecundity of Greenland sharks as well as a meta-analysis of Squaliform reproductive parameters, we estimate up to 200–324 pups per pregnancy (depending on maternal size) with a body length-at-birth of 35–45 cm. These estimates remain to be verified by future observations from gravid Greenland sharks. Article in Journal/Newspaper Arctic Greenland Somniosus microcephalus Åbo Akademi University Research Portal PLOS ONE 15 10 e0238986 |
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Open Polar |
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Åbo Akademi University Research Portal |
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ftaboakademicris |
language |
English |
description |
The Greenland shark (Somniosus microcephalus, Squaliformes: Somniosidae) is a long-lived Arctic top predator, which in combination with the high historical and modern fishing pressures, has made it subject to increased scientific focus in recent years. Key aspects of reproduction are not well known as exemplified by sparse and contradictory information e.g. on birth size and number of pups per pregnancy. This study represents the first comprehensive work on Greenland shark reproductive biology based on data from 312 specimens collected over the past 60 years. We provide guidelines quantifying reproductive parameters to assess specific maturation stages, as well as calculate body length-at-maturity (TL50) which was 2.84±0.06 m for males and 4.19±0.04 m for females. From the available information on the ovarian fecundity of Greenland sharks as well as a meta-analysis of Squaliform reproductive parameters, we estimate up to 200–324 pups per pregnancy (depending on maternal size) with a body length-at-birth of 35–45 cm. These estimates remain to be verified by future observations from gravid Greenland sharks. |
format |
Article in Journal/Newspaper |
author |
Nielsen, Julius Hedeholm, Rasmus Lynghammar, Arve McClusky, Leon Berland, Björn Steffensen, John F. Christiansen, Jörgen |
spellingShingle |
Nielsen, Julius Hedeholm, Rasmus Lynghammar, Arve McClusky, Leon Berland, Björn Steffensen, John F. Christiansen, Jörgen Assessing the reproductive biology of the Greenland shark (Somniosus microcephalus) |
author_facet |
Nielsen, Julius Hedeholm, Rasmus Lynghammar, Arve McClusky, Leon Berland, Björn Steffensen, John F. Christiansen, Jörgen |
author_sort |
Nielsen, Julius |
title |
Assessing the reproductive biology of the Greenland shark (Somniosus microcephalus) |
title_short |
Assessing the reproductive biology of the Greenland shark (Somniosus microcephalus) |
title_full |
Assessing the reproductive biology of the Greenland shark (Somniosus microcephalus) |
title_fullStr |
Assessing the reproductive biology of the Greenland shark (Somniosus microcephalus) |
title_full_unstemmed |
Assessing the reproductive biology of the Greenland shark (Somniosus microcephalus) |
title_sort |
assessing the reproductive biology of the greenland shark (somniosus microcephalus) |
publishDate |
2020 |
url |
https://research.abo.fi/en/publications/f9ad09b6-d5dd-4dcc-84d1-b6502ce4310d https://doi.org/10.1371/journal.pone.0238986 https://research.abo.fi/ws/files/27367174/pone.0238986_1_.pdf https://urn.fi/URN:NBN:fi-fe202201148145 |
genre |
Arctic Greenland Somniosus microcephalus |
genre_facet |
Arctic Greenland Somniosus microcephalus |
op_source |
Nielsen , J , Hedeholm , R , Lynghammar , A , McClusky , L , Berland , B , Steffensen , J F & Christiansen , J 2020 , ' Assessing the reproductive biology of the Greenland shark (Somniosus microcephalus) ' , PLOS ONE , vol. 15 , no. 10 , pp. 1-22 . https://doi.org/10.1371/journal.pone.0238986 |
op_relation |
https://research.abo.fi/en/publications/f9ad09b6-d5dd-4dcc-84d1-b6502ce4310d |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1371/journal.pone.0238986 |
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PLOS ONE |
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15 |
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10 |
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e0238986 |
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