Sex-specific life history strategies in capelin ( Mallotus villosus )?
The life history of capelin (Mallotus villosus) is presently suggested to be sex specific: while males follow a semelparous batch-spawning strategy, females are iteroparous. This hypothesis is based on predictions from a life history simulation model of Barents Sea capelin that shows that iteroparit...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Canadian Science Publishing
1998
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Online Access: | http://dx.doi.org/10.1139/f97-275 http://www.nrcresearchpress.com/doi/pdf/10.1139/f97-275 |
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crcansciencepubl:10.1139/f97-275 2024-04-28T08:14:17+00:00 Sex-specific life history strategies in capelin ( Mallotus villosus )? Huse, Geir 1998 http://dx.doi.org/10.1139/f97-275 http://www.nrcresearchpress.com/doi/pdf/10.1139/f97-275 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 55, issue 3, page 631-638 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1998 crcansciencepubl https://doi.org/10.1139/f97-275 2024-04-09T06:56:26Z The life history of capelin (Mallotus villosus) is presently suggested to be sex specific: while males follow a semelparous batch-spawning strategy, females are iteroparous. This hypothesis is based on predictions from a life history simulation model of Barents Sea capelin that shows that iteroparity is more profitable than semelparity for females, but for males, semelparity with several matings with females may be as profitable as iteroparity. These predictions are supported by (i) reports of males mating with several females during a spawning season, (ii) males having a lower gonadosomatic index than females and instead spending their energy on mating and somatic growth, and (iii) an observed higher mortality for males after spawning. The Darwinian fitness of female capelin is limited by the amount of eggs they can carry, and offspring production may only be increased by undertaking several spawning seasons with yearly intervals. Added together, these indices suggest that male and female capelin follow different life history strategies. Article in Journal/Newspaper Barents Sea Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 55 3 631 638 |
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Open Polar |
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Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Huse, Geir Sex-specific life history strategies in capelin ( Mallotus villosus )? |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
The life history of capelin (Mallotus villosus) is presently suggested to be sex specific: while males follow a semelparous batch-spawning strategy, females are iteroparous. This hypothesis is based on predictions from a life history simulation model of Barents Sea capelin that shows that iteroparity is more profitable than semelparity for females, but for males, semelparity with several matings with females may be as profitable as iteroparity. These predictions are supported by (i) reports of males mating with several females during a spawning season, (ii) males having a lower gonadosomatic index than females and instead spending their energy on mating and somatic growth, and (iii) an observed higher mortality for males after spawning. The Darwinian fitness of female capelin is limited by the amount of eggs they can carry, and offspring production may only be increased by undertaking several spawning seasons with yearly intervals. Added together, these indices suggest that male and female capelin follow different life history strategies. |
format |
Article in Journal/Newspaper |
author |
Huse, Geir |
author_facet |
Huse, Geir |
author_sort |
Huse, Geir |
title |
Sex-specific life history strategies in capelin ( Mallotus villosus )? |
title_short |
Sex-specific life history strategies in capelin ( Mallotus villosus )? |
title_full |
Sex-specific life history strategies in capelin ( Mallotus villosus )? |
title_fullStr |
Sex-specific life history strategies in capelin ( Mallotus villosus )? |
title_full_unstemmed |
Sex-specific life history strategies in capelin ( Mallotus villosus )? |
title_sort |
sex-specific life history strategies in capelin ( mallotus villosus )? |
publisher |
Canadian Science Publishing |
publishDate |
1998 |
url |
http://dx.doi.org/10.1139/f97-275 http://www.nrcresearchpress.com/doi/pdf/10.1139/f97-275 |
genre |
Barents Sea |
genre_facet |
Barents Sea |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 55, issue 3, page 631-638 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f97-275 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
55 |
container_issue |
3 |
container_start_page |
631 |
op_container_end_page |
638 |
_version_ |
1797580420407099392 |