The expression of secondary sexual characteristics in recruit- and repeat-spawning farmed and wild Atlantic cod (Gadus morhua)
We examined the expression of the two known secondary sexual characteristics of Atlantic cod, the pelvic fin and the drumming muscle, in farmed and wild cod stemming from the same population. Farmed and wild males had longer pelvic fins and larger drumming muscles than females, but wild cod had long...
Published in: | ICES Journal of Marine Science |
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Language: | English |
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Oxford University Press
2008
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Online Access: | https://doi.org/10.1093/icesjms/fsn147 |
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ftunivscoast:usc:6914 2023-05-15T15:26:59+02:00 The expression of secondary sexual characteristics in recruit- and repeat-spawning farmed and wild Atlantic cod (Gadus morhua) Skjæraasen, J E Meager, J J Karlsen, Ø 2008 https://doi.org/10.1093/icesjms/fsn147 eng eng Oxford University Press usc:6914 URN:ISSN: 1054-3139 FoR 0704 (Fisheries Sciences) Atlantic cod farmed cod sexual characteristics spawning Journal Article 2008 ftunivscoast https://doi.org/10.1093/icesjms/fsn147 2020-05-18T22:26:07Z We examined the expression of the two known secondary sexual characteristics of Atlantic cod, the pelvic fin and the drumming muscle, in farmed and wild cod stemming from the same population. Farmed and wild males had longer pelvic fins and larger drumming muscles than females, but wild cod had longer fins than farmed cod. The size of the drumming muscle of males was similar among wild and farmed cod, but farmed females had smaller muscles than their wild counterparts. Repeat-spawning wild males tended to invest less in drumming-muscle mass and more in pelvic-fin growth than recruit-spawning fish, whereas the reverse was true for farmed males. Males use pelvic fins to embrace females during ventral mounts, a key mating behaviour, and display them to other males during agonistic interactions. The drumming muscle is used by males to produce sound during courtship and aggressive displays, whereas females only use sound outside the spawning season, for agonistic and defensive behaviours that are unlikely to be as important in the farming environment. The results are discussed in the context of the reproductive success of farmed escapees in the wild. Article in Journal/Newspaper atlantic cod Gadus morhua University of the Sunshine Coast, Queensland, Australia: COAST Research Database ICES Journal of Marine Science 65 9 1710 1716 |
institution |
Open Polar |
collection |
University of the Sunshine Coast, Queensland, Australia: COAST Research Database |
op_collection_id |
ftunivscoast |
language |
English |
topic |
FoR 0704 (Fisheries Sciences) Atlantic cod farmed cod sexual characteristics spawning |
spellingShingle |
FoR 0704 (Fisheries Sciences) Atlantic cod farmed cod sexual characteristics spawning Skjæraasen, J E Meager, J J Karlsen, Ø The expression of secondary sexual characteristics in recruit- and repeat-spawning farmed and wild Atlantic cod (Gadus morhua) |
topic_facet |
FoR 0704 (Fisheries Sciences) Atlantic cod farmed cod sexual characteristics spawning |
description |
We examined the expression of the two known secondary sexual characteristics of Atlantic cod, the pelvic fin and the drumming muscle, in farmed and wild cod stemming from the same population. Farmed and wild males had longer pelvic fins and larger drumming muscles than females, but wild cod had longer fins than farmed cod. The size of the drumming muscle of males was similar among wild and farmed cod, but farmed females had smaller muscles than their wild counterparts. Repeat-spawning wild males tended to invest less in drumming-muscle mass and more in pelvic-fin growth than recruit-spawning fish, whereas the reverse was true for farmed males. Males use pelvic fins to embrace females during ventral mounts, a key mating behaviour, and display them to other males during agonistic interactions. The drumming muscle is used by males to produce sound during courtship and aggressive displays, whereas females only use sound outside the spawning season, for agonistic and defensive behaviours that are unlikely to be as important in the farming environment. The results are discussed in the context of the reproductive success of farmed escapees in the wild. |
format |
Article in Journal/Newspaper |
author |
Skjæraasen, J E Meager, J J Karlsen, Ø |
author_facet |
Skjæraasen, J E Meager, J J Karlsen, Ø |
author_sort |
Skjæraasen, J E |
title |
The expression of secondary sexual characteristics in recruit- and repeat-spawning farmed and wild Atlantic cod (Gadus morhua) |
title_short |
The expression of secondary sexual characteristics in recruit- and repeat-spawning farmed and wild Atlantic cod (Gadus morhua) |
title_full |
The expression of secondary sexual characteristics in recruit- and repeat-spawning farmed and wild Atlantic cod (Gadus morhua) |
title_fullStr |
The expression of secondary sexual characteristics in recruit- and repeat-spawning farmed and wild Atlantic cod (Gadus morhua) |
title_full_unstemmed |
The expression of secondary sexual characteristics in recruit- and repeat-spawning farmed and wild Atlantic cod (Gadus morhua) |
title_sort |
expression of secondary sexual characteristics in recruit- and repeat-spawning farmed and wild atlantic cod (gadus morhua) |
publisher |
Oxford University Press |
publishDate |
2008 |
url |
https://doi.org/10.1093/icesjms/fsn147 |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_relation |
usc:6914 URN:ISSN: 1054-3139 |
op_doi |
https://doi.org/10.1093/icesjms/fsn147 |
container_title |
ICES Journal of Marine Science |
container_volume |
65 |
container_issue |
9 |
container_start_page |
1710 |
op_container_end_page |
1716 |
_version_ |
1766357450312646656 |