The expression of secondary sexual characteristics in recruit- and repeat-spawning farmed and wild Atlantic cod (Gadus morhua)
<qd> Skjæraasen, J. E., Meager, J. J., and Karlsen, Ø. 2008. The expression of secondary sexual characteristics in recruit- and repeat-spawning farmed and wild Atlantic cod ( Gadus morhua ). – ICES Journal of Marine Science, 65: 1710–1716. </qd>We examined the expression of the two known...
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2008
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fthighwire:oai:open-archive.highwire.org:icesjms:65/9/1710 2023-05-15T15:27:02+02:00 The expression of secondary sexual characteristics in recruit- and repeat-spawning farmed and wild Atlantic cod (Gadus morhua) Skjæraasen, Jon Egil Meager, Justin J. Karlsen, Ørjan 2008-12-01 00:00:00.0 text/html http://icesjms.oxfordjournals.org/cgi/content/short/65/9/1710 https://doi.org/10.1093/icesjms/fsn147 en eng Oxford University Press http://icesjms.oxfordjournals.org/cgi/content/short/65/9/1710 http://dx.doi.org/10.1093/icesjms/fsn147 Copyright (C) 2008, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer Articles TEXT 2008 fthighwire https://doi.org/10.1093/icesjms/fsn147 2008-12-25T19:55:40Z <qd> Skjæraasen, J. E., Meager, J. J., and Karlsen, Ø. 2008. The expression of secondary sexual characteristics in recruit- and repeat-spawning farmed and wild Atlantic cod ( Gadus morhua ). – ICES Journal of Marine Science, 65: 1710–1716. </qd>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. Text atlantic cod Gadus morhua HighWire Press (Stanford University) Karlsen ENVELOPE(-46.000,-46.000,-60.350,-60.350) ICES Journal of Marine Science 65 9 1710 1716 |
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Articles Skjæraasen, Jon Egil Meager, Justin J. Karlsen, Ørjan The expression of secondary sexual characteristics in recruit- and repeat-spawning farmed and wild Atlantic cod (Gadus morhua) |
topic_facet |
Articles |
description |
<qd> Skjæraasen, J. E., Meager, J. J., and Karlsen, Ø. 2008. The expression of secondary sexual characteristics in recruit- and repeat-spawning farmed and wild Atlantic cod ( Gadus morhua ). – ICES Journal of Marine Science, 65: 1710–1716. </qd>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 |
Text |
author |
Skjæraasen, Jon Egil Meager, Justin J. Karlsen, Ørjan |
author_facet |
Skjæraasen, Jon Egil Meager, Justin J. Karlsen, Ørjan |
author_sort |
Skjæraasen, Jon Egil |
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 |
http://icesjms.oxfordjournals.org/cgi/content/short/65/9/1710 https://doi.org/10.1093/icesjms/fsn147 |
long_lat |
ENVELOPE(-46.000,-46.000,-60.350,-60.350) |
geographic |
Karlsen |
geographic_facet |
Karlsen |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_relation |
http://icesjms.oxfordjournals.org/cgi/content/short/65/9/1710 http://dx.doi.org/10.1093/icesjms/fsn147 |
op_rights |
Copyright (C) 2008, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer |
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_ |
1766357490568527872 |