Buoyancy of Atlantic cod larvae in relation to developmental stage and maternal influences
In this experimental study on Atlantic cod, Gadus morhua, buoyancy was found to vary significantly with season, developmental stage, egg size and maternal condition. Before the start of the experiments, wild fish were caught in the Barents Sea and acclimatized to laboratory conditions. Pairs (n = 8)...
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2003
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fthighwire:oai:open-archive.highwire.org:plankt:25/3/291 2023-05-15T15:27:09+02:00 Buoyancy of Atlantic cod larvae in relation to developmental stage and maternal influences Saborido-Rey, F. Kjesbu, O. S. Thorsen, A. 2003-03-01 00:00:00.0 text/html http://plankt.oxfordjournals.org/cgi/content/short/25/3/291 https://doi.org/10.1093/plankt/25.3.291 en eng Oxford University Press http://plankt.oxfordjournals.org/cgi/content/short/25/3/291 http://dx.doi.org/10.1093/plankt/25.3.291 Copyright (C) 2003, Oxford University Press ORIGINAL ARTICLES TEXT 2003 fthighwire https://doi.org/10.1093/plankt/25.3.291 2013-05-26T15:13:53Z In this experimental study on Atlantic cod, Gadus morhua, buoyancy was found to vary significantly with season, developmental stage, egg size and maternal condition. Before the start of the experiments, wild fish were caught in the Barents Sea and acclimatized to laboratory conditions. Pairs (n = 8), one female (recruit spawner) and one male, spawned naturally in large, indoor compartments of a circular tank and every third egg batch (out of up to 19 batches collected per female) was incubated in aquaria. Following sedation (50 mg l−1metomidate hydrochloride, 30 min), individual larval specific gravity was precisely reported (30 min) using a density-graduated column. Larval specific gravity (meanσ t ) increased steadily during the first early stages of development (0–25 day-degrees), remained nearly constant during the following stages (25–35 day-degrees), but then decreased gradually (35–55 day-degrees). In general, late-season larvae were significantly less buoyant, i.e. showed higher meanσ t , than early-season larvae. Meanσ t was negatively correlated with female condition and egg size and dry weight. Possible implications of these findings for drift and survival are discussed. Text atlantic cod Barents Sea Gadus morhua HighWire Press (Stanford University) Barents Sea Journal of Plankton Research 25 3 291 307 |
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HighWire Press (Stanford University) |
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language |
English |
topic |
ORIGINAL ARTICLES |
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ORIGINAL ARTICLES Saborido-Rey, F. Kjesbu, O. S. Thorsen, A. Buoyancy of Atlantic cod larvae in relation to developmental stage and maternal influences |
topic_facet |
ORIGINAL ARTICLES |
description |
In this experimental study on Atlantic cod, Gadus morhua, buoyancy was found to vary significantly with season, developmental stage, egg size and maternal condition. Before the start of the experiments, wild fish were caught in the Barents Sea and acclimatized to laboratory conditions. Pairs (n = 8), one female (recruit spawner) and one male, spawned naturally in large, indoor compartments of a circular tank and every third egg batch (out of up to 19 batches collected per female) was incubated in aquaria. Following sedation (50 mg l−1metomidate hydrochloride, 30 min), individual larval specific gravity was precisely reported (30 min) using a density-graduated column. Larval specific gravity (meanσ t ) increased steadily during the first early stages of development (0–25 day-degrees), remained nearly constant during the following stages (25–35 day-degrees), but then decreased gradually (35–55 day-degrees). In general, late-season larvae were significantly less buoyant, i.e. showed higher meanσ t , than early-season larvae. Meanσ t was negatively correlated with female condition and egg size and dry weight. Possible implications of these findings for drift and survival are discussed. |
format |
Text |
author |
Saborido-Rey, F. Kjesbu, O. S. Thorsen, A. |
author_facet |
Saborido-Rey, F. Kjesbu, O. S. Thorsen, A. |
author_sort |
Saborido-Rey, F. |
title |
Buoyancy of Atlantic cod larvae in relation to developmental stage and maternal influences |
title_short |
Buoyancy of Atlantic cod larvae in relation to developmental stage and maternal influences |
title_full |
Buoyancy of Atlantic cod larvae in relation to developmental stage and maternal influences |
title_fullStr |
Buoyancy of Atlantic cod larvae in relation to developmental stage and maternal influences |
title_full_unstemmed |
Buoyancy of Atlantic cod larvae in relation to developmental stage and maternal influences |
title_sort |
buoyancy of atlantic cod larvae in relation to developmental stage and maternal influences |
publisher |
Oxford University Press |
publishDate |
2003 |
url |
http://plankt.oxfordjournals.org/cgi/content/short/25/3/291 https://doi.org/10.1093/plankt/25.3.291 |
geographic |
Barents Sea |
geographic_facet |
Barents Sea |
genre |
atlantic cod Barents Sea Gadus morhua |
genre_facet |
atlantic cod Barents Sea Gadus morhua |
op_relation |
http://plankt.oxfordjournals.org/cgi/content/short/25/3/291 http://dx.doi.org/10.1093/plankt/25.3.291 |
op_rights |
Copyright (C) 2003, Oxford University Press |
op_doi |
https://doi.org/10.1093/plankt/25.3.291 |
container_title |
Journal of Plankton Research |
container_volume |
25 |
container_issue |
3 |
container_start_page |
291 |
op_container_end_page |
307 |
_version_ |
1766357601730166784 |