Feeding, Growth, and Survival of Atlantic Cod ( Gadus morhua ) Larvae Reared in Replicate Plastic Enclosures
Feeding, growth, and survival of Atlantic cod (Gadus morhua) larvae were examined during their first 2 mo of life. The experiment was carried out in eight plastic enclosures of 10 m 3 volume each. Larval cod, at an initial stocking density of 10 larvae/L, were fed rotifers (Brachionus plicatilis) an...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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1993
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Online Access: | http://dx.doi.org/10.1139/f93-105 http://www.nrcresearchpress.com/doi/pdf/10.1139/f93-105 |
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crcansciencepubl:10.1139/f93-105 2023-12-17T10:27:00+01:00 Feeding, Growth, and Survival of Atlantic Cod ( Gadus morhua ) Larvae Reared in Replicate Plastic Enclosures Otterå, Håkon 1993 http://dx.doi.org/10.1139/f93-105 http://www.nrcresearchpress.com/doi/pdf/10.1139/f93-105 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 50, issue 5, page 913-924 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1993 crcansciencepubl https://doi.org/10.1139/f93-105 2023-11-19T13:38:13Z Feeding, growth, and survival of Atlantic cod (Gadus morhua) larvae were examined during their first 2 mo of life. The experiment was carried out in eight plastic enclosures of 10 m 3 volume each. Larval cod, at an initial stocking density of 10 larvae/L, were fed rotifers (Brachionus plicatilis) and natural zooplankton collected from the sea. The enclosures replicated well with regard to hydrography, feeding conditions, and larval growth and survival. Larval mortality was low during the first month, with a mean mortality rate (Z) of 0.02/d. Growth, however, was very slow and mortality increased significantly after about 4 wk, possibly due to starvation. Brachionus plicatilis dominated the gut content during the first 3–4 wk. The zooplankton concentration averaged 15–80 rotifers/L during the first 2 wk, which seemed to be insufficient under the present rearing conditions. Most of the larvae were distributed in the upper parts of the rearing enclosures, while rotifers were distributed deeper. This, together with the high larval density, inadequate rotifer enrichment, and low temperature probably amplified the unfavourable feeding conditions. Article in Journal/Newspaper atlantic cod Gadus morhua Rotifer Canadian Science Publishing (via Crossref) Canadian Journal of Fisheries and Aquatic Sciences 50 5 913 924 |
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Open Polar |
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Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
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Aquatic Science Ecology, Evolution, Behavior and Systematics Otterå, Håkon Feeding, Growth, and Survival of Atlantic Cod ( Gadus morhua ) Larvae Reared in Replicate Plastic Enclosures |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Feeding, growth, and survival of Atlantic cod (Gadus morhua) larvae were examined during their first 2 mo of life. The experiment was carried out in eight plastic enclosures of 10 m 3 volume each. Larval cod, at an initial stocking density of 10 larvae/L, were fed rotifers (Brachionus plicatilis) and natural zooplankton collected from the sea. The enclosures replicated well with regard to hydrography, feeding conditions, and larval growth and survival. Larval mortality was low during the first month, with a mean mortality rate (Z) of 0.02/d. Growth, however, was very slow and mortality increased significantly after about 4 wk, possibly due to starvation. Brachionus plicatilis dominated the gut content during the first 3–4 wk. The zooplankton concentration averaged 15–80 rotifers/L during the first 2 wk, which seemed to be insufficient under the present rearing conditions. Most of the larvae were distributed in the upper parts of the rearing enclosures, while rotifers were distributed deeper. This, together with the high larval density, inadequate rotifer enrichment, and low temperature probably amplified the unfavourable feeding conditions. |
format |
Article in Journal/Newspaper |
author |
Otterå, Håkon |
author_facet |
Otterå, Håkon |
author_sort |
Otterå, Håkon |
title |
Feeding, Growth, and Survival of Atlantic Cod ( Gadus morhua ) Larvae Reared in Replicate Plastic Enclosures |
title_short |
Feeding, Growth, and Survival of Atlantic Cod ( Gadus morhua ) Larvae Reared in Replicate Plastic Enclosures |
title_full |
Feeding, Growth, and Survival of Atlantic Cod ( Gadus morhua ) Larvae Reared in Replicate Plastic Enclosures |
title_fullStr |
Feeding, Growth, and Survival of Atlantic Cod ( Gadus morhua ) Larvae Reared in Replicate Plastic Enclosures |
title_full_unstemmed |
Feeding, Growth, and Survival of Atlantic Cod ( Gadus morhua ) Larvae Reared in Replicate Plastic Enclosures |
title_sort |
feeding, growth, and survival of atlantic cod ( gadus morhua ) larvae reared in replicate plastic enclosures |
publisher |
Canadian Science Publishing |
publishDate |
1993 |
url |
http://dx.doi.org/10.1139/f93-105 http://www.nrcresearchpress.com/doi/pdf/10.1139/f93-105 |
genre |
atlantic cod Gadus morhua Rotifer |
genre_facet |
atlantic cod Gadus morhua Rotifer |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 50, issue 5, page 913-924 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f93-105 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
50 |
container_issue |
5 |
container_start_page |
913 |
op_container_end_page |
924 |
_version_ |
1785578774995140608 |