Survival, activity and feeding ability of Baltic cod ( Gadus morhua ) yolk‐sac larvae at different salinities
Due to unfavourable conditions (declines in salinity and water oxygen content) in the spawning areas, there has been a considerable decrease in the Baltic cod stock since the beginning of the 1980s, and consequently a decrease in catches. In order to examine the feasibility of introducing yolk‐sac l...
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crwiley:10.1111/j.1095-8649.1994.tb01326.x 2023-12-03T10:22:55+01:00 Survival, activity and feeding ability of Baltic cod ( Gadus morhua ) yolk‐sac larvae at different salinities Nissling, Anders Solemdal, Per Svensson, Mikael Westin, Lars 1994 http://dx.doi.org/10.1111/j.1095-8649.1994.tb01326.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1994.tb01326.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1994.tb01326.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Fish Biology volume 45, issue 3, page 435-445 ISSN 0022-1112 1095-8649 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1994 crwiley https://doi.org/10.1111/j.1095-8649.1994.tb01326.x 2023-11-09T13:45:08Z Due to unfavourable conditions (declines in salinity and water oxygen content) in the spawning areas, there has been a considerable decrease in the Baltic cod stock since the beginning of the 1980s, and consequently a decrease in catches. In order to examine the feasibility of introducing yolk‐sac larvae in areas of low salinity to improve the stock, laboratory experiments were performed on the effects of salinity on the survival, level of activity and feeding ability of larvae. Yolk‐sac larvae from spawning cod caught off northern Gotland, Sweden, were exposed to four different salinities: 10 and 15%○ (salinities of the main spawning areas); and 5 and 7%○ (salinities in the Bothnian Sea and the Baltic proper respectively). The survival of yolk‐sac larvae was high at all salinities, even though there was an indication of higher mortality at low salinities in less viable larval groups. No differences were found in swimming speed or feeding ability at the four salinities, but a significant difference in vertical distribution was recorded. There were significant differences in survival, vertical distribution and feeding ability among larval groups, which indicates that larval quality or viability is of greater importance for larval survival than salinity, in the range of 5–15%○. Article in Journal/Newspaper Gadus morhua Wiley Online Library (via Crossref) Journal of Fish Biology 45 3 435 445 |
institution |
Open Polar |
collection |
Wiley Online Library (via Crossref) |
op_collection_id |
crwiley |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Nissling, Anders Solemdal, Per Svensson, Mikael Westin, Lars Survival, activity and feeding ability of Baltic cod ( Gadus morhua ) yolk‐sac larvae at different salinities |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Due to unfavourable conditions (declines in salinity and water oxygen content) in the spawning areas, there has been a considerable decrease in the Baltic cod stock since the beginning of the 1980s, and consequently a decrease in catches. In order to examine the feasibility of introducing yolk‐sac larvae in areas of low salinity to improve the stock, laboratory experiments were performed on the effects of salinity on the survival, level of activity and feeding ability of larvae. Yolk‐sac larvae from spawning cod caught off northern Gotland, Sweden, were exposed to four different salinities: 10 and 15%○ (salinities of the main spawning areas); and 5 and 7%○ (salinities in the Bothnian Sea and the Baltic proper respectively). The survival of yolk‐sac larvae was high at all salinities, even though there was an indication of higher mortality at low salinities in less viable larval groups. No differences were found in swimming speed or feeding ability at the four salinities, but a significant difference in vertical distribution was recorded. There were significant differences in survival, vertical distribution and feeding ability among larval groups, which indicates that larval quality or viability is of greater importance for larval survival than salinity, in the range of 5–15%○. |
format |
Article in Journal/Newspaper |
author |
Nissling, Anders Solemdal, Per Svensson, Mikael Westin, Lars |
author_facet |
Nissling, Anders Solemdal, Per Svensson, Mikael Westin, Lars |
author_sort |
Nissling, Anders |
title |
Survival, activity and feeding ability of Baltic cod ( Gadus morhua ) yolk‐sac larvae at different salinities |
title_short |
Survival, activity and feeding ability of Baltic cod ( Gadus morhua ) yolk‐sac larvae at different salinities |
title_full |
Survival, activity and feeding ability of Baltic cod ( Gadus morhua ) yolk‐sac larvae at different salinities |
title_fullStr |
Survival, activity and feeding ability of Baltic cod ( Gadus morhua ) yolk‐sac larvae at different salinities |
title_full_unstemmed |
Survival, activity and feeding ability of Baltic cod ( Gadus morhua ) yolk‐sac larvae at different salinities |
title_sort |
survival, activity and feeding ability of baltic cod ( gadus morhua ) yolk‐sac larvae at different salinities |
publisher |
Wiley |
publishDate |
1994 |
url |
http://dx.doi.org/10.1111/j.1095-8649.1994.tb01326.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1994.tb01326.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1994.tb01326.x |
genre |
Gadus morhua |
genre_facet |
Gadus morhua |
op_source |
Journal of Fish Biology volume 45, issue 3, page 435-445 ISSN 0022-1112 1095-8649 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1095-8649.1994.tb01326.x |
container_title |
Journal of Fish Biology |
container_volume |
45 |
container_issue |
3 |
container_start_page |
435 |
op_container_end_page |
445 |
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1784270926839283712 |