Influence of maturity status on the annual cycles of feeding and growth in Arctic charr reared at constant temperature
Temporal changes in feeding and growth of immature (1 +), maturing male (1 +), and mature male and female (3+) Arctic charr were studied by monitoring feed intake and growth of individually‐marked fish for over 1 year. The fish were held at a constant temperature (4°C) under conditions of liberal fe...
Published in: | Journal of Fish Biology |
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Language: | English |
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Wiley
1996
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Online Access: | http://dx.doi.org/10.1111/j.1095-8649.1996.tb01486.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1996.tb01486.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1996.tb01486.x |
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crwiley:10.1111/j.1095-8649.1996.tb01486.x 2024-06-02T08:00:05+00:00 Influence of maturity status on the annual cycles of feeding and growth in Arctic charr reared at constant temperature Tveiten, H. Johnsen, H. K. Jobling, M. 1996 http://dx.doi.org/10.1111/j.1095-8649.1996.tb01486.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1996.tb01486.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1996.tb01486.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Fish Biology volume 48, issue 5, page 910-924 ISSN 0022-1112 1095-8649 journal-article 1996 crwiley https://doi.org/10.1111/j.1095-8649.1996.tb01486.x 2024-05-03T11:56:33Z Temporal changes in feeding and growth of immature (1 +), maturing male (1 +), and mature male and female (3+) Arctic charr were studied by monitoring feed intake and growth of individually‐marked fish for over 1 year. The fish were held at a constant temperature (4°C) under conditions of liberal feed supply. Feed intake and growth remained low in the period December‐April, with only 20–60% of the fish having fed on each occasion that feed intake was monitored. Feed intake and growth increased markedly during the late spring and summer, but the increases were delayed by approximately 1–2 months in the immature fish compared with their maturing counterparts. Maturing fish decreased feeding during the late summer and by September there had been an almost complete cessation of feeding. This was reflected in changes in fish body weight and condition, both of which declined from August‐September onwards. By contrast, the immature fish peaked in weight and condition in September, and weight loss during the autumn tended to be less rapid than observed for the maturing fish. The fish appeared to reduce feeding once a‘threshold condition’ of 1–4—1–5 had been attained. It is suggested that the fish may become anorexic once there has been replenishment of the energy reserves required for overwintering and, in the case of maturing individuals, for the completion of gonadal growth and Spawning. Article in Journal/Newspaper Arctic charr Arctic Wiley Online Library Arctic Journal of Fish Biology 48 5 910 924 |
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Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Temporal changes in feeding and growth of immature (1 +), maturing male (1 +), and mature male and female (3+) Arctic charr were studied by monitoring feed intake and growth of individually‐marked fish for over 1 year. The fish were held at a constant temperature (4°C) under conditions of liberal feed supply. Feed intake and growth remained low in the period December‐April, with only 20–60% of the fish having fed on each occasion that feed intake was monitored. Feed intake and growth increased markedly during the late spring and summer, but the increases were delayed by approximately 1–2 months in the immature fish compared with their maturing counterparts. Maturing fish decreased feeding during the late summer and by September there had been an almost complete cessation of feeding. This was reflected in changes in fish body weight and condition, both of which declined from August‐September onwards. By contrast, the immature fish peaked in weight and condition in September, and weight loss during the autumn tended to be less rapid than observed for the maturing fish. The fish appeared to reduce feeding once a‘threshold condition’ of 1–4—1–5 had been attained. It is suggested that the fish may become anorexic once there has been replenishment of the energy reserves required for overwintering and, in the case of maturing individuals, for the completion of gonadal growth and Spawning. |
format |
Article in Journal/Newspaper |
author |
Tveiten, H. Johnsen, H. K. Jobling, M. |
spellingShingle |
Tveiten, H. Johnsen, H. K. Jobling, M. Influence of maturity status on the annual cycles of feeding and growth in Arctic charr reared at constant temperature |
author_facet |
Tveiten, H. Johnsen, H. K. Jobling, M. |
author_sort |
Tveiten, H. |
title |
Influence of maturity status on the annual cycles of feeding and growth in Arctic charr reared at constant temperature |
title_short |
Influence of maturity status on the annual cycles of feeding and growth in Arctic charr reared at constant temperature |
title_full |
Influence of maturity status on the annual cycles of feeding and growth in Arctic charr reared at constant temperature |
title_fullStr |
Influence of maturity status on the annual cycles of feeding and growth in Arctic charr reared at constant temperature |
title_full_unstemmed |
Influence of maturity status on the annual cycles of feeding and growth in Arctic charr reared at constant temperature |
title_sort |
influence of maturity status on the annual cycles of feeding and growth in arctic charr reared at constant temperature |
publisher |
Wiley |
publishDate |
1996 |
url |
http://dx.doi.org/10.1111/j.1095-8649.1996.tb01486.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1996.tb01486.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1996.tb01486.x |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic charr Arctic |
genre_facet |
Arctic charr Arctic |
op_source |
Journal of Fish Biology volume 48, issue 5, page 910-924 ISSN 0022-1112 1095-8649 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1095-8649.1996.tb01486.x |
container_title |
Journal of Fish Biology |
container_volume |
48 |
container_issue |
5 |
container_start_page |
910 |
op_container_end_page |
924 |
_version_ |
1800744100846108672 |