Daily feeding rhythms in Atlantic salmon II: size‐related variation in feeding patterns of post‐smolts under constant environmental conditions
Previous studies of feeding rhythms in post‐smolt Atlantic salmon Salmo salar have produced variable results. Therefore, the present study was performed to clarify the source of these differences and to examine size‐related variation in daily feeding patterns. A small group of hatchery reared post‐s...
Published in: | Journal of Fish Biology |
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Language: | English |
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Online Access: | http://dx.doi.org/10.1111/j.1095-8649.1997.tb01358.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1997.tb01358.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1997.tb01358.x |
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crwiley:10.1111/j.1095-8649.1997.tb01358.x 2024-06-02T08:03:33+00:00 Daily feeding rhythms in Atlantic salmon II: size‐related variation in feeding patterns of post‐smolts under constant environmental conditions Kadri, S. Metcalfe, N. B. Huntingford, F. A. Thorpe, J. E. 1997 http://dx.doi.org/10.1111/j.1095-8649.1997.tb01358.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1997.tb01358.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1997.tb01358.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Fish Biology volume 50, issue 2, page 273-279 ISSN 0022-1112 1095-8649 journal-article 1997 crwiley https://doi.org/10.1111/j.1095-8649.1997.tb01358.x 2024-05-03T11:35:49Z Previous studies of feeding rhythms in post‐smolt Atlantic salmon Salmo salar have produced variable results. Therefore, the present study was performed to clarify the source of these differences and to examine size‐related variation in daily feeding patterns. A small group of hatchery reared post‐smolts was kept in an indoor seawater tank under conditions of constant photoperiod and light intensity, and negligible diurnal variation in water temperature. Feeding responses were monitored by video camera throughout the day. The resultant feeding pattern for the population mirrored an earlier study, with the highest levels of feeding activity in the early morning and late evening. Differences between this and other studies may be due to variation in climate, season or life‐history stage. Daily feeding patterns were size‐dependent. The largest fish fed at a relatively constant level through the day, medium‐sized fish fed in a pattern similar to that described above for the population and small fish fed most at first and last light. These differences were due probably to the effect of competitive interactions upon fish of different sizes. Article in Journal/Newspaper Atlantic salmon Salmo salar Wiley Online Library Journal of Fish Biology 50 2 273 279 |
institution |
Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
Previous studies of feeding rhythms in post‐smolt Atlantic salmon Salmo salar have produced variable results. Therefore, the present study was performed to clarify the source of these differences and to examine size‐related variation in daily feeding patterns. A small group of hatchery reared post‐smolts was kept in an indoor seawater tank under conditions of constant photoperiod and light intensity, and negligible diurnal variation in water temperature. Feeding responses were monitored by video camera throughout the day. The resultant feeding pattern for the population mirrored an earlier study, with the highest levels of feeding activity in the early morning and late evening. Differences between this and other studies may be due to variation in climate, season or life‐history stage. Daily feeding patterns were size‐dependent. The largest fish fed at a relatively constant level through the day, medium‐sized fish fed in a pattern similar to that described above for the population and small fish fed most at first and last light. These differences were due probably to the effect of competitive interactions upon fish of different sizes. |
format |
Article in Journal/Newspaper |
author |
Kadri, S. Metcalfe, N. B. Huntingford, F. A. Thorpe, J. E. |
spellingShingle |
Kadri, S. Metcalfe, N. B. Huntingford, F. A. Thorpe, J. E. Daily feeding rhythms in Atlantic salmon II: size‐related variation in feeding patterns of post‐smolts under constant environmental conditions |
author_facet |
Kadri, S. Metcalfe, N. B. Huntingford, F. A. Thorpe, J. E. |
author_sort |
Kadri, S. |
title |
Daily feeding rhythms in Atlantic salmon II: size‐related variation in feeding patterns of post‐smolts under constant environmental conditions |
title_short |
Daily feeding rhythms in Atlantic salmon II: size‐related variation in feeding patterns of post‐smolts under constant environmental conditions |
title_full |
Daily feeding rhythms in Atlantic salmon II: size‐related variation in feeding patterns of post‐smolts under constant environmental conditions |
title_fullStr |
Daily feeding rhythms in Atlantic salmon II: size‐related variation in feeding patterns of post‐smolts under constant environmental conditions |
title_full_unstemmed |
Daily feeding rhythms in Atlantic salmon II: size‐related variation in feeding patterns of post‐smolts under constant environmental conditions |
title_sort |
daily feeding rhythms in atlantic salmon ii: size‐related variation in feeding patterns of post‐smolts under constant environmental conditions |
publisher |
Wiley |
publishDate |
1997 |
url |
http://dx.doi.org/10.1111/j.1095-8649.1997.tb01358.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1997.tb01358.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1997.tb01358.x |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Journal of Fish Biology volume 50, issue 2, page 273-279 ISSN 0022-1112 1095-8649 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1095-8649.1997.tb01358.x |
container_title |
Journal of Fish Biology |
container_volume |
50 |
container_issue |
2 |
container_start_page |
273 |
op_container_end_page |
279 |
_version_ |
1800748097409646592 |