The effects of reversal of seasonal changes in photoperiod on the growth and food consumption of cod, Gadus morhua L.
The effect of reversing the natural seasonal change in photoperiod on the feeding and growth of juvenile cod, Gadus morhua . was investigated in two experiments. In an experiment conducted in spring no photoperiod effects on overall growth and food consumption were observed; however, tissue analysis...
Published in: | Journal of Fish Biology |
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Language: | English |
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Wiley
1988
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Online Access: | http://dx.doi.org/10.1111/j.1095-8649.1988.tb05417.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1988.tb05417.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1988.tb05417.x |
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crwiley:10.1111/j.1095-8649.1988.tb05417.x 2023-12-03T10:22:51+01:00 The effects of reversal of seasonal changes in photoperiod on the growth and food consumption of cod, Gadus morhua L. Hall, S. J. 1988 http://dx.doi.org/10.1111/j.1095-8649.1988.tb05417.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1988.tb05417.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1988.tb05417.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Fish Biology volume 32, issue 5, page 783-792 ISSN 0022-1112 1095-8649 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1988 crwiley https://doi.org/10.1111/j.1095-8649.1988.tb05417.x 2023-11-09T14:15:47Z The effect of reversing the natural seasonal change in photoperiod on the feeding and growth of juvenile cod, Gadus morhua . was investigated in two experiments. In an experiment conducted in spring no photoperiod effects on overall growth and food consumption were observed; however, tissue analysis at the end of the experiment showed that treatment groups differed significantly in their muscle water content. A repeat experiment conducted in early winter similarly failed to reveal an effect of photoperiod reversal on overall growth and feeding, although a very marked decline in growth rate was observed for all fish. The decline in growth rate observed in the second experiment cannot be accounted for by any changes in experimental procedure and is interpreted as possible evidence for an endogenous circa‐annual rhythm in growth rate. Article in Journal/Newspaper Gadus morhua Wiley Online Library (via Crossref) Journal of Fish Biology 32 5 783 792 |
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 Hall, S. J. The effects of reversal of seasonal changes in photoperiod on the growth and food consumption of cod, Gadus morhua L. |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
The effect of reversing the natural seasonal change in photoperiod on the feeding and growth of juvenile cod, Gadus morhua . was investigated in two experiments. In an experiment conducted in spring no photoperiod effects on overall growth and food consumption were observed; however, tissue analysis at the end of the experiment showed that treatment groups differed significantly in their muscle water content. A repeat experiment conducted in early winter similarly failed to reveal an effect of photoperiod reversal on overall growth and feeding, although a very marked decline in growth rate was observed for all fish. The decline in growth rate observed in the second experiment cannot be accounted for by any changes in experimental procedure and is interpreted as possible evidence for an endogenous circa‐annual rhythm in growth rate. |
format |
Article in Journal/Newspaper |
author |
Hall, S. J. |
author_facet |
Hall, S. J. |
author_sort |
Hall, S. J. |
title |
The effects of reversal of seasonal changes in photoperiod on the growth and food consumption of cod, Gadus morhua L. |
title_short |
The effects of reversal of seasonal changes in photoperiod on the growth and food consumption of cod, Gadus morhua L. |
title_full |
The effects of reversal of seasonal changes in photoperiod on the growth and food consumption of cod, Gadus morhua L. |
title_fullStr |
The effects of reversal of seasonal changes in photoperiod on the growth and food consumption of cod, Gadus morhua L. |
title_full_unstemmed |
The effects of reversal of seasonal changes in photoperiod on the growth and food consumption of cod, Gadus morhua L. |
title_sort |
effects of reversal of seasonal changes in photoperiod on the growth and food consumption of cod, gadus morhua l. |
publisher |
Wiley |
publishDate |
1988 |
url |
http://dx.doi.org/10.1111/j.1095-8649.1988.tb05417.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1988.tb05417.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1988.tb05417.x |
genre |
Gadus morhua |
genre_facet |
Gadus morhua |
op_source |
Journal of Fish Biology volume 32, issue 5, page 783-792 ISSN 0022-1112 1095-8649 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1095-8649.1988.tb05417.x |
container_title |
Journal of Fish Biology |
container_volume |
32 |
container_issue |
5 |
container_start_page |
783 |
op_container_end_page |
792 |
_version_ |
1784270852821352448 |