Morphological limitations, prey size selectivity, and growth response of juvenile atlantic salmon, Salmo salar
The head and jaw movements involved in capture, buccal manipulation, ingestion and rejection of prey were investigated using sequential photography of juvenile Atlantic salmon feeding in a simulated stream environment. The results are described and discussed and mouth breadth and gill raker spacing...
Published in: | Journal of Fish Biology |
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Language: | English |
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1979
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Online Access: | http://dx.doi.org/10.1111/j.1095-8649.1979.tb03498.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1979.tb03498.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1979.tb03498.x |
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crwiley:10.1111/j.1095-8649.1979.tb03498.x 2024-09-15T17:56:08+00:00 Morphological limitations, prey size selectivity, and growth response of juvenile atlantic salmon, Salmo salar Wañkowski, J. W. J. 1979 http://dx.doi.org/10.1111/j.1095-8649.1979.tb03498.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1979.tb03498.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1979.tb03498.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Fish Biology volume 14, issue 1, page 89-100 ISSN 0022-1112 1095-8649 journal-article 1979 crwiley https://doi.org/10.1111/j.1095-8649.1979.tb03498.x 2024-07-23T04:10:35Z The head and jaw movements involved in capture, buccal manipulation, ingestion and rejection of prey were investigated using sequential photography of juvenile Atlantic salmon feeding in a simulated stream environment. The results are described and discussed and mouth breadth and gill raker spacing are proposed as morphometric limitations to the range of prey sizes available which remains constant at 0·06 · fish fork length ( PFR ). A recirculatory flume tank was used to study prey size selectivity behavior. Simplified downstream‐drifting prey items elicited a variety of responses depending on their physical size. One hundred percent of offered prey of PFR 0·025 were ingested, while 90 % of prey at PFR 0·051 and 100% of prey at PFR 0·105 were rejected. It is demonstrated that fish show negative selection for prey sizes smaller than PFR 0·025 and that prey of this size elicits maximum growth response. The validity of the proposed morphometric limitations on the available prey sizes is demonstrated by reference to selectivity behaviour and prey size related differential growth. Article in Journal/Newspaper Atlantic salmon Salmo salar Wiley Online Library Journal of Fish Biology 14 1 89 100 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
The head and jaw movements involved in capture, buccal manipulation, ingestion and rejection of prey were investigated using sequential photography of juvenile Atlantic salmon feeding in a simulated stream environment. The results are described and discussed and mouth breadth and gill raker spacing are proposed as morphometric limitations to the range of prey sizes available which remains constant at 0·06 · fish fork length ( PFR ). A recirculatory flume tank was used to study prey size selectivity behavior. Simplified downstream‐drifting prey items elicited a variety of responses depending on their physical size. One hundred percent of offered prey of PFR 0·025 were ingested, while 90 % of prey at PFR 0·051 and 100% of prey at PFR 0·105 were rejected. It is demonstrated that fish show negative selection for prey sizes smaller than PFR 0·025 and that prey of this size elicits maximum growth response. The validity of the proposed morphometric limitations on the available prey sizes is demonstrated by reference to selectivity behaviour and prey size related differential growth. |
format |
Article in Journal/Newspaper |
author |
Wañkowski, J. W. J. |
spellingShingle |
Wañkowski, J. W. J. Morphological limitations, prey size selectivity, and growth response of juvenile atlantic salmon, Salmo salar |
author_facet |
Wañkowski, J. W. J. |
author_sort |
Wañkowski, J. W. J. |
title |
Morphological limitations, prey size selectivity, and growth response of juvenile atlantic salmon, Salmo salar |
title_short |
Morphological limitations, prey size selectivity, and growth response of juvenile atlantic salmon, Salmo salar |
title_full |
Morphological limitations, prey size selectivity, and growth response of juvenile atlantic salmon, Salmo salar |
title_fullStr |
Morphological limitations, prey size selectivity, and growth response of juvenile atlantic salmon, Salmo salar |
title_full_unstemmed |
Morphological limitations, prey size selectivity, and growth response of juvenile atlantic salmon, Salmo salar |
title_sort |
morphological limitations, prey size selectivity, and growth response of juvenile atlantic salmon, salmo salar |
publisher |
Wiley |
publishDate |
1979 |
url |
http://dx.doi.org/10.1111/j.1095-8649.1979.tb03498.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1979.tb03498.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1979.tb03498.x |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Journal of Fish Biology volume 14, issue 1, page 89-100 ISSN 0022-1112 1095-8649 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1095-8649.1979.tb03498.x |
container_title |
Journal of Fish Biology |
container_volume |
14 |
container_issue |
1 |
container_start_page |
89 |
op_container_end_page |
100 |
_version_ |
1810432339374768128 |