The detection of dissolved amino acids by the Atlantic cod, Gadus morhua L.
A classical conditioning technique was employed with cod, Gadus morhua L., to determine thresholds for the detection of the L‐forms of some α amino acids which are thought to be attractants or feeding stimulants for fish. The amino acids investigated, in order of effectiveness, were tyrosine, cystei...
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crwiley:10.1111/j.1095-8649.1980.tb02755.x 2024-06-02T08:03:12+00:00 The detection of dissolved amino acids by the Atlantic cod, Gadus morhua L. Johnstone, A. D. F. 1980 http://dx.doi.org/10.1111/j.1095-8649.1980.tb02755.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1980.tb02755.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1980.tb02755.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Fish Biology volume 17, issue 2, page 219-230 ISSN 0022-1112 1095-8649 journal-article 1980 crwiley https://doi.org/10.1111/j.1095-8649.1980.tb02755.x 2024-05-03T11:32:25Z A classical conditioning technique was employed with cod, Gadus morhua L., to determine thresholds for the detection of the L‐forms of some α amino acids which are thought to be attractants or feeding stimulants for fish. The amino acids investigated, in order of effectiveness, were tyrosine, cysteine, phenylalanine, glycine and methionine with mean threshold response levels ranging from 2·5 × 10 ‐8 M to 7·4 × 10 ‐8 M. Histidine and lysine resulted in similar thresholds with a mean value of approximately 3 ± 10 ‐7 M while taurine and leucine were least effective with mean threshold levels of 2·1 × 10 ‐6 M and 2·1 × 10 ‐5 M respectively. Comparison is made with electrophysiological and behavioural response data from other species. The effect of raising the background level of glycine on the threshold to glycine for cod is described. The results are discussed with reference to data on levels of dissolved free amino acids in shallow sea waters which may have a bearing on determining chemosensory threshold levels. To detect a specific amino acid against a background level of the same substance the difference in level for detection is proportionally greater for higher background concentrations. Article in Journal/Newspaper atlantic cod Gadus morhua Wiley Online Library Journal of Fish Biology 17 2 219 230 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
A classical conditioning technique was employed with cod, Gadus morhua L., to determine thresholds for the detection of the L‐forms of some α amino acids which are thought to be attractants or feeding stimulants for fish. The amino acids investigated, in order of effectiveness, were tyrosine, cysteine, phenylalanine, glycine and methionine with mean threshold response levels ranging from 2·5 × 10 ‐8 M to 7·4 × 10 ‐8 M. Histidine and lysine resulted in similar thresholds with a mean value of approximately 3 ± 10 ‐7 M while taurine and leucine were least effective with mean threshold levels of 2·1 × 10 ‐6 M and 2·1 × 10 ‐5 M respectively. Comparison is made with electrophysiological and behavioural response data from other species. The effect of raising the background level of glycine on the threshold to glycine for cod is described. The results are discussed with reference to data on levels of dissolved free amino acids in shallow sea waters which may have a bearing on determining chemosensory threshold levels. To detect a specific amino acid against a background level of the same substance the difference in level for detection is proportionally greater for higher background concentrations. |
format |
Article in Journal/Newspaper |
author |
Johnstone, A. D. F. |
spellingShingle |
Johnstone, A. D. F. The detection of dissolved amino acids by the Atlantic cod, Gadus morhua L. |
author_facet |
Johnstone, A. D. F. |
author_sort |
Johnstone, A. D. F. |
title |
The detection of dissolved amino acids by the Atlantic cod, Gadus morhua L. |
title_short |
The detection of dissolved amino acids by the Atlantic cod, Gadus morhua L. |
title_full |
The detection of dissolved amino acids by the Atlantic cod, Gadus morhua L. |
title_fullStr |
The detection of dissolved amino acids by the Atlantic cod, Gadus morhua L. |
title_full_unstemmed |
The detection of dissolved amino acids by the Atlantic cod, Gadus morhua L. |
title_sort |
detection of dissolved amino acids by the atlantic cod, gadus morhua l. |
publisher |
Wiley |
publishDate |
1980 |
url |
http://dx.doi.org/10.1111/j.1095-8649.1980.tb02755.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1980.tb02755.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1980.tb02755.x |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_source |
Journal of Fish Biology volume 17, issue 2, page 219-230 ISSN 0022-1112 1095-8649 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1095-8649.1980.tb02755.x |
container_title |
Journal of Fish Biology |
container_volume |
17 |
container_issue |
2 |
container_start_page |
219 |
op_container_end_page |
230 |
_version_ |
1800747675244560384 |