The relationship between acute stress, food intake, endocrine status and life history stage in juvenile farmed Atlantic salmon, Salmo salar
Different life history stages of juvenile Atlantic salmon around the period of smoltification were subjected to short term stress (confinement) over two sampling years using separate cohorts of hatchery-reared fish. In the first year, confinement stress suppressed subsequent feeding in smolts and po...
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Online Access: | http://hdl.handle.net/10072/26650 https://doi.org/10.1016/j.aquaculture.2008.01.001 |
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ftgriffithuniv:oai:research-repository.griffith.edu.au:10072/26650 2023-05-15T15:30:35+02:00 The relationship between acute stress, food intake, endocrine status and life history stage in juvenile farmed Atlantic salmon, Salmo salar Pankhurst, N. Ludke, S. King, H. Peter, R. 2008 application/pdf http://hdl.handle.net/10072/26650 https://doi.org/10.1016/j.aquaculture.2008.01.001 English en_AU eng Elsevier Aquaculture © 2008 Elsevier. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version. Comparative Physiology Journal article 2008 ftgriffithuniv https://doi.org/10.1016/j.aquaculture.2008.01.001 2018-07-30T10:46:22Z Different life history stages of juvenile Atlantic salmon around the period of smoltification were subjected to short term stress (confinement) over two sampling years using separate cohorts of hatchery-reared fish. In the first year, confinement stress suppressed subsequent feeding in smolts and post-smolts, but not parr, in association with elevated plasma cortisol levels. Post-smolts showed much lower levels of food intake than either parr or smolts. Plasma ghrelin levels were unaffected by stress in any group. In the second study year, pre-smolts had very low food intake and this was further suppressed following stress. Higher food intake levels in smolts were strongly inhibited post-stress. Both pre-smolts, and smolts showed elevated levels of plasma cortisol and glucose, and suppressed plasma ghrelin levels. Across both study years, stress that was accompanied by elevated plasma cortisol levels resulted in suppression of feeding, whereas a predicted association of suppressed plasma ghrelin levels with reduced food intake, was present only in the second year. The results of the present study indicate that elevated plasma cortisol is a consistent endocrine correlate of stress-suppression of feeding. It is also apparent that the peri-smolt period is associated with markedly reduced feeding in this stock of Atlantic salmon. Full Text Article in Journal/Newspaper Atlantic salmon Salmo salar Griffith University: Griffith Research Online Aquaculture 275 1-4 311 318 |
institution |
Open Polar |
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Griffith University: Griffith Research Online |
op_collection_id |
ftgriffithuniv |
language |
English |
topic |
Comparative Physiology |
spellingShingle |
Comparative Physiology Pankhurst, N. Ludke, S. King, H. Peter, R. The relationship between acute stress, food intake, endocrine status and life history stage in juvenile farmed Atlantic salmon, Salmo salar |
topic_facet |
Comparative Physiology |
description |
Different life history stages of juvenile Atlantic salmon around the period of smoltification were subjected to short term stress (confinement) over two sampling years using separate cohorts of hatchery-reared fish. In the first year, confinement stress suppressed subsequent feeding in smolts and post-smolts, but not parr, in association with elevated plasma cortisol levels. Post-smolts showed much lower levels of food intake than either parr or smolts. Plasma ghrelin levels were unaffected by stress in any group. In the second study year, pre-smolts had very low food intake and this was further suppressed following stress. Higher food intake levels in smolts were strongly inhibited post-stress. Both pre-smolts, and smolts showed elevated levels of plasma cortisol and glucose, and suppressed plasma ghrelin levels. Across both study years, stress that was accompanied by elevated plasma cortisol levels resulted in suppression of feeding, whereas a predicted association of suppressed plasma ghrelin levels with reduced food intake, was present only in the second year. The results of the present study indicate that elevated plasma cortisol is a consistent endocrine correlate of stress-suppression of feeding. It is also apparent that the peri-smolt period is associated with markedly reduced feeding in this stock of Atlantic salmon. Full Text |
format |
Article in Journal/Newspaper |
author |
Pankhurst, N. Ludke, S. King, H. Peter, R. |
author_facet |
Pankhurst, N. Ludke, S. King, H. Peter, R. |
author_sort |
Pankhurst, N. |
title |
The relationship between acute stress, food intake, endocrine status and life history stage in juvenile farmed Atlantic salmon, Salmo salar |
title_short |
The relationship between acute stress, food intake, endocrine status and life history stage in juvenile farmed Atlantic salmon, Salmo salar |
title_full |
The relationship between acute stress, food intake, endocrine status and life history stage in juvenile farmed Atlantic salmon, Salmo salar |
title_fullStr |
The relationship between acute stress, food intake, endocrine status and life history stage in juvenile farmed Atlantic salmon, Salmo salar |
title_full_unstemmed |
The relationship between acute stress, food intake, endocrine status and life history stage in juvenile farmed Atlantic salmon, Salmo salar |
title_sort |
relationship between acute stress, food intake, endocrine status and life history stage in juvenile farmed atlantic salmon, salmo salar |
publisher |
Elsevier |
publishDate |
2008 |
url |
http://hdl.handle.net/10072/26650 https://doi.org/10.1016/j.aquaculture.2008.01.001 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
Aquaculture |
op_rights |
© 2008 Elsevier. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version. |
op_doi |
https://doi.org/10.1016/j.aquaculture.2008.01.001 |
container_title |
Aquaculture |
container_volume |
275 |
container_issue |
1-4 |
container_start_page |
311 |
op_container_end_page |
318 |
_version_ |
1766361039398502400 |