Food consumption and growth in maturing Atlantic salmon ( Salmo salar )
Circulating levels of the steroid hormones 11-ketotestosterone (11-KT) and 17β-estradiol (E2), voluntary food intake, and growth performance were measured in individual Atlantic salmon (Salmo salar) over the year preceding their maturation as grilse. 11-KT and E2 were measured by radioimmunoassay, a...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Online Access: | http://dx.doi.org/10.1139/f99-136 http://www.nrcresearchpress.com/doi/pdf/10.1139/f99-136 |
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crcansciencepubl:10.1139/f99-136 2023-12-17T10:27:20+01:00 Food consumption and growth in maturing Atlantic salmon ( Salmo salar ) Stead, Selina M Houlihan, Dominic F McLay, H Anne Johnstone, Ray 1999 http://dx.doi.org/10.1139/f99-136 http://www.nrcresearchpress.com/doi/pdf/10.1139/f99-136 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 56, issue 11, page 2019-2028 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1999 crcansciencepubl https://doi.org/10.1139/f99-136 2023-11-19T13:39:24Z Circulating levels of the steroid hormones 11-ketotestosterone (11-KT) and 17β-estradiol (E2), voluntary food intake, and growth performance were measured in individual Atlantic salmon (Salmo salar) over the year preceding their maturation as grilse. 11-KT and E2 were measured by radioimmunoassay, and X-radiography was used to measure food consumption rates. Two phases of sexual maturation were identified: the early phase (October 1992 - April 1993) was characterized by slowly rising steroid hormone levels concomitant with relatively high rates of food consumption and growth, and in the late phase (May-October 1993), steroid hormone levels increased more rapidly and growth rates decreased in association with inappetence. Significant linear relationships were observed between food consumption and specific growth rates of fish throughout the study (ANCOVA, p < 0.05). Slopes and intercepts of regressions were similar for fish during early maturation, while a lower intercept and steeper slope (ANCOVA, p < 0.05) was observed during the later stages of maturation. In November, January, February, and April, fish in which steroid hormone levels were elevated were significantly heavier than those in which hormone levels were basal. There were no significant differences in specific growth rates (except in February), food consumption, or weight-specific food conversion ratio (except in August and October) associated with maturation status. Article in Journal/Newspaper Atlantic salmon Salmo salar Canadian Science Publishing (via Crossref) Canadian Journal of Fisheries and Aquatic Sciences 56 11 2019 2028 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Stead, Selina M Houlihan, Dominic F McLay, H Anne Johnstone, Ray Food consumption and growth in maturing Atlantic salmon ( Salmo salar ) |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Circulating levels of the steroid hormones 11-ketotestosterone (11-KT) and 17β-estradiol (E2), voluntary food intake, and growth performance were measured in individual Atlantic salmon (Salmo salar) over the year preceding their maturation as grilse. 11-KT and E2 were measured by radioimmunoassay, and X-radiography was used to measure food consumption rates. Two phases of sexual maturation were identified: the early phase (October 1992 - April 1993) was characterized by slowly rising steroid hormone levels concomitant with relatively high rates of food consumption and growth, and in the late phase (May-October 1993), steroid hormone levels increased more rapidly and growth rates decreased in association with inappetence. Significant linear relationships were observed between food consumption and specific growth rates of fish throughout the study (ANCOVA, p < 0.05). Slopes and intercepts of regressions were similar for fish during early maturation, while a lower intercept and steeper slope (ANCOVA, p < 0.05) was observed during the later stages of maturation. In November, January, February, and April, fish in which steroid hormone levels were elevated were significantly heavier than those in which hormone levels were basal. There were no significant differences in specific growth rates (except in February), food consumption, or weight-specific food conversion ratio (except in August and October) associated with maturation status. |
format |
Article in Journal/Newspaper |
author |
Stead, Selina M Houlihan, Dominic F McLay, H Anne Johnstone, Ray |
author_facet |
Stead, Selina M Houlihan, Dominic F McLay, H Anne Johnstone, Ray |
author_sort |
Stead, Selina M |
title |
Food consumption and growth in maturing Atlantic salmon ( Salmo salar ) |
title_short |
Food consumption and growth in maturing Atlantic salmon ( Salmo salar ) |
title_full |
Food consumption and growth in maturing Atlantic salmon ( Salmo salar ) |
title_fullStr |
Food consumption and growth in maturing Atlantic salmon ( Salmo salar ) |
title_full_unstemmed |
Food consumption and growth in maturing Atlantic salmon ( Salmo salar ) |
title_sort |
food consumption and growth in maturing atlantic salmon ( salmo salar ) |
publisher |
Canadian Science Publishing |
publishDate |
1999 |
url |
http://dx.doi.org/10.1139/f99-136 http://www.nrcresearchpress.com/doi/pdf/10.1139/f99-136 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 56, issue 11, page 2019-2028 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f99-136 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
56 |
container_issue |
11 |
container_start_page |
2019 |
op_container_end_page |
2028 |
_version_ |
1785579172948606976 |