Energy allocation among developmental stages, age groups, and types of Atlantic salmon ( Salmo salar) spawners
Relationships between energy density (kJ·100 g 1 ) and body length (mm), which varied between life-history stages of Atlantic salmon (Salmo salar), were described by power functions. The variation was chiefly caused by differences in lipid concentrations. Energy densities of maturing and rematuring...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Canadian Science Publishing
2003
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Online Access: | http://dx.doi.org/10.1139/f03-042 http://www.nrcresearchpress.com/doi/pdf/10.1139/f03-042 |
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crcansciencepubl:10.1139/f03-042 2024-09-15T17:56:07+00:00 Energy allocation among developmental stages, age groups, and types of Atlantic salmon ( Salmo salar) spawners Jonsson, Nina Jonsson, Bror 2003 http://dx.doi.org/10.1139/f03-042 http://www.nrcresearchpress.com/doi/pdf/10.1139/f03-042 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 60, issue 5, page 506-516 ISSN 0706-652X 1205-7533 journal-article 2003 crcansciencepubl https://doi.org/10.1139/f03-042 2024-07-18T04:13:30Z Relationships between energy density (kJ·100 g 1 ) and body length (mm), which varied between life-history stages of Atlantic salmon (Salmo salar), were described by power functions. The variation was chiefly caused by differences in lipid concentrations. Energy densities of maturing and rematuring parr were higher than those of similarly aged smolts. Monthly specific growth rate was higher in maturing parr than in salmon at sea. Mature parr males allocated relatively more energy to gonadal development and less to soma development than anadromous males. Spawning expenditure increased from 34 to 53% for 55- to 72-cm-long females. In males, similar losses were from 47 to 49% of their total energy content at river entry. More energy was used in reproduction in a long river than in a short one. Male allocation to gonads relative to soma was highest in the shorter river. Energy allocation pattern varied among developmental stages. Very energy-rich male parr rematured in subsequent years without going to sea; less energy-rich ones smolted and migrated to sea. Article in Journal/Newspaper Atlantic salmon Salmo salar Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 60 5 506 516 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
Relationships between energy density (kJ·100 g 1 ) and body length (mm), which varied between life-history stages of Atlantic salmon (Salmo salar), were described by power functions. The variation was chiefly caused by differences in lipid concentrations. Energy densities of maturing and rematuring parr were higher than those of similarly aged smolts. Monthly specific growth rate was higher in maturing parr than in salmon at sea. Mature parr males allocated relatively more energy to gonadal development and less to soma development than anadromous males. Spawning expenditure increased from 34 to 53% for 55- to 72-cm-long females. In males, similar losses were from 47 to 49% of their total energy content at river entry. More energy was used in reproduction in a long river than in a short one. Male allocation to gonads relative to soma was highest in the shorter river. Energy allocation pattern varied among developmental stages. Very energy-rich male parr rematured in subsequent years without going to sea; less energy-rich ones smolted and migrated to sea. |
format |
Article in Journal/Newspaper |
author |
Jonsson, Nina Jonsson, Bror |
spellingShingle |
Jonsson, Nina Jonsson, Bror Energy allocation among developmental stages, age groups, and types of Atlantic salmon ( Salmo salar) spawners |
author_facet |
Jonsson, Nina Jonsson, Bror |
author_sort |
Jonsson, Nina |
title |
Energy allocation among developmental stages, age groups, and types of Atlantic salmon ( Salmo salar) spawners |
title_short |
Energy allocation among developmental stages, age groups, and types of Atlantic salmon ( Salmo salar) spawners |
title_full |
Energy allocation among developmental stages, age groups, and types of Atlantic salmon ( Salmo salar) spawners |
title_fullStr |
Energy allocation among developmental stages, age groups, and types of Atlantic salmon ( Salmo salar) spawners |
title_full_unstemmed |
Energy allocation among developmental stages, age groups, and types of Atlantic salmon ( Salmo salar) spawners |
title_sort |
energy allocation among developmental stages, age groups, and types of atlantic salmon ( salmo salar) spawners |
publisher |
Canadian Science Publishing |
publishDate |
2003 |
url |
http://dx.doi.org/10.1139/f03-042 http://www.nrcresearchpress.com/doi/pdf/10.1139/f03-042 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 60, issue 5, page 506-516 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f03-042 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
60 |
container_issue |
5 |
container_start_page |
506 |
op_container_end_page |
516 |
_version_ |
1810432337830215680 |