Variation in freshwater growth and development among five New England Atlantic salmon ( Salmo salar ) populations reared in a common environment
We examined phenotypic variation in growth and development from the eyed-egg stage to the age-1+ smolt stage among five New England populations of Atlantic salmon (Salmo salar: East Machias, Narraguagus, Sheepscot, Penobscot, Connecticut) reared in a common laboratory environment. Study populations...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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crcansciencepubl:10.1139/f05-005 2023-12-17T10:27:21+01:00 Variation in freshwater growth and development among five New England Atlantic salmon ( Salmo salar ) populations reared in a common environment Obedzinski, Mariska Letcher, Benjamin H 2004 http://dx.doi.org/10.1139/f05-005 http://www.nrcresearchpress.com/doi/pdf/10.1139/f05-005 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 61, issue 12, page 2314-2328 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2004 crcansciencepubl https://doi.org/10.1139/f05-005 2023-11-19T13:38:37Z We examined phenotypic variation in growth and development from the eyed-egg stage to the age-1+ smolt stage among five New England populations of Atlantic salmon (Salmo salar: East Machias, Narraguagus, Sheepscot, Penobscot, Connecticut) reared in a common laboratory environment. Study populations originated from rivers varying in size, latitude, and level of hatchery supplementation and included one reintroduced population (Connecticut was a recipient of Penobscot origin stock). Phenotypic trait differences were found among populations, and the degree of stock variation depended on ontogeny. Eggs were smaller and hatched sooner in the Penobscot (a northern, intensively managed population), but no stock differences were detected in size or growth efficiency from the onset of exogenous feeding to age 0+ summer. Differences again emerged in age 0+ autumn, with the degree of bimodality in length frequency distributions differing among stocks; the Connecticut had the highest proportion of upper-mode fish and, ultimately, age-1+ smolts. Although genetic effects could not be entirely separated from maternal effects for egg size variation, it is likely that differences in hatch timing and smolt age had a genetic basis. Early emphasis on age-1+ hatchery-reared smolts in the Connecticut may have led to divergence in smolt age between the Penobscot and Connecticut populations in less than eight generations. Article in Journal/Newspaper Atlantic salmon Salmo salar Canadian Science Publishing (via Crossref) Canadian Journal of Fisheries and Aquatic Sciences 61 12 2314 2328 |
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Open Polar |
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Canadian Science Publishing (via Crossref) |
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language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
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Aquatic Science Ecology, Evolution, Behavior and Systematics Obedzinski, Mariska Letcher, Benjamin H Variation in freshwater growth and development among five New England Atlantic salmon ( Salmo salar ) populations reared in a common environment |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
We examined phenotypic variation in growth and development from the eyed-egg stage to the age-1+ smolt stage among five New England populations of Atlantic salmon (Salmo salar: East Machias, Narraguagus, Sheepscot, Penobscot, Connecticut) reared in a common laboratory environment. Study populations originated from rivers varying in size, latitude, and level of hatchery supplementation and included one reintroduced population (Connecticut was a recipient of Penobscot origin stock). Phenotypic trait differences were found among populations, and the degree of stock variation depended on ontogeny. Eggs were smaller and hatched sooner in the Penobscot (a northern, intensively managed population), but no stock differences were detected in size or growth efficiency from the onset of exogenous feeding to age 0+ summer. Differences again emerged in age 0+ autumn, with the degree of bimodality in length frequency distributions differing among stocks; the Connecticut had the highest proportion of upper-mode fish and, ultimately, age-1+ smolts. Although genetic effects could not be entirely separated from maternal effects for egg size variation, it is likely that differences in hatch timing and smolt age had a genetic basis. Early emphasis on age-1+ hatchery-reared smolts in the Connecticut may have led to divergence in smolt age between the Penobscot and Connecticut populations in less than eight generations. |
format |
Article in Journal/Newspaper |
author |
Obedzinski, Mariska Letcher, Benjamin H |
author_facet |
Obedzinski, Mariska Letcher, Benjamin H |
author_sort |
Obedzinski, Mariska |
title |
Variation in freshwater growth and development among five New England Atlantic salmon ( Salmo salar ) populations reared in a common environment |
title_short |
Variation in freshwater growth and development among five New England Atlantic salmon ( Salmo salar ) populations reared in a common environment |
title_full |
Variation in freshwater growth and development among five New England Atlantic salmon ( Salmo salar ) populations reared in a common environment |
title_fullStr |
Variation in freshwater growth and development among five New England Atlantic salmon ( Salmo salar ) populations reared in a common environment |
title_full_unstemmed |
Variation in freshwater growth and development among five New England Atlantic salmon ( Salmo salar ) populations reared in a common environment |
title_sort |
variation in freshwater growth and development among five new england atlantic salmon ( salmo salar ) populations reared in a common environment |
publisher |
Canadian Science Publishing |
publishDate |
2004 |
url |
http://dx.doi.org/10.1139/f05-005 http://www.nrcresearchpress.com/doi/pdf/10.1139/f05-005 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 61, issue 12, page 2314-2328 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f05-005 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
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61 |
container_issue |
12 |
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2314 |
op_container_end_page |
2328 |
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1785579203009183744 |