Early Discrimination of Atlantic Salmon Smolt Age: Time Course of the Relative Effectiveness of Body Size and Shape
Abstract The goal of this study was to test the relative effectiveness of morphological measurements and body size in predicting the smolt age of Atlantic salmon Salmo salar and to determine the time course of body size and shape differences between smolt ages. Analyses were conducted on age‐0 to ag...
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crwiley:10.1577/t07-010.1 2024-04-07T07:51:06+00:00 Early Discrimination of Atlantic Salmon Smolt Age: Time Course of the Relative Effectiveness of Body Size and Shape Pearlstein, Jamie H. Letcher, Benjamin H. Obedzinski, Mariska 2007 http://dx.doi.org/10.1577/t07-010.1 https://afspubs.onlinelibrary.wiley.com/doi/pdf/10.1577/T07-010.1 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Transactions of the American Fisheries Society volume 136, issue 6, page 1622-1632 ISSN 0002-8487 1548-8659 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2007 crwiley https://doi.org/10.1577/t07-010.1 2024-03-08T03:54:26Z Abstract The goal of this study was to test the relative effectiveness of morphological measurements and body size in predicting the smolt age of Atlantic salmon Salmo salar and to determine the time course of body size and shape differences between smolt ages. Analyses were conducted on age‐0 to age‐2 fish that were stocked as fry in the West Brook, Massachusetts and on laboratory‐raised age‐0 to age‐1 fish. Using both body size and shape, we could partition the age‐0 fish collected during fall into future early or late smolts, although the predictive ability of body shape was somewhat weaker than that of body size, especially in the laboratory. Classification success averaged 81% (size) and 79% (shape) in the field and 85% (size) and 73% (shape) in the laboratory. Despite differences in smolt age between the field and the laboratory, the relative timing of growth rate differences between future early and late smolts was similar in the field and the laboratory and peaked at 50‐60% of development from fry to smolt. While body shape differed between early and late smolts well before smoltification, it did not improve classification based on size alone. Article in Journal/Newspaper Atlantic salmon Salmo salar Wiley Online Library West Brook ENVELOPE(-56.015,-56.015,49.667,49.667) Transactions of the American Fisheries Society 136 6 1622 1632 |
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Wiley Online Library |
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crwiley |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Pearlstein, Jamie H. Letcher, Benjamin H. Obedzinski, Mariska Early Discrimination of Atlantic Salmon Smolt Age: Time Course of the Relative Effectiveness of Body Size and Shape |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Abstract The goal of this study was to test the relative effectiveness of morphological measurements and body size in predicting the smolt age of Atlantic salmon Salmo salar and to determine the time course of body size and shape differences between smolt ages. Analyses were conducted on age‐0 to age‐2 fish that were stocked as fry in the West Brook, Massachusetts and on laboratory‐raised age‐0 to age‐1 fish. Using both body size and shape, we could partition the age‐0 fish collected during fall into future early or late smolts, although the predictive ability of body shape was somewhat weaker than that of body size, especially in the laboratory. Classification success averaged 81% (size) and 79% (shape) in the field and 85% (size) and 73% (shape) in the laboratory. Despite differences in smolt age between the field and the laboratory, the relative timing of growth rate differences between future early and late smolts was similar in the field and the laboratory and peaked at 50‐60% of development from fry to smolt. While body shape differed between early and late smolts well before smoltification, it did not improve classification based on size alone. |
format |
Article in Journal/Newspaper |
author |
Pearlstein, Jamie H. Letcher, Benjamin H. Obedzinski, Mariska |
author_facet |
Pearlstein, Jamie H. Letcher, Benjamin H. Obedzinski, Mariska |
author_sort |
Pearlstein, Jamie H. |
title |
Early Discrimination of Atlantic Salmon Smolt Age: Time Course of the Relative Effectiveness of Body Size and Shape |
title_short |
Early Discrimination of Atlantic Salmon Smolt Age: Time Course of the Relative Effectiveness of Body Size and Shape |
title_full |
Early Discrimination of Atlantic Salmon Smolt Age: Time Course of the Relative Effectiveness of Body Size and Shape |
title_fullStr |
Early Discrimination of Atlantic Salmon Smolt Age: Time Course of the Relative Effectiveness of Body Size and Shape |
title_full_unstemmed |
Early Discrimination of Atlantic Salmon Smolt Age: Time Course of the Relative Effectiveness of Body Size and Shape |
title_sort |
early discrimination of atlantic salmon smolt age: time course of the relative effectiveness of body size and shape |
publisher |
Wiley |
publishDate |
2007 |
url |
http://dx.doi.org/10.1577/t07-010.1 https://afspubs.onlinelibrary.wiley.com/doi/pdf/10.1577/T07-010.1 |
long_lat |
ENVELOPE(-56.015,-56.015,49.667,49.667) |
geographic |
West Brook |
geographic_facet |
West Brook |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Transactions of the American Fisheries Society volume 136, issue 6, page 1622-1632 ISSN 0002-8487 1548-8659 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1577/t07-010.1 |
container_title |
Transactions of the American Fisheries Society |
container_volume |
136 |
container_issue |
6 |
container_start_page |
1622 |
op_container_end_page |
1632 |
_version_ |
1795665946072842240 |