Functional models for growth and food consumption of Atlantic salmon parr, Salmo salar, from a Norwegian river

1. The chief objectives were to analyse and model experimental data for maximum growth and food consumption of Atlantic salmon parr (Salmo salar) collected from a cold glacier fed river in western Norway. The growth and feeding models were also applied to groups of Atlantic salmon growing and feedin...

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Published in:Freshwater Biology
Main Authors: Forseth, T., Hurley, Margaret Anne, Jensen, A. J., Elliott, J. M.
Format: Article in Journal/Newspaper
Language:unknown
Published: Wiley 2001
Subjects:
Online Access:http://clok.uclan.ac.uk/17429/
https://doi.org/10.1046/j.1365-2427.2001.00631.x
id ftunivclancas:oai:clok.uclan.ac.uk:17429
record_format openpolar
spelling ftunivclancas:oai:clok.uclan.ac.uk:17429 2023-05-15T15:30:01+02:00 Functional models for growth and food consumption of Atlantic salmon parr, Salmo salar, from a Norwegian river Forseth, T. Hurley, Margaret Anne Jensen, A. J. Elliott, J. M. 2001-02-01 http://clok.uclan.ac.uk/17429/ https://doi.org/10.1046/j.1365-2427.2001.00631.x unknown Wiley Forseth, T., Hurley, Margaret Anne orcid:0000-0002-2502-432X , Jensen, A. J. and Elliott, J. M. (2001) Functional models for growth and food consumption of Atlantic salmon parr, Salmo salar, from a Norwegian river. Freshwater Biology, 46 (2). pp. 173-186. ISSN 0046-5070 doi:10.1046/j.1365-2427.2001.00631.x C160 - Marine/Freshwater biology Article PeerReviewed 2001 ftunivclancas https://doi.org/10.1046/j.1365-2427.2001.00631.x 2021-09-09T22:28:31Z 1. The chief objectives were to analyse and model experimental data for maximum growth and food consumption of Atlantic salmon parr (Salmo salar) collected from a cold glacier fed river in western Norway. The growth and feeding models were also applied to groups of Atlantic salmon growing and feeding at rates below the maximum. The growth models were validated by comparing their predictions with observed growth in the river supplying the experimental fish. 2. Two different models were fitted, one originally developed for British salmon and the other based on a model for bacterial growth. Both gave estimates for optimum temperature for growth at 18–19 °C, somewhat higher than for Atlantic salmon from Britain. Higher optimal temperature for growth in salmon from a cold Norwegian river than from British rivers does not concur with predictions from the thermal adaptation hypothesis. 3. Model parameter estimates differed among growth groups in that the lower critical temperature for growth increased from fast to slow growing individuals. In contrast to findings for brown trout (Salmo trutta), the optimum temperature for growth did not decrease with decreasing levels of food consumption. 4. A new and simple model showed that food consumption (expressed in energy terms) peaked at 19.5–19.8 °C, which is similar to the optimal temperature for growth. Feeding began at a temperature 1.5 °C below the lower temperature for growth and ended about 1 °C above the maximum temperature for growth. Model parameter estimates for consumption differed among growth groups in a manner similar to the growth models. Maximum consumption was lower for Atlantic salmon than for brown trout, except at temperatures above 18 °C. 5. By combining the growth and food consumption models, growth efficiency was estimated and reached a maximum at about 14 °C for fast growing individuals, increasing to nearly 17 °C for slow growing ones, although it was lower overall for the latter group. Efficiency also declined with increasing fish size. Growth efficiency was generally higher for Atlantic salmon than for brown trout, particularly at high temperature. Article in Journal/Newspaper Atlantic salmon glacier Salmo salar University of Central Lancashire: CLOK - Central Lancashire Online Knowledge Norway Freshwater Biology 46 2 173 186
institution Open Polar
collection University of Central Lancashire: CLOK - Central Lancashire Online Knowledge
op_collection_id ftunivclancas
language unknown
topic C160 - Marine/Freshwater biology
spellingShingle C160 - Marine/Freshwater biology
Forseth, T.
Hurley, Margaret Anne
Jensen, A. J.
Elliott, J. M.
Functional models for growth and food consumption of Atlantic salmon parr, Salmo salar, from a Norwegian river
topic_facet C160 - Marine/Freshwater biology
description 1. The chief objectives were to analyse and model experimental data for maximum growth and food consumption of Atlantic salmon parr (Salmo salar) collected from a cold glacier fed river in western Norway. The growth and feeding models were also applied to groups of Atlantic salmon growing and feeding at rates below the maximum. The growth models were validated by comparing their predictions with observed growth in the river supplying the experimental fish. 2. Two different models were fitted, one originally developed for British salmon and the other based on a model for bacterial growth. Both gave estimates for optimum temperature for growth at 18–19 °C, somewhat higher than for Atlantic salmon from Britain. Higher optimal temperature for growth in salmon from a cold Norwegian river than from British rivers does not concur with predictions from the thermal adaptation hypothesis. 3. Model parameter estimates differed among growth groups in that the lower critical temperature for growth increased from fast to slow growing individuals. In contrast to findings for brown trout (Salmo trutta), the optimum temperature for growth did not decrease with decreasing levels of food consumption. 4. A new and simple model showed that food consumption (expressed in energy terms) peaked at 19.5–19.8 °C, which is similar to the optimal temperature for growth. Feeding began at a temperature 1.5 °C below the lower temperature for growth and ended about 1 °C above the maximum temperature for growth. Model parameter estimates for consumption differed among growth groups in a manner similar to the growth models. Maximum consumption was lower for Atlantic salmon than for brown trout, except at temperatures above 18 °C. 5. By combining the growth and food consumption models, growth efficiency was estimated and reached a maximum at about 14 °C for fast growing individuals, increasing to nearly 17 °C for slow growing ones, although it was lower overall for the latter group. Efficiency also declined with increasing fish size. Growth efficiency was generally higher for Atlantic salmon than for brown trout, particularly at high temperature.
format Article in Journal/Newspaper
author Forseth, T.
Hurley, Margaret Anne
Jensen, A. J.
Elliott, J. M.
author_facet Forseth, T.
Hurley, Margaret Anne
Jensen, A. J.
Elliott, J. M.
author_sort Forseth, T.
title Functional models for growth and food consumption of Atlantic salmon parr, Salmo salar, from a Norwegian river
title_short Functional models for growth and food consumption of Atlantic salmon parr, Salmo salar, from a Norwegian river
title_full Functional models for growth and food consumption of Atlantic salmon parr, Salmo salar, from a Norwegian river
title_fullStr Functional models for growth and food consumption of Atlantic salmon parr, Salmo salar, from a Norwegian river
title_full_unstemmed Functional models for growth and food consumption of Atlantic salmon parr, Salmo salar, from a Norwegian river
title_sort functional models for growth and food consumption of atlantic salmon parr, salmo salar, from a norwegian river
publisher Wiley
publishDate 2001
url http://clok.uclan.ac.uk/17429/
https://doi.org/10.1046/j.1365-2427.2001.00631.x
geographic Norway
geographic_facet Norway
genre Atlantic salmon
glacier
Salmo salar
genre_facet Atlantic salmon
glacier
Salmo salar
op_relation Forseth, T., Hurley, Margaret Anne orcid:0000-0002-2502-432X , Jensen, A. J. and Elliott, J. M. (2001) Functional models for growth and food consumption of Atlantic salmon parr, Salmo salar, from a Norwegian river. Freshwater Biology, 46 (2). pp. 173-186. ISSN 0046-5070
doi:10.1046/j.1365-2427.2001.00631.x
op_doi https://doi.org/10.1046/j.1365-2427.2001.00631.x
container_title Freshwater Biology
container_volume 46
container_issue 2
container_start_page 173
op_container_end_page 186
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