Countergradient variation in behaviour, growth and lipid storage in Atlantic cod; environmental and genetic effects
We housed offspring from northern (70° N) and southern (60° N) coastal cod ( Gadus morhua ) together in a ‘common garden’ rearing experiment at a temperature and light regime representative of the southern population. Through a more active feeding behaviour and a higher success, the northern cod ach...
Published in: | Journal of Fish Biology |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2003
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1111/j.1095-8649.2003.216ah.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.2003.216ah.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.2003.216ah.x |
id |
crwiley:10.1111/j.1095-8649.2003.216ah.x |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1111/j.1095-8649.2003.216ah.x 2024-06-02T08:03:13+00:00 Countergradient variation in behaviour, growth and lipid storage in Atlantic cod; environmental and genetic effects Salvanes, A. G. V. Skjæraasen, J. E. Nilsen, T. 2003 http://dx.doi.org/10.1111/j.1095-8649.2003.216ah.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.2003.216ah.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.2003.216ah.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Fish Biology volume 63, issue s1, page 241-241 ISSN 0022-1112 1095-8649 journal-article 2003 crwiley https://doi.org/10.1111/j.1095-8649.2003.216ah.x 2024-05-03T11:48:53Z We housed offspring from northern (70° N) and southern (60° N) coastal cod ( Gadus morhua ) together in a ‘common garden’ rearing experiment at a temperature and light regime representative of the southern population. Through a more active feeding behaviour and a higher success, the northern cod achieved a larger food share and a higher growth rate and condition than their southern conspecifics. This is contrary to what was demonstrated by field data of fish from their natural habitats. The northern cod also allocated more energy to the liver throughout the experiment. Our results agree with the theory of countergradient variation, suggesting that genetic influences on growth and condition have been opposed by environmental constraints in their natural habitat. The observation that the offspring from these populations differ in behavior and growth when housed together support the idea that the growth response to selection would be through a behavioral response. The field data suggest that density‐dependent population process and high juvenile density relative to prey limit the growth and condition in the wild and not necessarily the length of the growth season per se as assumed in the literature. The topographic distance (over 2000 km) limit mixing of early life stages of cod from the northern and southern population, and the different environmental stimuli (seasonality, temperature, food‐web interactions and habitat heterogeneity) in north and south are likely to evolve genetic differences. Article in Journal/Newspaper atlantic cod Gadus morhua Wiley Online Library Journal of Fish Biology 63 241 241 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
We housed offspring from northern (70° N) and southern (60° N) coastal cod ( Gadus morhua ) together in a ‘common garden’ rearing experiment at a temperature and light regime representative of the southern population. Through a more active feeding behaviour and a higher success, the northern cod achieved a larger food share and a higher growth rate and condition than their southern conspecifics. This is contrary to what was demonstrated by field data of fish from their natural habitats. The northern cod also allocated more energy to the liver throughout the experiment. Our results agree with the theory of countergradient variation, suggesting that genetic influences on growth and condition have been opposed by environmental constraints in their natural habitat. The observation that the offspring from these populations differ in behavior and growth when housed together support the idea that the growth response to selection would be through a behavioral response. The field data suggest that density‐dependent population process and high juvenile density relative to prey limit the growth and condition in the wild and not necessarily the length of the growth season per se as assumed in the literature. The topographic distance (over 2000 km) limit mixing of early life stages of cod from the northern and southern population, and the different environmental stimuli (seasonality, temperature, food‐web interactions and habitat heterogeneity) in north and south are likely to evolve genetic differences. |
format |
Article in Journal/Newspaper |
author |
Salvanes, A. G. V. Skjæraasen, J. E. Nilsen, T. |
spellingShingle |
Salvanes, A. G. V. Skjæraasen, J. E. Nilsen, T. Countergradient variation in behaviour, growth and lipid storage in Atlantic cod; environmental and genetic effects |
author_facet |
Salvanes, A. G. V. Skjæraasen, J. E. Nilsen, T. |
author_sort |
Salvanes, A. G. V. |
title |
Countergradient variation in behaviour, growth and lipid storage in Atlantic cod; environmental and genetic effects |
title_short |
Countergradient variation in behaviour, growth and lipid storage in Atlantic cod; environmental and genetic effects |
title_full |
Countergradient variation in behaviour, growth and lipid storage in Atlantic cod; environmental and genetic effects |
title_fullStr |
Countergradient variation in behaviour, growth and lipid storage in Atlantic cod; environmental and genetic effects |
title_full_unstemmed |
Countergradient variation in behaviour, growth and lipid storage in Atlantic cod; environmental and genetic effects |
title_sort |
countergradient variation in behaviour, growth and lipid storage in atlantic cod; environmental and genetic effects |
publisher |
Wiley |
publishDate |
2003 |
url |
http://dx.doi.org/10.1111/j.1095-8649.2003.216ah.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.2003.216ah.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.2003.216ah.x |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_source |
Journal of Fish Biology volume 63, issue s1, page 241-241 ISSN 0022-1112 1095-8649 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1095-8649.2003.216ah.x |
container_title |
Journal of Fish Biology |
container_volume |
63 |
container_start_page |
241 |
op_container_end_page |
241 |
_version_ |
1800747684681744384 |