The effects of winter ice cover on the trophic ecology of whitefish ( Coregonus lavaretus L.) in subarctic lakes
Abstract Lakes in Arctic and subarctic regions display extreme levels of seasonal variation in light, temperature and ice cover. Comparatively little is known regarding the effects of such seasonal variation on the diet and resource use of fish species inhabiting these systems. Variation in the diet...
Published in: | Ecology of Freshwater Fish |
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crwiley:10.1111/eff.12014 2024-06-23T07:50:37+00:00 The effects of winter ice cover on the trophic ecology of whitefish ( Coregonus lavaretus L.) in subarctic lakes Hayden, Brian Harrod, Chris Kahilainen, Kimmo K. 2012 http://dx.doi.org/10.1111/eff.12014 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Feff.12014 https://onlinelibrary.wiley.com/doi/pdf/10.1111/eff.12014 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Ecology of Freshwater Fish volume 22, issue 2, page 192-201 ISSN 0906-6691 1600-0633 journal-article 2012 crwiley https://doi.org/10.1111/eff.12014 2024-06-13T04:22:32Z Abstract Lakes in Arctic and subarctic regions display extreme levels of seasonal variation in light, temperature and ice cover. Comparatively little is known regarding the effects of such seasonal variation on the diet and resource use of fish species inhabiting these systems. Variation in the diet of European whitefish C oregonus lavaretus ( L. ) during periods of ice cover in this region is often regarded as ‘common knowledge’; however, this aspect of the species' ecology has not been examined empirically. Here, we outline the differences in invertebrate community structure, fish activity, and resource use of monomorphic whitefish populations between summer ( A ugust– S eptember) and winter ( F ebruary– M arch) in three subarctic lakes in F innish L apland. Benthic macroinvertebrate densities did not exhibit measurable differences between summer and winter. Zooplankton diversity and abundance, and activity levels of all fish species (measured as catch per unit effort) were lower in winter. The summer diet of C. lavaretus was typical of a generalist utilising a variety of prey sources. In winter, its dietary niche was significantly reduced, and the diet was dominated by chironomid larvae in all study sites. Pelagic productivity decreases during winter, and fish species inhabiting these systems are therefore restricted to feeding on benthic prey. Sampling time has strong effect on our understanding of resource utilisation by whitefish in subarctic lakes and should be taken into account in future studies of these systems. Article in Journal/Newspaper Arctic Subarctic Zooplankton Wiley Online Library Arctic Ecology of Freshwater Fish 22 2 192 201 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Lakes in Arctic and subarctic regions display extreme levels of seasonal variation in light, temperature and ice cover. Comparatively little is known regarding the effects of such seasonal variation on the diet and resource use of fish species inhabiting these systems. Variation in the diet of European whitefish C oregonus lavaretus ( L. ) during periods of ice cover in this region is often regarded as ‘common knowledge’; however, this aspect of the species' ecology has not been examined empirically. Here, we outline the differences in invertebrate community structure, fish activity, and resource use of monomorphic whitefish populations between summer ( A ugust– S eptember) and winter ( F ebruary– M arch) in three subarctic lakes in F innish L apland. Benthic macroinvertebrate densities did not exhibit measurable differences between summer and winter. Zooplankton diversity and abundance, and activity levels of all fish species (measured as catch per unit effort) were lower in winter. The summer diet of C. lavaretus was typical of a generalist utilising a variety of prey sources. In winter, its dietary niche was significantly reduced, and the diet was dominated by chironomid larvae in all study sites. Pelagic productivity decreases during winter, and fish species inhabiting these systems are therefore restricted to feeding on benthic prey. Sampling time has strong effect on our understanding of resource utilisation by whitefish in subarctic lakes and should be taken into account in future studies of these systems. |
format |
Article in Journal/Newspaper |
author |
Hayden, Brian Harrod, Chris Kahilainen, Kimmo K. |
spellingShingle |
Hayden, Brian Harrod, Chris Kahilainen, Kimmo K. The effects of winter ice cover on the trophic ecology of whitefish ( Coregonus lavaretus L.) in subarctic lakes |
author_facet |
Hayden, Brian Harrod, Chris Kahilainen, Kimmo K. |
author_sort |
Hayden, Brian |
title |
The effects of winter ice cover on the trophic ecology of whitefish ( Coregonus lavaretus L.) in subarctic lakes |
title_short |
The effects of winter ice cover on the trophic ecology of whitefish ( Coregonus lavaretus L.) in subarctic lakes |
title_full |
The effects of winter ice cover on the trophic ecology of whitefish ( Coregonus lavaretus L.) in subarctic lakes |
title_fullStr |
The effects of winter ice cover on the trophic ecology of whitefish ( Coregonus lavaretus L.) in subarctic lakes |
title_full_unstemmed |
The effects of winter ice cover on the trophic ecology of whitefish ( Coregonus lavaretus L.) in subarctic lakes |
title_sort |
effects of winter ice cover on the trophic ecology of whitefish ( coregonus lavaretus l.) in subarctic lakes |
publisher |
Wiley |
publishDate |
2012 |
url |
http://dx.doi.org/10.1111/eff.12014 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Feff.12014 https://onlinelibrary.wiley.com/doi/pdf/10.1111/eff.12014 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Subarctic Zooplankton |
genre_facet |
Arctic Subarctic Zooplankton |
op_source |
Ecology of Freshwater Fish volume 22, issue 2, page 192-201 ISSN 0906-6691 1600-0633 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/eff.12014 |
container_title |
Ecology of Freshwater Fish |
container_volume |
22 |
container_issue |
2 |
container_start_page |
192 |
op_container_end_page |
201 |
_version_ |
1802641523881279488 |