Seasonal and ontogenetic shifts in the diet of Arctic charr Salvelinus alpinus in a subarctic lake
Seasonal and ontogenetic shifts in the diet of Arctic charr Salvelinus alpinus were studied in a deep, ultra‐oligotrophic lake in subarctic Finland from both stomach contents and the stable carbon ( δ 13 C) and nitrogen ( δ 15 N) isotope compositions of muscle and liver tissues. Both diet and isotop...
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crwiley:10.1111/j.1095-8649.2010.02656.x 2024-09-15T17:52:23+00:00 Seasonal and ontogenetic shifts in the diet of Arctic charr Salvelinus alpinus in a subarctic lake Eloranta, A. P. Kahilainen, K. K. Jones, R. I. 2010 http://dx.doi.org/10.1111/j.1095-8649.2010.02656.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.2010.02656.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.2010.02656.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Fish Biology volume 77, issue 1, page 80-97 ISSN 0022-1112 1095-8649 journal-article 2010 crwiley https://doi.org/10.1111/j.1095-8649.2010.02656.x 2024-08-27T04:27:17Z Seasonal and ontogenetic shifts in the diet of Arctic charr Salvelinus alpinus were studied in a deep, ultra‐oligotrophic lake in subarctic Finland from both stomach contents and the stable carbon ( δ 13 C) and nitrogen ( δ 15 N) isotope compositions of muscle and liver tissues. Both diet and isotope results indicated that the S. alpinus population relied mainly on littoral benthic energy sources. The strong littoral reliance appeared largely independent of season or fish size, although the data lacked small (total length, L T , <130 mm) and young (<3 years) S. alpinus . Liver isotope values of intermediate‐sized S. alpinus (200–350 mm), however, suggested exploitation of the increase in the abundance of pelagic zooplankton in the late open‐water season. The results suggest that, in general, a strong littoral reliance of fishes can be a feature in subarctic lakes throughout the year. Due to its faster isotopic turnover rate and thus higher resolution for temporal diet changes, liver could be more commonly used in stable‐isotope studies of fish trophic niche shifts instead of using only the less responsive muscle tissue. Article in Journal/Newspaper Arctic charr Salvelinus alpinus Subarctic Zooplankton Wiley Online Library Journal of Fish Biology 77 1 80 97 |
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Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Seasonal and ontogenetic shifts in the diet of Arctic charr Salvelinus alpinus were studied in a deep, ultra‐oligotrophic lake in subarctic Finland from both stomach contents and the stable carbon ( δ 13 C) and nitrogen ( δ 15 N) isotope compositions of muscle and liver tissues. Both diet and isotope results indicated that the S. alpinus population relied mainly on littoral benthic energy sources. The strong littoral reliance appeared largely independent of season or fish size, although the data lacked small (total length, L T , <130 mm) and young (<3 years) S. alpinus . Liver isotope values of intermediate‐sized S. alpinus (200–350 mm), however, suggested exploitation of the increase in the abundance of pelagic zooplankton in the late open‐water season. The results suggest that, in general, a strong littoral reliance of fishes can be a feature in subarctic lakes throughout the year. Due to its faster isotopic turnover rate and thus higher resolution for temporal diet changes, liver could be more commonly used in stable‐isotope studies of fish trophic niche shifts instead of using only the less responsive muscle tissue. |
format |
Article in Journal/Newspaper |
author |
Eloranta, A. P. Kahilainen, K. K. Jones, R. I. |
spellingShingle |
Eloranta, A. P. Kahilainen, K. K. Jones, R. I. Seasonal and ontogenetic shifts in the diet of Arctic charr Salvelinus alpinus in a subarctic lake |
author_facet |
Eloranta, A. P. Kahilainen, K. K. Jones, R. I. |
author_sort |
Eloranta, A. P. |
title |
Seasonal and ontogenetic shifts in the diet of Arctic charr Salvelinus alpinus in a subarctic lake |
title_short |
Seasonal and ontogenetic shifts in the diet of Arctic charr Salvelinus alpinus in a subarctic lake |
title_full |
Seasonal and ontogenetic shifts in the diet of Arctic charr Salvelinus alpinus in a subarctic lake |
title_fullStr |
Seasonal and ontogenetic shifts in the diet of Arctic charr Salvelinus alpinus in a subarctic lake |
title_full_unstemmed |
Seasonal and ontogenetic shifts in the diet of Arctic charr Salvelinus alpinus in a subarctic lake |
title_sort |
seasonal and ontogenetic shifts in the diet of arctic charr salvelinus alpinus in a subarctic lake |
publisher |
Wiley |
publishDate |
2010 |
url |
http://dx.doi.org/10.1111/j.1095-8649.2010.02656.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.2010.02656.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.2010.02656.x |
genre |
Arctic charr Salvelinus alpinus Subarctic Zooplankton |
genre_facet |
Arctic charr Salvelinus alpinus Subarctic Zooplankton |
op_source |
Journal of Fish Biology volume 77, issue 1, page 80-97 ISSN 0022-1112 1095-8649 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1095-8649.2010.02656.x |
container_title |
Journal of Fish Biology |
container_volume |
77 |
container_issue |
1 |
container_start_page |
80 |
op_container_end_page |
97 |
_version_ |
1810294418342674432 |