A stable isotope analysis of trophic polymorphism among Arctic charr from Loch Ericht, Scotland

Analysis of nitrogen stable isotope ratios (delta(15)N) in white muscle and liver shows temporal stability in the trophic levels at which the two sympatric morphs of Arctic charr Salvelinus alpinus from Loch Ericht feed. The results confirm an ontogenetic dietary switch to a more piscivorous diet, o...

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Bibliographic Details
Main Authors: McCarthy, I.D., Fraser, D., Waldron, S., Adams, C.E.
Format: Article in Journal/Newspaper
Language:unknown
Published: 2004
Subjects:
QH301 Biology
QL Zoology
Arctic
Arctic charr
Salvelinus alpinus
Online Access:https://eprints.gla.ac.uk/2022/
id ftuglasgow:oai:eprints.gla.ac.uk:2022
record_format openpolar
spelling ftuglasgow:oai:eprints.gla.ac.uk:2022 2024-06-02T07:59:43+00:00 A stable isotope analysis of trophic polymorphism among Arctic charr from Loch Ericht, Scotland McCarthy, I.D. Fraser, D. Waldron, S. Adams, C.E. 2004 https://eprints.gla.ac.uk/2022/ unknown McCarthy, I.D., Fraser, D., Waldron, S. <http://eprints.gla.ac.uk/view/author/12588.html> and Adams, C.E. (2004) A stable isotope analysis of trophic polymorphism among Arctic charr from Loch Ericht, Scotland. Journal of Fish Biology <https://eprints.gla.ac.uk/view/journal_volume/Journal_of_Fish_Biology.html>, 65(5), pp. 1435-1440. QH301 Biology QL Zoology Articles PeerReviewed 2004 ftuglasgow 2024-05-06T14:57:02Z Analysis of nitrogen stable isotope ratios (delta(15)N) in white muscle and liver shows temporal stability in the trophic levels at which the two sympatric morphs of Arctic charr Salvelinus alpinus from Loch Ericht feed. The results confirm an ontogenetic dietary switch to a more piscivorous diet, occurred in all individuals of one of the morphs, above a size threshold of 16.5 cm fork length, indicating that this Occurs at a high frequency in this population and that once made, the return to feeding to a lower trophic level is infrequent. Article in Journal/Newspaper Arctic Arctic charr Arctic Salvelinus alpinus University of Glasgow: Enlighten - Publications Arctic
institution Open Polar
collection University of Glasgow: Enlighten - Publications
op_collection_id ftuglasgow
language unknown
topic QH301 Biology
QL Zoology
spellingShingle QH301 Biology
QL Zoology
McCarthy, I.D.
Fraser, D.
Waldron, S.
Adams, C.E.
A stable isotope analysis of trophic polymorphism among Arctic charr from Loch Ericht, Scotland
topic_facet QH301 Biology
QL Zoology
description Analysis of nitrogen stable isotope ratios (delta(15)N) in white muscle and liver shows temporal stability in the trophic levels at which the two sympatric morphs of Arctic charr Salvelinus alpinus from Loch Ericht feed. The results confirm an ontogenetic dietary switch to a more piscivorous diet, occurred in all individuals of one of the morphs, above a size threshold of 16.5 cm fork length, indicating that this Occurs at a high frequency in this population and that once made, the return to feeding to a lower trophic level is infrequent.
format Article in Journal/Newspaper
author McCarthy, I.D.
Fraser, D.
Waldron, S.
Adams, C.E.
author_facet McCarthy, I.D.
Fraser, D.
Waldron, S.
Adams, C.E.
author_sort McCarthy, I.D.
title A stable isotope analysis of trophic polymorphism among Arctic charr from Loch Ericht, Scotland
title_short A stable isotope analysis of trophic polymorphism among Arctic charr from Loch Ericht, Scotland
title_full A stable isotope analysis of trophic polymorphism among Arctic charr from Loch Ericht, Scotland
title_fullStr A stable isotope analysis of trophic polymorphism among Arctic charr from Loch Ericht, Scotland
title_full_unstemmed A stable isotope analysis of trophic polymorphism among Arctic charr from Loch Ericht, Scotland
title_sort stable isotope analysis of trophic polymorphism among arctic charr from loch ericht, scotland
publishDate 2004
url https://eprints.gla.ac.uk/2022/
geographic Arctic
geographic_facet Arctic
genre Arctic
Arctic charr
Arctic
Salvelinus alpinus
genre_facet Arctic
Arctic charr
Arctic
Salvelinus alpinus
op_relation McCarthy, I.D., Fraser, D., Waldron, S. <http://eprints.gla.ac.uk/view/author/12588.html> and Adams, C.E. (2004) A stable isotope analysis of trophic polymorphism among Arctic charr from Loch Ericht, Scotland. Journal of Fish Biology <https://eprints.gla.ac.uk/view/journal_volume/Journal_of_Fish_Biology.html>, 65(5), pp. 1435-1440.
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