Morphological, ecological and behavioural differentiation of sympatric profundal and pelagic Arctic charr (Salvelinus alpinus) in Loch Dughaill Scotland
Phenotypic variation in populations of fishes that inhabit postglacial lakes is often associated with trophic specialisations. A common sympatric foraging divergence seen in Arctic charr is into either plankton or littoral-zoobenthos feeding specialisms. In this study, we report a sympatric polymorp...
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Online Access: | https://eprints.gla.ac.uk/117387/ https://eprints.gla.ac.uk/117387/7/117387.pdf |
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ftuglasgow:oai:eprints.gla.ac.uk:117387 2023-05-15T14:27:47+02:00 Morphological, ecological and behavioural differentiation of sympatric profundal and pelagic Arctic charr (Salvelinus alpinus) in Loch Dughaill Scotland Hooker, O.E. Barry, J. Van Leeuwen, T.E. Lyle, A. Newton, J. Cunningham, P. Adams, C.E. 2016-12 text https://eprints.gla.ac.uk/117387/ https://eprints.gla.ac.uk/117387/7/117387.pdf en eng Springer International Publishing https://eprints.gla.ac.uk/117387/7/117387.pdf Hooker, O.E., Barry, J. <http://eprints.gla.ac.uk/view/author/6797.html>, Van Leeuwen, T.E. <http://eprints.gla.ac.uk/view/author/34626.html>, Lyle, A. <http://eprints.gla.ac.uk/view/author/32924.html>, Newton, J. <http://eprints.gla.ac.uk/view/author/7085.html> , Cunningham, P. and Adams, C.E. <http://eprints.gla.ac.uk/view/author/2983.html> (2016) Morphological, ecological and behavioural differentiation of sympatric profundal and pelagic Arctic charr (Salvelinus alpinus) in Loch Dughaill Scotland. Hydrobiologia <https://eprints.gla.ac.uk/view/journal_volume/Hydrobiologia.html>, 783(1), pp. 209-221. (doi:10.1007/s10750-015-2599-0 <https://doi.org/10.1007/s10750-015-2599-0>) cc_by_4 CC-BY Articles PeerReviewed 2016 ftuglasgow https://doi.org/10.1007/s10750-015-2599-0 2022-09-22T22:12:50Z Phenotypic variation in populations of fishes that inhabit postglacial lakes is often associated with trophic specialisations. A common sympatric foraging divergence seen in Arctic charr is into either plankton or littoral-zoobenthos feeding specialisms. In this study, we report a sympatric polymorphic Arctic charr population which is not centred on this divergence but instead manifests as a plankton (pelagic)—profundal zoobenthos foraging specialisms. The head shape of profundal fish was round and robust, the body thick set and pectoral fins long and wide. In contrast, the head of pelagic fish was pointed and slender, the body fusiform in shape and with short, narrow pectoral fins. There was no difference between profundal and pelagic fish in gill raker number. Body lipid content was significantly higher in pelagic fish as were the number or Diphyllobothrium cysts. The carbon isotope ratio was more heavily depleted in profundal fish. There was no dietary overlap in the prey items recovered from stomach contents of profundal and pelagic fish. We suggest the proximate driver behind the sympatric divergence was the successful exploitation of the profundal zone. The consequences of this have led to the development of adaptations in morphology and behaviour to support and maintain this divergence. Article in Journal/Newspaper Arctic Arctic charr Arctic Salvelinus alpinus University of Glasgow: Enlighten - Publications Arctic Hydrobiologia 783 1 209 221 |
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Open Polar |
collection |
University of Glasgow: Enlighten - Publications |
op_collection_id |
ftuglasgow |
language |
English |
description |
Phenotypic variation in populations of fishes that inhabit postglacial lakes is often associated with trophic specialisations. A common sympatric foraging divergence seen in Arctic charr is into either plankton or littoral-zoobenthos feeding specialisms. In this study, we report a sympatric polymorphic Arctic charr population which is not centred on this divergence but instead manifests as a plankton (pelagic)—profundal zoobenthos foraging specialisms. The head shape of profundal fish was round and robust, the body thick set and pectoral fins long and wide. In contrast, the head of pelagic fish was pointed and slender, the body fusiform in shape and with short, narrow pectoral fins. There was no difference between profundal and pelagic fish in gill raker number. Body lipid content was significantly higher in pelagic fish as were the number or Diphyllobothrium cysts. The carbon isotope ratio was more heavily depleted in profundal fish. There was no dietary overlap in the prey items recovered from stomach contents of profundal and pelagic fish. We suggest the proximate driver behind the sympatric divergence was the successful exploitation of the profundal zone. The consequences of this have led to the development of adaptations in morphology and behaviour to support and maintain this divergence. |
format |
Article in Journal/Newspaper |
author |
Hooker, O.E. Barry, J. Van Leeuwen, T.E. Lyle, A. Newton, J. Cunningham, P. Adams, C.E. |
spellingShingle |
Hooker, O.E. Barry, J. Van Leeuwen, T.E. Lyle, A. Newton, J. Cunningham, P. Adams, C.E. Morphological, ecological and behavioural differentiation of sympatric profundal and pelagic Arctic charr (Salvelinus alpinus) in Loch Dughaill Scotland |
author_facet |
Hooker, O.E. Barry, J. Van Leeuwen, T.E. Lyle, A. Newton, J. Cunningham, P. Adams, C.E. |
author_sort |
Hooker, O.E. |
title |
Morphological, ecological and behavioural differentiation of sympatric profundal and pelagic Arctic charr (Salvelinus alpinus) in Loch Dughaill Scotland |
title_short |
Morphological, ecological and behavioural differentiation of sympatric profundal and pelagic Arctic charr (Salvelinus alpinus) in Loch Dughaill Scotland |
title_full |
Morphological, ecological and behavioural differentiation of sympatric profundal and pelagic Arctic charr (Salvelinus alpinus) in Loch Dughaill Scotland |
title_fullStr |
Morphological, ecological and behavioural differentiation of sympatric profundal and pelagic Arctic charr (Salvelinus alpinus) in Loch Dughaill Scotland |
title_full_unstemmed |
Morphological, ecological and behavioural differentiation of sympatric profundal and pelagic Arctic charr (Salvelinus alpinus) in Loch Dughaill Scotland |
title_sort |
morphological, ecological and behavioural differentiation of sympatric profundal and pelagic arctic charr (salvelinus alpinus) in loch dughaill scotland |
publisher |
Springer International Publishing |
publishDate |
2016 |
url |
https://eprints.gla.ac.uk/117387/ https://eprints.gla.ac.uk/117387/7/117387.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic charr Arctic Salvelinus alpinus |
genre_facet |
Arctic Arctic charr Arctic Salvelinus alpinus |
op_relation |
https://eprints.gla.ac.uk/117387/7/117387.pdf Hooker, O.E., Barry, J. <http://eprints.gla.ac.uk/view/author/6797.html>, Van Leeuwen, T.E. <http://eprints.gla.ac.uk/view/author/34626.html>, Lyle, A. <http://eprints.gla.ac.uk/view/author/32924.html>, Newton, J. <http://eprints.gla.ac.uk/view/author/7085.html> , Cunningham, P. and Adams, C.E. <http://eprints.gla.ac.uk/view/author/2983.html> (2016) Morphological, ecological and behavioural differentiation of sympatric profundal and pelagic Arctic charr (Salvelinus alpinus) in Loch Dughaill Scotland. Hydrobiologia <https://eprints.gla.ac.uk/view/journal_volume/Hydrobiologia.html>, 783(1), pp. 209-221. (doi:10.1007/s10750-015-2599-0 <https://doi.org/10.1007/s10750-015-2599-0>) |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1007/s10750-015-2599-0 |
container_title |
Hydrobiologia |
container_volume |
783 |
container_issue |
1 |
container_start_page |
209 |
op_container_end_page |
221 |
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1766301687131144192 |