Morphometric analysis of two ecologically distinct forms of Arctic charr, Salvelinus alpinus (L.), in Loch Rannoch, Scotland

Gill–netted samples of Arctic charr from Loch Rannoch, Scotland were bimodal when tested by univariate and multivariate morphometric analyses. The separation into two morphs corresponded very closely (95–98%) with fish classified subjectively in the field as benthic or pelagic, based largely on colo...

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Bibliographic Details
Published in:Journal of Fish Biology
Main Authors: Gardner, A. S., Walker, A. F., Greer, R. B.
Format: Article in Journal/Newspaper
Language:English
Published: Wiley 1988
Subjects:
Aquatic Science
Ecology, Evolution, Behavior and Systematics
Arctic
Greenland
Arctic charr
Salvelinus alpinus
Online Access:http://dx.doi.org/10.1111/j.1095-8649.1988.tb05433.x
https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1095-8649.1988.tb05433.x
https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1095-8649.1988.tb05433.x
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Summary:Gill–netted samples of Arctic charr from Loch Rannoch, Scotland were bimodal when tested by univariate and multivariate morphometric analyses. The separation into two morphs corresponded very closely (95–98%) with fish classified subjectively in the field as benthic or pelagic, based largely on colour differences and ecological observations. The benthic charr had relatively longer heads, larger eyes and more powerful jaws than the pelagic charr. Unlike sympatric morphotypes described from Scandinavia and Greenland, neither Rannoch morph is dwarfed.

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