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Permanent link (DOI): https://doi.org/10.7939/R3F07J

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Effects of acanthocephalan parasites on colour and carotenoid quantities of their intermediate host Gammarus lacustris in the context of variable lake productivity Open Access

Descriptions

Other title
Subject/Keyword
acanthocephalans
amphipods
colour
carotenoids
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Balanean, Leontin
Supervisor and department
Rolf Vinebrooke (Biological Sciences)
Heather Proctor (Biological Sciences)
Examining committee member and department
David Coltman (Biological Sciences)
Heather Proctor (Biological Sciences)
Marianne Douglas (Earth and Atmospheric Sciences)
Rolf Vinebrooke (Biological Sciences)
Allen Shostak (Biological Sciences)
Department
Department of Biological Sciences
Specialization

Date accepted
2010-10-01T02:59:31Z
Graduation date
2010-11
Degree
Master of Science
Degree level
Master's
Abstract
I studied the effects of Polymorphus paradoxus Connell and Corner and Polymorphus marilis Van Cleave on colour and carotenoid quantities of their host amphipod Gammarus lacustris G.O. Sars in seven lakes in Alberta, Canada, that differed in productivity. Polymorphus marilis induced ‘pigmentation dystrophy’ and a higher degree of blueness in both amphipod sexes than did P. paradoxus. Colour shifted toward lighter, bluer and greener tones, denoting less carotenoids, in amphipods parasitized by P. marilis. This is the first study to measure host-colour changes induced by parasites using consistent, repeatable digital analysis. Maximum carotenoid quantities were reached in hypereutrophic lakes where parasite-induced colour changes were also generally minimal. I developed regression models that accurately predict carotenoid quantities in amphipods by their colour, parasite status and water chemistry. This is the first study showing that carotenoid quantities and parasite-induced colour change in crustaceans depend on lake productivity.
Language
English
DOI
doi:10.7939/R3F07J
Rights
License granted by Leontin Balanean (leontin@ualberta.ca) on 2010-09-29T18:32:02Z (GMT): Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of the above terms. The author reserves all other publication and other rights in association with the copyright in the thesis, and except as herein provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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