Prevalence and Intensity of Salmincola edwardsii in Brook Trout in Northwest New Brunswick, Canada.

Autor: White CFH; Canadian Rivers Institute, University of New Brunswick, Fredericton, New Brunswick, E3B 5A3, Canada.; Faculty of Forestry and Environmental Management, University of New Brunswick, Fredericton, New Brunswick, E3B 5A3, Canada., Gray MA; Canadian Rivers Institute, University of New Brunswick, Fredericton, New Brunswick, E3B 5A3, Canada.; Faculty of Forestry and Environmental Management, University of New Brunswick, Fredericton, New Brunswick, E3B 5A3, Canada., Kidd KA; Department of Biology and School of Geography and Earth Sciences, McMaster University, Hamilton, Ontario, L8S 4K1, Canada.; Canadian Rivers Institute, University of New Brunswick, Saint John, New Brunswick, E2L 4L5, Canada., Duffy MS; Canadian Rivers Institute, University of New Brunswick, Fredericton, New Brunswick, E3B 5A3, Canada.; Department of Biology, University of New Brunswick, Fredericton, New Brunswick, E3B 5A3, Canada., Lento J; Canadian Rivers Institute, University of New Brunswick, Fredericton, New Brunswick, E3B 5A3, Canada.; Department of Biology, University of New Brunswick, Fredericton, New Brunswick, E3B 5A3, Canada., Monk WA; Environment and Climate Change Canada at Canadian Rivers Institute, Faculty of Forestry and Environmental Management, University of New Brunswick, Fredericton, New Brunswick, E3B 5A3, Canada.
Jazyk: angličtina
Zdroj: Journal of aquatic animal health [J Aquat Anim Health] 2020 Mar; Vol. 32 (1), pp. 11-20. Date of Electronic Publication: 2020 Jan 21.
DOI: 10.1002/aah.10091
Abstrakt: Parasites can compromise the health and fitness of individual fish, and it is important to generate baseline information that can then be used to document changes in the abundance and distribution of potentially pathogenic parasites. The ectoparasitic copepod Salmincola edwardsii was assessed with respect to prevalence (percentage of infected fish per site), infection intensity (number of parasites per infected fish), and attachment location on Brook Trout Salvelinus fontinalis in northwest New Brunswick, Canada. Ten sample sites were assessed, with six sites on two streams in the Quisibis River basin and four sites on three streams in the Restigouche River basin. Parasite species identity was supported by 100% sequence identity with S. edwardsii in a variable region within 28S rDNA. The prevalence of fish infected per site ranged from 19.0% to 79.6%, with an overall prevalence of 48.5 ± 19.1% (mean ± SD) per site. Mean infection intensity was 1.5 ± 0.9 copepods/fish (range = 1-7), with parasites almost exclusively surrounding the dorsal fin and/or adipose fin (97.6%). There was no influence of trout age-class on parasite prevalence. Some fish presented with fin erosion at the site of parasite attachment (12.5%), and 6.2% also presented with hyperplastic skin lesions where no parasites were observed, that could be misinterpreted as secondary bacterial or fungal infections. Skin and fin damage were significantly more common when fish were infected with three or more individual parasites. The pathogenic potential of this parasite makes its presence noteworthy as a risk to salmonids that are both recreationally and ecologically important.
(© 2020 American Fisheries Society.)
Databáze: MEDLINE
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