Occurrence and seasonality of Gyrodactylus salaris and G. salmonis (Monogenea) on Arctic char (Salvelinus alpinus (L.)) in the Fustvatnet lake, Northern Norway

Gyrodactylus spp. (Monogenea) were found on 16.9% (233 out of 1376) Arctic char, Salvelinus alpinus (L.), sampled from September 2010 to October 2011 in the Fustvatnet lake, Northern Norway. Two species were identified: G. salaris Malmberg, 1957, and G. salmonis Yin and Sproston (Sinensia, 19, 1948)...

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Bibliographic Details
Published in:Journal of Fish Diseases
Main Authors: Mo, Tor Atle, Hansen, Haakon, Hytterød, Sigurd
Format: Article in Journal/Newspaper
Language:English
Published: 2023
Subjects:
VDP::Klinisk veterinærmedisinske fag: 950
VDP::Clinical veterinary sciences: 950
Arctic
Norway
Fustvatnet
Nordland
Northern Norway
Salvelinus alpinus
Online Access:https://hdl.handle.net/11250/3042147
https://doi.org/10.1111/jfd.13752
Description
Summary:Gyrodactylus spp. (Monogenea) were found on 16.9% (233 out of 1376) Arctic char, Salvelinus alpinus (L.), sampled from September 2010 to October 2011 in the Fustvatnet lake, Northern Norway. Two species were identified: G. salaris Malmberg, 1957, and G. salmonis Yin and Sproston (Sinensia, 19, 1948). Gyrodactylus salaris was only found on Arctic char larger than 28 cm and only in samples obtained in the autumn (September and October). Gyrodactylus salmonis was found on Arctic char of all sizes (11–47 cm) and throughout the year, with a small peak in abundance in the late autumn (November). Gyrodactylus salaris was found to prefer the tail and dorsal fin. Based on the results, we recommend that surveys of Arctic char for the presence of G. salaris are based on the examination of the fins of large fish sampled during the spawning season (autumn). ectoparasites, monitoring, salmonids, seasonal abundance, site distribution publishedVersion

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