IngentaConnect Distribution and characterization of species of Gyrodactylus Nord...

Authors: Shinn, A.P.¹; Sommerville, C.²; Gibson, D.I.¹

Source: Journal of Natural History, Volume 29, Number 6, November-December 1995 , pp. 1383-1402(20)

Abstract:

The reported pathogenicity of the monogenean Gyrodactylus salaris Malmberg, 1957 on Atlantic Salmo salar in Norway has necessitated a national survey of salmonid sites throughout the British Isles to determine which species of the genus Gyrodactylus are resident on these hosts in British waters. Eight morphotypes were identified following examination of the opisthaptoral sclerites at both the light and scanning electron microscope level. Gyrodactylus truttae Gläser, 1974 was found on wild brown trout Salmo trutta in Scotland, England and Wales with an uncharacteristic morphotype, having long, thin marginal hooks. Two morphotypes of Gyrodactylus derjavini Mikailov, 1975 were recorded for the first time from Britain. G. caledoniensis n. sp. from Scottish S. salar is erected, based on differences in the shape and size of the marginal hooks. Two possible new species from English Salvelinus alpinus and a possible new species from Welsh S. salar and Scottish O. mykiss are described.

Keywords: Gyrodactylus; salmonids; distribution; discrimination; morphology; sclerites; British Isles

Document Type: Research article

DOI: 10.1080/00222939500770581

Affiliations: 1: Department of Zoology, The Natural History Museum, Cromwell Road, London, SW7 5BD, UK 2: Institute of Aquaculture, University of Stirling, Stirling, FK9 4LA, UK

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Distribution and characterization of species of Gyrodactylus Nordmann, 1832 (Monogenea) parasitizing salmonids in the UK, and their discrimination from G. salaris Malmberg, 1957