Please use this identifier to cite or link to this item:
Appears in Collections:Aquaculture Journal Articles
Peer Review Status: Refereed
Title: Multivariate analyses of morphometrical features from Gyrodactylus spp. (Monogenea) parasitising British salmonids: Light microscope based studies
Authors: Shinn, Andrew
Des, Clers Sophie
Gibson, David
Sommerville, Christina
Contact Email:
Issue Date: Feb-1996
Publisher: Springer
Citation: Shinn A, Des Clers S, Gibson D & Sommerville C (1996) Multivariate analyses of morphometrical features from Gyrodactylus spp. (Monogenea) parasitising British salmonids: Light microscope based studies, Systematic Parasitology, 33 (2), pp. 115-125.
Abstract: Species determination within the genus Gyrodactylus Nordmann, 1832 is based upon subtle differences in marginal hook morphology and has long posed taxonomic problems. This study uses univariate and multivariate analyses in an attempt to elucidate the Gyrodactylus species parasitising British salmonids. A total of 389 parasites were collected at 69 of 227 localities sampled throughout the British Isles from four salmonid host species, Salmo salar, Salmo trutta, Oncorhynchus mykiss and a limited number of Salvelinus alpinus. A small number of known species of Gyrodactylus from outside the UK were also added to the data set. Morphometric data on the sclerites were collected from slide preparations of Gyrodactylus using light microscopy. Univariate statistics were used to select 11 of the 18 useful morphometric features defined by Malmberg (1970) on the basis of those with the smallest natural variability and/or measurement error. The data, relating to the 11 variables chosen, were then analysed using principal components analysis (PCA) to describe the forms present. Initial outliers included foreign species of Gyrodactylus and an accidental infection by a gasterosteid form. Two major groups were resolved: one on S. salar and O. mykiss, the specimens from which resembled G. derjavini Mikailov, 1975 and G. caledoniensis Shinn et al. in press; and one on S. trutta, which was identified as G. truttae Gläser, 1974. The analysis, in addition to showing which were useful morphometric features, also demonstrated the limitations of data obtained from the smallest features when using the light microscope.
Type: Journal Article
DOI Link:
Rights: The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.
Affiliation: Aquaculture
Imperial College London
The Natural History Museum

Files in This Item:
File Description SizeFormat 
Shinn, Des Clers, Gibson & Sommerville 1996.pdf6.31 MBAdobe PDFUnder Embargo until 31/12/2999     Request a copy

Note: If any of the files in this item are currently embargoed, you can request a copy directly from the author by clicking the padlock icon above. However, this facility is dependant on the depositor still being contactable at their original email address.

This item is protected by original copyright

Items in the Repository are protected by copyright, with all rights reserved, unless otherwise indicated.

If you believe that any material held in STORRE infringes copyright, please contact providing details and we will remove the Work from public display in STORRE and investigate your claim.