Please use this identifier to cite or link to this item:
Appears in Collections:Aquaculture Journal Articles
Peer Review Status: Refereed
Title: Morphometric discrimination of Gyrodactylus salaris Malmberg (Monogenea) from species of Gyrodactylus parasitising British salmonids using novel parameters
Author(s): Shinn, Andrew
Gibson, David
Sommerville, Christina
Contact Email:
Keywords: discrimination
G. salaris
multivariate analysis
Issue Date: Feb-2001
Date Deposited: 14-Nov-2012
Citation: Shinn A, Gibson D & Sommerville C (2001) Morphometric discrimination of Gyrodactylus salaris Malmberg (Monogenea) from species of Gyrodactylus parasitising British salmonids using novel parameters. Journal of Fish Diseases, 24 (2), pp. 83-97.
Abstract: Morphometric data were collected from scanning electron micrographs of released hamuli and marginal hooks collected from five species and three morphotypes of Gyrodactylus parasitising salmonids in the UK and Canada. Five new parameters for measurement from the hamulus are described: shaft-point length, hamulus angle, hamulus width, shaft area and the root area; and three from the marginal hook: sickle aperture, toe length and the marginal hook area. Univariate statistics were used to select seven of nine useful metrical hamulus features and seven of eight marginal hook features. Of the hamulus features, the shaft-point length discriminated all Gyrodactylus salaris populations from all other Gyrodactylus populations and the hamulus angle discriminated only the Swedish G. salaris populations from those gyrodactylids on British salmonids. The marginal hook features, the sickle length, sickle aperture, total length and shaft length of G. salaris were significantly larger than those of all other gyrodactylids included within the study. Of the British fauna, it was found that G. derjavini from Welsh salmon was significantly smaller than all other British collections of Gyrodactylus in this study, having smaller hamuli point lengths, total lengths and shaft lengths. Separate principal components analyses were performed on the variables selected for the hamuli and for the marginal hooks. The principal component analysis (PCA) analysis demonstrated that individual structures from either the hamulus or the marginal hook, significantly discriminate every specimen of G. salaris from all other gyrodactylid specimens included within the analysis. The discrimination of G. derjavini from G. truttae by this method, was however, not possible and the description of additional morphometric parameters may be necessary before this separation can be achieved.
DOI Link: 10.1046/j.1365-2761.2001.00272.x
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.
Licence URL(s):

Files in This Item:
File Description SizeFormat 
Shinn Gibson Sommerville 2001 JFD 24.pdfFulltext - Published Version800.12 kBAdobe PDFUnder Embargo until 2999-12-29    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 dependent 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.

The metadata of the records in the Repository are available under the CC0 public domain dedication: No Rights Reserved

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.