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Appears in Collections:Aquaculture Journal Articles
Peer Review Status: Refereed
Title: Gender distribution, sexual size dimorphism and morphometric sexing in ballan wrasse Labrus bergylta
Author(s): Leclercq, Eric
Grant, Bridie
Davie, Andrew
Migaud, Herve
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Keywords: gender identification
geometric morphometrics
mass–length relationship
truss network analysis
Issue Date: Jun-2014
Date Deposited: 14-Jul-2015
Citation: Leclercq E, Grant B, Davie A & Migaud H (2014) Gender distribution, sexual size dimorphism and morphometric sexing in ballan wrasse Labrus bergylta. Journal of Fish Biology, 84 (6), pp. 1842-1862.
Abstract: In wild ballan wrasse Labrus bergylta, mass-length relationships were not different between genders, and positive allometry was found in the mixed-gender population. Male-biased sexual size dimorphism was significant and the most effective morphometric method for sexing L. bergylta outside of the species spawning window used body mass (MB in g), total body length (LT in mm) and Fulton's condition factor (K) as discriminant variables to predict gender with 91% accuracy. The discriminant score (SD) of a specimen can be calculated as SD = 0·01MB - 0·016LT - 3·835K + 6·252 to predict its gender as female or male if SD is < 1·459 or SD is > 1·504, respectively. There was a potential trend towards earlier sexual inversion compared to previous studies at comparable latitudes. Sex change is a phenotypically plastic trait under social control in haremic fishes and should be monitored in increasingly exploited L. bergylta.
DOI Link: 10.1111/jfb.12402
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