Sreelekshmi S, Benno Pereira F G, Binil V Shijith
Department of Aquatic Biology and Fisheries, University of Kerala, Kerala, India
Department of Zoology, University of Kerala, Kerala, India
Key words: Devario species, Morphometry, Length- weight relationship, Condition factor, Cyprinids
Morphometric parameters, length-weight relationship and condition factor of indigenous fish belong to Devario genus, with great export and economic potential was evaluated from three different river systems of South Kerala, viz, Neyyar, Vamanapuram and Karamana river system. Since the taxonomy and nomenclature of many Cyprinids are being modified, morphometric evaluation of any Cyprinid is significant to reduce the ambiguity in taxonomy and systematics especially to delineate and document the population or habitat/environmental differences within species. A total of 19 morphometric parameters including length and weight of D. species was recorded from three river systems and compared statistically. Principal Component Analysis (PCA) was employed to delineate the habitat difference in the same species and elucidated head length as first principal component followed by snout length and pre orbital length were identified as second principal component and body depth as third principal component to distinguish three populations of the same species. Again morphometric comparison using ANOVA revealed that snout length, eye diameter and pre orbital length and pectoral fin length differed significantly between habitats within same species. Length weight relationship showed a negative allometric growth between rivers and condition factor showed fishes were in good condition with Fulton condition factor above unity.
Get The Original Articles in Source: Morphometric evaluation of an indigenous fish belong to genus Devario from three river systems of South Kerala
Published By: International Network for Natural Sciences