Journal of Fisheries and Life Sciences

Author(s): Shobha Rawat, S. Benakappa, Jitendra Kumar, A. S. Kumar Naik, Gayatri Pandey and C. W. Pema

Abstract: Stock identification is an interdisciplinary field that involves the recognition of self-sustaining components within natural populations. The concept of stock separates the population into groups with different growth rates and reproductive dynamics, irrespective of genetic similarities. Morphometric differences among stocks of a species are recognized as important tool for evaluating the population structure and identifying stocks. The use of geometric pattern for determining the shape of an organism can be used as a tool for stock identification. It has evolved as effective technique in stock management and conservation programmes in determining the stock. Truss Network System is a landmark-based technique using geometric morphometrics and imposes no restrictions on the direction of variation or localization of shape changes. It is highly effective in capturing information about the shape of an organism. Truss network measurements are a series of distances calculated between landmarks that form a regular pattern of connected quadrilaterals or cells across the body form. Identifying stocks, discriminating among them and determining the stock composition of mixed stocks are integral elements of fishery management. Determination of the population structure of species is an essential component for the successful management of fisheries.