Morfometric Character of Longtail Tuna (Thunnus Tonggol)

Abstract Longtail tuna is a pelagic fish that has wide distribution from the Java Sea to Natuna or South China Sea. This study aims identified character of population and determine differences in population/stock longtail among stock Sampling was carried out May 2018 April 2019, Pekalongan representing Sea, Pemangkat west Tanjung Pinang east The morphometric measurement consists 20 characters, data standardized by dividing all characters standard length (SL). Principal components discriminant functions analysis employed analyze variables obtain distinguishing identification. Discriminant Analysis see intra inter-population sharing using SPPS ver.16 software. results (PCA) found there are two namely: pelvic fin (PeL) anal (PAF) characters. Canonical subpopulation tuna, which one sub other population.