Karakteristik Organ Seksual Sekunder Ikan Tude Batu (Selar boops) Dari Perairan Bitung

Abstract

Selar boops, locally known as tude batu, is a small pelagic fish belonging to the Carangidae family. It is an economically valuable species caught using handlines in the waters around Bitung. This study aimed to identify secondary sexual characteristics through morphological differences between male and female fish. Samples were collected from Kampung Pisang and Winenet Market. Nineteen morphological characters were examined using the truss morphometric method, followed by Anova K-Means Cluster (AKMC) and discriminant analyses. The results identified 11 truss morphometric characteristics that differed between male and female fish. Discriminant analysis indicated that the ratio of pectoral fin length (PaSiPek) to head length (PaKe) could distinguish the sexes. Fish with discriminant values (D) below zero were classified as male, while those with values above zero were classified as female.