MORPHOMETRIC ANALYSIS AND REPRODUCTION OF BIGEYE SCAD Scomber crumenophthalmus (BLOCH, 1793) CAUGHT AT TPI SOUTH BUTON REGENCY

Bigeye scad (Scomber crumenophthalmus) is a small pelagic species of high economic value that is commonly found in tropical waters, including those in South Buton.This study aims to analyze the length-weight relationship, length distribution, gonadal maturity stages (GMS), and to determine the first maturity size (L) as a foundation for sustainable fisheries management.The research was conducted from July to September 2023 using a purposive sampling method, in which fish samples were collected from local fishermen's catches.The parameters measured included total length, body weight, and gonadal maturity stage.The length-weight relationship was analyzed using an allometric equation, while gonadal maturity stages were assessed through macroscopic classification.The results showed that bigeye scad had a length range of 176-223 mm, with the highest frequency in the 200-205 mm size class.The length-weight relationship followed the equation W = 2.4983L -4.0765, indicating a negative allometric growth pattern (b < 3).The analysis of gonadal maturity stages revealed that most individuals were at GMS stages III-V, with the first maturity size (L) determined to be 194.455mm.Based on the research period and GMS distribution, it is presumed that the spawning season occurs from October to early the following year.In conclusion, it is recommended to establish a minimum catch size above 194.455mm and manage the fishing season with consideration of the spawning period, in order to maintain population balance and ensure the sustainability of bigeye scad stocks in South Buton waters.