Biologi Reproduksi Ikan Senangin (Eleutheronema tetradactylum) yang Didaratkan Di Tempat Pendaratan Ikan (TPI) Gabion Belawan, Provinsi Sumatera Utara

Abstract

The four-finger threadfin (Eleutheronema tetradactylum) is an economically important demersal fish resource widely exploited by coastal communities. High fishing pressure may affect population structure and resource sustainability; therefore, biological studies are required as a scientific basis for sustainable fisheries management. This study aimed to analyze the growth pattern of the four-finger threadfin based on growth parameters and population characteristics. The study was grounded in fish growth theory and population dynamics concepts, particularly the Von Bertalanffy growth model, supported by previous studies on the family Polynemidae. The research was conducted using a survey method by collecting fish samples obtained from fishermen’s catches during the study period. Length data were analyzed using the ELEFAN I module to estimate growth parameters, including asymptotic length (L∞), growth coefficient (K), and theoretical age at zero length (t₀). The results indicated differences in growth parameters between male and female fish, where males exhibited a larger asymptotic length, while females showed a higher growth rate. The growth pattern of E. tetradactylum followed the Von Bertalanffy growth curve, characterized by rapid growth during early life stages and a gradual decline as age increased. In conclusion, the growth characteristics of the four-finger threadfin reflect biological adaptations to the aquatic environment and can serve as a scientific reference for sustainable management and utilization of this fishery resource.