Population dynamics of snakehead (Channa striata) and marble goby (Oxyeleotris marmorata), their management in Bilibili Reservoir, South Sulawesi

Abstract

Bilibili Reservoir in Gowa Regency, South Sulawesi, has multipurpose functions. This study aims to estimate population dynamic parameters of snakehead and marble goby fish. Research and data collection were carried out from March to August 2020. Fish samples were obtained from fishermen’s catch using gill nets, longlines and nets. Analysis using Microsoft Excel data processing application and FISAT program. The results for snakehead fish, infinity length (L∞) 41.16 cm, growth coefficient (K) 0.6 per year and theoretical age (to) 0.24 years. Natural mortality rate (M) is 1.188 per year, the total mortality (Z) is 2.51 per year. Mortality due to fishing is 1.322 per year and exploitation rate is 0.52. As for marble goby fish, infinity length (L∞) is 33.91 cm, growth coefficient (K) is 0.64 per year, and the theoretical age (to) is 0.24 per year, natural mortality rate (M) is 1.308 per year, total mortality (Z) is 2.63 per year, mortality due to fishing is 1.322 per year, and exploitation rate is 0.50. Management of snakehead fish in Bilibili Reservoir can be done by: regulations on the use of fishing gear and methods or may be limited by fishing quotas, while the marble goby fish, can be used more as a highly nutritious consumption fish.