EFFECT OF HANGING RATIO ON THE CATCHING EFFICIENCY OF GILLNET ON CATFISH AN UNDERGRADUATE RESEARCH PROJECT

This study evaluate the selectivity and efficiency of different hanging ratios of gillnets for capturing fish in terms of both number and weight, focusing on Clarias gariepinus in Sabiyel Lake over a three-month period. The selectivity of the gillnets, defined by their hanging ratios (0.5, 0.6, 0.65, and 0.75), was assessed for different fish size categories, revealing that the hanging ratios of 0.5 and 0.6 were the most effective in capturing fish, with the highest total catch observed in July and August. The effective of the gillnets was also measured my the weight of the captured fish, with hanging ratios of 0.5 and 0.6 showing superior performance in terms of the average weight of the fish caught. A total of 943 fish were captured during the study period, with hanging ratios of 0.5 and 0.6 contributing to the most significant catches in both the number and weight categories. The findings suggest that nets with hanging ratios between 0.5 and 0.6 are ideal for efficient fish capture without negatively affecting fish stocks. This research provides valuable insights for sustainable fisheries management and the use of gillnets in local fishing communities. Recommendations include the continued use of these hanging ratios to ensure the sustainability of fish stocks and regular training for fishermen in the proper use of gillnet.