Effect of Diversity of Fish Landings on Sorting Time in Stick-held Dip Net Fishery

摘要

This study aimed to clarify the effect of the amount and composition of the fish landings on the sorting time of a stick-held dip net fishery through field surveys conducted at the Akune fishing port. The names of the fishing boats, the start and endtime of the sorting process, and the number of people involved in the sorting were recorded by visual observation. Landing slips issued by the Kitasatsuma Fisheries Cooperative located at the Akune fishing port were obtained to analyze the amount and composition of the fish landings. The slips showed the names of the fishing boats and the number of boxes for ざach species and size as well as those for aquaculture bait. The Simpson index (A) was used to indicate the complexity of the composition in the fish landings. The regression formulas obtained in this study showed that the sorting time per catch weight was greater when was larger, suggesting that sorting process can be improved more effectively when X decreases.