Abstract
The accumulation performance of the large-scale set net for chum salmon Oncorhynchus keta was evaluated using catch data in Iwate Prefecture from 1994 to 1998. The accumulation index (ratio of catch per intermittent haul to catch per successive haul) was higher than unity with an average of 1.85, showing that intermittent haul led to significantly higher catch. The accumulation performance was not influenced by the set net design or the bag net volume. However, there was a significant correlation between the bag net volume and the catch per haul. We consider that a high level of capacity in the bag net and final trap can successfully accumulate chum salmon.
