Abstract
The capture process of a set net may be closely related to physical environmental conditions such as the current profile influencing its passive catching function. In this paper, attention is focused on how the current profile change due to wind affects the capture process of a set net. To obtain basic data on the relationship between capture process and current profile near a set net, the current magnitude was recorded continuously for 30 min with the aid of a current meter set on the bottom. A series of sampling was done from 2 June to 17 August 2000 in the south-basin fishing ground of Lake Biwa, Japan. The catches were concentrated during a NNE and SSW current and a large quantity of catch was taken during a NNW current with a low velocity ranging from 3 to 5cm•s-1. The results suggested that the amount of catch is controlled by current profile, which is therefore an important short-term factor controlling the capture process of a set net.
