定置網模型に対する魚群行動実験及びその解析

概要

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Water tank experiments of fish behavior to model net were made by using Rhodues ocellatus ocellatus. Trap net with a leader net, play-ground and two bag nets was used as the model net and its function was discussed in conjunction with fish behavior. Also the entering and leaving behavior of fish to the model trap net was observed and analyzed by using a video position analyzer system.Results of analysis of fish behavior showed that the average swimming speed and separation distance between fishes were different in each part of the net in the following decreasing order; outside of the net>inside of the net (play-ground)>inside of the bag net.It was suggested that the difference of the fish behavior before and after entering the net was closely connected with the different functions (swimming space and the construction) of each part of the net.
日本水産學會の論文