Evaluation of attractiveness of angling bait extracts for oriental weatherfish using all the parameters of three logistic curves for different behavior

"Attraction activities of the 12 reoresentatives of fishing bait for oriental weatherfish Misgurnus anguillicaudatus were estimated by applying a logistic curve (y=g/{1+exp[-r(x-a)]})to the cumulated number polygons of the individuals entered into, left from, or retained in the baited sector, for the purpose of evaluating their attraction activities. paying attention to all the specificities, which were indicated by the respective oarameters of the curves. The following conclusions were obtained: (1) The variation in the narameters was large according to the baits. (2) When a bait was chosen because of its excellent specificity in one of the parameters, the change in another specificity, which was expressed as the correlated parameters, was inevitable. (3) The following baits were chosen by the desired specificity, which differed according to the role of the bait in the resDective fishing methods: the best bait for the nonreturn trap was the Japanese pilchard, the Dreferable baits for the open trap were the limpet, barnacle, Japanese river goby, Japanese pilchard, silkworm pupa, and earthworm, and the baits good for the longline and the non-return trap were the limpet, barnacle, Japanese river goby, and Japanese oilchard."