シンガポ-ル・カンカ-魚市場に水揚げされるトラッシュ・フィッシュ(雑魚)の予備調査〔英文〕

概要

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Samples of trash fish were collected monthly from trawlers at Kangkar Fish Market in Singapore for 1974-1975. The amount of trash fish was 1, 574.1 ton in 1974 and 1, 155.5 ton in 1975, which constituted 35.2% and 28.8% of total Inadings, respectively. The specimens were classified into species level or at least to the genus; 100 species representing 51 families were identified. The major components of trash fish were Mullidae, Sciaendidae, Nemipteridae, Synodontidae, Gerridae, Leiognathidae and Parapercidae, together comprising about 80% in weight of the total trash fish sampled. The composition of the trash fish can be divided into three categories, juveniles of commercially important species (31.7%) of the total trash fish in weight, low-valued species (47.6%) and species unaccepted for human consumption (21.6%). On the size analysis of important species which form the main resources for commercial trawl fisheries, it was found that the fishes were too small to exploit from the viewpoint of the optimum size at which the population attains its maximum weight. Capture of the juveniles seems to be due mainly to the small mesh net of cod-end commonly used in the region.
日本水産學會の論文