タイ湾の灯火敷網によるイカ漁獲量の解析〔英文〕

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Experimental light luring fishing was conducted in west coast of the Gulf of Thailand using a stick-held cast net. A variety of fishes were simultaneously caught with a higher proportion of commercially important Indian squid Loligo duvauceli. Three trends in catch of squid observed might directly be correlated to the catch of other species simultaneously captured. It was clearly shown that the catch of Indian squid reached its maximum level (10-20kg/haul) at the catch of other species approximately 0.5-1.0kg/haul. The relationship between the presence of other species and the amount of squids caught were analyzed in consideration of size structure of both Indian squid L. duvauceli, and Indian mackerel Rastrelliger kanagurta, commonly apperaring in the catches. The catch of larger size squid more than about 15cm mantle length seemed to be correlated with the presence of Indian mackerel.
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