コウイカ類およびアオイカ稚仔の育成について

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Otr experiments carried out at the Ikawazu Fisheries Laboratory, Tokyo University in 1960 proved that the fry of the squid, Sepioteuthis lessoniana, could be grown on a live mysisshrimp, Neomysis japonica, in tanks with running water, and also the rearing tried in 1961 by the same method went successfully in three species of cuttlefishes, Sepia esculenta, Sepia subaculeata and Sepiella maindroni. 1) The fry of cuttlefish and squid begin to hunt almost within 24 hours after hatching, their prey then being tiny crustaceans, such as mysis and the other larvae of shrimps. The fry of these Cephalopods appear to find sufficient nutriment in only the live mysis during the period immediately after emergence from the egg until they grow a month old. At the end of this period the fry fed sufficiently grew up to be the mantle-length of about 20mm in the cuttlefishes and 30mm in the squid. The rate of survival in every one of these species was much high, amounting to more than 80 per cent of the original fry. 2) In the Sepia and Sepiella, as they grow older, living food materials could be replaced by minced fish meat or salted mysis-shrimp placed on the bottom of tank, but such replacement seemed to be difficult in the Sepioteuthis, because they hardly cared for the dead or motionless prey. 3) Among the Sepia and other species there are some differences not only in the feeding habit as mentioned above, but in the swimming activity observed in tanks. The Sepia being rather sluggish, although S. subaculeata swims slowly about near the bottom at times, usually lie on the bottom. On the other hand the Sepiella and Sepioteuthis swim about actively and in schools.
公益社団法人日本水産学会の論文

コウイカ類およびアオイカ稚仔の育成について

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