ヒメオコゼ及びアブオコゼ幼魚の出現水域について

抄録

As shown in Table 1,116 individuals of young Minous monodactylus from 10 stations and seven individuals of young Erisphex potti from five stations had been collected by the horizontal surface hauls with the larval net, during the period from 1953 to 1960. The tows of the larval net had been repeated 1271 times. The period of occurrence of these juveniles covers most part of the year, and the range of surface water temperature and chlorinity in which they occur is rather wide. But neither young Minous monodactylus nor young Erisphex potti occurred when the chlorinity exceeded 18.9 per cent. In spite of the above mentioned fact, the locality (the sea area of occurrence) of the young of both species was limited to a restricted area of the northern part of the East China Sea. It was found that all stations where the young of these two species were collected are situated in the cold water mass originating in the Yellow Sea and descending southwards into the northern and central parts of the East China Sea. It is supposed that one of the principal grounds of spawning and nursery exist in this cold water mass. The time of occurrence were all in the night ranging from 20 : 20 to 05 : 20,and the depth of the stations where the young were caught is shallow ranging from 40m to 94m. It seems that these young live in the sea bottom in the daytime, and take to pelagic life at night.