caa a22 4500 465810934 CHVBK 20180323112116.0 cr unu---uuuuu 170327e19901201xx s 000 0 eng 10.1007/BF02123500 doi (NATIONALLICENCE)springer-10.1007/BF02123500 Life history of Euphausia similis (crustacea, euphausiacea) in Sagami Bay, central Japan [Elektronische Daten] [Yuichi Hirota, Takahisa Nemoto, Ryuzo Marumo] The life history ofEuphausia similis G.O. Sars in Sagami Bay, central Japan, has been studied by examining the abundance, size distribution, and occurrence of each growing stage from egg to adult. Three cohorts were laid within the period from July 1979 to July 1980. Individuals of cohort I of 1980 were laid in November and December 1979, and matured and spawned in March and April of the following year. Those of cohort II of 1980 laid in January and February 1980 should mature in November and spawn after December, by analogy with cohort II of 1979. Cohort III of 1980 was laid in April 1980, but decreased in number in July. Cohort II was the dominant cohort in Sagami Bay throughout the period studied. From December 1979 to April 1980 when the mixing layer was present, many eggs ofE. similis were in the epipelagic zone. It is suggested that the spawning season ofE. similis roughly coincided with the season of active feeding, indicated by high fullness of stomachs in individuals. The production of juveniles and adults was about 1.33 mg C m−2 day−1, and the production to bio mass (P/B) ratio was estimated to be 4.78 between July 1979 and July 1980. Oceanographical Society of Japan, 1989 Hirota Yuichi Japan Sea National Fisheries Research Institute, Suido-cho, 951, Niigata, Japan aut Nemoto Takahisa Ocean Research Institute, University of Tokyo, 1-15-1 Minamidai, Nakano-ku, 164, Tokyo, Japan aut Marumo Ryuzo Nodai Research Institute, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya-ku, 156, Tokyo, Japan aut Journal of the Oceanographical Society of Japan Kluwer Academic Publishers 46/6(1990-12-01), 237-249 0029-8131 46:6<237 1990 46 10872 https://doi.org/10.1007/BF02123500 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02123500 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Hirota Yuichi Japan Sea National Fisheries Research Institute, Suido-cho, 951, Niigata, Japan aut NATIONALLICENCE 700 1- Nemoto Takahisa Ocean Research Institute, University of Tokyo, 1-15-1 Minamidai, Nakano-ku, 164, Tokyo, Japan aut NATIONALLICENCE 700 1- Marumo Ryuzo Nodai Research Institute, Tokyo University of Agriculture, 1-1-1 Sakuragaoka, Setagaya-ku, 156, Tokyo, Japan aut NATIONALLICENCE 773 0- Journal of the Oceanographical Society of Japan Kluwer Academic Publishers 46/6(1990-12-01), 237-249 0029-8131 46:6<237 1990 46 10872 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer