Online ISSN : 1349-998X
Print ISSN : 0021-5392
Anguillid Leptocephali from the Waters South of Okinawa and East of Taiwan and Luzon, Western North Pacific, in 1986
Osame TabetaNoritaka Mochioka
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1988 Volume 54 Issue 6 Pages 935-940


A total of 27 specimens of the anguillid leptocephali were collected by the R. V. Hakuho Maru, Ocean Research Institute, University of Tokyo, in the waters south of Okinawa and east of Taiwan and Luzon in September 1986. These leptocephali were identified as 21 Anguillia japonica Temminck et SchlegeI, one A. bicolor pacifica Schmidt, and five A. marmorata Quoy et Gaimard and/or A. celebesensis Kaup based on the segmental characters. The present A. japonica leptocephali were 33.9-47.0 (mean 43.1)mm TL, and were smaller than those of the previous collections. The location and month of the capture extended spatially and temporally the distribution of the Japanese eel leptocephali in the sea. The smallest specimen (33.9mm TL) in the present A. japonica leptocephali, the youngest larva hitherto known from the field, was collected in the waters east of Luzon. All the leptocephali of other Anguilla species were found in the waters south of 17°N except one specimen.

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