著者

塩垣 優

出版者

The Ichthyological Society of Japan

雑誌

魚類学雑誌 (ISSN:18847374)

巻号頁・発行日

vol.29, no.1, pp.102-104, 1982

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A total of 70 larvae and juveniles of <I>Cryptacanthodes bergi</I> (Cryptacanthodidae, Blennioidei) were collected by a fish larva net towed off the east coast of Aomori Pref.in the northwestern Pacific Ocean.The larvae and juveniles, measuring from about 15 to 31.5 mm TL, were collected at the sea surface from March to June, mainly by night hauls.In a 18.0mm TL postlarva, the body is elongated and compressed.The anus opens a little ahead of the midpoint of the body.The eyes and pectoral fins are large.The body is densely pigmented along each myotome except for the abdomen and caudal peduncle.Along the middorsal line, there is a longitudinal white area which is wider anteriorly.The myotome count is 74 (24+50).In a 30.0mm TL juvenile, the body is much elongated and compressed, and the eyes and pectoral fins are relatively small.The lower jaw protrudes beyond the upper jaw and forms a wry mouth.The pelvic fins are absent.Head sensory canals are not well developed and have some outer openings.<BR>A gravid female, collected on Oct.6, 1977, from muddy bottom at a depth of 50-60m in Mutsu Bay off Aomori City, has 249 maturing orange yellow eggs measuring 1.7 to 2.2mm in diameter.Its ovary is a single type.<BR>A similarity in the distribution of melanophores between larvae of <I>C.bergi and Zaprora silenus</I> (Zaproridae) was detected.