Details

Autor(en) / Beteiligte

• Okamoto, M. (Kitasato Univ., Sanriku, Iwate (Japan). School of Fisheries)
• Ida, H
• Sugisaki, H
• Kurita, Y

Titel

Development of ragfish, Icosteus aenigmaticus, (Perciformes: Icosteidae) larvae and juveniles from waters off eastern Japan

Ist Teil von

• Japanese Journal of Ichthyology, 2002/11/25, Vol.49(2), pp.97-102

Ort / Verlag

The Ichthyological Society of Japan

Erscheinungsjahr

2002

Quelle

SpringerLINK Contemporary (Konsortium Baden-Württemberg)

Beschreibungen/Notizen

• The larval and juvenile development of Icosteus aenigmaticus are described, based on 21 specimens (5.2-54.6mm in body length, BL) collected from waters off north-eastern Japan, and compared with 3 larval specimens (5.5-25.5mm BL) from Northeast Pacific. This report represents the first record of larvae from Northwest Pacific and the first description of juvenile of this species. Initially, larvae had a slender body obscured by thick membrane, but the body deepened with the growth. Head spines were small and limited to the preopercle outer mar-gin from onset of flexion through juvenile stages, number of spines variable 4-7. The final fin-ray complements being established at about 25 mm BL. Postflexion larvae and juveniles had pigmented blotches laterally on the trunk. Juveniles had 10+9 branched caudal-fin rays, a greater number than usual in percoids.