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

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  • 本州東方沖から得られたイレズミコンニャクアジの仔稚魚

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Description

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.

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Details 詳細情報について

  • CRID
    1390282679744472064
  • NII Article ID
    130004019298
  • DOI
    10.11369/jji1950.49.97
  • ISSN
    18847374
    00215090
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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