飼育したカマキリ仔稚魚の行動と形態の変化

DOI 日本農学文献記事索引 被引用文献2件 参考文献13件

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タイトル別名
  • Behavioral and Morphological Changes in Reared Larvae and Juveniles of the Four-Spine Sculpin, Cottus kazika.

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The behavioral and morphological changes with growth in reared larvae and juveniles of the four-spine sculpin, Cottus kazika were observed. Specimens used for breeding were wild mature fish collected from Kuzuryu River in Fukui Prefecture. Natural spawnings occured 13 times during the period from February 2 to April 2. The eggs were light yellow in color and their diameters were 1.70 to 1.81mm. The eggs were adhesive and clung to each other forming an egg-cluster.<BR>The newly hatched larvae had large yolk sacs and from one to several oil globules. At birth, total length of the larvae was 6.2mm; total length increased to 22.2mm after 80 days. The larvae started to swim up to the surface and ate rotifers 8 days after hatching (7.1mm in total length) . Larvae at 41 days (13.1mm in total length) tended to swim at the bottom of the tank. At 50 days (16.3mm in total length), they lingered at the bottom and started to prey on each other. The larvae transformed into juveniles 74 days after hatching (21mm in total length) .<BR>The appearance of melanophores and the formation of spines were compared with wild specimens.

収録刊行物

  • 水産増殖

    水産増殖 43 (1), 11-18, 1995

    日本水産増殖学会

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