Broodstock Rearing and Egg-taking from Spotted parrot fish Oplegnathus punctatus in Chichi-jima, Ogasawara Islands, Southern Japan

DOI JASI 10 References
  • KAWABE Katsutoshi
    Oshima Branch, Tokyo Metropolitan Islands Area Research Center of Agriculture, Forestry and Fisheries
  • KIMURA Johnson
    Tokyo Metropolitan Ogasawara Fisheries Center

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Other Title
  • 小笠原諸島父島におけるイシガキダイの親魚養成と採卵

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Abstract

The spawning of captive-reared spotted parrot fish Oplegnathus punctatus obtained from rocky shore waters around Chichi-jima, one of the Ogasawara Islands, was observed during rearing between 2002 and 2003. The two females which participated in the spawning were 3.2 and 4.5 kg in BW. Spawnings were observed on 18 occasions between late April and late June. The water temperature in the entire period varied between 18.8°C and 29.6°C whereas that on the spawning days varied between 21.1°C and 24.6°C. The total number of eggs taken was approximately 7 million. The average rate of buoyant eggs was 82.5±23.7%. The average diameter of the egg and oil globule were 1.045±0.017 mm and 0.245±0.006 mm, respectively.

Journal

  • Aquaculture Science

    Aquaculture Science 55 (1), 135-136, 2007

    Japanese Society for Aquaculture Science

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