Egg Development and Growth of Larval and Juvenile Cultured Chub Mackerel Scomber japonicus (Perciformes: Scombridae) in a Captive Spawning Experiment

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  • MURATA Osamu
    Fisheries Laboratory of Kinki University, Shirahama Experimental Station
  • YAMAMOTO Shinji
    Fisheries Laboratory of Kinki University, Shirahama Experimental Station
  • ISHIBASHI Ryo
    Fisheries Laboratory of Kinki University, Shirahama Experimental Station
  • OKA Yusuke
    Fisheries Laboratory of Kinki University, Shirahama Experimental Station
  • YONESHIMA Hisashi
    Fisheries Laboratory of Kinki University, Shirahama Experimental Station
  • KATO Keitaro
    Fisheries Laboratory of Kinki University, Shirahama Experimental Station
  • MIYASHITA Shigeru
    Fisheries Laboratory of Kinki University, Shirahama Experimental Station
  • KUMAI Hidemi
    Fisheries Laboratory of Kinki University, Shirahama Experimental Station

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Other Title
  • マサバ養成親魚の自然産卵と卵発生および仔稚魚飼育
  • マサバ ヨウセイ オヤウオ ノ シゼン サンラン ト ラン ハッセイ オヨビ シチギョ シイク

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Abstract

We observed the spawning of chub mackerel Scomber japonicus eggs under a light microscope in 2002. The chub mackerel were kept at the Fisheries Laboratory, Kinki University, Shirahama Experimental Station since 1999. Mature males and females (BL: 33.5±2.3 cm BW: 577.9±144.8g, n=50) were kept in 50 ton spawning tank between May to July. A total of 8.6×104 fertilized eggs from broodstocks were obtained from spawning over a 46 day period. The egg diameter was 1.09±0.02mm in the pre-spawning period, and 0.90±0.02mm in the post spawning period. The eggs hatched 39-40h after fertilization at 20-21°C, and the hatching rate was 10.0-96.7%. The newly hatched larvae measured 3.56±0.08mm in total length. The larvae fed 3 days after hatching on the rotifer Brachionus rotundiformis. On the 7th, 9th and 11th day after hatching, we fed the larvae Artemia Franciscan and formulated food. The total length of the larvae reached 12.60±0.91mm after 10 days, 58.90±6.02mm after 20 days, and 96.02±4.89 mm after 30 days.

Journal

  • Aquaculture Science

    Aquaculture Science 53 (3), 319-324, 2005

    Japanese Society for Aquaculture Science

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