Basic Research on Aquaculture of Sturgeon-II. Characteristics of Eggs and Larval of Bester F2(Hybrid Sturgeon).

• SHIRAISHI Manabu

  水産庁養殖研究所

• FUJII Kazunori

  水産庁養殖研究所

• MARUYAMA Tamezo

  共和コンクリート株式会社

Bibliographic Information

Other Title

• チョウザメ養殖の基礎的研究‐ＩＩ　ベステルＦ２（チョウザメ雑種）の卵仔魚期の特性
• ベステルF2(チョウザメ雑種)の卵仔魚期の特性

Abstract

To establish the basis for sturgeon breeding techniques, we evaluated egg quality, incubation and laval rearing temperatures.<BR>The fertilization and hatching rates, and the rate of deformed larvae correlated with the amount of serum vitellogenin in mother fish. The highest rates of fertilization (92%) and hatching (79.6%) and the lowest rate of deformed larvae (5.1%) were observed in the eggs of females with the lowest vitellogenin (1.0 mg/ml) . As vitellogenin level increased, the fertilization and hatching rates became lower, whereas rete of the deformed larval increaced.<BR>Incubation temperature (10, 15, 20°C) also had an effect on the hatching rate. The highest hatching rate (88.1%) was observed at 15°C . As temperature rose, the rate of deformed larvae became lower and the period required to hatch became shorter. Water temperature also had an effect on the consumption of yolk reseving and the onset of external feeding. At 20°C, there was a 3 day lapse between the end of yolk consumption and the start of food uptake. On the other hand, there was a 5-day overlap between both events at 15°C. The growth of sturgeon larvae at 20°C was faster than that at 15°C.<BR>These results suggest that the optimal temperature for incubating eggs and larvae until they become able to take food is 15°C, whereas optimal temperature for larvae after onset of feeding is 20°C. Therefore, control of water temperatures during egg and larva stage is important for efficient mass production of sturgeon seedlings.

Journal

• Aquaculture Science

  Aquaculture Science 43 (3), 407-413, 1995

  Japanese Society for Aquaculture Science

Keywords

• チョウザメ
• 卵仔魚
• ふ化率
• 成長

Details

• CRID: 1390001204715417216
• NII Article ID: 10004769828
• NII Book ID: AN00124667
• DOI: 10.11233/aquaculturesci1953.43.407
• ISSN: 21850194
• ISSN: 03714217
• Web Site: https://agriknowledge.affrc.go.jp/RN/2010570961
• Text Lang: ja
• Data Source:
  • JaLC
  • IRDB
  • CiNii Articles
• Abstract License Flag: Disallowed