ズワイガニ幼生の生残と脱皮・成長に及ぼすn-3高度不飽和脂肪酸の影響  [in Japanese] Effect of dietary n-3 highly unsaturated fatty acids on survival, molting and growth of larval snow crab Chionoecetes opilio reared in the laboratory  [in Japanese]

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Author(s)

    • 小金 隆之 KOGANE TAKAYUKI
    • (独)水産総合研究センター小浜栽培漁業センター Obama Station, National Center for Stock Enhancement (NCSE), Fisheries Research Agency (FRA)

Abstract

n-3 高度不飽和脂肪酸(n-3HUFA)含量と DHA/EPA 比が異なる L 型ワムシをゾエア幼生に給餌し,メガロパには無強化のアルテミアを給餌して第 1 齢稚ガニまで飼育した。n-3HUFA 強化ワムシを給餌した場合,稚ガニまでの生残率と成長は改善されるとともに,メガロパから稚ガニへの脱皮異常率は低くなった。ワムシの脂肪酸含量および組成と生残率の関係から,ゾエア幼生に給餌するワムシ中の適正な n-3HUFA 含量は 2.3 g/100 g(乾燥重量基準),その含量での適正な DHA/EPA 比は 1.5 程度であると判断された。<br>

  The effects of varying levels of dietary n-3 highly unsaturated fatty acids (HUFA) and the ratios of docosahexaenoic acid/eicosapentaenoic acid (DHA/EPA) on survival, molting and growth of larval snow crab <i>Chionoecetes opilio</i> were examined in two separate experiments, in which larvae were reared in small containers until reaching the first stage crab. In experiment I, zoea larvae were fed rotifers enriched with n-3 HUFA at three levels, and rotifers without n-3 HUFA enrichment. In experiment II, zoea larvae were fed rotifers enriched with n-3 HUFA at a constant level, which was considered as optimum from experiment I, but having different DHA/EPA ratios, and fed non-enriched rotifers. In both experiments, megalopa larvae were fed non-enriched <i>Artemia</i> sp. Larval survival and growth were improved by feeding rotifers enriched with n-3 HUFA. The occurrence of abnormal moltings during the metamorphosis from megalopa to the first stage crab decreased with increasing n-3 HUFA content in rotifers. The better survival rates from the first zoea stage to the first crab stage were observed when zoeae were fed rotifers containing ∼2.3 g/100 g n-3 HUFA (dry matter basis) with the DHA/EPA ratio of ∼1.5.<br>

Journal

  • NIPPON SUISAN GAKKAISHI

    NIPPON SUISAN GAKKAISHI 75(6), 1004-1010, 2009-11-15

    The Japanese Society of Fisheries Science

References:  23

Cited by:  2

Codes

  • NII Article ID (NAID)
    10025443980
  • NII NACSIS-CAT ID (NCID)
    AN00193422
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    00215392
  • NDL Article ID
    10504306
  • NDL Source Classification
    ZR26(科学技術--農林水産--水産)
  • NDL Call No.
    Z18-345
  • Data Source
    CJP  CJPref  NDL  IR  J-STAGE 
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