アユ仔魚の発育に伴なう比重の変化 Ontogenetic Change in Specific Gravity in the Early Stages of the Ayu Plecoglossus altivelis

この論文にアクセスする

この論文をさがす

著者

抄録

The specific gravities of the ayu <i>Plecoglossus altivelis</i> larvae were measured in a series of saline solutions. The volume of swim bladder and wet and dry fish weight were also measured.<br>After decresasing from 1.038 to 1.032 through the prelarval period, the specific gravity of postlarvae with uninflated swim bladder increased to 1.050. The larvae began to inflate their swim bladder while 15 to 20mm <i>TL</i> during the nighttime and 21 to 35mm <i>TL</i> during the daytime. With inflation of the swim bladder, the specific gravity decreased remarkably and its diel change became to be marked, by day-increase and night-decrease. Buoyancy regulation was effected by the change of the swim bladder volume, which was induced by a photocycle, <i>viz</i>. light-deflation and dark-infla-tion. The gas in the swim bladder originated from the air swallowed at the water surface.<br>These results suggest that ayu larvae display diel vertical migration, <i>viz</i>. dusk-upward and dawn-downward, similar to several physostomous species such as anchovy and herring.

収録刊行物

  • 日本水産学会誌  

    日本水産学会誌 64(5), 822-829, 1998-09-15 

    日本水産學會

参考文献:  17件

参考文献を見るにはログインが必要です。ユーザIDをお持ちでない方は新規登録してください。

被引用文献:  7件

被引用文献を見るにはログインが必要です。ユーザIDをお持ちでない方は新規登録してください。

各種コード

  • NII論文ID(NAID)
    10004854257
  • NII書誌ID(NCID)
    AN00193422
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    00215392
  • NDL 記事登録ID
    4572528
  • NDL 雑誌分類
    ZR26(科学技術--農林水産--水産)
  • NDL 請求記号
    Z18-345
  • データ提供元
    CJP書誌  CJP引用  NDL  IR  J-STAGE 
ページトップへ