Feeding habits of juvenile <i>Siganus fuscescens</i> in a subtropical seagrass meadow estimated by rearing experiments and dual stable isotope analysis

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  • Yamada Hideaki
    Seikai National Fisheries Research Institute, Japan Fisheries Research and Education Agency
  • Kon Koetsu
    Shimoda Marine Research Center, University of Tsukuba
  • Nakamoto Kenta
    International Coastal Research Center, Atmosphere and Ocean Research Institute, The University of Tokyo
  • Hayakawa Jun
    International Coastal Research Center, Atmosphere and Ocean Research Institute, The University of Tokyo
  • Nanjo Kusuto
    National Fisheries University, Japan Fisheries Research and Education Agency
  • Kawamura Tomohiko
    International Coastal Research Center, Atmosphere and Ocean Research Institute, The University of Tokyo

Bibliographic Information

Other Title
  • 給餌実験と炭素・窒素安定同位体比分析から推定した亜熱帯海草藻場におけるアイゴ稚魚の摂食生態
  • キュウジ ジッケン ト タンソ ・ チッソ アンテイ ドウイタイヒ ブンセキ カラ スイテイ シタ アネッタイ カイソウ モバ ニ オケル アイゴ チギョ ノ セッショク セイタイ

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Abstract

Rearing experiments were conducted using newly settled rabbitfish collected in subtropical seagrass meadows. Mean standard length on day 92 in the treatment fed on krill and seagrass (Thalassia hemprichii) was significantly larger than those of rabbitfish fed on only krill. The mixing models demonstrated that contribution rates of seagrass in the treatment fed on krill and seagrass was 0.7-15% (95% confidence interval). Contribution rates of seagrass for wild rabbitfish were equivalent to those of reared fish. These results suggest that the contribution of seagrass as an energy source is relatively small for juvenile rabbitfish in subtropical seagrass meadows.

Journal

  • Aquaculture Science

    Aquaculture Science 68 (2), 163-167, 2020

    Japanese Society for Aquaculture Science

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