Grasp of Feeding Character of Aplysia dactylomela Rang to Restore of Eisenia arborea Areschoung Marine Forest

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  • KAMOHARA Satoru
    Aichi Fisheries Research Institute
  • HARADA Yasuko
    Marine Resources Research Center, Aichi Fisheries Research Institute
  • HATTORI Katsuya
    Marine Resources Research Center, Aichi Fisheries Research Institute:(Present office)Mikawa Ichinomiya Station, Freshwater Resources Research Center, Aichi Fisheries Research Institute
  • SUZUKI Teruaki
    Aichi Fisheries Research Institute

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Other Title
  • サガラメ群落の修復を目的としたアメフラシ摂食特性の把握
  • サガラメ グンラク ノ シュウフク オ モクテキ ト シタ アメフラシ セッショク トクセイ ノ ハアク

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Abstract

Aplysia dactylomela feed on the young of Eisenia arborea, whose population increases in the spring season. Therefore, the author investigated the selection and amount of young E. arborea and different seaweeds consumed by A. dactylomela. A. dactylomela liked, in order, Ulva pertusa, Undaria pinnatifida, E. arborea, and Gelidium amansii. The amount of food consumed by 100g of A. dactylomela was 10.3w.w.g inv^<-1>・d^<-1>. (Ulva pertusa), 2.7w.w.g inv^<-1>・d^<-1> (Undaria pinnatifida), 0.7w.w.g inv^<-1>・d^<-1> (E. arborea), and 0.1w.w.g inv^<-1>・d^<-1> (G. amansii) at 15℃, and 3.7w.w.g inv^<-1>・d^<-1> (Ulva pertusa), 1.5w.w.g inv^<-1>・d^<-1> (Undaria pinnatifida), 0.8w.w.g inv^<-1>・d^<-1> (E. arborea), and 0.2w.w.g inv^<-1>・d^<-1>. (G. amansii) at 18℃. The amount of Ulva pertusa and Undaria pinnatifida consumed decreased with an increase in water temperature, but that of E. arborea and G. amansii increased. The author believes that young E. arborea were influenced by surrounding vegetation, the density of A. dactylomela, and the selection and amount of food consumed by A. dactylomela, and thought the measure.

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