植食性小型巻貝によるホソメコンブの摂食に及ぼす水温の影響

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タイトル別名
  • Effect of Grazing by Small Herbivorous Gastropods on the Kelp Laminaria religiosa at Different Water Temperatures
  • ショクショクセイ コガタ マキガイ ニ ヨル ホソメコンブ ノ セッショク ニ オヨボス スイオン ノ エイキョウ

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We made two laboratory experiments with small herbivorous gastropods Omphalius rusticus rusticus and Chlorostoma lischkei that frequently live in the habitats of the kelp Laminaria religiosa in southwest Hokkaido, Japan, to examine the effect of their grazing on L. religiosa at different water temperatures. In an experiment to find if O. rusticus rusticus feeds on a sheet of kelp gametophytes settled on styrene chambers or on glass slides at 5°C, 10°C and 15°C, O. rusticus rusticus fed on the kelp gametophytes even at the lowest water temperature, but food consumption increased as the water temperature increased. In an experiment to find if the two gastropod species feed on juvenile kelp sporophytes at 10°C and 15°C, many individuals of C. lischkei actively fed on juvenile kelp sporophytes at both water temperatures, but most individuals of O. rusticus rusticus showed no preference regardless of water temperature. Our results suggest that the potential impact of gastropod grazing on L. religiosa might differ between these gastropod species and water temperatures.

収録刊行物

  • 水産増殖

    水産増殖 54 (3), 375-381, 2006

    日本水産増殖学会

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