Grazing on the Crustose Coralline Alga Lithophyllum yessoense by the Sea Urchin Styongylocentrotus nudus and the Limpet Acmaea pallida
エゾイシゴロモ(殻状無節サンゴモの1種)に対するキタムラサキウニ及びユキノカサガイの摂食

DAISUKE FUJITA
1992 Benthos research  
Lithophyllum yessoense, a dominant crustose coralline alga on lsoyake (urchin-dominated barren) ground in southwestern Hokkaido, was experimentally fed to the sea urchin Strongylocentrotus nudus (3cm in test diameter) and the limpet Acmaea pallida (2cm in shell length) in the laboratory. Grazing marks of the urchin were composed of pentagonally-arranged five strips, and scattered on the crust surface. The wound was 0.01mm deep within sacrificial epithallium, and crust surface of 0.20mm2 was
more » ... ved by one biting. The limpet grazed more densely and deeply (0.04mm) enough to remove distal columnar cells as well as epithallial cells. Crust surface of 0.43mm2 was removed by one biting. The urchin-grazing marks (shallow wounds) became vague by the usual production of
doi:10.5179/benthos1990.1992.42_49 fatcat:maic3jumdvee3o2u52cwlneqla