アメリカカブトエビの摂食と遊泳に関わる機能形態

概要

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In the tadpole shrimp Triops longicaudtus, the morphology of the trunk limbs, which are used for feeding and swimming, was observed, and their detailed movement was analyzed using a high-speed camera. While swimming, the 5th and posterior anterior trunk limbs push water backward, propelling the animal forward. While feeding, the 1st to 4th anterior trunk limbs seek food just in front of and under the body by stirring sediment. Large food particles are soon placed in the food groove by the endites of the anterior trunk limbs, whilst small particles are carried by the current induced by the posterior trunk limbs and converge at the end of the food groove at the base of the 11th trunk limbs. The 5th and posterior anterior trunk limbs form a ‘food-trap funnel,’ narrowing backward converge at the base of the 11th trunk limbs, and this structure guides the foodcarrying stream into the posterior end of the food groove. The concentrated food particles are subsequently moved forward in the food groove to the backward opening mouth.
2010-06-30