钟形幼虫的纤毛筛打破了生物学推理规则。

CYPHONAUTES' CILIARY SIEVE BREAKS A BIOLOGICAL RULE OF INFERENCE.

作者信息

Strathmann Richard R, McEdward Larry R

出版信息

Biol Bull. 1986 Dec;171(3):694-700. doi: 10.2307/1541634.

Abstract

Biologists routinely assume that a mechanism demonstrated in one organism will be found in others in which form, function, ancestry, and physical parameters are similar. These criteria failed to predict the feeding mechanism of the cyphonautes larva of bryozoans. Larval and adult bryozoans feed with cilia similar in size and distribution, with similar current velocities, and similar Reynolds numbers. Nevertheless, the larvae filter particles with a sieve of stationary cilia whereas the adults respond to individual particles with an induced local reversal of ciliary beat and concentrate particles without filtration. The larva's ciliary sieve is doubly unexpected because it requires a ciliary stiffness at the maximum recorded for cilia.

摘要

生物学家通常认为，在一种生物中得到证实的机制，在其他形态、功能、祖先和物理参数相似的生物中也会被发现。这些标准未能预测苔藓虫类苔藓虫幼虫的摄食机制。幼虫和成年苔藓虫通过大小和分布相似、流速相似且雷诺数相似的纤毛进食。然而，幼虫用固定纤毛的筛子过滤颗粒，而成年苔藓虫则通过诱导纤毛摆动的局部反向来对单个颗粒做出反应，并且在不进行过滤的情况下聚集颗粒。幼虫的纤毛筛格外出人意料，因为它需要的纤毛硬度是有记录以来纤毛的最大值。