Bayne B L, Klumpp D W, Clarke K R
NERC Institute for Marine Environmental Research, Prospect Place, PL1 3DH, Plymouth, England.
Department of Zoology, University of Cape Town, Rondebosch, 7700, South Africa.
Oecologia. 1984 Sep;64(1):26-33. doi: 10.1007/BF00377539.
Individuals of three mytilid species (Choromytilus meridionalis; Perna perna; Aulacomya ater) from two sites characterised by different qualities of ration available to these suspension feeders showed different rates in some components of the physiological energy budget. These differences included higher feeding (=clearance) and respiration rates, but lower absorption efficiencies, in individuals from the site with the higher quality ration. A novel technique was employed to estimate the residence time of food particles in the digestive gland. Individuals showing higher feeding rates had shorter residence times than those feeding more slowly and a significant positive correlation was demonstrated between residence time and absorption efficiency. These relationships, together with an exponential increase in rates of respiratory heat loss with an increase in ingested ration, are suggested to provide these animals with a physiological flexibility to compensate for reduced food quality in a way consistent with some theoretical predictions. Such compensations are made more effective if the total gut capacity can also change in response to the quality of the ration.
来自两个地点的三种贻贝（南方肌蛤；翡翠贻贝；黑紫贻贝）个体，这两个地点为这些滤食性动物提供的食物质量不同，它们在生理能量预算的某些组成部分表现出不同的速率。这些差异包括，来自食物质量较高地点的个体具有更高的摄食（=清除）和呼吸速率，但吸收效率较低。采用了一种新技术来估计食物颗粒在消化腺中的停留时间。摄食速率较高的个体比摄食较慢的个体停留时间更短，并且停留时间与吸收效率之间存在显著的正相关。这些关系，以及随着摄入食物量增加呼吸热损失速率呈指数增加，表明这些动物具有生理灵活性，能够以与一些理论预测一致的方式补偿食物质量下降的情况。如果总肠道容量也能根据食物质量的变化而改变，这种补偿会更有效。
