Calow P
Zoology Department, University of Glasgow, Glasgow.
Oecologia. 1975 Mar;20(1):33-49. doi: 10.1007/BF00364320.
Radiotracer and gravimetric techniques were used to investigate the effects of starvation, temperature, body size and food quality on both the ingestion rates and absorption efficiencies of A. fluviatilis (an algal grazer) and P. contortus (a detrivore which utilises the bacterial fraction of its food). In the face of food supply disturbance snails showed a considerable potential for adaptation. Both intestion rates and absorption efficiencies increased with starvation, and ingestion rate increased with reductions in food quality. Absorption efficiencies were independent of temperature and Q values for absorption rates suggested that snails showed some acclimation to temperature disturbance. Food absorption was linearly related to body surface area but absorption efficiencies were to a large extent independent of age and size.The above homeostases are discussed in terms of their contribution to fitness and also in terms of the possible underlying causal mechanisms. The implications of physiological homeostases for ecological efficiencies are also discussed.
放射性示踪技术和重量法被用于研究饥饿、温度、体型和食物质量对河生螺（一种藻类食草动物）和扭旋螺（一种利用食物中细菌部分的食腐动物）摄食率和吸收效率的影响。面对食物供应干扰，蜗牛表现出相当大的适应潜力。摄食率和吸收效率都随着饥饿程度的增加而提高，摄食率随着食物质量的下降而增加。吸收效率与温度无关，吸收速率的Q值表明蜗牛对温度干扰有一定的适应性。食物吸收与体表面积呈线性关系，但吸收效率在很大程度上与年龄和体型无关。上述稳态从它们对适应性的贡献以及可能的潜在因果机制方面进行了讨论。还讨论了生理稳态对生态效率的影响。
