Ecological pharmacodynamics: prey toxin evolution depends on the physiological characteristics of predators
Ecological pharmacodynamics: prey toxin evolution depends on the physiological characteristics of predators
复制标题
生态药效学:猎物毒素的进化取决于捕食者的生理特征
DOI:
10.1016/j.anbehav.2014.09.011
复制
发表时间:
2014
期刊:
影响因子:
2.5
通讯作者:
Speed M
中科院分区:
文献类型:
--
作者:
Speed M
The use of toxic chemical defences to repel and deter predators is widespread across living organisms, yet there are surprisingly few formal models of toxin evolution. Published models tend to focus on a trade-off between individual benefits and costs of toxicity, and treat predators as simple agents of selection, reducing future attacks when they encounter toxic prey. In this paper we argue, however, that the physiological characteristics of predators may be crucial in determining the nature and outcomes of toxin evolution. To examine this idea we devised and explored a model in which prey defence evolves in the context of predator physiology. We represented this as dose–effect relationships in predators for nutrition and toxins along with variable rates of predator metabolism. Incorporating variables of predator physiology can change views of toxin evolution. A key point is that inclusion of predator physiological variables requires that the nutritional value of prey is explicitly represented in the model, and this directly affects predictions for toxin evolution. In our model costly toxins generally evolve to the point that they are ‘minimally unprofitable’: just toxic enough to make prey typically unprofitable given their nutritional value to predators. As the nutritional value of prey increases, so the minimally unprofitable toxin level of prey tends to increase in step; hence another general prediction from this model is that toxin levels within prey should often correlate with the nutritional value of the prey. Predator physiology and cognition also contribute to variation in the social nature of defence. We argue that incorporating representations of predator physiology is important in the comprehension of toxin evolution and make suggestions for directions of future work.
登录
查看更多内容
影响因子:
--
作者:
M. Speed;G. Ruxton;J. Mappes;T. Sherratt
通讯作者:
T. Sherratt
影响因子:
1.8
作者:
B. L. Williams;C. Hanifin;E. D. Brodie;E. D. Brodie
通讯作者:
E. D. Brodie
影响因子:
2
作者:
T. Sherratt;M. Speed;G. Ruxton
通讯作者:
G. Ruxton
DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
D. Whitman;S. Vincent
通讯作者:
S. Vincent
DOI:
--
发表时间:
2009
期刊:
Frontiers in Bioscience
影响因子:
--
作者:
T. Sherratt;G. Roberts;R. Kassen
通讯作者:
R. Kassen