Individual variation in functional response parameters is explained by body size but not by behavioural types in a poeciliid fish
Individual variation in functional response parameters is explained by body size but not by behavioural types in a poeciliid fish
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功能反应参数的个体差异可以通过体型来解释，但不能通过行为类型来解释。
DOI：
10.1007/s00442-016-3701-7
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发表时间：
2016
期刊：
影响因子：
2.7
通讯作者：
Arlinghaus R
中科院分区：
文献类型：
--
作者：
Schröder A;Kalinkat G;Arlinghaus R
功能反应是人均摄食率模型，其参数通常随个体体型缩放，但这些参数也可能进一步受到个体之间一贯不同的行为特征（即行为类型或动物个性）的影响。当一贯害羞、不活跃、容易受到压力的个体无法识别或应对无风险环境，或者由于与行为相关的较低代谢率而需要较少的食物时，行为类型可能从本质上导致较低的摄食率。为了测试功能反应参数的变化在多大程度上由身体大小和行为类型解释，我们分别估计了不同大小的雌性最小鳉鱼（Heterandria formosa）的攻击率和处理时间，并反复测量了每个个体的行为特征。我们发现每条鱼的攻击率和处理时间都有很大的不同。随着时间的推移，行为特征是稳定的，并且在个体之间沿着两个不同的人格轴持续变化。与我们的预期相反，功能反应的个体差异仅由身体大小来解释，而不是由现有的探索活动行为类型和应对方式来解释。虽然行为特征依赖的功能反应可能为理解行为类型的食物网水平后果提供了一条途径，但我们的研究迄今为止只是关于该主题的第二个研究。重要的是，我们的研究结果表明，与之前的研究相反，在没有外部生物压力源的情况下，行为类型不会影响个体的功能反应。
Functional responses areper-capitafeeding rate models whose parameters often scale with individual body size but the parameters may also be further influenced by behavioural traits consistently differing among individuals, i.e. behavioural types or animal personalities. Behavioural types may intrinsically lead to lower feeding rates when consistently shy, inactive and easily stressed individuals cannot identify or respond to risk-free environments or need less food due to lower metabolic rates linked to behaviour. To test how much variation in functional response parameters is explained by body size and how much by behavioural types, we estimated attack rate and handling time individually for differently sized female least killifish (Heterandria formosa) and repeatedly measured behavioural traits for each individual. We found that individual fish varied substantially in their attack rate and in their handling time. Behavioural traits were stable over time and varied consistently among individuals along two distinct personality axes. The individual variation in functional responses was explained solely by body size, and contrary to our expectations, not additionally by the existing behavioural types in exploration activity and coping style. While behavioural trait-dependent functional responses may offer a route to the understanding of the food web level consequences of behavioural types, our study is so far only the second one on this topic. Importantly, our results indicate in contrast to that previous study that behavioural types do notper seaffect individual functional responses assessed in the absence of external biotic stressors.
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功能反应的灵活组成部分。
影响因子：
4.8
作者：
T. Okuyama
通讯作者：
T. Okuyama
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DOI：
--
发表时间：
2015
期刊：
影响因子：
--
作者：
N. Pettorelli;Anne Hilborn;Clare Duncan;S. Durant
通讯作者：
S. Durant
影响因子：
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作者：
Killen, Shaun S.;Marras, Stefano;Domenici, Paolo
通讯作者：
Domenici, Paolo
影响因子：
2.3
作者：
Klefoth, Thomas;Skov, Christian;Arlinghaus, Robert
通讯作者：
Arlinghaus, Robert
捕食者-被捕食者模型中的个体行为差异
影响因子：
2
作者：
T. Okuyama
通讯作者：
T. Okuyama