Uncertainty drives deviations in normative foraging decision strategies.
Uncertainty drives deviations in normative foraging decision strategies.
复制标题
DOI：
10.1098/rsif.2021.0337
复制
发表时间：
2021-07
期刊：
影响因子：
--
通讯作者：
El Hady A
中科院分区：
文献类型：
--
作者：
Kilpatrick ZP;Davidson JD;El Hady A
几乎所有的动物都通过有效的搜索和资源采集来获取生存所需的能量。补丁开发是一个典型的觅食行为，但有必要更易于处理和理解的数学模型描述觅食如何处理不确定性。为了提供这样的治疗，我们开发了一个规范的理论补丁觅食决策，提出觅食行为出现在面对不确定性的机制。我们的模型觅食统计和顺序推断补丁资源产量使用贝叶斯更新的基础上，他们的资源遭遇的历史。当补丁类型的确定性或补丁的估计产量福尔斯低于阈值时，触发离开补丁的决定。时间尺度上，资源的不确定性持续强烈影响行为变量，如补丁停留时间和决策规则，确定补丁离开。当补丁耗尽是缓慢的，在栖息地的选择，偏离的特点是减少不确定性，这表明觅食居住在一个低产量的补丁。不确定性导致补丁开发觅食过度收获（收获不足）补丁与最初的低（高）资源产量相比，边际价值定理的预测。这些结果扩展了最优觅食理论，并激发了各种行为实验研究补丁觅食行为。
Nearly all animals forage to acquire energy for survival through efficient search and resource harvesting. Patch exploitation is a canonical foraging behaviour, but there is a need for more tractable and understandable mathematical models describing how foragers deal with uncertainty. To provide such a treatment, we develop a normative theory of patch foraging decisions, proposing mechanisms by which foraging behaviours emerge in the face of uncertainty. Our model foragers statistically and sequentially infer patch resource yields using Bayesian updating based on their resource encounter history. A decision to leave a patch is triggered when the certainty of the patch type or the estimated yield of the patch falls below a threshold. The time scale over which uncertainty in resource availability persists strongly impacts behavioural variables like patch residence times and decision rules determining patch departures. When patch depletion is slow, as in habitat selection, departures are characterized by a reduction of uncertainty, suggesting that the forager resides in a low-yielding patch. Uncertainty leads patch-exploiting foragers to overharvest (underharvest) patches with initially low (high) resource yields in comparison with predictions of the marginal value theorem. These results extend optimal foraging theory and motivate a variety of behavioural experiments investigating patch foraging behaviour.
登录
查看更多内容
影响因子：
1.4
作者：
GREEN, RF
通讯作者：
GREEN, RF
影响因子：
2.9
作者：
CLARK, CW;MANGEL, M
通讯作者：
MANGEL, M
影响因子：
5.3
作者：
Cisek, Paul;Puskas, Genevieve Aude;El-Murr, Stephany
通讯作者：
El-Murr, Stephany
影响因子：
4.3
作者：
Davidson, Jacob D.;El Hady, Ahmed
通讯作者：
El Hady, Ahmed
影响因子：
2.5
作者：
ALONSO, JC;ALONSO, JA;MUNOZPULIDO, R
通讯作者：
MUNOZPULIDO, R