The Adequate Use of Limited Information in Dispersal Decisions

The Adequate Use of Limited Information in Dispersal Decisions
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在驱散决策中充分利用有限信息

DOI:
10.1086/684190
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发表时间:
2016
期刊:
The American Naturalist
影响因子:
--
通讯作者:
T. Hovestadt
T. Hovestadt
中科院分区:
--
文献类型:
--
作者:
Poethke;A. Kubisch;O. Mitesser ;T. Hovestadt

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一些理论研究预测,知情(例如,密度相关)扩散通常会比不知情(随机)扩散产生更低的移民概率。在 2012 年的出版物中,Bocedi 等人。令人惊讶地得出相反的结论。对于大多数调查场景,他们发现,与遵循“完全知情”策略的分散者相比,不知情的分散者,特别是信息不太准确的分散者的分散倾向较低。此外,他们观察到,完全知情的个体进化出了一种阶梯式的扩散反应——这种对局部密度的反应与对非重叠世代生物体的理论预测相矛盾。复制 Bocedi 等人基于个体的模拟。我们发现这些结论是没有道理的,并且基于对模拟结果的误解:他们有争议的发现源于(i)对“人口密度”一词的误导性使用,(ii)对他们比较的不同决策标准的真实信息价值的误解,以及(iii)对分散反应演变的任意限制,阻碍了允许增强适应性利用现有信息的策略的演变。
Several theoretical studies predict that informed (e.g., density-dependent) dispersal should generally result in lower emigration probabilities than uninformed (random) dispersal. In a 2012 publication, Bocedi et al. surprisingly come to the opposite conclusion. For most scenarios investigated, they found that noninformed and, particularly, less precisely informed dispersers evolve lower dispersal propensity than dispersers following “fully informed” strategies. Further, they observed that fully informed individuals evolved a steplike dispersal response—a response to local density that contradicts theoretical predictions for organisms with nonoverlapping generations. Replicating the individual-based simulations of Bocedi et al. we find that these conclusions are not justified and are based on a misinterpretation of simulation results: their controversial findings result from (i) a misleading use of the term “population density,” (ii) a misconception concerning the true informative value of the different decision criteria they compared, and (iii) arbitrary constraints on the evolution of the dispersal response that prevented the evolution of strategies that allow for a fitness-enhancing utilization of available information.
DOI: 10.1098/rspb.2014.1226
发表时间: 2014
期刊: Proceedings of the Royal Society B: Biological Sciences
影响因子: --
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影响因子: 2
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