Effects of predictability and competition on group and individual choice in a free-ranging foraging environment.
Effects of predictability and competition on group and individual choice in a free-ranging foraging environment.
复制标题
可预测性和竞争对自由放养觅食环境中群体和个体选择的影响。
DOI：
10.1002/jeab.76
复制
发表时间：
2014
影响因子：
2.7
通讯作者：
Hackenberg,TimothyD
中科院分区：
文献类型：
--
作者：
Tan,Lavinia;Sosa,Frank;Talbot,Eric;Berg,Donald;Eversz,Dawniris;Hackenberg,TimothyD
本研究考察了大鼠在露天场所的群居觅食行为。食物的相对数量在两种食物来源或“斑块”之间有所不同。五种食物数量比例（1:1,1:2,1:8,8:1,2:1）在一系列30分钟的会话中呈现。在6分钟的时间段内（阶段1），比例随机变化，或者在不同的时间段内（阶段2）以一致的顺序变化。理想自由分布和广义匹配定律分别很好地描述了群体和个人偏好，在群体和个人层面上都存在不匹配的证据。个体和集体行为对食物相对数量的敏感性在第二阶段高于第一阶段。在实验之前和之后，通过从单个喂食器快速连续递送食物来评估竞争力排名，与第一阶段的敏感性值呈正相关，但在第二阶段则不那么一致。这项研究说明了一种很有前途的实验方法来研究社会背景下的觅食行为。
The present study examined the social foraging of rats in an open arena. The relative quantity of food varied across two food sources, or “patches.” Five food quantity ratios (1:1, 1:2, 1:8, 8:1, 2:1) were presented in a series of 30‐min sessions. Ratios varied randomly across 6‐min components within sessions (Phase 1), or in a consistent order across sessions (Phase 2). Group and individual preferences were well described by the ideal free distribution and the generalized matching law, respectively, with evidence of undermatching at both group and individual levels. Sensitivity of individual and collective behavior to the relative quantities of food was higher in Phase 2 than in Phase 1. Competitiveness rankings, assessed before and after experimental sessions by delivering food in rapid succession from a single feeder, was positively related to sensitivity values in Phase 1, but less consistently so in Phase 2. This study illustrates a promising experimental method for investigating foraging in a social context.