The spatial distribution of colonial food provisioners
The spatial distribution of colonial food provisioners
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DOI：
10.1006/jtbi.1997.0530
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发表时间：
1998-01-21
影响因子：
2
通讯作者：
Edelstein-Keshet, L
中科院分区：
文献类型：
--
作者：
Dukas, R;Edelstein-Keshet, L
我们提出了空间显式模型来预测共享筑巢聚集的众多食物供应者的最佳分布。我们比较了单独供应者和社会供应者以及三种觅食货币的预测。当考虑具有相同食物参数的不同食物斑块时，较少的供应者使用更远的斑块。提供者人数下降的速度取决于所使用的货币。对于净能量摄入速率（随时间的净能量增益），在较宽的实际参数值和距离范围内，下降速率相对较小；考虑到效率（净能源收益超过能源成本）和经验得出的能源成本，下降的速度要高得多。对于终生适应度（在捕食风险下的终生食物传递），结果取决于飞行期间和在斑块上收集食物期间的死亡率风险比。在所有货币中，孤立供应者和社会供应者的最佳空间分布存在差异，离中心地点较远的社会供应者比例较大。在开花草甸等食物均匀分布的二维场域中，单生植物的最优分布是单生植物密度（单位面积数量）随距离单调下降，单生植物数量在最大使用面积的一半处达到峰值。(C) 1998学术出版社有限公司
We present spatially explicit models to predict the optimal distribution of numerous food provisioners that share a nesting aggregation. We compare predictions for solitary and social provisioners, and for three foraging currencies. When distinct food patches with identical food parameters are considered, fewer provisioners use the farther patches. The rate of decline in number of provisioners depends on the currency used. With net rate of energy intake (net energy gain over time), the rate of decline is relatively small under a wide range of realistic parameter values and distances; with efficiency (net energy gain over energy cost) and empirically derived energetic costs, the rate of decline is much higher. With lifetime fitness (lifetime food delivery under predation risk), outcomes depend on the ratio of mortality risk during flight and during food collection at the patch. With all currencies, there is a difference between the optimal spatial distribution of solitary and social provisioners, with a larger proportion of social provisioners being farther from the central place. The optimal distribution of solitary provisioners in a two dimensional field of uniformly distributed food such as a flowering meadow is such that the density of solitary provisioners (number per unit area) declines monotonically with distance, and provisioner number peaks at half the maximum area used. (C) 1998 Academic Press Limited.