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Comparison of solitary and collective foraging strategies of Caenorhabditis elegans in patchy food distributions.
Philosophical Transactions of the Royal Society B: Biological Sciences ( IF 6.3 ) Pub Date : 2020-07-27 , DOI: 10.1098/rstb.2019.0382
Siyu Serena Ding 1, 2 , Leah S Muhle 3, 4 , André E X Brown 1, 2 , Linus J Schumacher 3 , Robert G Endres 3
Affiliation  

Collective foraging has been shown to benefit organisms in environments where food is patchily distributed, but whether this is true in the case where organisms do not rely on long-range communications to coordinate their collective behaviour has been understudied. To address this question, we use the tractable laboratory model organism Caenorhabditis elegans, where a social strain (npr-1 mutant) and a solitary strain (N2) are available for direct comparison of foraging strategies. We first developed an on-lattice minimal model for comparing collective and solitary foraging strategies, finding that social agents benefit from feeding faster and more efficiently simply owing to group formation. Our laboratory foraging experiments with npr-1 and N2 worm populations, however, show an advantage for solitary N2 in all food distribution environments that we tested. We incorporated additional strain-specific behavioural parameters of npr-1 and N2 worms into our model and computationally identified N2's higher feeding rate to be the key factor underlying its advantage, without which it is possible to recapitulate the advantage of collective foraging in patchy environments. Our work highlights the theoretical advantage of collective foraging owing to group formation alone without long-range interactions and the valuable role of modelling to guide experiments.

This article is part of the theme issue ‘Multi-scale analysis and modelling of collective migration in biological systems'.



中文翻译:

线虫在斑驳食物分布中单独和集体觅食策略的比较。

集体觅食已被证明在食物分布不均的环境中有益于生物体,但在生物体不依赖远程通信来协调其集体行为的情况下这是否属实尚未得到充分研究。为了解决这个问题,我们使用易处理的实验室模型生物秀丽隐杆线虫,其中社会菌株(npr-1突变体)和孤立菌株(N2)可用于直接比较觅食策略。我们首先开发了一个用于比较集体和单独觅食策略的格上最小模型,发现社会代理仅由于群体形成而受益于更快、更有效的进食。我们的实验室用npr-1 进行觅食实验然而,N2 蠕虫种群在我们测试的所有食物分配环境中都显示出单独 N2 的优势。我们将npr-1和 N2 蠕虫的额外菌株特定行为参数纳入我们的模型,并通过计算确定 N2 的较高摄食率是其优势背后的关键因素,否则就可以概括在不完整环境中集体觅食的优势。我们的工作强调了集体觅食的理论优势,这是由于单独形成群体而没有远距离相互作用,以及建模指导实验的宝贵作用。

本文是主题问题“生物系统中集体迁移的多尺度分析和建模”的一部分。

更新日期:2020-07-27
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