Flexible reprogramming of Pristionchus pacificus motivation for attacking Caenorhabditis elegans in predator-prey competition.
Flexible reprogramming of Pristionchus pacificus motivation for attacking Caenorhabditis elegans in predator-prey competition.
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DOI：
10.1016/j.cub.2022.02.033
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发表时间：
2022-04-25
期刊：
影响因子：
9.2
通讯作者：
Chalasani, Sreekanth H.
中科院分区：
文献类型：
--
作者：
Quach, Kathleen T.;Chalasani, Sreekanth H.
具有不同饮食的动物必须使它们的食物优先级适应各种各样的环境条件。这种饮食优化问题对于与猎物竞争食物的捕食者来说尤其复杂。虽然捕食者-猎物竞争是普遍的，在生态学上是至关重要的，但仍然很难区分攻击竞争猎物的捕食动机和竞争动机。在这里，我们剖析了杂食性线虫太平洋棱纹线虫的觅食决定，揭示其看似失败的掠夺性尝试对秀丽隐杆线虫实际上是有效的领土侵略的动机行为。而太平洋拟单胞菌则容易杀死和吞食C.一口咬一口的秀丽隐杆线虫，成年C.秀丽线虫通常能存活并逃脱叮咬。然而，非致命的叮咬可以通过减少成年C的访问来提供竞争优势。线虫及其后代与太平洋原螯虾也吃的细菌食物的关系。我们表明，成本和收益的掠夺性和领土的结果影响如何P.太平洋决定的食物目标，猎物或细菌，应该引导其动机咬。这些掠夺和领土的动机强加了不同的规则来调整咬的意愿，以应对细菌丰度的变化。除了咬，捕食和领土的动机也影响的搜索策略使用，以增加与C。优雅当用章鱼胺受体拮抗剂处理时，太平洋拟步行虫的咬和搜索动机从领土性转变为捕食性。总体而言，我们证明，P. pacificus评估攻击C.它灵活地重新规划觅食策略，优先考虑猎物或细菌食物。Quach和Chalasani表明，杂食性捕食者可以在捕食和领土觅食策略之间切换，以咬竞争的猎物。觅食决策平衡的成本和收益的替代结果攻击猎物在特定的资源背景下。章鱼胺信号介导的领土到捕食觅食的开关。
Animals with diverse diets must adapt their food priorities to a wide variety of environmental conditions. This diet optimization problem is especially complex for predators that compete with prey for food. Although predator-prey competition is widespread and ecologically critical, it remains difficult to disentangle predatory and competitive motivations for attacking competing prey. Here, we dissect the foraging decisions of the omnivorous nematode Pristionchus pacificus to reveal that its seemingly failed predatory attempts against Caenorhabditis elegans are actually motivated acts of efficacious territorial aggression. While P. pacificus easily kills and eats larval C. elegans with a single bite, adult C. elegans typically survives and escapes bites. However, non-fatal biting can provide competitive benefits by reducing access of adult C. elegans and its progeny to bacterial food that P. pacificus also eats. We show that the costs and benefits of both predatory and territorial outcomes influence how P. pacificus decides which food goal, prey or bacteria, should guide its motivation for biting. These predatory and territorial motivations impose different sets of rules for adjusting willingness to bite in response to changes in bacterial abundance. In addition to biting, predatory and territorial motivations also influence which search tactic P. pacificus uses to increase encounters with C. elegans. When treated with an octopamine receptor antagonist, P. pacificus switches from territorial to predatory motivation for both biting and search. Overall, we demonstrate that P. pacificus assesses alternate outcomes of attacking C. elegans and flexibly reprograms its foraging strategy to prioritize either prey or bacterial food. Quach and Chalasani show that an omnivorous predator can switch between predatory and territorial foraging strategies for biting competing prey. Foraging decisions balance the costs and benefits of alternate outcomes of attacking prey in a specific resource context. Octopamine signaling mediates the switch from territorial to predatory foraging.
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影响因子：
64.5
作者：
BARGMANN, CI;HARTWIEG, E;HORVITZ, HR
通讯作者：
HORVITZ, HR
影响因子：
3.4
作者：
Click A;Savaliya CH;Kienle S;Herrmann M;Pires-daSilva A
通讯作者：
Pires-daSilva A
影响因子：
3.3
作者：
Gomez-Amaro RL;Valentine ER;Carretero M;LeBoeuf SE;Rangaraju S;Broaddus CD;Solis GM;Williamson JR;Petrascheck M
通讯作者：
Petrascheck M
DOI：
10.1073/pnas.0409009101
发表时间：
2005-03-01
影响因子：
11.1
作者：
Gray, JM;Hill, JJ;Bargmann, CI
通讯作者：
Bargmann, CI
影响因子：
2.7
作者：
CASSADA, RC;RUSSELL, RL
通讯作者：
RUSSELL, RL