The benefits of stealing from a predator: foraging rates, predation risk, and intraspecific aggression in the kleptoparasitic spider Argyrodes antipodiana
The benefits of stealing from a predator: foraging rates, predation risk, and intraspecific aggression in the kleptoparasitic spider Argyrodes antipodiana
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从捕食者那里偷窃的好处：盗贼寄生蜘蛛 Argyrodes antipodiana 的觅食率、捕食风险和种内攻击行为
DOI：
10.1093/beheco/8.6.665
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发表时间：
1997
影响因子：
2.4
通讯作者：
M. Whitehouse
中科院分区：
文献类型：
--
作者：
M. Whitehouse
在食品与安全之间的权衡中，积极的种内相互作用的作用尚未得到广泛研究。在这里，我使用盗窃寄生蜘蛛 Argyrodts antipodiana 及其宿主蜘蛛和潜在捕食者 Eriophora pustulosa 来介绍该系统的信息。 A. antipodiana 可以在潜在危险的地点（寄主网与寄主的中心）或相对安全的地点（寄主网边缘的食物束）进食。我发现A. antipodiana 在与宿主一起进食时可以非常快速地获取食物，显然是通过利用宿主消化猎物的能力。因此，A, antipodiana 遵循基于觅食模型的预测，因为它因较高的食物回报而在中心接受较高的捕食风险。 A. antipodiana 还积极竞争以获得更多食物。然而，激烈的竞争增加了宿主的捕食风险，特别是在宿主非常接近的中心。因此，A. antipodiana 根据其在网络上的位置修改其种内攻击性水平：在中心，攻击成本很高（由于捕食风险），A. antipodiana 降低了其攻击性，但在竞争食物束时，它在远离中心的地方具有攻击性。 A, antipodiana 能够根据其在网络上的位置来改变相互作用强度，使其能够利用丰富但有风险的食物来源，并为根据种内食物竞争检查食物和安全权衡提供新的角度。 Kty 词：Argyrodes antipodiana、觅食、种内攻击、盗窃寄生虫、捕食蜘蛛、权衡。 [Behav Ecol 8:663-667 (1997)] 最近的工作强调了捕食的重要性。在
In the trade-off between food and safety, the role of aggressive intraspecific interactions has not been extensively examined. Here I present information on this system using a kleptoparasitic spider, Argyrodts antipodiana, and its host spider and potential predator, Eriophora pustulosa. A. antipodiana can feed either at a potentially dangerous site (the hub of its host's web with the host), or at a relatively safe site (on food bundles around the edge of the host's web). I found that A. antipodiana can gain food very quickly when feeding with the host, apparently by exploiting the host's ability to digest the prey. Thus A, antipodiana follows predictions based on foraging models in that it accepts a higher predation risk at the hub because of the higher food payoff. A. antipodiana also aggressively competes for access to more food. However, aggressive competition increases the pre- dation risk from the host, especially at the hub where the host is very close. Consequently, A. antipodiana modifies its level of intraspecific aggressiveness in accordance with its position on the web: at the hub,where the cost of aggression is high (due to predation risk), A. antipodiana reduces its aggressiveness, but it is aggressive away from the hub when competing for food bundles. The ability of A, antipodiana to change interaction intensity as a function of its position on the web enables it to exploit a rich, but risky, food source and provides a new angle for examining food and safety trade offs in light of intraspecific competition for food. Kty words: Argyrodes antipodiana, foraging, intraspecific aggression, kleptoparasite, predation spider, trade-offs. [Behav Ecol 8:663-667 (1997)] ecent work has highlighted the importance of predation . in the