Silk feeding as an alternative foraging tactic in a kleptoparasitic spider under seasonally changing environments
Silk feeding as an alternative foraging tactic in a kleptoparasitic spider under seasonally changing environments
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在季节性变化的环境下，喂丝作为盗贼寄生蜘蛛的替代觅食策略
DOI：
10.1017/s0952836903004540
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发表时间：
2004
影响因子：
2
通讯作者：
Aya Shimazaki
中科院分区：
文献类型：
--
作者：
T. Miyashita;Y. Maezono;Aya Shimazaki
银蛛属蜘蛛是一种偷食寄生虫，它们会从其他蜘蛛那里偷取猎物。最近的研究表明，除了偷窃猎物外，它们偶尔还会吃宿主蜘蛛网的丝。Argyrodes如何改变这两种觅食策略仍然是未知的。觅食行为的Argyrodes flavescens观察在日本的西南部，猎物的可用性随季节变化很大。食丝行为是常见的昆虫猎物时，主机网络上的可用性低，但当猎物丰富，只有猎物偷窃行为观察。当猎物稀少时，蜘蛛花更多的时间吃蛛丝而不是猎物。此外，在大多数个体以丝为食的季节，只有一小部分个体消耗猎物。这些结果表明，丝绸吃是一个重要的替代觅食策略下，季节性变化的环境。
Spiders of the genus Argyrodes are kleptoparasites that steal prey from other web spiders. Recent studies have shown that in addition to stealing prey, they occasionally eat the silk of the host spider webs. How Argyrodes alters the two foraging tactics in the field is still unknown. The foraging behaviour of Argyrodes flavescens was observed in the south-western part of Japan where prey availability changes greatly with season. Silk-eating behaviour was commonly observed when insect prey availability on host webs was low, but when prey was abundant, only prey-stealing behaviour was observed. Spiders spent more time feeding on silk than on prey when prey was scarce. Moreover, in the season when most individuals fed on silk, only a small portion of individuals consumed prey. These results suggest that silk eating is an important alternative foraging tactic under seasonally changing environments.