Web decorations and alternative foraging tactics of the spider Argiope appensa
Web decorations and alternative foraging tactics of the spider Argiope appensa
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DOI：
10.1080/08927014.1998.9522870
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发表时间：
1998
影响因子：
1.2
通讯作者：
M. Hauber
中科院分区：
文献类型：
--
作者：
M. Hauber
金蛛属的蜘蛛经常用非常明显的丝结构来装饰它们的网。为了研究这些奇怪的装饰物在附件金蛛觅食行为中的可能功能，对马里亚纳群岛关岛的几个自由放养种群进行了研究。装饰网的平均面积是一致的，并显着小于未装饰网的平均面积。装饰的网也遭受了显着更多的损害，每单位面积比未装饰的网和装饰的上网象限往往表现出更多的损害模式比未装饰的象限。然而，对个体觅食成功率的估计显示，装饰和非装饰蜘蛛之间没有显着差异。这些数据表明A. appensa采取了一种混合觅食战略，有两种备选战术。结较小的装饰网的蜘蛛与结较大的未装饰网的蜘蛛在觅食上取得了相似的成功。
Spiders in the genus Argiope frequently decorate their webs with highly visible silk structures. To investigate the possible function of these curious decorations in the foraging behavior of Argiope appensa, several free-ranging populations were studied on Guam, Mariana Islands. The mean area of decorated webs was consistently and significantly smaller than the mean area of undecorated webs. Decorated webs also suffered significantly more damage per unit area than undecorated webs and decorated upper web quadrants tended to exhibit more damage patterns than undecorated quadrants. Estimates of individual foraging success, however, showed no significant difference between decorating and non-decorating spiders. These data suggest that A. appensa is engaged in a mixed foraging strategy with two alternative tactics. Spiders which spin smaller, decorated webs achieve similar foraging success to those which spin larger, undecorated webs.