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昆士兰食蛛结网恐蛛的猎物偏好(蜘蛛目:跳蛛科)

已有 2347 次阅读 2020-5-7 21:06 |个人分类:文献摘要|系统分类:科研笔记| 恐蛛, 猎物, 选择偏好

昆士兰食蛛结网恐蛛的猎物偏好(蜘蛛目:跳蛛科)


Li, D. and R. R. Jackson (1996). Prey preferences of Portia fimbriata, an araneophagic, web-building jumping spider (Araneae: Salticidae) from Queensland. Journal of insect behavior 9(4): 613-642.

 

Portia fimbriata from Queensland, a previously studied jumping spider (Salticidae), routinely includes web-building spiders and cursorial salticids in its diet, both of these types of prey being dangerous and unusual prey for a salticid. The present paper is the first detailed study of P. fimbriata's prey preferences. Three basic types of tests of prey preference were used, providing evidence that (1) P. fimbriata males and females prefer spiders (both web-building spiders in webs and salticids away from webs) to insects; (2) P. fimbriata males and females prefer salticids to web-building spiders; (3) P. fimbriata males and females prefer larger spiders to smaller spiders; (4) there are intersexual differences in the preferences of P. fimbriata for prey size, females preferring larger prey and males preferring smaller prey; and (5) P. fimbriata's prey preferences are not affected by a prior period without food of 2 weeks. When preferences were tested for by using both living, active prey and dead, motionless lures, the same preferences were expressed, indicating that P. fimbriata can distinguish among different types of prey independent of the different movement patterns of different prey.

 

昆士兰食蛛结网跳蛛Portia fimbriata的猎物偏好(蜘蛛目:Saitiidae)

来自昆士兰的Portia fimbriata是一种以前被研究过的跳蛛(Salticidae),通常在它的食物中包括结网的蜘蛛和游猎的跳蛛,这两种类型的猎物对跳蛛来说都是危险和不寻常的猎物。本论文是第一个详细的研究P. fimbriata的猎物偏好。采用了三种基本类型的猎物偏好测试,提供了以下证据:(1)与昆虫相比,雄性和雌性P. fimbriata对蜘蛛(包括在网中结网的蜘蛛和不结网的跳蛛)更喜欢;(2)与结网蜘蛛相比,雄性和雌性P. fimbriata更喜欢(捕食)跳蛛;(3)与小蜘蛛相比,雄蜘蛛和雌蜘蛛更喜欢捕食大蜘蛛;(4)雌雄间性差异表现在对猎物大小的偏好上,雌蛛偏好较大的猎物,雄蛛偏好较小的猎物;(5)前一段2周不进食的时间不会影响Portia fimbriata的捕食偏好。当同时使用活的、活动的和死的、无动作的诱饵来测试偏好时,相同的偏好表达了出来,这表明Portia fimbriata可以独立于不同猎物的不同移动模式来区分不同类型的猎物。




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