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|Title:||Population characteristics of a kleptoparasitic spider Argyrodes flavescens (Araenae: Theridiidae) and its impact on a host spider Nephila pilipes (Araneae: Tetragnathidae) from Singapore||Authors:||Koh, T.H.
|Issue Date:||30-Jun-2002||Citation:||Koh, T.H.,Li, D. (2002-06-30). Population characteristics of a kleptoparasitic spider Argyrodes flavescens (Araenae: Theridiidae) and its impact on a host spider Nephila pilipes (Araneae: Tetragnathidae) from Singapore. Raffles Bulletin of Zoology 50 (1) : 153-160. ScholarBank@NUS Repository.||Abstract:||Argyrodes flavescens is a common theridiid spider species foraging in the web of a host spider Nephila pilipes in Singapore. In the present study, we investigated the factors that influence the relationship between kleptoparasites and host spiders and the impact of kleptoparasites on hosts. Field surveys were conducted to examine how host size, web size, and ambient light intensity around webs affect the abundance of A. flavescens. The results from the field study showed that the mean number of A. flavescens is positively correlated with body size and web size of host spiders, and ambient light intensity surrounding the webs. Laboratory experiments were carried out to examine the impact of A. flavescens on N. pilipes by manipulating the number of A. flavescens present on the webs. The experimental results demonstrated that A. flavescens reduces host weight gain, increases mortality of host spiders, rate of web relocation, and web damage. These findings suggest that A. flavescens is detrimental to host spiders, N. pilipes, by stealing freshly captured prey items from the host, forcing the hosts to relocate the webs more frequently, sharing the large prey item with the host, and removing large quantity of silk from the host web.||Source Title:||Raffles Bulletin of Zoology||URI:||http://scholarbank.nus.edu.sg/handle/10635/101430||ISSN:||02172445|
|Appears in Collections:||Staff Publications|
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