A color-mediated mutualism between two arthropod predators

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Title:	A color-mediated mutualism between two arthropod predators
Authors:	Peng, P.;Blamires, S.J.;Agnarsson, I.;Lin, H.-C.;Tso, I.-M.
Contributors:	Department of Life Science, Tunghai University
Date:	2013
Issue Date:	2014-05-30T02:11:22Z (UTC)
Abstract:	The nature of interactions between animals varies depending on local selection pressure, trophic status of the participants, and evolutionary circumstances [1-6]. Body coloration and other visual signals may also affect animal interactions [7, 8]. Game theory posits that if one species provides a "service" in exchange for a "goods," a mutualism may ensue [9]. Mutualisms between two predators are rare because of multiple conflicts of interests [3, 10] (but see [11, 12]). We used a nocturnal system traditionally considered kleptoparasitic [12] to determine whether a mutualism ensues because the body coloration of the kleptoparasite is beneficial to the host. Specifically, we tested whether the silver body of the spider Argyrodes fissifrons (Theridiidae) attracts prey for the larger, duller spider Cyrtophora unicolor (Araneidae), which reciprocates by allowing A. fissifrons access to its web. When A. fissifrons were removed from C. unicolor webs, the webs intercepted fewer prey. Furthermore, covering the silver body parts of A. fissifrons also resulted in a reduction in prey interception by C. unicolor webs. We thus show that a mutualism between two arthropod predators can be mediated by the coloration of one species enhancing the foraging gains of another. ? 2013 Elsevier Ltd All rights reserved.
Relation:	Current Biology,Vol.23,Issue2,P.172-176
Appears in Collections:	[生命科學系所] 期刊論文

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