Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/12957
Title: UV vision in jumping spiders (Araneae: Salticidae): Sexual selection and foraging behaviour
Authors: LIM LEK MIN, MATTHEW
Keywords: Animal communication, Foraging behaviour, Jumping spiders, Sexual selection, Ultraviolet reflectance, Ultraviolet vision
Issue Date: 5-Feb-2007
Source: LIM LEK MIN, MATTHEW (2007-02-05). UV vision in jumping spiders (Araneae: Salticidae): Sexual selection and foraging behaviour. ScholarBank@NUS Repository.
Abstract: Animals use UV (<400 nm) vision for foraging, navigation, and sexual signaling. Although many invertebrates possess UV-sensitive photoreceptors, the evolutionary significance of invertebrate UV vision remains poorly understood. Jumping spiders are highly ornate invertebrates with acute, colour vision (300-700 nm); however the importance of salticid UV vision and UV reflectance is unexplored. Here I investigated the functional significance of salticid UV vision in sexual selection and foraging. Several salticid species reflected UV, with Cosmophasis umbratica exhibiting extreme sexual UV dichromatism: only adult males reflected UV. Age and feeding history affected the structure-based UV ornaments of this spider. Male-male contests revealed correlations between losing rivalsa?? contest persistence and reflectance spectral traits; mate assessments indicated femalesa?? preference for UV-reflective over UV-absent males. During foraging, Portia labiata preferentially approached UV-reflective more often than UV-absent stabilimenta-decorated webs. Therefore, results here indicated that UV vision is important in jumping spidersa?? foraging behaviour and sexual selection.
URI: http://scholarbank.nus.edu.sg/handle/10635/12957
Appears in Collections:Ph.D Theses (Open)

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