Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/224576
Title: COSTS AND BENEFITS OF THE EXAGGERATED CHELICERAE IN THE ANT-MIMICKING JUMPING SPIDERS
Authors: WONG BOON HUI
ORCID iD:   orcid.org/0000-0002-8722-6840
Keywords: benefits, costs, exaggerated chelicerae, jumping spiders, Myrmarachne, sexual selection
Issue Date: 13-Dec-2021
Citation: WONG BOON HUI (2021-12-13). COSTS AND BENEFITS OF THE EXAGGERATED CHELICERAE IN THE ANT-MIMICKING JUMPING SPIDERS. ScholarBank@NUS Repository.
Abstract: Exaggerated traits are often sexually selected. The ant-mimicking jumping spiders, Myrmarachne sensu lato, present potential models by having good vision and disproportionately large chelicerae. Morphometric analysis of three species of ant-mimicking salticids revealed significant sexual dimorphism as well as positive allometric scaling in their exaggerated chelicerae. Results showed that both female mate choice and contest outcomes were dependent on chelicera size. Exaggerated chelicerae did not affect prey capture efficacy significantly. Meanwhile, exaggerated chelicerae were positively correlated to several morphological structures. Absence of negative effect on prey capture efficacy may be partly explained by the compensatory effect from these morphological structures, which offset the potential cost from bearing enlarged weapons. I concluded that sexually dimorphic exaggerated chelicerae confer reproductive benefit whereby males with larger chelicerae were more likely to win contest while incurring little realized cost from prey capture efficacy through compensation from other viability traits.
URI: https://scholarbank.nus.edu.sg/handle/10635/224576
Appears in Collections:Ph.D Theses (Restricted)

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