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Journal of Applied Ecology
Article . 2016 . Peer-reviewed
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testing the link between perceived and actual risk of predation mosquito oviposition site selection and egg predation by native and introduced fish

Authors: Ruhan Verster; Ori Segev; Ché Weldon;

testing the link between perceived and actual risk of predation mosquito oviposition site selection and egg predation by native and introduced fish

Abstract

SummaryAccording to the threat‐sensitivity hypothesis, prey avoidance behaviour should reflect the magnitude of predation risk. Since predation can strongly affect reproduction success, ovipositing females are expected to adaptively adjust their predator avoidance response, or local breeding patch selectivity, in accordance with the perceived level of threat posed for their progeny by specific predators. However, association between avoidance and predation can be disrupted when the prey and the predator lack spatiotemporal opportunities to co‐evolve, such as in cases of non‐native predator introductions.We examined the interactions between mosquitoes (from the genusCulex) and three species of sympatric predaceous freshwater fish, a native cyprinidBarbus paludinosus, a cichlidPseudocrenilabrus philanderand an introduced poeciliid, the western mosquitofishGambusia affinis.In an outdoor mesocosm experiment, we quantified patterns ofCulexoviposition site selection across fish species using free‐roaming, caged and fish‐free treatments. In a complementary laboratory experiment, we tested the effectiveness of each fish species as predators of mosquito eggs and larvae.Synthesis and applications. We found evidence for: (i) mosquito egg raft predation by free‐roaming fish; (ii) fish‐specific avoidance by ovipositingCulex; and (iii) a positive association between fish‐specific oviposition avoidance and fish‐specific efficiency as an egg predator. These results contribute towards a better understanding of predator–prey co‐evolution, predator‐borne cue recognition, and suggest local native fish, the southern mouthbrooderPseudocrenilabrus philander, as an alternative toGambusiafor the biocontrol ofCulexmosquitoes.

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
15
Top 10%
Average
Average
bronze
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