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Exploring the threat-sensitive predator avoidance hypothesis on mate competition in two wild populations of Trinidadian guppies.

Author(s): Chuard PJC, Grant JWA, Ramnarine IW, Brown GE

The intensity of mate competition is often influenced by predation pressure. The threat-sensitive predator avoidance hypothesis predicts that prey should precisely adjust their fitness-related activities to the level of perceived acute predation risk and th...

Article GUID: 32860863
Competition for food in 2 populations of a wild-caught fish.

Author(s): Chuard PJC, Brown GE, Grant JWA

Curr Zool. 2018 Oct;64(5):615-622 Authors: Chuard PJC, Brown GE, Grant JWA

Article GUID: 30323840
Title:Exploring the threat-sensitive predator avoidance hypothesis on mate competition in two wild populations of Trinidadian guppies.
Authors:Chuard PJC,  Grant JWA,  Ramnarine IW,  Brown GE
Link:https://www.ncbi.nlm.nih.gov/pubmed/32860863
DOI:10.1016/j.beproc.2020.104225
Category:Behav Processes
PMID:32860863
Dept Affiliation: BIOLOGY
1 Department of Biology, Concordia University, Montréal, QC, H4B 1R6, Canada. Electronic address: pierre.chuard2@gmail.com.
2 Department of Biology, Concordia University, Montréal, QC, H4B 1R6, Canada. Electronic address: james.grant@concordia.ca.
3 Departmentof Life Sciences, The University of the West Indies, St Augustine, Trinidad and Tobago. Electronic address: Indar.Ramnarine@sta.uwi.edu.
4 Department of Biology, Concordia University, Montréal, QC, H4B 1R6, Canada. Electronic address: grant.brown@concordia.ca.

Description:

Exploring the threat-sensitive predator avoidance hypothesis on mate competition in two wild populations of Trinidadian guppies.

Behav Processes. 2020 Aug 26; :104225

Authors: Chuard PJC, Grant JWA, Ramnarine IW, Brown GE

Abstract

The intensity of mate competition is often influenced by predation pressure. The threat-sensitive predator avoidance hypothesis predicts that prey should precisely adjust their fitness-related activities to the level of perceived acute predation risk and this effect should be stronger under high background risk. Individuals should compensate during periods of moderate risk for lost opportunities during high risk. Our study examined the interaction between acute and background predation risk on mate competition. Under laboratory conditions, we explored the effects of acute risk (low vs. high) using chemical alarm cue (AC; control (results presented in Chuard et al. (2016)) The effects of adult sex ratio on mating competition in male and female guppies (Poecilia reticulata) in two wild populations. Behav Process 129:1-10), 25% concentration, and 100% concentration), and population of origin (low vs. high background risk) on mate competition in guppies (Poecilia reticulata). Surprisingly, males favored courtship over forced mating under acute predation risk irrespective of background risk, potentially benefiting from a female preference for bold males. We discuss our results in the context of chemical threat-sensitivity and resource differences in defendability (e.g. mates vs. food).

PMID: 32860863 [PubMed - as supplied by publisher]