How populations persist when asexuality requires sex: the spatial dynamics of coping with sperm parasites

dc.contributor.authorKokko, Hanna
dc.contributor.authorHeubel, Katja
dc.contributor.authorRankin, Daniel J.
dc.date.accessioned2015-12-10T22:27:00Z
dc.date.issued2008
dc.date.updated2015-12-09T09:36:51Z
dc.description.abstractThe twofold cost of sex implies that sexual and asexual reproduction do not coexist easily. Asexual forms tend to outcompete sexuals but may eventually suffer higher extinction rates, creating tension between short- and long-term advantages of different reproductive modes. The 'short-sightedness' of asexual reproduction takes a particularly intriguing form in gynogenetic species complexes, in which an asexual species requires sperm from a related sexual host species to trigger embryogenesis. Asexuals are then predicted to outcompete their host, after which neither species can persist. We examine whether spatial structure can explain continued coexistence of the species complex, and assess the evidence based on data on the Amazon molly (Poecilia formosa). A modification of the Levins metapopulation model creates two regions of good prospects for coexistence, connected by a region of poorer patch occupancy levels. In the first case, mate discrimination and/or niche differentiation keep local extinction rates low, and most patches contain both species; the other possibility resembles host-parasite dynamics where parasites frequently drive the host locally extinct. Several dynamical features are counterintuitive and relate to the parasitic nature of interactions in the species complex: for example, high local extinction rates of the asexual species can be beneficial for its own persistence. This creates a link from the evolution of sexual reproduction to that of prudent predation.
dc.identifier.issn0962-8452
dc.identifier.urihttp://hdl.handle.net/1885/54007
dc.publisherRoyal Society of London
dc.sourceProceedings of the Royal Society of London Series B: Biological Sciences
dc.subjectKeywords: asexual reproduction; coexistence; coping strategy; cyprinid; embryonic development; evolutionary biology; host-parasite interaction; mate choice; niche; population dynamics; sexual reproduction; spatial analysis; sperm; spermatophore; article; asexual re Evolution of sex; Mate choice; Metapopulation dynamics
dc.titleHow populations persist when asexuality requires sex: the spatial dynamics of coping with sperm parasites
dc.typeJournal article
local.bibliographicCitation.lastpage825
local.bibliographicCitation.startpage817
local.contributor.affiliationKokko, Hanna, College of Medicine, Biology and Environment, ANU
local.contributor.affiliationHeubel, Katja, University of Helsinki
local.contributor.affiliationRankin, Daniel J., University of Helsinki
local.contributor.authoremailrepository.admin@anu.edu.au
local.contributor.authoruidKokko, Hanna, u4787851
local.description.embargo2037-12-31
local.description.notesImported from ARIES
local.identifier.absfor060201 - Behavioural Ecology
local.identifier.ariespublicationu9511635xPUB288
local.identifier.citationvolume275
local.identifier.doi10.1098/rspb.2007.1199
local.identifier.scopusID2-s2.0-39149095927
local.identifier.thomsonID000253166300010
local.identifier.uidSubmittedByu9511635
local.type.statusPublished Version

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