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Title: Forced monogamy in a multiply mating species does not impede colonisation success
Author: Deacon, Amy E.
Barbosa, Miguel
Magurran, Anne E.
Keywords: invasive species
poecilia reticulata
population viability
Issue Date: 2014
Publisher: BioMed Central
Abstract: BACKGROUND: The guppy (Poecilia reticulata) is a successful invasive species. It is also a species that mates multiply; previous studies have demonstrated that this strategy carries fitness benefits. Guppies are routinely introduced to tanks and troughs in regions outside their native range for mosquito-control purposes, and often spread beyond these initial confines into natural water bodies with negative ecological consequences. Here, using a mesocosm set up that resembles the containers into which single guppies are typically introduced for mosquito control, we ask whether singly-mated females are at a disadvantage, relative to multiply-mated females, when it comes to founding a population. Treatments were monitored for one year.\n\nRESULTS: A key finding was that mating history did not predict establishment success, which was 88% in both treatments. Furthermore, analysis of behavioural traits revealed that the descendants of singly-mated females retained antipredator behaviours, and that adult males showed no decrease in courtship vigour. Also, we detected no differences in behavioural variability between treatments.\n\nCONCLUSIONS: These results suggest that even when denied the option of multiple mating, singly-mated female guppies can produce viable populations, at least at the founder stage. This may prove to be a critical advantage in typical introduction scenarios where few individuals are released into enclosed water bodies before finding their way into natural ecosystems.
Peer review: yes
DOI: 10.1186/1472-6785-14-18
ISSN: 1472-6785
Appears in Collections:CESAM - Artigos
DBio - Artigos
DBio - Artigos

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