acta ethologica

, 14:77

Examination of boldness traits in sexual and asexual mollies (Poecilia latipinna, P. formosa)

  • Kristin Scharnweber
  • Martin Plath
  • Michael Tobler
Original Paper

Abstract

Considering the high costs of sexual reproduction (e.g., the production of males), its maintenance and predominance throughout the Animal Kingdom remain elusive. Especially the mechanisms allowing for a stable coexistence of closely related sexual and asexual species are still subject to a lively debate. Asexuals should rapidly outnumber sexuals due to higher population growth rates, unless they face some disadvantages. Here, we investigate potential differences in feeding behavior in a system of sexual (sailfin mollies, Poecilia latipinna) and coexisting gynogenetic fishes (Amazon mollies, Poecilia formosa). In two different experiments, we tested for differences in behavioral traits associated with boldness. Bold individuals take higher risks for gains in resources, so shyer individuals should be less competitive. Our study was motivated by the recent finding that P. formosa are less likely to be preyed upon by piscine predators than P. latipinna. We asked whether this result is indicative of low boldness in P. formosa. However, no differences between the two species were detectible in our behavioral experiments measuring (a) time to emerge from shelter to explore a novel environment, (b) latency time until feeding in a novel environment, and (c) recovery time until feeding restarted after a simulated predator attack. Furthermore, different boldness measures were not correlated with each other within individuals.

Keywords

Aggressive behavior Amazon molly Behavioral syndromes Competition Foraging Maintenance of sex Poeciliidae 

Supplementary material

10211_2011_97_MOESM1_ESM.doc (109 kb)
ESM 1(DOC 109 kb)

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Copyright information

© Springer-Verlag and ISPA 2011

Authors and Affiliations

  • Kristin Scharnweber
    • 1
  • Martin Plath
    • 2
  • Michael Tobler
    • 3
    • 4
  1. 1.Department of Biology and Ecology of FishesLeibniz Institute of Freshwater Ecology & Inland FisheriesBerlinGermany
  2. 2.Department of Ecology and Evolution, Institute of Ecology, Evolution and DiversityJ.W. Goethe University FrankfurtFrankfurt am MainGermany
  3. 3.Department of Wildlife and Fisheries SciencesTexas A&M UniversityCollege StationUSA
  4. 4.Department of ZoologyOklahoma State UniversityStillwaterUSA

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