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Published on: May 12, 2019
Evolutionary causes and consequences of sequential polyandry in anuran amphibians
Phillip G Byrne1, J Dale Roberts
1The Institute for Conservation Biology & Environmental Management, School of Biological Sciences, University of Wollongong, Wollongong, Australia. pbyrne@uow.edu.au
Summary
Sequential polyandry in anurans (frogs and toads) may be common, offering benefits like risk spreading and genetic diversity. Further research is needed to understand its evolutionary implications.
Area of Science:
- * Zoology
- * Evolutionary Biology
- * Herpetology
Background:
- * Anuran amphibians exhibit two forms of polyandry: simultaneous and sequential.
- * Sequential polyandry involves a female mating with multiple males sequentially, without sperm competition.
- * This mating system's occurrence and implications in anurans are not fully understood.
Purpose of the Study:
- * To review the occurrence of sequential polyandry in anuran amphibians.
- * To outline theoretical explanations for its evolution.
- * To discuss potential evolutionary implications and research opportunities.
Main Methods:
- * Literature review of sequential polyandry in anurans.
- * Analysis of shared characteristics in species with this mating pattern.
- * Theoretical outlining of evolutionary benefits and implications.
Main Results:
- * Sequential polyandry is reported in a limited but widespread number of anurans, suggesting it may be common.
- * Species with sequential polyandry share behavioral, morphological, and physiological traits, indicating common sexual selection.
- * No empirical studies have explicitly investigated the evolutionary consequences.
Conclusions:
- * Sequential polyandry offers potential adaptive benefits: risk spreading, insurance against infertility, and genetic benefits (good genes, compatibility, diversity).
- * Anurans with sequential polyandry present opportunities for research into anuran evolution, sexual selection, and life-history theory.
- * Further empirical research is crucial to understand the evolutionary consequences of this mating system.
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