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Parthenogenesis is self-destructive for scaled reptiles.

Matthew Owen Moreira1, Carlos Fonseca1,2, Danny Rojas3

  • 1CESAM - Centre for Environmental and Marine Studies, Department of Biology, University of Aveiro, 3810-193 Aveiro, Portugal.

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Parthenogenesis, a rare reproductive strategy in scaled reptiles (Squamata), is self-destructive due to high extinction rates. While advantageous short-term, it leads to long-term rarity in nature.

Keywords:
Squamataasexualextinctionparthenogeneticself-destruction

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Area of Science:

  • Evolutionary Biology
  • Herpetology
  • Reproductive Biology

Background:

  • Parthenogenesis, or asexual reproduction, is rare in vertebrates, with scaled reptiles (Squamata) being a notable exception.
  • Despite short-term ecological advantages, the rarity and young age of parthenogenetic species suggest long-term disadvantages.

Purpose of the Study:

  • To investigate the macroevolutionary factors contributing to the rarity of parthenogenesis in Squamata.
  • To determine if parthenogenesis is a self-destructive reproductive strategy.

Main Methods:

  • Phylogenetic analysis of 5388 Squamata species.
  • Application of tree metrics and null simulations.
  • Modeling of macroevolutionary scenarios for trait diversification.

Main Results:

  • Parthenogenesis in Squamata is characterized by high extinction rates, primarily explaining its rarity.
  • The trait arises frequently but is ultimately lost over evolutionary time.
  • Despite long-term rarity, parthenogenetic species demonstrate short-term ecological relevance.

Conclusions:

  • Parthenogenesis in scaled reptiles functions as a self-destructive reproductive strategy.
  • High extinction rates are the dominant factor limiting the long-term persistence of parthenogenetic species.
  • The occurrence of parthenogenesis highlights its short-term ecological significance despite its ultimate evolutionary trajectory.