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Related Experiment Videos

Multiple paternity in the loggerhead turtle (Caretta caretta).

J L Harry1, D A Briscoe

  • 1School of Biological Sciences, Macquarie University, Sydney, N.S.W., Australia.

The Journal of Heredity
|March 1, 1988
PubMed
Summary

Loggerhead turtle (Caretta caretta) breeding patterns reveal that multiple insemination is common, with one-third of clutches showing evidence of multiple fathers. This suggests a major shift from the expected single paternity breeding strategy.

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Area of Science:

  • Marine Biology
  • Reproductive Ecology
  • Conservation Genetics

Background:

  • Loggerhead turtles (Caretta caretta) exhibit nesting behaviors at rookeries like Mon Repos, Queensland.
  • Understanding reproductive strategies is crucial for the conservation of endangered sea turtle populations.
  • Mendelian genetic ratios are typically expected under assumptions of single paternity.

Purpose of the Study:

  • To investigate the frequency of multiple paternity in loggerhead turtle clutches.
  • To determine the predominant mating system in loggerhead turtles at the Mon Repos rookery.
  • To explore potential mating behaviors, such as mating between nesting events.

Main Methods:

  • Analysis of genotypic ratios within loggerhead turtle (Caretta caretta) clutches.

Related Experiment Videos

  • Comparison of observed genotypic frequencies against expected Mendelian ratios under single paternity.
  • Statistical evaluation to determine deviations from expected ratios.

    • Main Results:

    • Genotypic ratios in loggerhead turtle clutches significantly deviated from Mendelian expectations.
    • Evidence of multiple insemination was found in approximately one-third of the studied clutches.
    • Observations suggest that loggerhead turtles may engage in mating activities between nesting events.

    Conclusions:

    • Multiple mating and multiple insemination appear to be the predominant breeding pattern for loggerhead turtles (Caretta caretta) at Mon Repos.
    • The findings challenge the traditional assumption of single paternity in loggerhead turtle reproduction.
    • Further research into the timing and frequency of mating behaviors, including inter-nesting mating, is warranted for effective conservation strategies.