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Related Concept Videos

Mate Choice01:20

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Parental Care00:55

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Related Experiment Video

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Individual Culturing of Tigriopus Copepods and Quantitative Analysis of Their Mate-guarding Behavior
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Multi-year pair-bonding in Murray cod (Maccullochella peelii).

Alan J Couch1, Fiona Dyer1, Mark Lintermans1

  • 1Centre for Applied Water Science, University of Canberra, Canberra, ACT, Australia.

Peerj
|December 23, 2020
PubMed
Summary

This study reveals multi-year pair bonding in a wild freshwater fish, challenging previous assumptions about monogamy in these species. Genetic analysis using single nucleotide polymorphisms (SNPs) confirmed sibling pairs, supporting long-term mating strategies.

Keywords:
MaccullochellaMating strategyMonogamyMurray codPair-bondsnp

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Area of Science:

  • Evolutionary biology
  • Ichthyology
  • Molecular ecology

Background:

  • Mating strategies in fishes, including polygyny, polyandry, and monogamy, are crucial for understanding sexual selection.
  • Monogamy in freshwater fishes has been understudied, with most research focusing on marine species and observational methods.
  • Long-term pair bonding, common in other vertebrates, has not been previously documented in wild freshwater fishes.

Purpose of the Study:

  • To investigate the occurrence of long-term pair bonding and monogamous mating strategies in a wild freshwater fish species.
  • To apply advanced molecular techniques for inferring mating behaviors in the absence of parental genotypes.
  • To provide insights into the evolutionary dynamics of mating systems in freshwater ichthyofauna.

Main Methods:

  • Utilized single nucleotide polymorphisms (SNPs) as a molecular tool for genetic analysis in a non-model organism.
  • Employed probabilistic genetic analysis methods to infer sibling relationships and mating strategies without parental genotypes.
  • Analyzed stable isotope signatures in larvae to corroborate genetic findings regarding maternal lineage.

Main Results:

  • Demonstrated multi-year pair bonding in an Australian Percichthyid fish exhibiting paternal care.
  • Identified full sibling pairs of larvae across multiple years using SNP data, confirming monogamous mating.
  • Stable isotope data supported the genetic inference of shared maternal origin for sibling larvae.
  • Spatial and temporal clustering of sibling larvae reduced the likelihood of false positive identifications.

Conclusions:

  • Established the first evidence of multi-year pair bonding in a wild freshwater fish.
  • Highlighted significant conservation and management implications for the studied species.
  • Proposed the SNP-based approach as a valuable tool for studying mating strategies and behavioral ecology in diverse freshwater fish populations.
  • Encouraged further research into monogamy and alternative mating strategies in freshwater fishes, alongside improvements in SNP data analysis methods.