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Genetic Variability Related Behavioral Plasticity in Pikeperch (Sander lucioperca L.) Fingerlings.

Ildikó Benedek1, Béla Urbányi2, Balázs Kovács3

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Animals : an Open Access Journal From MDPI
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PubMed
Summary

Feeding behavior significantly impacts genetic diversity in pikeperch. Pellet consumption, a key domestication trait, is genetically based and acts as a selective force, altering genetic variability in populations.

Keywords:
individual heterozygositymicrosatelliteneutral genetic diversitypellet consumptionpikeperchselection

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Area of Science:

  • Aquatic Ecology
  • Animal Behavior
  • Population Genetics

Background:

  • The link between genetic diversity and fitness is established, but the reciprocal influence of behavior on genetic diversity remains understudied.
  • This research explores the interplay between feeding behavior and genetic diversity in pikeperch ( *Sander lucioperca*), a predatory fish species.

Purpose of the Study:

  • To investigate the relationship between feeding behavior, specifically pellet consumption, and genetic diversity in juvenile pikeperch.
  • To determine the genetic basis of pellet habituation and its influence on population genetic structure.

Main Methods:

  • Utilized 135 juvenile pikeperch from a single stock, categorized by feeding behavior: pellet consumers, pellet refusers, and cannibals.
  • Employed 18 microsatellite markers to assess genetic diversity and population structure among behavioral groups.

Main Results:

  • Identified two primary genetic clusters, one linked to pellet consumption and the other to pellet refusal (including cannibals).
  • One microsatellite marker showed significant genetic segregation, with pellet consumption associated with shorter fragment lengths.
  • Individuals in the pellet-refusing group exhibited higher multilocus heterozygosity.

Conclusions:

  • Pellet consumption functions as an unrecognized selective pressure during fish domestication, shaping genetic variability.
  • The capacity for pellet habituation is underpinned by a significant genetic component.
  • Cannibalism's genetic impact is negligible and its occurrence is independent of pellet-feeding propensity.