Individual variation is the raw material for evolution and so it is important to understand how some traits are inherited and maintained across generations. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.Ĭompeting interests: The authors have declared that no competing interests exist. was funded by the Government of Panama as part of his PhD thesis. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.ĭata Availability: All raw data files will be available from the Figshare database ( 10.6084/m9.figshare.5956429).įunding: This study was supported by the Consolider-Ingenio Programme 2010, Aquagenomics project CSD2007-0002 funded by the Spanish Ministry of Science and Education, Spain to S.M. Received: MaAccepted: AugPublished: September 19, 2018Ĭopyright: © 2018 Vargas et al. Tanguay, Oregon State University, UNITED STATES Misshapen love drivers#The implications of this study are important for zebrafish breeding and husbandry in captivity and are relevant toward understanding the underlying drivers of trait selection in natural environments.Ĭitation: Vargas R, Mackenzie S, Rey S (2018) ‘Love at first sight’: The effect of personality and colouration patterns in the reproductive success of zebrafish ( Danio rerio). Under these conditions the reproductive success is enhanced. Our findings imply that fitness of this species when kept under similar husbandry conditions is significantly influenced by parental personality and not by their external appearance. Proactive phenotypes from WT-UAB population had a higher overall fitness in comparison to the other phenotypes studied. This was reflected in a higher percentage of spawning viability at 1day post fertilization (dpf), higher total survival and growth rates at larval stages. Our results show that personality traits were the main source of variability between the fitness components measured: both personalities had similar total numbers of eggs spawned but proactive animals, for both colour phenotypes, had higher reproductive success. We then compared their reproductive success (spawning rate) and offspring survival at different stages, from egg to larvae, and for 2 successive generations (parental generation was G0 First and second generations were G1 and G2 respectively). All animals were also screened for personality. We selected two different phenotypes of the zebrafish ( Danio rerio) selected by their colouration patterns: phenotype 1) named Wild type, UAB line (WT-UAB) with a homogeneous colouration pattern (clear and defined lateral stripes) and phenotype 2) Wild type indefinite (WT-I) had a heterogeneous colouration pattern and different degrees of lateral stripe definition. In this study, we evaluated two major parameters contributing to the fitness of the species: reproduction and offspring survival. Currently little is known about how both factors interact and their effect on reproductive success. A significant body of research has explored many of pertinent ecological and biological aspects that can be affected by them and their impact upon fitness. Individual differences in animal personality and external appearance such as colouration patterns have both been extensively studied separately.
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