Carrete, Martina

Profesor/a Contratado Doctor
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Universidad Pablo de Olavide
Sistemas Físicos, Químicos y Naturales
Research Center
Research Group
Organismos y Sistemas
Recursos Naturales, Energía y Medio Ambiente
PhD programs
Biodiversidad y Biología de la Conservación
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Now showing 1 - 2 of 2
  • Publication
    Data from: Behaviour-related DRD4 polymorphisms in invasive bird populations
    (Dryad, 2014-05-23) Mueller, Jakob C.; Edelaar, Pim; Carrete, Martina; Serrano, David; Potti, Jaime; Blas, Julio; Dingemanse, Niels J.; Kempenaers, Bart; Tella, José Luis
    It has been suggested that individual behavioural traits influence the potential to successfully colonize new areas. Identifying the genetic basis of behavioural variation in invasive species thus represents an important step towards understanding the evolutionary potential of the invader. Here, we sequenced a candidate region for neophilic/neophobic and activity behaviour - the complete exon 3 of the DRD4 gene - in 100 Yellow-crowned bishops (Euplectes afer) from two invasive populations in Spain and Portugal. The same birds were scored twice for activity behaviour while exposed to novel objects (battery or slice of apple) in captivity. Response to novel objects was repeatable (r = 0.41) within individuals. We identified two synonymous DRD4 SNPs that explained on average between 11% and 15% of the phenotypic variance in both populations, indicating a clear genetic component to the neophilic/neophobic/activity personality axis in this species. This consistently high estimated effect size was mainly due to the repeated measurement design, which excludes part of the within-individual nongenetic variance in the response to different novel objects. We suggest that the alternative alleles of these SNPs are likely introduced from the original population and maintained by weak or antagonistic selection during different stages of the invasion process. The identified genetic variants have not only the potential to serve as genetic markers of the neophobic/neophilic/activity personality axis, but may also help to understand the evolution of behaviour in these invasive bird populations.
  • Publication
    Selection on individuals of introduced species starts before introduction.
    (Wiley, 2020) Baños-Villalba, Adrián; Carrete, Martina; Tella, José Luis; Blas, Julio; Potti, Jaime; Camacho, Carlos; Sega Diop, Moussa; Marchant, Tracy A.; Cabezas, Sonia; Edelaar, Pim
    Biological invasion is a global problem with large negative impacts on ecosystems and human societies. When a species is introduced, individuals will first have to pass through the invasion stages of uptake and transport, before actual introduction in a non-native range. Selection is predicted to act during these earliest stages of biological invasion, potentially influencing the invasiveness and/or impact of introduced populations. Despite this potential impact of pre-introduction selection, empirical tests are virtually lacking. To test the hypothesis of pre-introduction selection, we followed the fate of individuals during capture, initial acclimation, and captivity in two bird species with several invasive populations originating from the international trade in wild-caught pets (the weavers Ploceus melanocephalus and Euplectes afer). We confirm that pre-introduction selection acts on a wide range of physiological, morphological, behavioral, and demographic traits (incl. sex, age, size of body/brain/bill, bill shape, body mass, corticosterone levels, and escape behavior); these are all traits which likely affect invasion success. Our study thus comprehensively demonstrates the existence of hitherto ignored selection acting before the actual introduction into non-native ranges. This could ultimately change the composition and functioning of introduced populations, and therefore warrants greater attention. More knowledge on pre-introduction selection also might provide novel targets for the management of invasive species, if pre-introduction filters can be adjusted to change the quality and/or quantity of individuals passing through such that invasion probability and/or impacts are reduced.