BIBLIOS

Document type
Journal articles

Document subtype
Full paper

Title
Condition and size of the non?native pikeperch Sander lucioperca (Linnaeus, 1758) in Portuguese river basins

Participants in the publication
João Gago (Author)
Ana Neves (Author)
Christos Gkenas (Author)
MARE - Centro de Ciências do Mar e Ambiente, -Universidade de Lisboa
Diogo Ribeiro (Author)
MARE - Centro de Ciências do Mar e Ambiente, -Universidade de Lisboa
Filipe Ribeiro (Author)
MARE

Summary
We studied life- history traits focusing on the growth and condition of the pikeperch Sander lucioperca to evaluate its phenotypic plasticity when introduced to new en-vironments. Pikeperch is a non- native fish introduced to Iberian freshwater fauna in 1998 that quickly spread to other river basins through human- mediated activities, occupying now a wide variety of habitats along mainland Portugal. Condition (K and SMI), fork length at age, and length– weight relationships were studied for Portuguese populations. Pikeperch fork length for ages 1, 2, 3, and 4 was different between sev-eral populations. We applied generalized linear models (GLM) to study the influence of habitat type, latitude, altitude, time after first detection, and fish prey richness on pikeperch populations size at age 4 and condition. We observed higher condition val-ues on populations from lower altitudes at lentic systems more recently introduced. But higher fork length at age 4 was found in populations from higher altitudes, on older populations with higher prey richness. Habitat type, time since first detection, and fish fauna composition are discussed as the main environmental factors explain-ing the observed phenotypic plasticity with concerns on predatory impact on native fauna.


Where published
Ecology and Evolution

Publication Identifiers
ISSN - 2045-7758

Publisher
Wiley



Document Identifiers
DOI - https://doi.org/10.1002/ece3.7394
URL - http://dx.doi.org/10.1002/ece3.7394