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

Ecology and Evolution

João Gago¹  Ana Neves²  Filipe Ribeiro²  Christos Gkenas²  Diogo Ribeiro² 

[1] Escola Superior Agrária – Instituto Politécnico de Santarém Quinta do Galinheiro – S. Pedro Santarém Portugal;MARE Centro de Ciências do Mar e do Ambiente Faculdade de Ciências da Universidade de Lisboa, Campo Grande Lisboa Portugal;

关键词: condition factor;    growth;    non‐native fishes;    phenotypic plasticity;    pikeperch;    Sander lucioperca;   

DOI  :  10.1002/ece3.7394

来源: DOAJ

【 摘 要 】

Abstract 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 environments. 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 several 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 values 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 explaining the observed phenotypic plasticity with concerns on predatory impact on native fauna.

【 授权许可】

Unknown