14 documents found, page 1 of 2
Reproductive traits of the European catfish, Silurus glanis, during the early s...
Gkenas, C.; Sequeira, V.; Ribeiro, D.; Gago, João; Dias, D.; Verma, C.R.; Kumkar, P.; Ribeiro, F.In recent decades, the European catfish Silurus glanis has spread across Europe and elsewhere, significantly impacting the native fauna of the recipient ecosystems. Studies on its reproductive traits from its non-native range are limited, although this is a critical step in developing effective management plans. Here, we explore the reproductive characteristics of invasive European catfish populations in the Lo...
Westwards expansion of the European catfish Silurus glanis in the Douro River (...
Gkenas, C.; Martelo, J.; Ribeiro, D.; Gago, João; Santos, G.; Dias, D.; Ribeiro, F.The current study reports the first occurrence and the spread of the European catfish Silurus glanis (Family: Siluridae) in the Portuguese section of the Douro River, suggesting a potential expansion of its distribution in Portugal either via westward dispersal across international rivers and/or human-assisted introductions into new reservoirs and drainages. The European catfish has unique features (e.g., oppor...
Local environment and fragmentation by drought and damming shape different comp...
Martelo, J.; Gkenas, C.; Ribeiro, D.; Alves, M.J.; Ribeiro, F.; Cucherousset, J.; Gago, João; Magalhães, M.F.Pool refuges are critical for maintaining stream fish diversity in increasingly intermittent streams. Yet, the patterns and drivers of beta diversity of native and non-native fish in pool refuges remain poorly known. Focusing on Mediterranean streams, we decomposed beta diversity of native and non-native fish into richness difference (RichDiff) and species replacement (Repl), and local (LCBD, LCBDRichDiff and L...
DNA metabarcoding reveals the diet of the invasive fish Oreochromis mossambicus...
Nogueira, S.; Curto, M.; Gkenas, C.; Afonso, F.; Dias, D.; Heumüller, J.; Félix, P. M.; Silva De Lima, Rivete; Chaínho, P.; Brito, A. C.; Ribeiro, F.Invasive species can trigger profound effects on recipient ecosystems, namely through the food web. Despite being recognized as one of the worst invasive species, little is known about the feeding ecology of the Mozambique tilapia Oreochromis mossambicus. To understand how this invasive species might impact food webs, we applied metabarcoding to analyze its diet’s composition in two African mangroves, in the Ob...
Widespread hybridization between Invasive bleak (Alburnus alburnus) and Iberian...
Curto, M.; Morgado-Santos, M.; Alexandre, C.M.; Alves, M.J.; Gante, H.F.; Gkenas, C.; Medeiros, J.P.; Pinheiro, P.J.; Almeida, P.R.; Magalhães, M.F.Hybridization between native and nonnative fish species is a major conservation issue, especially in ecosystems with high levels of endemism, such as Iberian streams. To date, hybridization with the invasive bleak Alburnus alburnus has been reported for the Iberian chub Squalius alburnoides and S. pyrenaicus and in scattered locations only. However, the bleak is spreading in the region, potentially increasing t...
Widespread hybridization between Invasive bleak (Alburnus alburnus) and Iberian...
Curto, M.; Morgado-Santos, M.; Alexandre, C.M.; Alves, M.J.; Gante, H.F.; Gkenas, C.; Medeiros, J.P.; Pinheiro, J.P.; Almeida, P.R.; Magalhães, M.F.Hybridization between native and nonnative fish species is a major conservation issue, especially in ecosystems with high levels of endemism, such as Iberian streams. To date, hybridization with the invasive bleak Alburnus alburnus has been reported for the Iberian chub Squalius alburnoides and S. pyrenaicus and in scattered locations only. However, the bleak is spreading in the region, potentially increasing t...
Evaluating the range expansion of recreational non-native fishes in Portuguese ...
Martelo, J.; Costa, L. M.; Ribeiro, D.; Gago, João; Magalhães, M. F.; Gante, H. F.; Alves, M. J.; Cheoo, G.; Gkenas, C.; Banha, F.; Gama, M.Updating information on the distribution of recently introduced and other poorly known non-natives is essential to prevent and control their spread and better address biological invasions. Here, we combine scientific and citizen science data to update the distribution of five recently arrived (i.e., < 25 years), non-native fish species (Alburnus alburnus, Ameiurus melas, Rutilus rutilus, Sander lucioperca and S...
Variation in diet patterns of the invasive top predator Sander lucioperca (Linn...
Ribeiro, D.; Gkenas, C.; Gago, João; Ribeiro, F.The introduction of non-native species is recognized as a major threat to biodiversity, particularly in freshwater ecosystems. Pikeperch Sander lucioperca, is a recent invader to Portugal, primarily providing commercial and angling interest. The aim of this work was to study the diet of this top predator across Portuguese basins and to evaluate its potential impact on recipient ecosystems. In total, 256 pikeper...
Condition and size of the non-native pikeperch Sander lucioperca (Linnaeus, 175...
Gago, João; Neves, A.; Gkenas, C.; Ribeiro, D.; Ribeiro, F.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 an...
Diet of non-native pikeperch Sander lucioperca (Linnaeus, 1758) in Portugal: a ...
Ribeiro, D.R.; Gago, João; Gkenas, C.; Ferreira, M.; Gabriel, S.; Ribeiro, F.The introduction rate of new species is expanding worldwide, being a major driver of biodiversity loss and biotic homogenisation (Strayer & Dudgeon 2010). Such phenomenon is particularly serious in Mediterranean regions (Anastácio et al. 2019) with the modification of habitats (construction of dams and barriers) associated with the establishment of non-native fish (hereafter NNF) (Radinger et al. 2019). The spr...