Interpopulation Variability in Dietary Traits of Invasive Bleak Alburnus alburnus (Actinopterygii, Cyprinidae) Across the Iberian Peninsula
1
GRECO, Institute of Aquatic Ecology, University of Girona, 17003 Girona, Spain
2
Department of Biodiversity and Ecological Restoration, Instituto Pirenaico de Ecología (IPE-CSIC), 22700 Jaca, Spain
3
Department of Biodiversity, Ecology and Evolution, Complutense University of Madrid, 28040 Madrid, Spain
4
Conservation and Evolutionary Genetics Group, Estación Biológica de Doñana-CSIC, 41092 Sevilla, Spain
5
Department of Basic Medical Sciences, USP-CEU University, 28925 Alcorcón, Madrid, Spain
6
Department of Environmental Biology, University of Navarra, 31080 Pamplona, Spain
7
Department of Zoology and Physical Anthropology, University of Murcia, 30100 Murcia, Spain
8
Department of Anatomy, Cell Biology & Zoology, University of Extremadura, 06006 Badajoz, Spain
9
Department of Zoology, University of Córdoba, 14071 Córdoba, Spain
10
CNRS, Université Toulouse III Paul Sabatier, ENFA, UMR 5174 EDB (Laboratoire Évolution & Diversité Biologique), 31062 Toulouse, France
*
Author to whom correspondence should be addressed.
Water 2020, 12(8), 2200; https://doi.org/10.3390/w12082200
Received: 13 June 2020 / Revised: 9 July 2020 / Accepted: 4 August 2020 / Published: 5 August 2020
(This article belongs to the Special Issue Ecology and Conservation of Freshwater Fishes Biodiversity)
The bleak Alburnus alburnus is native to most of Europe. This cyprinid fish is a successful invader in the Iberian Peninsula. No studies exist on its foraging strategies on a large scale for this ecoregion. The aim of the present study was to compare dietary traits of invasive bleak among the main Iberian rivers and a ‘reference’ native bleak population from France. Bleak were sampled during May–June 2019 from the Iberian Rivers Ebro, Tagus, Guadiana, Segura and Guadalquivir and the River Saône (France). Diptera larvae and zooplankton were common food categories in the River Saône. Insect nymphs were more important in the River Ebro. The intake of plant material was higher in the River Tagus. Flying insects were more consumed in the River Guadiana. Nektonic insects were important in the River Guadalquivir. Detritus was a frequent food category for all populations, in terms of occurrence and mass. Dietary parameters followed a unimodal response in relation to the latitudinal gradient, with the maximum values for the Tagus and Guadiana populations. Overall, results suggest that this wide interpopulation variability will contribute to the species’ successful establishment throughout Mediterranean Europe, which poses a serious risk to its highly valuable native fish fauna.
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited
MDPI and ACS Style
Latorre, D.; Masó, G.; Hinckley, A.; Verdiell-Cubedo, D.; Castillo-García, G.; González-Rojas, A.G.; Black-Barbour, E.N.; Vila-Gispert, A.; García-Berthou, E.; Miranda, R.; Oliva-Paterna, F.J.; Ruiz-Navarro, A.; da Silva, E.; Fernández-Delgado, C.; Cucherousset, J.; Serrano, J.M.; Almeida, D. Interpopulation Variability in Dietary Traits of Invasive Bleak Alburnus alburnus (Actinopterygii, Cyprinidae) Across the Iberian Peninsula. Water 2020, 12, 2200.
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