This study deals with bleak (Alburnus alburnus) sensitivity in detecting of the wastewater related pressure in large lowland rivers. The major objective was to investigate if the response measured in bleak should be linked to a certain stretch of the river and characterised as "stretch specific", or it should be linked to the sampling site and characterised as "site specific". The response was evaluated via condition index, metal pollution index, DNA damage and cell viability using integrated biomarker response approach. The study was conducted at 3 sub-sites characterized by different pollution levels in a relatively short stretch (2 km) of the Sava River (Serbia). Results indicated that the response of the biomarkers in bleak can be interpreted as "site specific". Among the studied biomarkers, DNA damage assessed by comet assay and micronucleus test has shown high sensitivity in differentiation of the sites.
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http://dx.doi.org/10.1007/s00128-020-02944-4 | DOI Listing |
Ecol Evol
November 2024
Departamento de Anatomía, Biología Celular y Zoología, Facultad de Ciencias Universidad de Extremadura Badajoz Spain.
Recent developments in microscopic and molecular tools have allowed the implementation of new approaches for assessing parasitic infections in wildlife populations. This is particularly important for the noninvasive detection and quantification of endoparasites in live animals. Here, we combined copromicroscopic (Mini-FLOTAC) and molecular (qPCR) techniques to detect the infection of the macroparasite (Cestoda, Pseudophyllidea) in fresh droppings of Gull-billed Terns (Charadriiformes, Laridae) breeding in southwestern Spain.
View Article and Find Full Text PDFSci Total Environ
December 2024
Civil Engineering Research and Innovation for Sustainability, Instituto Superior Técnico, Universidade de Lisboa, Lisbon, Portugal.
Bleak Alburnus alburnus is a highly abundant but understudied fish species, and we know little about the trophic ecology of populations inhabiting rivers in central Europe. From an ecosystem perspective, this fish species is interesting as it is known to feed on surface insects, thereby linking the terrestrial with the aquatic habitat. In a previous study, we demonstrated that this flux is intensified, and dietary contribution of terrestrial insects is higher in fish inhabiting sections of the Spree River, Germany, that are polluted from iron oxides occurring from former lignite mining activities, and thus are characterized by lower abundances of aquatic insects.
View Article and Find Full Text PDFHeliyon
May 2024
FishLab, Department of Veterinary Sciences, University of Pisa, Viale Delle Piagge 2, 56124, Pisa, Italy.
In the present study, in order to expand the knowledge on the distribution of parasites of the genus in never investigated Italian lacustrine areas of Tuscany and Latium, fish specimens from four Tuscan lakes (Bilancino, Chiusi, Montedoglio and San Cipriano) and two Latium lakes (Bolsena and Bracciano) were collected and analyzed. The parasitological analysis, consisting of a visual inspection followed by a chloro-peptic digestion, was performed on 1650 specimens belonging to 17 species: European perch (), Pumpkinseed (), Pike-perch (), Largemouth black bass (), Pike (), Big-scale sand smelt (), Tench (), European Whitefish (), Channel catfish (), Chub (), Rudd (), Common bleak (), South European roach (), South European nase (), Italian riffle dace (), Goldfish (), and Freshwater bream (). spp.
View Article and Find Full Text PDFFish communities of streams and rivers might be substantially subsidized by terrestrial insects that fall into the water. Although such animal-mediated fluxes are increasingly recognized, little is known about how anthropogenic perturbations may influence the strength of such exchanges. Intense land use, such as lignite mining, may impact a river ecosystem due to the flocculation of iron (III) oxides, thus altering food web dynamics.
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