The introduction of non-native species is recognized as a major threat to biodiversity, particularly in freshwater ecosystems. Pikeperch Sander lucioperca, recent invader Portugal, primarily providing commercial and angling interest. aim this work was study the diet top predator across Portuguese basins evaluate its potential impact on recipient In total, 256 pikeperch stomachs from seven were ...

Abstract Greater Prespa Lake, located on the Balkan Peninsula, is an ancient freshwater lake inhabited by numerous endemic and endangered species represents important part of Europe’s natural heritage. Between 2013 2015, standardized gillnet fishing was conducted for first time ever with aim obtaining large-scale information status fish community in terms relative abundance, biomass, spatial di...

Besides traditional methods based on morphological characters, electrophoretic such as SDS-PAGE are preferred by taxonomists to make the right decision in species identification process. In addition, effect of environmental factors, pH, salinity, heat, and temperature protein profiles essential various studies. this study, we aimed determine degree relationship some fish species, Squalius lepid...

as a part of a major ecological study of hanna wetland, semirum region, isfahan province, parasitic infestation of 3 native and one introduced fish species were investigated. a total of 120 fish specimens were collected by both cast net and a series of gillnets between fall and winter 2007, and spring and summer 2008. some of the observed parasites are reported for the first time as new host re...

in this study, age and growth for two populations of shemaya, chalcalburnus chalcoides, in haraz and shirud rivers were investigated from april to june 2006. 704 fish specimens were collected using a cast- net. the maximum length and weight in a 5- year old female observed were 251 mm and 96 gr, respectively. the most abundant age groups were 2+ and 3+ years for male and female respectively. wh...