A new gammarid Dursogammarus dromaderus gen. et sp. nov. (Amphipoda: Gammaridae) is described from coastal Black Sea habitats of the southwestern foothills Russian Caucasus, being an obligate dweller pebbles. The species morphologically resembles representatives Echinogammarus Stebbing, 1899 and Dikerogammarus 1899, somewhat Gmelina G. O. Sars, 1894, but can be easily separated by a unique comb...

The purpose of this sudy was to examine the toxic effects of bufadienolides of antimicrobial peptides and alkoloids on Gammarus pulex L.(Crustacea:Amphipoda:Gammaridae) Bufadienolides (Arenobufagin, Arenobufagin hemisuberate, Arinobufagin 3sulfate, Bufalin, Bufalin hemisuberate, Bufoatlin 3-sulfate, Bufotalinin, Bufotalone, Cinobufagin, Cinobugagilon, Cinobufotalin, Desacetylcinobufagin, Gamabu...

Abstract The recent expansion of the round goby ( Neogobius melanostomus ) in tributaries lower Danube (Bulgaria) prompted assessing potential negative effects on local fish fauna such as competition for food resources. Diet overlap between and native fishes was analyzed using samples macroinvertebrates collected monthly a one-year period. Significant dietary N. Barbus petenyi , Perca fluviatil...