TL;DR: The results show that the metal accumulation in tissues of the both Leuciscus cephalus and Lepomis gibbosus indicates a similar variation between two stations, one of which is located after waste water discharging point and the other one before, and it is concluded that there is no heavy metal adding source in Saricay-II.
TL;DR: Phylogenetic relationships between European cyprinids were investigated by comparing cytochrome b gene sequences from 29 species, among which 20 were newly sequenced, in the first molecularly based study of cyPRinid diversity.
TL;DR: Variation of antioxidant enzymes, superoxide dismutase and glutathione S-transferases and the effect of heavy metals and selenium exposure on these enzymes were investigated in the livers of Iberian endemic minnows captured in a copper mining area.
TL;DR: From in vitro studies it was shown that lead uptake of P. laevis cystacanths in chub clearly increases by adding 1% eel bile to a commercial RMPI-1640 medium containing 0.1 microg ml(-1) Pb(2+) compared to the controls, which were maintained in RMPi-16 40 medium containing lead at the same concentration but without bile.
TL;DR: Lake Banyoles, the second largest lake of the Iberian Peninsula, has suffered a long history of fish introductions, and the historical changes in the fish assemblage is reviewed and its current state is assessed in a field study.
Abstract: The impact of exotic species is a neglected, worldwide ecological problem, particularly for freshwater fish. Examples of historical changes in southern Europe due to fish introduction are rare. Lake Banyoles, the second largest lake of the Iberian Peninsula, has suffered a long history of fish introductions. We reviewed the historical changes in the fish assemblage and assessed its current state in a field study. Before 1910, only five or six native species were present. During this century up to 12 exotic species were introduced, leading to the apparent loss of two native species (three-spined stickleback Gasterosteus aculeatus and, possibly introduced several centuries ago, tench Tinca tinca) and the decline of three others (eel Anguilla anguilla, chub Leuciscus cephalus, and barbel Barbus meridionalis). The current fish assemblage is dominated by exotic species, particularly the largemouth bass (Micropterus salmoides) and the pumpkinseed sunfish (Lepomis gibbosus) in the littoral zone and roach (Rutilus rutilus) in the pelagic zone. The only native species still common nowadays is the freshwater blenny (Salaria (= Blennius)fluviatilis).