The six species of the Epeolus cruciger group from Asia are reviewed. Two new species, asiaticus Astafurova & Proshchalykin, sp. nov. (Mongolia, Russia) and E. gorodkovi Astafurova, (Tajikistan, Afghanistan) described illustrated. alpinus Friese, 1893 is newly recorded Kazakhstan; (Panzer, 1799) Turkmenistan, Uzbekistan, Kyrgyzstan; mongolicus 2021 Kyrgyzstan Russia. An identification key f...

Dispersal abilities and the resulting levels of connectivity between streams influence population structure in aquatic organisms. We investigated how different dispersal life-history traits affect gene flow three invertebrate species a central European mountain range. used microsatellite markers mitochondrial cytochrome oxidase I barcode data to assess small-scale mayfly Baetis alpinus, stonefl...

The size of mouthparts and their constituent organelles was studied in cells of Dileptus anser, enlarged by overfeeding. The oral structures of large cells were either of normal dimensions and appearance, or they were enlarged and deformed in shape. The increase in size of mouthparts was accompanied by an increase in number of their microtubular organelles. There was, however, no net increase i...

We estimated local and metapopulation effective sizes ([Formula: see text] and meta-[Formula: see text]) for three coexisting salmonid species (Salmo salar, Salvelinus fontinalis, Salvelinus alpinus) inhabiting a freshwater system comprising seven interconnected lakes. First, we hypothesized that [Formula: see text] might be inversely related to within-species population divergence as reported ...

KNUDSEN, R. and KLEMETSEN, A. 1994. Infections of Diphyllobothrium dendriticum, D. ditremum (Cestoda), and Cystidicola farionis (Nematoda) in a north Norwegian population of Arctic charr (Salvelinus alpinus) during winter. Can. J. Zool. 72: 1922-1930. Infections of the parasites Diphyllobothrium dendriticum, Diphyllobothrium ditremum, and Cystidicola farionis in Arctic charr (Salvelinus alpinus...