A procedure is proposed to assess the impact of various relationships found in literature and used convert acoustic target strengths (TS) fishes’ total length (TL) with respect compatibility fish data obtained from vertical hydroacoustics gillnets. The study one set collected a 120 kHz echosounder across mesotrophic, dimictic Lake Dejguny. Four general multi-species TS–TL were tested for maximu...

Aquatic prey show behavioral modifications in the presence of predation-risk cues that alleviate their risk from predation. Aedes albopictus (Skuse), Aedes japonicus (Theobald), and Culex pipiens L. are invasive mosquitoes in North America, and their larvae are prey for the native mosquito predator, Toxorhynchites rutilus (Coquillett). Ae. albopictus and Ae. japonicus are recent invaders, where...

Multiple predator species can interact as well as strongly affect lower trophic levels, resulting in complex, nonadditive effects on prey populations and community structure. Studies of aquatic systems have shown that interactive effects of predators on prey are not necessarily predictable from the direct effects of each species alone. To test for complex interactions, the individual and combin...

A new species of amphizoic amoeba, Nuclearia pattersoni sp. n., isolated from gills of Rutilus rutilus L. is described. It is characterised by elongate flattened trophozoites of irregular shape. The longer dimension of their bodies is 13.2 (11.0-15.7) microm. Filopodia radiating mostly from the poles are 2 to 2.5 times longer than the body. The diameter of less frequently observed spherical tro...

Infection with the liver fluke, Opisthorchis felineus, caused by consumption of infected raw or undercooked cyprinid fish is common in humans and carnivores middle Ob River basin (Tomsk region, Russia) can lead to diseases humans. The goal this study was status infection O. felineus metacercariae order assess role human population basin. Of 14 Cyprinidae species recorded basin, we examined 6 fo...