First Data on Seasonal Changes in Feeding of the Amur Sleeper Perccottus glenii (Odontobutidae) in the South of West Siberia

Journal of Ichthyology - The data on feeding of the Amur sleeper Perccottus glenii in a pond located in the southern taiga subzone in West Siberia obtained in May–October 2017 are presented....     

Belica Leucaspius delineatus (Cyprinidae) in waterbodies of southwest Siberia

We analyze Distribution and habitats of the belica (Leucaspius delineatus), a species accidentally introduced to waterbodies of southwest Siberia. The northern limits of the range of this species in the region are determined. Data are given on the sex ratios, size and age structure, growth, feeding, fecundity, and time and conditions of spawning of the belica in waterbodies of different types. It is shown that males of the earlier age groups are prevalent in belica populations.     

Spatial organization of the spawning grounds of cyprinidae and the regulated flow of the Upper Ob

The study of Cyprinidae in the Novosibirsk Reservoir in periods of high, medium, and low water content demonstrated a high degree of dependence of the numbers of generations of aboriginal fish species on conditions of water level regulation in the spring period. A drastic water discharge via hydraulic structures leads to drying of spawning grounds and mass loss of eggs. The acclimatized species—bream Abramis brama—reproduces at deeper water sites of the water area, which determines its high numbers and domination in the structure of the fish community from the water body.     

Spatial Heterogeneity and Biogeographical Division of the Ichthyofauna of Northern Eurasia

A biogeographical division of northern Eurasia (within the USSR borders as of 1991) based on cluster analysis of the cyclostome and fish fauna composition at 597 sites listed in the Biodat database has been performed. The classification based on the Jaccard similarity coefficients included two regions, 12 subregions, eight provinces, and 11 districts. The division performed explained 67% of the variance of the similarity coefficients, this being 21% higher than the respective value for an earlier scheme (Berg, 1962) that covered a significantly greater territory. Correlation with the climatic regimes and environmental factors identified could explain 82% of fish fauna heterogeneity (the multiple coefficient of correlation was 0.91). The nonorthogonal relations with the temperature regime (67% of the variance of similarity coefficients), landscape and climatic zoning (58%), location within a specific river basin (57%), and provinciality (30%) were the most important factors.     

Fish in the tributaries of the Novosibirsk reservoir

Data on the species composition of the fish population inhabiting the tributaries of the Novosibirsk reservoir are given in the article. The structure of fish communities and possible environmental factors determining it have been revealed. The relation between the heterogeneity of fish communities and the river depth and length, relief, current velocity, floodplain, and estuarial areas, presence of sand-pebble shallow waters and channel order, has been studied.     

The Siberian Dace Leuciscus baicalensis in Watercourses of Different Order of the Middle Ob Basin and its Role in Opisthorchiasis Circulation

Journal of Ichthyology - The results of the comparative analysis of the size, age and sex composition of the Siberian dace Leuciscus baicalensis from the rivers of the Middle Ob basin (Basandaika...