Stress and comfortable conditions for fish population development
2008
Lyushvin, P.V., INFOMAR Co LTD, Moskow (Russian Federation)
Generation productivity and viability of young and old fishes are determined by a complex of biotic and abiotic factors. In waters where natural changeability of biotic factors does not exceed physiological limits of hydrobionts (for example, in Brazil), jumps in fish and crustacea catches do not occur. In waters where lithosphere fluids emissions are rather frequent, many fish, that are subjected to hypoxia die during periods of seismic activity. Others scatter for some weeks (till 1.5 month) depending on mixing intensivity and leave the area or they go to the liquid environmental borders (temperature or salt fronts, water depth). The next reproductive periods are not efficient, because reoroductive svstem of survived fish is damaged. Mollusk biomass declines regardless of conditions and crustacean stock increases. It is recommended to do social questioning about weather conditions among the local population and to determine O2, H and Rn content in water
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