METHOD OF WATER AERATION FOR FISH CONCENTRATION AND CATCHING

摘要

FIELD: fishery, in particular, rearing, wintering and catching of fish in underfeed lakes.;SUBSTANCE: method involves mounting aerator-flow former in basin; providing oxygen-saturated water flow and attracting fish into aeration zone, followed by catching of fish or keeping it in underfeed water area of basin up to the end of underfeed period; directing oxygen-saturated water flow to flow suppressor, which is made of open oval or other open shape allowing direction of mixing to be reversed. Intensive saturation of water with oxygen is provided by multiple reciprocation of one and the same volume of water from aerator-flow former to flow suppressor in flow suppression area of basin. Fish is concentrated, kept and caught in water area adjoining flow suppression area, where convection exchange of oxygen-saturated cold water of flow suppression area with warmer lake water occurs. Oxygen content in flow suppression water area and in water area of lake in aeration zone is regulated by changing width of open portion of flow suppression area.;EFFECT: reduced power consumption for water aeration and reliable keeping of fish in aeration zone.;2 cl, 3 dwg, 3 ex