ARRANGEMENT OF SPAWNING REDDS IN POND WITH BIOPLATO STREAM FOR BREEDING RIVER TROUT FRY Russian patent published in 2024 - IPC A01K61/17 

FIELD: fish farming.

SUBSTANCE: invention relates to artificial fish breeding and can be used for reproduction of river trout stocks. Device contains three-layer spawning redds, the first layer of which is made of river pebbles, the second layer is made of light fascines forming a nest for laying and incubation of river trout spawn, the third layer is made of large river pebbles. Spawning redds are located in a pond arranged near a mountain stream, with which the pond is connected by supply and discharge channels. Supply channel is made in the form of a bioplateau stream filled with gravel with gravel and planted with reeds, reed mace, iris and other higher aquatic plants, which provide purification of river water entering the pond. Three-layer spawning redds are erected at the bottom of the pond at a distance from each other. Between the redds and on the coastal slopes of the pond, higher aquatic plants are planted. Transparent plastic bottle with a wide neck is used to fill the redds with fertilized eggs.

EFFECT: invention provides higher survival rate of river trout fry.

2 cl, 5 dwg