FISH HATCHERY AND METHOD FOR AIR SUPPLY AND WATER CIRCULATION IN FISH HATCHERY

摘要

FIELD: fish farming.;SUBSTANCE: fish hatchery (10) includes floating hoop (12) with net (14), wherein the upper section of net (14) is closed by gate (16) against lice that passes partially downward along net (14). A method includes stages, at which compressed air is supplied to the lower part of net (14), ascending water flow is formed of air bubbles (30) and water from net (14), as well as water sucked into net (14) from the surrounding sea, wherein water is sucked in net (14) from the surrounding sea in a passage section under gate (16) against lice. The supply of compressed air to the lower part of net (14) is carried out in a section adjacent to lower ring (22) and remote from the center of net (14). Water release to the surrounding sea is carried out in a section above gate (16) against lice, wherein water is released to the surrounding sea through slit (20) between gate (16) against lice and floating hoop (12).;EFFECT: group of inventions provides for the prevention of louse penetration to fish hatchery.;17 cl, 3 dwg