Patent ID: 6694920
Filing Date: 2004-02-24
Classification: A01K

Abstract:
A method of grading a plurality of fish by size, said method comprising the steps of:(a) providing a body of water with said plurality of fish therein; (b) providing a first grading pen within said body of water, said first grading pen having a first meshed fish grading screen at a boundary of said first grading pen, said first meshed fish grading screen having a certain first mesh opening size, said first meshed fish grading screen including selectively-openable first gate means for creating a first unmeshed opening within said first meshed fish grading screen; (c) training said plurality of fish to congregate at a source of a certain sound, said training comprising the step of providing fish food in proximity of said source on successive days while accompanying said providing of said fish food with said certain sound from said source so that said plurality of fish come to associate said source of said certain sound with said providing of said fish food; d) opening said first gate means so that said plurality of fish may enter into said first grading pen; (e) after said plurality of fish have been trained to associate said source with said providing of said fish food, locating said source within said first grading pen and then closing said first gate means after said plurality of fish have congregated at said source; then (f) allowing a portion of said plurality of fish to escape through said first meshed fish grading screen while said first gate means is closed.