Method and apparatus for attracting aquatic animals

Details Method and apparatus for attracting aquatic animals Method and apparatus for attracting aquatic animals

A - Human Necessities

01

K

43/21, 99/25

A01K 85/00 (2006.01) A01K 69/08 (2006.01) A01K 79/00 (2006.01) A01K 97/04 (2006.01) A23K 1/00 (2006.01)

Patent

CA 1149665

ABSTRACT A quantity of ammonium ion-producing compound, such as ammonium salt, is confined inside a container having an aperture or aperatures covered by a water permeable membrane. The container is placed under water at a desired location, and water passes into the container through the membranes so that the compound is dissolved. Ammonium ions are emitted from the container by diffusion through the membrane. The total area of the container aperture or apertures and the characteristics of the membrane are selected to control the release rate of ammonium ions for attracting aquatic animals to the vicinity of the container. A screen encircling the membrane reinforces it. A protective shroud may be spaced outward from the screen. The container can be formed by fitting a water permeable membrane sleeve and a reinforcing screen over an oblong block of the ammonium ion-producing compound and then covering the opposite end portions of the block with liquid resin, such as polyurethane material, and allowing such resin to set such that only a circumferential slit of screen and membrane is exposed.

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