Device and method for volitionally orienting fish

Details Device and method for volitionally orienting fish Device and method for volitionally orienting fish

A - Human Necessities

01

K

A01K 63/00 (2006.01) A01K 61/00 (2006.01)

Patent

CA 2189293

A device and method for volitionally orienting fish relies upon the instinctive reactions of fish in order to ensure that when the fish exit a containing vessel, they do so with a uniform anatomical orientation, such as head-first, dorsal-side-up. The containing vessel is partially filed with water and has at least one exit. A flow of water is generated away from the exit of the vessel, causing any fish that are introduced into the vessel to orient themselves head-first into the direction of the flow. In addition, an environment within the water of the vessel may be created that is disturbing to the fish, thereby causing the fish to want to exit the vessel. In order for the fish to exit the vessel, they must actively swim toward and through the exit opening. After the fish exit the vessel, they may then be subjected to any number of fish handling operations -- such as automated vaccinating, tagging/marking, sorting, and/or counting -- where it may be beneficial to have fish delivered to a given location at a high rate of speed and with a uniform orientation.

Dispositif et méthode pour l'auto-orientation des poissons, basés sur les réactions instinctives des poissons, de manière que, lorsque les poissons sortent d'un contenant, ils s'orientent anatomiquement de façon uniforme, par exemple la tête la première, la dorsale vers le haut. Le contenant est partiellement rempli d'eau et comporte au moins une sortie. Un courant d'eau créé à une certaine distance de la sortie du contenant provoque chez les poissons placés dans le contenant une réaction d'orientation tête première en direction de l'écoulement. De plus, on peut créer dans l'eau du contenant un milieu qui dérange les poissons et les incite à sortir du contenant. Pour que les poissons puissent sortir du contenant, ils doivent nager activement vers la sortie et passer par cette dernière. Une fois sortis du contenant, ils peuvent être soumis à toutes les opérations de manipulation souhaitées (vaccination automatique, étiquetage/marquage, tri, et (ou) dénombrement) aux endroits où il peut être utile de transférer très rapidement des poissions uniformément orientés.

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