| 摘要 |
A plurality of porous enclosures are provided to segregate groups of fish for testing and commercial purposes. The enclosure mesh is small enough to retain the fish, yet large enough to permit water flow. The enclosures are arranged circle fashion about a central shaft imbedded in the pond floor, and held in place between two concentric rings by a shaped support frame engaged at either end by the rings. A rotational sleeve sits about the shaft and is joined to the rings by spoke-like members, and flotation elements are provided for the ring-sleeve structure. The assembly is regularly rotated around the shaft, so that the fish within the different enclosures are kept segregated yet exposed to the same environment.
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