A USDA scientist is using a “see-saw” to find new ways to enhance farm-raised catfish production. Les Torrans, a fish biologist with the USDA Agricultural Research Service, discovered the precise amount of oxygen levels needed to affect catfish egg development and hatching. With that knowledge he built a vertical-lift egg incubator, or see-saw, that provides a mix of dissolved oxygen to boost hatching rates. Learn more.
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