Netting fish in aquaculture

This video consists of 4 video clips showing different aquaculture operations where fish are captured using nets. In the first clip, a carp broodstock pond is shown with lowered water level and significant turbidity in the water. A large seine net is being used with farm workers hauling the two ends onto the pond bank and a third worker standing in the pond guiding the net as the volume contained is reduced, to help avoid any fish escapes. The fish are not clearly visible in this clip.

The second clip shows giant travelly broodstock in wooden cages with oil-drum floats concentrated into a small section of one cage using a taught horizontal rope pulled below the cage net to reduce the volume and depth. Farm workers are using hand-held dip nets to capture and remove individual fish from the section where the fish are concentrated. The fish can be clearly seen and are actively swimming and struggling when captured.

The third clip shows a very similar scenario with large channel catfish concentrated within a small section of more substantial steel cages. They are tightly packed and very active, creating a lot of water splashing. We do not see any being removed, but it appears they are being selected and taken by hand.

The fourth clip shows sturgeon similarly concentrated with netting in a small section of a steel cage system. The fish appear much less active than in the previous two examples with some lying on their side. They are being sorted by hand, either being placed into a large plastic container, apparently without water, or released into the adjacent cage.