Among the most difficult habitats to sample are large river rapids. One effective technique is cast-netting. Lead weights surround the perimeter of the circular cast net. They quickly sink to the bottom when thrown, trapping swift-water fishes like Leporellus vittatus and Leporinus fasciatus, two colorful members of the family Anostomidae.


  • Title: Cast-netting
  • Creator: Mark Sabaj Perez/ANS

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