Which method is typically used to control fish populations in contained waters?

Seining is a commonly used method for controlling fish populations in contained waters. This technique involves using a seine net, which is a type of fishing net, to catch fish in a specific area. Seining is effective because it allows for the selective removal of fish, which can help manage populations that may be overabundant or causing ecological imbalances.

This method can also target specific species, which is crucial for ecological management. For instance, it can help control invasive species that threaten native fish, thereby restoring the natural balance in the aquatic ecosystem. Additionally, seining can provide a way to assess the health and diversity of fish populations before making more extensive management decisions.

Other methods, while they might be effective for different objectives or contexts, do not specifically target fish populations in the same direct way. Dredging is primarily aimed at sediment removal rather than fish control, the installation of barriers is usually focused on preventing fish movement rather than directly managing populations, and chasing with boats can disturb fish but does not provide a means for effective population control.