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PREDATION

Predators are a part of all natural ecosystems and all fisheries will be subject to some predation. Coarse fishery managers should recognise that artificially high stock densities will inevitably be attractive to predators and that steps should be taken to minimise the impacts.

Do

• Reduce risks to stocks by ensuring that fish have cover in which to hide from predators. If necessary provide artificial refuges (deadwood, pipework, reefs and floating islands).
• Seek professional advice if excessive predation occurs.

Large numbers of fish may be caught during competitions, and it will be necessary for these to be retained for weighing. Frequent competitions will place significant angling pressure on the fish stocks.

Do insist on

• Separate keepnets for carp and silver/other fish.
• Careful playing and handling of fish.
• Good quality weighing nets - never allow mesh baskets to be used. Preferably provide your own.
• Landing & keep nets meeting agreed trade standards.
• Use of a net to land fish over ½ lb.

You should know and understand the exploitation rate for your fishery; this will influence how the fishery should be managed.

Do

• Calculate exploitation rates – average frequency of capture.
• Use stock density, angler visits and average catches to do this.

MAINTENANCE OF WATER QUALITY, STOCKING DENSITIES and FISH HEALTH