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Aquaculture Biosecurity: Predator Control and Weed Management | Disease Prevention

Learn principles of aquaculture, from predator control to aquatic weed management. Explore methods to prevent unwanted predators like birds, fish, frogs, and reptiles. Discover strategies for disease prevention and aquatic weed management.

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Aquaculture Biosecurity: Predator Control and Weed Management | Disease Prevention

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  1. PRINCIPLES OF AQUACULTURE(AKU3201)20May 2012 Biosecurity & predator control

  2. Unwanted predators • Bird • Wild fish • Frogs • Reptiles (snakes, turtle, alligators)

  3. Birds

  4. Crabs - marine

  5. Aquatic weed • Filamentous algae/scum • Floating weed • Emergent weed • Submerged weed • Marginal weed

  6. Water lily

  7. Hydrilla

  8. Duckweed

  9. Prevention of aquatic weeds • Avoid shallow pond. Why? • Use grass carp • Proper fertilization to establish phytoplankton bloom • Manual harvesting • Herbicides

  10. Factors causing disease 1) Stress e.g., physical injury 2) Pathogen 3) Environment e.g., pollution 4) Sometimes nutrition Disease Disease agent Env. Fish

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