Environmental problems caused by aquaculture
- Organic wastes: deoxygenation, nutrient enrichment, increased turbidity
- Escapes: effect on wild gene pool-farmed gene pool may iclude undesirable characterstics e.g. bright colour causing vulnerability to predtion. Non-native species may compete with native species e.g. signal crayfish in the UK.
- Lice: may spread disease from farmed fish to wild fish
- Use of pesticides: may cause local pollution
- Loss of habitat/biodiversity: where fish farms are constructed, pollution may kill predators e,g, seals, herons, cormorants, otters
- Impact on tourism: where large-scale operations affect the scenery
- Coastal erosion caused by mangrove loss: where mangrove forests are destroyed to build farms e.g. tropical shrimp farms
- Effect of harvesting wild fish populations to provide food: e.g. overfishing of sandeels has reduced seabird survival.
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