impact of aquaculture on environment

1. IMPACT OF AQUACULTURE ON ENVIRONMENT
B y S o m n a t h K K a m b l e

2. CONTENT
01 Introduction
02 Impacts on
environment
03 Management
strategy
04 Conclusion

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Aquaculture
Aquaculture is the farming of aquatic
organisms such as fish, shellfish and
even plants. The term aquaculture
refers to the cultivation of both marine
and freshwater species and can range
from land-based to open-ocean
production.

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• Can fish cultivation or
farming Effect
environment ??
Really

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• Increase in seafood
demand due to:
1. Increased global
population
2. Increased per capita
consumption
• Increased seafood demand must be met
with increase in cultured seafood
• Rapid industry growth = environmental
concern?
INCREASED AQUACULTURE PRODUCTION

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• Effluents: refers to either a continuous or intermittent
discharge of a liquid from an aquaculture facility
• Effluent composition
Dissolved compounds
1. Phosphorus
2. Nitrogen
• Sludge
Fecal material and uneaten feed

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Phosphorus and Nitroge
• Cause eutrophication
• algal blooms
• Kills fish and other benthic organism
• alterations in food chains
• removal of oxygen
Organic matter
• Increased BOD
• Decreases DO in water column and
sediment
sludge
Dissolved Compounds

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Destruction of Habitat for Aquacultural activities:
• The creation of ponds for marine shrimp aquaculturehas led to the destruction of
thousands of hectares of mangroves and coastal wetlands.
• Mangroves provide nursery grounds for many species,including commercially
important fish, and their destruction may lead to substantial losses for commercial
fisheries.

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Collectingwild Juveniles as Stock
• Aquacultureof some species relies on juvenile fishor
shellfishbeing caughtfrom thewild to supply stock
rather thanusinghatcheries to rear them.Shrimp farms
in manyareas rely on wild caught juveniles.

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Introduction of unwanted non-native species to natural ecosystems
- alter species composition
- reduce biodiversity
- introduce diseases and parasites

11. Influence on planktons and bottom dwellers
• The input of outside-source materials and organic matters can increase the
productivity of the planktons.
• Feeds make the nutrient matters in waters to gradually increase, and the
phytoplankton propagated largely grown but as time goes on and the continual
expansion of aquaculture is still on a large scale, the nutrient matters input
increases to a point the water quality deteriorates, so the amount of
phytoplanktonwill begin to reduce

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• Escaped domestic fish and ecosystem
health
• The influence on the ecological environment
• Weak environment protection consciousness
• Metal Concentration
• Sedimentation

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Management Strategies
• Goal: Reduce environmental
impact of aquaculture without
decreasing production
• Funding for research
• Encourage communication
between researchers and
commercial facilities via
conferences and meetings
• Educate Farmers

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• Aquaculture facilities constructed without environmental
protection in mind can cause serious environmental degradation
• A variety of strategies and technologies are now available to
make fish farming environmentally sound
• The use of these strategies can make aquaculture more
acceptable by the wider public and more productive
Conclusion

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References
• Aquaculture and the
environment by T V R PILLAY

16. Thank
you