Aquaculture >
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| photo: Katherine Bostick |
Fish farms often use a method of predator control to deter, primarily bird species, from destroying their stocks. Many methods have been used from scare tactics such as machines producing loud sounds, to the killing of these species by gun. At this salmon farm in Chile, netting is used to cover the cage surface and provides a non-lethal form of predator control.
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| photo: Aaron McNevin |
Some large producers choose to discharge their effluents into man-made wetlands, which help assimilate the wastes from the production activity. At this tilapia farm in Costa Rica large wetlands have been constructed to capture effluent from culture activities.
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| photo: Mike Phillips |
In many Asian countries fish are grown in cages in natural water bodies. Typically, there are fewer regulatory issues associated with producing in the ocean as compared to on land due to ownership issues. However, these fish are exposed to the pollutants that are present in natural waters and can accumulate in edible fish flesh. Here, fish cages are crowded into a cove in the Saguling reservoir, West Java, Indonesia.
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| photo: Aaron McNevin |
In aquaculture, as with many industries, the social welfare of workers has arisen as an important issue In some aquaculture facilities employees are treated in an unjust manner. However, companies are increasingly recognizing that good labor practices can improve worker well-being, increase productivity, and decrease turn-over, ultimately increasing profits. At this tilapia farm in Ecuador, the processing plant workers are given breaks, work reasonable hours, and afforded the safety equipment and training necessary for their jobs.
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| photo: Network of Aquaculture Centres in Asia-Pacific |
The use of plastic liners in shrimp ponds reduces erosion of pond banks and the leaching of acid-sulphate soils.
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| photo: Network of Aquaculture Centres in Asia-Pacific |
A shrimp farmer checks water quality to maintain healthy pond conditions.
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| photo: Aaron McNevin |
Early evening feeding at a shrimp farm in Madagascar.
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| photo: Claude Boyd |
Sediment removal from a research pond in Thailand. Soft sediment interferes with pond management procedures.
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| photo: Claude Boyd |
High density brackish water ponds in the Philippines. The close proximity of ponds makes it very difficult to control water movement, thus intake water is often mixed with effluent water of poorer quality.
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| photo: Aaron McNevin |
Overflow structure in a pond in Alabama. Note the water level is maintained well below the top of the standpipe to prevent excessive discharge during periods of high rainfall.
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| photo: Aaron McNevin |
Mechanical aeration in a catfish pond in Alabama. Mechanical aeration greatly increases the capacity of a pond to assimilate waste.
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| photo: Aaron McNevin |
Feed storage bins at a channel catfish farm in Alabama. Storage in these bins helps maintain the quality of the feed pellets.
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| photo: Claude Boyd |
Shrimp pond construction in Ecuador in 1985. Such mangrove areas are not suitable for ponds because of poor soil quality and drainage characteristics. Mangroves serve important ecosystem functions, and their destruction degrades the environment. Though common practice in the past, the construction of shrimp ponds in mangrove ecosystems has greatly decreased.
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| photo: Claude Boyd |
Harvesting a shrimp pond in Thailand. Note the center of the pond which accumulates sediment because of circular water flow caused by aeration.
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| photo: Claude Boyd |
A soil core section from the site of a shrimp pond in Columbia. This soil has high organic matter content, and high BOD making it unsuitable for pond embankment construction
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| photo: Aaron McNevin |
A multi-variable probe and anemometer used in a coastal water quality monitoring program in Madagascar.
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| photo: Aaron McNevin |
An inland shrimp farmer in Alabama shows a sample of his harvest.
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| photo: Aaron McNevin |
Water discharge structure in a shrimp pond used for water exchange and draining. Water exchange should be reduced as much as feasible to prevent excessive discharge of nutrients, organic matter, and pathogens.
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| photo: Aaron McNevin |
Mechanical aeration of an inland shrimp pond with inexpensive Asian aerators. These aerators are inefficient.
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| photo: Aaron McNevin |
Shrimp trawler designed for use in an Alabama inland shrimp pond. The use of this device negates the need to drain the pond thereby reducing the risk of salinization of surrounding soils and receiving waters.
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| photo: Aaron McNevin |
A shrimp pond in Madagascar.
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| Updates |
| Technical Working Groups to Develop Draft Standards for Pangasius Aquaculture April, 2008 |
| Impacts of Salmon Aquaculture Top Agenda at Dialogue Meeting in Barcelona February, 2008 |
| Impacts of Salmon Aquaculture Top Agenda at Dialogue Meeting in Chile Decemeber, 2007 |
| Wild Salmon Illegally Caught in Russia and Shipped to the U.S. November, 2007 |
| EPA Awards $210,000 Grant October, 2007 |
| Mollusc Industry Representatives Move Forward with Aquaculture Certification October, 2007 |
| Process for Certifying Pangasius Aquaculture Products is Underway October, 2007 |
| WWF teams up with national park in Vietnam to secure marine biodiversity October, 2007 |
| Tilapia Aquaculture Dialogue Makes its Debut in Asia September, 2007 |
| Standards for Certifying Mollusc Aquaculture Products Moving Forward August, 2007 |
| WWF Kicks Off Process for Certifying Pangasius Aquaculture Products August, 2007 |
| Standards for Certifying Tilapia Aquaculture Products Moving Forward August, 2007 |
| Twenty-Six Year Veteran of Aquaculture Industry Joins WWF Team August, 2007 |
| WWF Report Prompts Chilean Salmon Farming Reforms June, 2007 |
| Leading palm oil producers commit to responsible agricultural management June, 2007 |
| Major Companies Buying Coffee Illegally Grown in Tiger, Rhino and Elephant Habitat Jan. 17, 2007 |
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