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(Procedures for Start-up of Warm Water Aquaculture Ponds )Tj
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( Aquatic Vegetation Control )Tj
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(Proper preparation, filling, and fertilizing of )Tj
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(ponds should prevent aquatic weed problems. A )Tj
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(pre-filling application of herbicide such as Simazine )Tj
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(can prevent weed and algae growth. It also reduces )Tj
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(phytoplankton bloom development. A phytoplankton )Tj
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(bloom established in a pond will out-compete aquatic )Tj
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(weeds. If weeds become established, they will prevent )Tj
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(development of a satisfactory bloom. For small weed )Tj
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(infestations, manual removal is best. Once weeds are )Tj
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(removed, development of the phytoplankton bloom )Tj
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(will prevent their reestablishment. If extreme weed )Tj
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(problems develop, aquatic herbicides may be required )Tj
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(and the advice of a weed specialist should be )Tj
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(considered as to the type and amount of herbicide to )Tj
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(use. In aquaculture, the grass carp is often used for )Tj
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(biological weed control at densities dependent upon )Tj
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(the extent of weed infestation. For rapid control, grass )Tj
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(carp of about 8 to 12 inches in length should be )Tj
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(stocked at about 100 per acre. Larger carp can be )Tj
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(stocked at lower densities. As the grass carp control )Tj
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(the weeds, they should be removed as they will )Tj
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(compete with other fish for feed added to the pond. )Tj
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(The grass carp are not a threat to small fish in the )Tj
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(pond, although at harvest time, due to their large size, )Tj
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(they can physically damage small fish if confined in )Tj
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(the same net. A large mesh seine to remove the grass )Tj
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(carp fish solves this problem. Grass carp can be used )Tj
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(at densities as low as 1 to 2 per acre for maintenance )Tj
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(after weed control has been achieved. In states where )Tj
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(grass carp are legal, triploid \(sterile\) grass carp may )Tj
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(be required. The triploid grass carp can be used in )Tj
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(Florida with proper permits. Dealers who sell the fish )Tj
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(can usually supply you with a permit application, )Tj
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(which must be sent to the Florida Game and Fresh )Tj
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(Water Fish Commission. )Tj
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