Presentation is loading. Please wait.

Presentation is loading. Please wait.

Innovations and Georgia Aquaculture

Similar presentations

Presentation on theme: "Innovations and Georgia Aquaculture"— Presentation transcript:

1 Innovations and Georgia Aquaculture
Gary J. Burtle Animal & Dairy Science The University of Georgia

2 Hybrid Catfish Project
Interest in Hybrid Catfish is gaining ground in the Southeast U.S. Selling for 1.25 to 3.0 cents per inch depending on state and quantity Highest prices in Alabama Limited by fingerling availability

3 Spawning Hybrids Need 5 yr old blue males, 4-5 year old channel females Check females each week during spawning season and inject with carp pituitary Inject male blue catfish with carp pituitary and dissect testes for in vitro fertilization after female is stripped of eggs, 3-5 females per male Expect 3,000 to 4,000 fry per female

4 Hybridization Trial Results
50% of females will produce eggs by stripping after hormone injection Male blue catfish can be stimulated with urine from female blue catfish Harvest testes within 24 hours of stimulation, urine or hormone Maintain 78 degree water for best results

5 Hybrid Stocking Obtain hybrid fingerlings from hatcheries with disease control programs Have fingerlings inspected for disease prior to purchase Apply chelated copper rather than copper sulfate for hybrid ponds Stock 6,000 to 10,000 per acre 0.05 to 1.5 pounds in 5 months

6 Vietnamese Catfish Basa, Pangasius bacurti
Grown in cages on rice bran and dried fish Sold as frozen fillets From 7 million pounds in 2000 to over 20 million pounds in 2001 Illegal label until October 2001

7 Basa

8 Cage Culture of Basa

9 National Bill Sets Label Law
Introduced in House in early 2001 passed Senate in October Requires “catfish” to be from the family “Ictaluridae” and excludes “Siluridae” or “Pangasiidae”

10 Status of Imported Catfish Label
Basa fish sold as catfish perceived as illegal July 2001, Vietnam orders all basa labelled as product of Vietnam, Mekon catfish, basa catfish, or pangas catfish. October 2001, US Senate passes label law to require proper catfish labeling

11 Impact of Vietnamese Catfish
20 million pounds of fillets in 2001 23% of farm raised catfish fillet market 3% of US catfish market Competition at time of US economic recession Pond bank price below 50 cents per pound in Mississippi, 53 cents in Georgia

12 Fish Imports (1,000 lb) Sept 2000 2001 Jan-Sep Catfish Fillet 615
1,401 5,174 12,175 Tilapia Products 7,499 5,552 40,787 50,007

13 Cold Storage Holdings (1,000 lb) Down 8 to 13% since 2000
Catfish 12,906 11,873 13,337 Saltwater Total 278,085 240,879 240,713

14 Fresh Fish Prices at Fulton Market (Nov 30, 2001)
Catfish Fillet $ 2.75 /lb Cod Fillet $ 4.00 /lb ($2.00 frozen) Tilapia Fillet $ 3.90 /lb Hybrid Striped Bass Fillet

15 Tilapia Culture Several Recirculating Systems in Georgia
Some small hydroponics systems also in Georgia Processing in North Carolina by Southern States Cooperative Systems are in a mile radius of Valdosta

16 Economics of Tilapia Culture
Based on capital provided by others Must have land and positive net worth Must be identifiable as a farmer Approximately $20,000 net per year per system as a goal Only available through Southern States Cooperative

17 Freshwater Prawns Machrobrachium rosenbergii
An exotic shrimp from Malaysia Tropical Lives in freshwater for part of its life-cycle

18 U. S. Prawn Culture Of interest for over 25 years
Limited by the availability of seed stock Cultured in Texas, Kentucky, Mississippi, South Carolina, Tennessee, recently in Georgia Average production 500 to 800 pounds per acre. Maximum production about 2,500 lb/A.

19 Prawn Production in Ponds
Prepare pond for stocking Stock 10,000 to 30,000 juveniles per acre Fertilize for first 30 – 60 days Feed a sinking feed during months 2-4 Monitor and control oxygen and pH Use narrow ponds less than 2 acres in size Harvest before water falls below 60 degrees

20 Proper Sized Juvenile Prawns
60 day old, 95/oz 28-35 day old, 250 to 280 per oz Uniform size very important Careful handling and stocking are essential to juvenile survival Avoid overcrowding

21 Feeding Prawns Start with cottonseed meal and N-P-K
Use sinking catfish feed for 500 to 800 lb/A Use shrimp diet for higher yields Monitor zooplankton with net during first month Feed over entire pond area Estimate feed rate based on prawn samples

22 Water Quality in Prawn Ponds
Aerate continuously Keep oxygen above 3.0 ppm Monitor pH twice each day Flush with water to keep below 9.0 (Use pond water of low pH if possible) Add gypsum to lower pH, 1,000 to 2,000 lb/Acre added as needed

23 Harvest Procedure Seine most of prawns with water at 1/2 depth
Use 1/2 inch mesh seine, grade with bar grader, 62/64 width Consider partial harvest one month before end of season Final harvest requires pond draining

24 Economic Sketch Breakeven at 1,000 lb/A is about $5.00 per pound
Juveniles cost $1,500 to $3,000 per acre Feed costs $300 to $550 per acre Aeration costs $200 to $400 per acre Labor cost $800 to $1,200 per acre Variable cost total$2,800 to $5,100 per acre

25 Litopenaeus vannamei

26 Conditions for Culture
0.5 to 2.0 parts per thousand salinity Recirculated water or small, aerated ponds Establish bacterial food source as well as feeding an adequate sinking pellet Warm water temperatures would require indoor culture in Georgia Indoor culture may prevent disease outbreak

27 Current Status of Perry Project
Contact William MacGrath Georgia Marine Shrimp Project Looking for Cooperating Farmers for Phase 2 of project Economics available in next 12 to 24 months

Download ppt "Innovations and Georgia Aquaculture"

Similar presentations

Ads by Google