Notes

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Outline

1	Low-input Shrimp Farming
2	Intensive Shrimp Production High stocking densities: 16-24 thousand pL/ac Aeration Pond-side electricity Substrate
3	Reduce Inputs Low stocking density No aeration Daily feeding capped at 25 lb/ac
4	Fertilized Recreational Ponds 400 to 600 lb fish/ac Not aerated
5	Alfalfa as Fertilizer Alfalfa: 17% protein & 27% fiber Alfalfa meal or pellets
6	Low-input Shrimp Demonstration 2002 Shrimp stocked June 13, 2002 8,000 pL/ac Harvested approx. 400 lb/ac Grow-out period: 107 days
7	14 Days Before Stocking Spread 250 lb alfalfa/ac evenly
8	Feeding Begin 24 hr after stocking Start at 10 lb/ac daily Cap at 25 lb/ac daily Use tables
9	Location & Pond Size
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11	Shrimp Harvest Data 2002
12	Low-input Demonstrations 2003 Stocked May 26 4 ponds (2.75 ac) 8,000 & 10,000 PLs/ac Harvested September 13, 19, & 27
13	14 Days Before Stocking Spread 250 lb alfalfa/ac evenly (pellets) Dissolved 9 lb/ac triple super phosphate (0:46:0) With history of dense blooms, did not use 0:46:0
14	Fertilization with Alfalfa & 0:46:0 (NPK)
15	Location, Pond Size, Growth Period -- 2003
16	Shrimp Harvest Data 2003
17	Shrimp Harvest Data 2003
18	Water Quality for 2002 & 2003 At or better than acceptable levels
19	Aeration vs. No Aeration 2003
20	Quality of Post Larvae (?) 0.25-g pL Size uniformity Stress … health … survival Cold weather May/June 2003
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22	Survival and Harvest Yield 2 densities (pL/ac); 13 count
23	Count and Harvest Yield 2 densities (pL/ac), 55 % survival
24	Stocking Density and Yield (55 % Survival; 13 Count)
25	Improving Harvest Yield
26	Demonstration Comparisons 2002 8,000 pL/ac 59 (64)% survival 364 (400) lb/ac 107 days 0.5-g juveniles June – warm 2003 10,000 pL/ac 55-56 % survival 326-348 lb/ac 116-124 days 0.25-g juveniles May/June -- cold
27	Increasing Yield Large shrimp = more lb/ac and higher $/lb Higher stocking density = more lb/ac but can lead to smaller shrimp Survival is “unpredictable”
28	Larger Shrimp / Harvest? Larger juvenile > 3.0 g Uniform pL size distribution Stock 10,000 pL/ac
29	Changes for 2004 Try capping feed at 20 lb/ac = 4 % of weight X 500 lb shrimp/ac Use 0:46:0 (triple super phosphate) with alfalfa to establish phytoplankton Stock 10,000 pL/ac
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