Upload
john-blue
View
165
Download
0
Tags:
Embed Size (px)
DESCRIPTION
Current Status of U.S. Aquaculture Research - Dr. Jeff Silverstein, National Program Leader, Aquaculture, USDA-Agricultural Research Service, from the 2013 NIAA Merging Values and Technology conference, April 15-17, 2013, Louisville, KY, USA. More presentations at http://www.trufflemedia.com/agmedia/conference/2013-niaa-merging-values-and-technology
Citation preview
S
NIAA 2013 Annual Conference Aquatic Livestock Committee
Current Status of U.S. Aquaculture
Research
Jeffrey Silverstein, PhD USDA-Agricultural Research Service National Program Leader, Aquaculture [email protected] 301-504-5925
Capture and Aquaculture Production
FAO 2012
S
Do we need aquaculture research in
the United States?
Aquaculture
S Extremely efficient animal protein production system-(Conservation International 2011)
S High in protein, healthful omega3 fatty acids, essential vitamins and minerals
S Create jobs in coastal communities and agricultural heartland
US Seafood Trade Deficit 1977 - $2B; 2011 - $10.4B
Over 86% of our seafood is imported
Chamberlain 2011
Key Elements of Research System
S Resources S Human S Financial Academia, Government, Industry, Farmers, NGOs
S Idea development and application S Fundamental S Applied S Problem Solving
S Transfer and extension
S Integration across these domains
ARS Locations =
Auburn, AL
Stuttgart, AR
Oxford and Stoneville MS
New Orleans, LA
Leetown, WV
Hagerman, ID& Aberdeen, ID
Newport, OR
Franklin, ME
Milwaukee, WI
Regional Aquaculture Centers (RACs)= ¶
¶
¶
¶
¶
¶
=O
O
O
O
O
O
Federal Aquaculture Research
Private and NGO driven Valella Project
Hubbs Sea World
Mote Marine Lab
USB, QSSBs, SAA
Resource constrained Do more with less Do less-better
• Focus on key problems • Concentrate resources
• Push success
• Integrate across domains-multi-disciplinary, multi-institutional, multi-stakeholder
Integration
Key Production Challenges under research
S Reduce costs of production S Faster growth S Lower feed costs S Better control of reproduction
S Reduce loss to disease
S Improve production systems
S Generate product variety
Bright Spots in US Aquaculture-with a role for research
S Molluscan Shellfish
S Salmon
S Catfish
S Marine fish*
S Recirculating systems
S Feeds development
S Broodstock (genetic) development-build on terrestrial experience
Ingredient Evaluation; Nutritional and Economic Value
1) Compositional analysis • Nutrients; protein, energy, amino acids, fatty acids, etc. • Anti-nutrients; evolved in a protective or developmental role
2) Palatability; Effect on feed intake 3) Digestibility; Apparent Digestibility Coefficients 4) Functionality; durability, expansion, oil absorption, water stability 5) Growth; gain, FCR, fecal prod. product quality laboratory, pilot scale, 3rd party, production scale
Duniella Winter crop Oil source
Spirulina Summer crop Protein source
Effect of base formula and added spirulina meal on growth of white sea bass; 8 weeks
0
50
100
150
200
250
300
350
0 10 20 30 0 10 20 30 MGFish meal base Fish meal Free
% g
ain
from
initi
al
Skretting
Hubb’s Sea World Research Institute
Effect of base formula and added spirulina meal on survival of white sea bass; 8 weeks
0102030405060708090100
0 10% 20% 30% 0 10% 20% 30% MGFish meal base Fish meal Free
Sur
viva
l, %
Skretting
Hubb’s Sea World Research Institute
Improved Genetic Lines of Soybeans;
Soybeans; Lipoxygenase High protein Lectins, mg/kg Oligosaccharides; Stachyose, Raffinose Trypsin Inhibitor Activity, mg/g Phytate P34 allergen
All non-GMO
USB-Aquaculture Coalition Meeting Alternative Ingredients for Aquafeeds
Summary and Conclusions
- High value alternatives are being developed and are currently available for testing or production. - All characteristics of alternative ingredients must be considered to determine nutritional/economic value.
Thad Cochran National Warmwater Aquaculture Center
A multi-disciplinary, research and extension program for warmwater
aquaculture
Mississippi State University Agricultural Experiment Station College of Veterinary Medicine
Extension Service
United States Department of Agriculture
Craig Tucker Les Torrans Brian Bosworth Nagaraj Chatakondi
US Farm-Raised Catfish Production
Catfish Production Problems S Competition
S Feed costs
S Fuel costs
S High Mortality
S Long production cycles
S Poor Feed Conversion
S
Production of hybrid (blue x channel) catfish- <10 million in 2003 to over 150 million in 2012
Catfish Genetics Research Unit Stoneville, Mississippi
Blue
Hybrid
Channel
Advantages : Increased growth rate Lower feed conversion Be6er Survival Improved disease resistance Be6er tolerance of low DO Disadvantages: Produc?on is labor intensive
Oxygen and Feed
1 2 3 4
20
40
60
80
100
Average minimum dissolved oxygen (ppm)
Rel
ativ
e Fe
ed C
onsu
mpt
ion
(%)
5
Data from Les Torran’s pond studies
ü Higher D.O. in morning
ü More feed consumed
ü Higher net production
ü Less tractor use for emergency aeration
ü Less electricity use for routine aeration
New aerator placement strategy could reduce aeration costs by 15-20%
2.6
1.2
2.2 0.3
0.2
0.1
0.1
5-acre conventional pond
wastes pumped out
oxygen pumped in
3.9
4.8
3.7
4.4
4.5
Split-Pond Technology
Tucker et al. 2012
Return flow
Paddlewheel pump
Fish side Waste side
Aerators
Commercial-Scale Split-Pond
Fish weight (lb/fish) Initial Final Survival Harvest (lb/ac) FCR
Hybrid catfish stockers, 10,000 per acre 0.11 1.78 98% 17,700 1.83 0.12 1.70 90% 14,900 1.85 0.09 1.73 89% 15,500 1.78
Hybrid catfish stockers, 15,000 per acre
0.10 1.61 91% 21,100 1.80
• Hybrid Fish
• Oxygen levels- Better aeration strategy (grow fish rather than keep alive) Easier to maintain in split ponds
• Feeding- Better feeding by hybrid catfish, fish not scattered over large area
• Fish Health-Hybrid more resistant, easier to treat in split pond
• Harvest-Smaller area, more efficient in split pond
• Predators-Smaller area to protect in split ponds
All work done in conjunction with producers-step by step to integrate into improved system
Integrated Solutions
• There is a critical role for research in aquaculture development in the United States
• Focus on a few key industries, technologies adaptable across species
• Integration of research through extension and working with farmers is essential-no silver bullets
USDA (ARS-NIFA) Stakeholder Meetings upcoming Summer 2013-plan joint with NOAA Joint Subcommittee for Aquaculture, National Aquaculture Strategic Research Plan due out in 2013
31
Thank you!
Vegetable Oil to Fish Oil
• Fish oil (EPA, 20:5 n-3/DHA, 22:6 n-3) mainly derived from marine algae, in fish through feed
• Dietary requirement for fish not well defined
• May be variation between fish in ability to convert linoleic (18:2 n-6) to EPA and DHA
• 44 full-sib families evaluated after 70 days of feeding diet high in vegetable oil (13%), low in fish oil (1.5%)
Overturf et al., Aquaculture 2013
Difference in FA conversion and deposition
S Significant differences between families in deposition of EPA and DHA
S Highly heritable (can modify through selective breeding)
c b
a
b
b
a
0
1
2
3
4
5
6
7
8
Low Medium High
%
TFA
Relative fatty acid level of families
% TFA EPA
% TFA DHA