alternative oyster culture site and gear selection john supan, ph.d. la. sea grant college program...
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Alternative Oyster CultureSite and Gear Selection
John Supan, Ph.D.
La. Sea Grant College Program
LSU Agricultural Center
Governor’s Oyster Advisory Committee Meeting
June 27, 2013
New Orleans, Louisiana
Benefits of advanced culture technology
As with all business, site selection is the first and mostimportant decision to be made when selecting locations
foralternative oyster culture. The site and its characteristics(e.g., bottom type, water depth, salinity regime, etc.)
should dictate which culture system is used (e.g., raft, rack, cageor longline). As off-bottom oyster culture is developed in Louisiana and other gulf states, it is very important to foster
notonly entrepreneurial spirit and creative design, but also the useor development of culture systems that allow aerial drying ofoysters and their culture containers to help deter biofouling(e.g., barnacles, algae and wild oyster overset), to reducelabor costs associated with cleaning to improve economicfeasibility.
AOC Site Selection •Suitable oyster lease (per map) •Approved Shellfish Growing Waters
• management options• open for harvest
•Salinity regime• faster growth• flavor
•Bottom type• gear type & methods
•Water depth• gear type & methods• winter tides
•Fetch• exposure
Benefits of advanced culture technology
As with all business, site selection is the first and mostimportant decision to be made when selecting locations foralternative oyster culture. The site and its characteristics(e.g., bottom type, water depth, salinity regime, etc.) should dictate which culture system is used (e.g., raft, rack, cageor longline). As off-bottom oyster culture is developed in Louisiana and other gulf states, it is very important to
fosternot only entrepreneurial spirit and creative design, but
alsothe use or development of culture systems that allow
aerialdrying of oysters and their culture containers to help
deterbiofouling (e.g., barnacles, algae and wild oyster overset), to reduce labor costs associated with cleaning to improveeconomic feasibility.
Australian Adjustable Longline System
The ALS is a series of cylindrical meshbags suspended horizontally on a longline
Riser posts with clipsallow suspension oflongline at variousheights
The longline is anchoredby pilings and can followshoreline contour
The OysterGroTM floating oyster culture cages from Bouctouche Bay Industries Ltd., New Brunswick,Canada. Photograph is from the Chesapeake Oyster Company web site: http://www.bayoyster.com/equipgo.html
LoPro oyster cages from used commercially in Chesapeake Bay. Photograph is from the Chesapeake Oyster Company web site: http://www.bayoyster.com/equip_go.html
Marine Enterprise Zones
• Sited for Optimum Performance• Environmental
• Water quality• Biological
• Culture species• Engineering
• Hydrodynamics• Economics
• Logistics• Reduces User Conflict in Coastal Zone• Reduces Exposure to Liability
Park Administrator
• Obtains Coastal Use Permits
• Coast Guard Approval
• Manages Park Users
• Provides security & support
For more information, contact:
John Supan, Ph.D.Louisiana Sea Grant College ProgramLouisiana State UniversityBaton Rouge, LA [email protected]