News

Sampling UF Field Trials

A similar number of oysters provided to project participants were also cultured at the UF experimental lease off Cedar Key so that growth and survival could be documented bimonthly during growout. Oysters (ave 26 mm shell length) were stocked in 14 mm mesh bags in October (see previous post) and sampled in December 2016 and, again, in February 2017. Three bags from each of the density and ploidy combinations, a total of 18 bags, were sampled each period. These bags were supported with square floats; in addition, three bags supported with bullet floats were also sampled. Different replicate bags were

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Florida Sea Grant Shellfish Aquaculture Workshop

Florida Sea Grant developed a new 4-year strategic plan this spring. One of the areas covered in the FSG strategic plan is aquaculture. Not only is shellfish aquaculture an important business sector in Florida, it is unique in that there is a history of dedicated federal funding for research and extension. The aim of this workshop is to help Florida institutions acquire a substantial amount of these funds to use in solving the highest priority issues affecting the shellfish aquaculture industry. Industry members, researchers, and agency representatives can help FSG identify and prioritize these issues in greater detail than what

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Restoration of oyster reefs to enhance Oystercatcher habitat in Cedar Key

To address erosion of oyster reefs used seasonally by American Oystercatchers, the Shellfish Extension Program and Cedar Key Aquaculture Association worked with FWC biologists to apply previously demonstrated restoration techniques at Corrigan’s Reef and Gomez Key. Cedar Key is home to the largest population of wintering Oystercatchers in Florida. Oystercatchers roost on unwooded, high-tide sandbars and oyster reefs. This habit may help Oystercatchers distance themselves from predators associated with wooded areas, such as raccoons and birds of prey. Last summer, 1000 damaged clam bags removed from aquaculture leases were used as bulkhead material at these two sites. Limerock cobbles were

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Financial Characteristics and Risks

Another component of the Oyster Culture Demonstration Project is to document economic costs and benefits associated with diploid versus triploid oyster production along the west coast of Florida. To help collect cost and sales data, UF economists and a graduate student have partnered with oyster farmers to provide “real-world” estimates allowing for a better understanding of production methods, operational costs, and farm-gate revenues associated with growing the two ploidy types. Findings will be transferred into a financial spreadsheet that the user can adjust based on their unique farming and investment situation (e.g., farm size, # seed planted). To make this

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Red Tide Causes Economic Losses to Southwest Florida Industry

Red tide events are somewhat common to the Southwest (SW) Florida coastal environment. Evidence of such periodic red tides extends many years into the past. Fish kills and disrupted water-dependent activities have been the historic hallmarks of these events, but more recently … a new and growing industry has felt the impact of red tides. Commercial molluscan shellfish culture within the region is often closed, as are natural shellfish beds, when red tides occur within SW Florida. An extended red tide event occurred during the period from November 2015 through April 2016. The harvest of cultured shellfish (hard clams and

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Online Shellfish Training Program Available

The Roger Williams University Center for Economic and Environmental Development is now enrolling students for Applied Shellfish Farming, a non-credit course offered during the winter/spring semester that teaches both aspiring shellfish farmers and aquaculture professionals the ins and outs of commercially growing oysters, quahogs, scallops and mussels. The 14-week program, led by Dale Leavitt, aquaculture extension specialist and Professor of Marine Biology at Roger Williams University, is designed to aid new and experienced shellfish farmers to start or grow their shellfish farming enterprise in Rhode Island and other areas of Southern New England. Topics in the course include: an overview

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Dates set for Oyster South Symposium

The Oyster South Symposium (OSS) is being held by Oyster South, Inc. (a non-profit dedicated to advancing oyster aquaculture in the southern US), in collaboration with National Sea Grant, to bring together producers, gear suppliers, distributors, chefs, food writers, vendors, researchers, students and managers from the southeast region to discuss pressing issues and relevant, practical research on oyster aquaculture on January 27-28th, 2017 in Auburn, AL. Registration includes admission to all informational sessions (all day Friday and Saturday morning), all breaks, lunch on Friday, January 27th, the mixer on Friday night, and the trade show. Meeting fees are based on current

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UF/IFAS Researchers to Build Up Ecological ‘Resilience’ in Big Bend

In less than 30 years, 3,000-year-old oyster reefs off Florida’s Big Bend coastline have declined by 88 percent, according to UF/IFAS researchers. For residents who depend on the fishing grounds and other coastal resources protected by these reefs, it’s a worrying trend. Now, thanks to an award of up to $8.3 million from the National Fish and Wildlife Foundation’s  Gulf Environmental Benefit Fund, a UF/IFAS research team will work to restore these shrinking oyster reefs and help coastal ecosystems — and economies — become more resilient in the face of climate change and rising tides. “This grant is one more

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Oysters

UF Oyster Growout Study Initiated

The following graphs summarize the growth (shell height and total weight) of diploid (2N) and triploid (3N) oysters cultured in 9 mm mesh floating bags at the UF experimental lease within the Dog Island Lease Area near Cedar Key over a nine-week period (August 4 – October 6, 2016). Details during this culture period can be found in prior news articles. Oysters grown in the 9 mm bags were used to stock replicated field trials to continue to evaluate ploidy types (triploid versus diploid), but also to evaluate the following management practices: Stocking densities of 125, 150, and 175 oysters

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Oyster Restoration Projects Use Clam Culture By-products

Offshore oyster reefs along the Big Bend coast of Florida have declined by 88% during the last 30 years, with the most likely mechanism being repeated die-offs due to predation and disease during high salinity periods, driven by episodic and increasing periods of reduced freshwater input to estuaries. These die-off events have led to a conversion from shell to sandbar substrate and rapid loss of elevation (about 3 inches per year). This process appears to be nonreversible, because oyster spat are unable to colonize sandy substrate. A pilot project conducted by University of Florida researchers and funded by grants from

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