Oyster Boats on Apalachicola Bay Photo by Erik Lovestrand, UF/IFAS Franklin County Extension Director
A notice has been issued by the California Dept. of Public Health dated June 27 that is seeking public comment on a proposed rule change regarding the allowable level of microbial Vibrio vulnificus in post-harvest processed Gulf oysters.
Post-harvest processed oysters are regulated as raw, but have been subjected to a process to reduce levels of Vibrio vulnificus. The current rule states that levels must be less than 3 MPN/g (Most Probable Number/gram) whereas the proposed change would allow a critera of less than 30 MPN/g of Vibrio vulnificus. Restrictions regarding raw Gulf oysters harvested during April through October that have not undergone post-harvest processing to reduce Vibrio vulnificus will remain in place.
This change would bring California’s molluscan shellfish regulations into alignment with standards adopted by the National Shellfish Sanitation Program of the U.S Food and Drug Administration (FDA) and the Interstate Shellfish Sanitation Conference (ISSC). All other member states of the ISSC have already adopted the less than 30 MPN/g standard in post-harvest processed oysters.
This newer standard has been deemed safe since it has been in use from 2005 with no documented Vibrio vulnificus infections associated with raw oysters processed at the less than 30 MPN/g level according to FDA data. This change is anticipated to increase the amounts and varieties of post-harvest processed oysters imported into California from Gulf states.
If you would like to see materials regarding this action you may access them here. Inquiries about the proposed regulations may be directed to Pat Kennelly, Chief, Food and Drug Branch, Food Safety Section, at (916) 650-6598.
Article Author Contact:
Erik Lovestrand
UF/IFAS Franklin County Extension Director
Sea Grant Regional Specialized Agent II
653-9337
Worldwide, oysters and their habitats have declined in population. National concern over the reduced oyster populations and potential failure of the Oyster fishery in Apalachicola Bay have been recently featured in the news.
In September, Jack Payne, University of Florida IFAS Senior Vice President for Agriculture and Natural Resources announced the formation of the UF Oyster Recovery Task Force. This group, now called the UF Oyster Recovery Team, includes members from various stakeholders including scientists, industry, public health representatives and more. Florida Sea Grant is leading the team and director Karl Havens is the Chair.
“The recovery team has multiple priorities, including learning why oyster populations declined, finding ways to help them bounce back, and identifying solutions for social and economic impacts”, Havens said. A firm date has not been set for the recovery team’s final report, but the team is hoping to deliver some results to the community by early 2013.
Courtesy of Florida Sea Grant
Eastern oysters are more than just a tasty treat! They provide a variety of functions to the bays and estuaries. They are a staple to the health and wellness of our bay. These organisms are hearty and tolerant of a wide range of salinity conditions from fresh to full-strength seawater. However, they are most “happy” when they are living in brackish water (a mixture of fresh and salt water).
Oysters are considered an important keystone species because of the variety of functions they provide for the areas they inhabit. Considered biofilters, oysters have the ability to filter up to 24 gallons of water per day. They help to control algal blooms, lower the amount of suspended sediment, silt and nutrients, and improve water quality/clarity. Oysters also provide critical food and habitat by creating solid three dimensional structures, referred to as reefs in the areas they grow. This reef structure provides habitat to many other fish and invertebrate species that live in the estuary.
Historically, the oysters harvested from Apalachicola Bay represent approximately 10 percent of the U.S. oyster harvest and about 90 percent of Florida’s harvest. This oyster fishery is an icon of our state and many jobs are dependent on this industry. The future is uncertain. However, the members of the Oyster Recovery Team are hopeful that by working together, the oyster resources will rebound and that a sustainable oyster management plan will be in place to insure the future of this vital fishery.
To help with support of seafood workers and disaster relief efforts in Franklin County visit the BAYAID website or Franklinspromisecoalition.org
UF/IFAS scientists and UF Oyster Recovery Team Members, Bill Pine and Peter Frederick, have been studying oyster communities along the Big Bend of Florida and hope that by studying these un-impacted oyster beds, they can help restoration efforts in Gulf and around the world be more efficient and effective.
