We delineated four fish assemblages on the Canadian Beaufort Shelf and slope.
Until now, continental shelf environments have been monitored with highly localized line-transect methods from slow-moving research vessels. These methods significantly undersample fish populations in time and space, leaving an incomplete and ambiguous record of abundance and behavior. We show that fish populations in continental shelf environments can be instantaneously imaged over thousands of square kilometers and continuously monitored by a remote sensing technique in which the ocean acts as an acoustic waveguide. The technique has revealed the instantaneous horizontal structural characteristics and volatile short-term behavior of very large fish shoals, containing tens of millions of fish and stretching for many kilometers.
EPA issued the Action Memorandum for institutional controls in September 2000 and it can be downloaded from Region 9's web page. The web address is and is called "Region09: Cleaning up the Palos Verdes Shelf."
The institutional controls program has three major elements: public outreach and education, fish monitoring, and enforcement. The public outreach and education program is being implemented by EPA in collaboration with several federal, state and local agencies, environmental groups and community-based organizations. To facilitate coordination and cooperation among these entities, EPA created Fish Contamination Education Collaborative, which guides the implementation of EPA's PV Shelf programs. EPA and its key stakeholders have been carrying out strategic planning of the Palos Verdes Shelf Institutional Controls Program since 2004. For more information on the Fish Contamination Education Collaborative is available on The fish monitoring program involves sampling both fish in the ocean and fish in retail markets. The MSRP and EPA completed the ocean fish sampling program in July 2007. EPA utilized the data to update the risk assessments for the site. EPA and the public are currently awaiting the State of California to update the existing fish advisory based on the recent data. EPA continues to monitor white croakers at local markets since 2004. Finally, California Department of Fish and Game and local county health departments are carrying out enforcement and education activities under partnership with EPA, including marketplace inspection and white croaker recreational fishing bag limit and white croaker commercial catch ban inspection.
Public Outreach and Education Program (Fish Contamination Education Collaborative ) Update
EPA established the Fish Contamination Education Collaborative (FCEC) to educate the public on the health risks posed by chemically contaminated fish and to encourage the public to adopt safer fish consumption practices.
The cornerstone of the FCEC is the partnership between federal and state government agencies, local health departments, community based organizations, and other local institutions. The goal of the program is to conduct education for the most affected populations, so they can make informed decisions about fish contamination issues. The outreach efforts have been conducted in English, Spanish, Cambodian, Chinese, Filipino, Korean, Vietnamese, Chamorro, Samoan, Marshallese and Tongan.
The current program focus is to measure risk reduction through the ICs program implementation. EPA, with assistance from all stakeholders, put together a road map for the Institutional Controls Program which outlines the numeric objectives and associated strategies and tactics for the program. The document is available at .
Local shelf fish - Picture of Alabote, Ribeira Grande - TripAdvisor
Fish - How Long Does Fish Last? Shelf Life Storage Expiration
After a long decline that began in the 1960s, the great fisheries of Newfoundland collapsed, and since 1992 a moratorium has applied to most stocks from Labrador to the U.S. border. Cold water temperatures and other environmental factors have been suggested as the underlying cause of the observed declines, but the data now emerging show that overfishing has been the prime agent. Study of scientific survey data for the years 1978–1993 shows that all species, commercial and non-commercial, in the fish community have undergone changes. Numbers and biomass decreased and for both target and non-target species mean size in the 90's has dropped dramatically from what it was in the early 80's. The decline in size results from the removal of the larger (and presumably older) individuals with the result that the population structure has been fundamentally changed. The trend of decreasing mean size over time is not an isolated occurrence on the Northeast Newfoundland and Labrador shelf, but is also observed in the groundfish community off west Greenland during a similar time period.It has been shown that specific fish and benthic habitat associations exist, and that these habitat associations can change throughout fishes life histories , . More detailed information on fish and fish-habitat relationships will help develop more robust species distribution models , . This will help inform management decisions, such as the design of MPA's to protect entire life history of species and further assist fisheries and conservation planning and management. Two parameters known to explain a large proportion of variability in fish assemblages are depth and habitat, yet very few studies of fish assemblages encompass both shallow and deeper continental shelf habitats .