Periwinkle (Littorina Littorea) Surveys
Periwinkle gathering occurs both recreationally and commercially in the rocky intertidal areas of the NIFCA district. NIFCA monitor intertidal collection activity through routine shore patrols where all activity seen is recorded. From this information, areas of higher periwinkle collection intensity have been identified. These areas of higher collection are surveyed to understand impacts of collection pressure on the abundance and size of periwinkle, periwinkle size at maturity and impacts to the rocky shore communities.
Mussel (Mytilus Edulis) Surveys
NIFCA conduct surveys annually on intertidal mussel beds at Blyth Estuary, Fenham Flats and Holy Island to monitor the health of the mussel bed. Surveys involve walking around the perimeter of the mussel bed with a GPS to estimate the size of the bed. Transect surveys are carried out to caluculate the percentage cover of mussels with samples taken to estimate biomass, density and length frequency of the bed. The surveys have been carried out over a number of years and so trends in the mussel beds can be compared over time.