By 2005, the agency wants 90 percent of the nation's estuaries to be safe for harvesting shellfish; the figure in 1994 was 74 percent.
Treks were made to San Felipe on the east coast to harvest fish and shellfish and to collect salt.
The state charges a modest annual fee to those who are given permission to harvest shellfish from certain beds.
They had harvested and eaten so much local shellfish, which comprised the bulk of their diet, that they left large shell middens.
The Pericú are best known for their maritime orientation, harvesting fish, shellfish, and marine mammals from the waters of the southern Gulf of California.
The latest disaster threatens birds, fish, shellfish and the livelihoods of at least 5,000 families, banned from harvesting fish or shellfish along Galicia's northern coast.
Shell middens indicate that they also harvested shellfish from the coast.
The people settled along the numerous bodies of water in the area where they were able to harvest fish, oysters, and other shellfish in the fall and winter.
British Columbia officials today issued a ban on harvesting shellfish along a 135-mile stretch of Vancouver Island that has been affected by the spill.
Prior to European settlement, the Ohlone people used the area for harvesting shellfish and fish.