Alameda Creek Alliance


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Endangered Fish


Endangered fish in the Alameda Creek watershed

Central California Coast Steelhead Trout (Oncorhynchus mykiss)

Status: Federally threatened
Habitats: Cold-water streams, with adequate dissolved oxygen, gravel substrates free of excessive silt for spawning, and riparian vegetation for cover, food and habitat structure
Threats: Habitat destruction and modification from dams, water diversions, urban development, livestock grazing, gravel mining, logging, and agriculture
Locations in Alameda Creek watershed: Anadromous steelhead trout currently only occur in the lower ten miles of Alameda Creek below the BART weir, but fish passage projects are underway to allow steelhead access all the way to the headwaters of Alameda Creek, and tributaries Stonybrook Creek, Sinbad Creek and Arroyo de la Laguna. Landlocked populations of trout above dams in Calaveras and San Antonio Reservoirs were formerly ocean-going steelhead.

Center for Biological Diversity information page on Steelhead Trout

Information on Steelhead Trout from NOAA Fisheries


Pacific Lamprey (Lampetra tridentate)

Status: state species of special concern
Habitats: Medium- and large-sized, low-gradient rivers and streams; spawning habitat is similar to that for salmon or steelhead trout
Threats: Habitat loss due to reduced river flows, water diversions, dredging, streambed scouring, channelization, inadequate protection of streamside vegetation, chemical pollution and spills, and impeded upstream passage due to dams and poorly designed road culverts
Locations in Alameda Creek watershed: upper Alameda Creek in Sunol Regional Park

Center for Biological Diversity information page on Pacific Lamprey

Fact sheet from the Fish and Wildlife Service about Pacific Lamprey