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There are many threats to the survival of the Southern California Steelhead DPS. Principal threats include, but are not limited to, alteration of stream flow patterns and habitat degradation, barriers to fish passages, channel alterations, water quality problems, non-native exotic fish and plants and climate change. [5]
Steelhead Oncorhynchus mykiss; DPS/ESU Name Initial/Revised status Current status Boundary Map [1]; Southern California DPS: Endangered (1997), (2006) [2] Endangered (2011) South-Central California Coast DPS
Three adult steelhead were sighted five years ago in the Santa Clara River that flows between Santa Clarita and Oxnard, Marlow adds. Only 177 Southern California steelhead have been seen in the ...
Malibu Creek Steelhead (c.1943) It is estimated that Steelhead (Oncorhyncus mykiss irideus) populations within the Southern California Coast Steelhead Distinct population segment (DPS) have declined dramatically from annual runs totaling 32,000-46,000 adults to less than 500 returning adult fish. [10]
Southern California steelhead trout have been pushed to the brink of extinction as their river habitats have been altered by development and fragmented by barriers and dams.
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In February, 1999, steelhead (Oncorhyncus mykiss irideus) were discovered in the creek by Toby Shackelford, making San Mateo Creek the only watercourse south of Malibu Creek in Los Angeles County with steelhead in the endangered Southern California Steelhead DPS. [19] Steelhead have historically spawned in the creek, whose upper reaches also ...
The federally endangered southern California steelhead (listed in 1997) is of particular importance, given the watershed's often dry and always variable climate. [4] The steelhead found in the Ventura River are part of the Southern California Steelhead Distinct Population Segment (DPS) were listed as federally endangered. [6]