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    The Status and Distribution of the Freshwater Fishes of Southern California

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    Subject
    Status; Distribution; Freshwater Fishes; Southern California
    Author
    Swift, Camm C.; Haglund, Thomas R.; Ruiz, Mario; Fisher, Robert N.
    Journal Title
    Scas: Bulletin of the Southern California Academy of Sciences
    Volume
    92
    Issue
    scas/vol92/iss3; 3
    Metadata
    Show full item record
    URI
    https://scholar.oxy.edu/handle/20.500.12711/10857
    Abstract
    The fresh and low salinity waters of southern California include the <br /><br />Owens, Mohave, Colorado, and coastal drainages south of Monterey Bay to the <br /><br />Mexican border. The youthful topography presents a strong dichotomy between <br /><br />steep rocky streams abruptly meeting relatively flat deserts or coastal plains. Little <br /><br />or no intermediate, foothill habitat exists. Thirty-eight native freshwater and 23 <br /><br />estuarine fishes have been recorded from this area. In addition, at least 1 00 species <br /><br />have been introduced, with widely varying success. Since the late 1940s and 1950s <br /><br />the native fishes of the Owens, Colorado, and Mohave drainages have been in <br /><br />jeopardy or extirpated in California. At the same time, the lowland fishes in coastal <br /><br />drainages, particularly on the Los Angeles Basin, also disappeared. Upland species <br /><br />of the coastal drainages still remain in a few isolated areas but are so reduced that <br /><br />special protection is needed. Only one estuarine species, Eucyclogobius newberryi, <br /><br />is threatened. Some tropical estuarine species of extreme southern California were <br /><br />last collected 50 to 80 years ago, and are very rare or extirpated here. If the <br /><br />remaining elements of the fish fauna are to survive, immediate action is needed <br /><br />to preserve the remaining habitat and to restore areas within the native range.
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