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Joy D. Albertson

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In 1992 we collected 22 failed California Clapper Rail (Rallus longirostris obsoletus) eggs from four tidal marshes of south San Francisco Bay for organochlorine analysis and determination of eggshell thickness. Mean eggshell thickness of these eggs (262 microns) was not statistically distinguishable from that of pre-1932 museum eggs (271 microns). Total PCB concentrations in eggs ranged from 0.65 to 5.01 μg g−1 on an adjusted fresh wet weight basis, with a geometric mean concentration of 1.30 μg g−1. DDE concentrations were extremely low at a geometric mean of 0.11 μg g−1. Geometric mean concentrations of all other organochlorines detected were below 0.10 μg g−1. The concentrations of all organochlorines except...
Categories: Publication; Types: Citation; Tags: Condor
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Management actions to protect endangered species and conserve ecosystem function may not always be in precise alignment. Efforts to recover the California Ridgway’s Rail (Rallus obsoletus obsoletus; hereafter, California rail), a federally and state-listed species, and restoration of tidal marsh ecosystems in the San Francisco Bay estuary provide a prime example of habitat restoration that has conflicted with species conservation. On the brink of extinction from habitat loss and degradation, and non-native predators in the 1990s, California rail populations responded positively to introduction of a non-native plant, Atlantic cordgrass (Spartina alterniflora). California rail populations were in substantial decline...
Categories: Publication; Types: Citation; Tags: Ecology and Society
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