had appeared to be incubating an egg but then abruptly abandoned the site, an inaccessible cavity in a redwood. University of California Press, Berkeley. In 2005, condors 164 and 171, both 8 years old, formed a pair bond and occupied a territory on the Big Sur coast. Almost 200 years later, in December 1792, Archibald Menzies collected the type specimen in the Monterey area (Grinnell 1932). Concentrations of PCBs in the central California eggs measured to date, however, have been below threshold levels of effect (D.
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All of the other ten eggs failed (Table 3). Of the 16 eggs laid in the wild in central California, three hatched in the wild without any manipulation or other interference and three hatched after artificial incubation at the Los Angeles Zoo (above). Water loss therefore resulted from a modification of the eggshell structure not yet characterized (below). 1983) determined that contamination of the Southern California Bight by DDTs in the 1970s exceeded by an order of magnitude or more that of any other coastal environment in the USA; a review of the global literature indicated that this comparison applied also to the. Statistical analySES For statistical tests we used systat 13 (2009 and we accepted significance when.05 (two-tailed). Although shell fragments were taken from the equatorial region of the intact eggs from central California, it was not possible to determine the area of the egg from which the relatively small southern California fragments had come. Predicted rates of weight loss at time of collection of eggs of California Condors reintroduced to central California, 20062010; projected percentages of weight loss at 54 days. We attribute crushing of the egg to the extreme thinning and weakness of the shell, similar to that of the eggs of Brown Pelicans (Pelecanus occidentalis) on Anacapa Island in 1969 (Risebrough. Thereafter LJB, RWR, and JB measured the thickness and examined structural features of the shells of eggs from central and southern California from photomicrographs taken in the Robert. Hatching success In southern California, 22 eggs were laid in the wild from 2006 to 2010. Bald Eagles where reintroduced to the Channel Islands in the 1980's but their eggs were not viable until 2007. Sire/dama year, eggb, nest site, wild-laid.