Bulletin (Southern California Academy of Sciences) articles from April 2005

Bulletin (Southern California Academy of Sciences) archives from April 2005

Biological assessment of Tecate Creek (U.S.-Mexico) with special regard to self-purification.
April 1, 2005... Abstract.--Macroinvertebrate organisms were sampled at four sites on Tecate Creek (U.S.-Mexico) and quantitatively evaluated using the SIGNAL-w (Stream Invertebrate Grade Number--Average Level-weighted) index. A morphological assessment of the...

Age and growth of spotted sand bass, paralabrax maculatofasciatus, in Bahia de Los Angeles, Baja California, Mexico, with age validation using Otolith edge analysis.
April 1, 2005... Abstract.--Spotted sand bass, Paralabrax maculatofasciatus, were collected from Bahia de Los Angeles, Baja California, Mexico covering as wide a size range as possible over four seasons (spring, summer, fall, and winter). Age was estimated and...

Feeding Ecology of Salton Sea Tilapia (Oreochromis spp.).
April 1, 2005... Abstract.--We investigated the feeding ecology of tilapia (Oreochromis spp) in the Salton Sea. Stomachs and intestines were sampled at each season. Fish foraged at the surface during the summer when dissolved oxygen was low. The proportion of...

Microhabitat segregation of three species of pocket mice (Genus Chaetodipus) in coastal Baja California, Mexico.
April 1, 2005... Abstract.--I compared vegetation and substrate characteristics at capture locations of three syntopic species of pocket mice (Chaetodipus: Heteromyidae) to determine differences in microhabitat affinities of these ecologically similar rodents...