This three year study (1970-1972) was undertaken to document reproductive success in a colony of great blue herons at the San Joaquin River Heronry, Merced County, California. Quantitative data were collected on incubation period, clutch size, ha . . .

Farm ponds are small man-made resevoirs used for watering of farm animals, irrigation and fishing. Because of their small size, farm ponds are susceptible to rapid eutrophication which can cause growth of noxious or poisonous algae, unpleasant odor . . .

Following the methods of Gardner and Gardner (1969) and Premack and Premack (1972), others have continued human- pongid two-way communication studies elaborating upon the procedures of both the former investigators. Fouts (1973), after the Gar . . .

Bush Anemone (Carpenteria californica Torr.) is a rare endemic shrub that exists within a limited range in Eastern Fresno County, California. Little floristic or vegetation research has been conducted on the species in its natural environment. The . . .

Meso-American squirrel monkeys (Saimiri sciureus), restricted to the narrow coastal zone of southeastern Costa Rica and southwestern Panama, are widely separated from their conspecifics east of the Andes, and have a more reduced range than indicate . . .

Waters containing enteropathogenic microorganisms (i.e., Salmonella, Shigella) are considered unsafe for human consumption. Traditionally, indicator bacteria have been utilized for the assess- ment of bacteriologically unsafe waters. However, a d . . .

Two hemipterans, Oncopeltus fasciatus Dallas (Lygaeidae) and Leptocoris trivittatus Say (Corizidae) (Feir, 1974; Woolley, 1949), have been used extensively in research and teaching due to availability and/or ease of rearing. The common squash bug, . . .

Ranch ponds are numerous in the foothills of the western Sierra Nevada. An article appearing in the California Cattleman (anon, 1975) estimated that there were more than 50,000 ponds of less than 0.0123 cubic hectometers (10 acre feet) in California. . . .

Previous work on the North Kings deer herd has shown that the reproductive potential of the does was high; however, there was a 50 percent neonatal loss of fawns. The neonatal loss was hypothesized to be the result of a nutritional stress expe . . .

Shortly after the discovery of the role of bacteria as the etiological agents of human disease, the search for bacterial toxins began. Bacterial toxins were an important discovery, because they may enhance the pathogenicity of infection; the effect of . . .