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This data set includes U.S. Census Bureau 1990 population information for the United States, presented by county. Included are total population counts; various statistics on race, ethnic, and gender distributions; income statistics; urban and rural statistics, and median age. This is a revised version of the July, 2004, data set, with data for urban and rural statistics added.
This data set includes U.S. Census Bureau population information for the United States and Puerto Rico, presented by county. These data are from the 2000 Census and include total population counts, population density values, gender and age statistics, various statistics on race and ethnicity distributions, urban and rural statistics, and population change between 1990 and 2000. This is a revised version of the July, 2004, data set, with additional data fields included.
Structure of antigenic sites on the haemagglutinin molecule of H5 avian influenza virus and phenotypic variation of escape mutants.
This data set includes U.S. Census Bureau 1980 population information for the United States, presented by county. Included are total population counts, various statistics on race, ethnic, and gender distributions and urban and rural statistics.
Hazard evaluation of inorganics, singly and in mixtures, to flannelmouth sucker Catostomus latipinnis in the San Juan River, New Mexico.
Larval flannelmouth sucker (Catostomus latipinnis) were exposed to arsenate, boron, copper, molybdenum, selenate, selenite, uranium, vanadium, and zinc singly, and to five mixtures of five to nine inorganics. The exposures were conducted in reconstituted water representative of the San Juan River near Shiprock, New Mexico. The mixtures simulated environmental ratios reported for sites along the San Juan River (San Juan River backwater, Fruitland marsh, Hogback East Drain, Mancos River, and McElmo Creek). The rank order of the individual inorganics, from most to least toxic, was: copper > zinc > vanadium > selenite > selenate > arsenate > uranium > boron > molybdenum. All five mixtures exhibited additive toxicity...
Some animals have the cognitive capacity to differentiate between different species of predators and generate different alarm calls in response. However, the presence of any addition information that might be encoded into alarm calls has been largely unexplored. In the present study, three similar-sized human females walked through a Gunnison's prairie dog (Cynomys gunnisoni) colony wearing each of three different-colored shirts: blue, green, and yellow. We recorded the alarm calls and used discriminant function analysis to assess whether the calls for the different-colored shirts were significantly different. The results showed that the alarm calls for the blue and the yellow shirts were significantly different,...
This data set contains the 1995-1999 fetal and infant mortality rates for the United States, including Puerto Rico and the U.S. Virgin Islands. There are statistics for eight demographic groups: female, male, American Indian or Alaska Native, Asian or Pacific Islander, Black or African American, White, Hispanic or Latino, and all groups combined. The race category for fetal deaths is determined for statistical purposes based on the race of the mother as reported on the birth certificate. The rates for counties, States, and the nation are included. The national statistics were calculated from data for the fifty States, the District of Columbia and five U.S. dependent areas (American Samoa, Guam, Northern Mariana...
Transmission of H7N7 avian influenza A virus to human beings during a large outbreak in commercial poultry farms in the Netherlands.
Understanding behavioral changes of prey and predators based on lunar illumination provides insight into important life history, behavioral ecology, and survival information. The objectives of this research were to determine if bobcat movement rates differed by period of day (dark, moon, crepuscular, day), lunar illumination (<10%, 10 - <50%, 50 - <90%, >90%), and moon phase (new, full). Bobcats had high movement rates during crepuscular and day periods and low movement rates during dark periods with highest nighttime rates at 10-<50% lunar illumination. Bobcats had highest movement rates during daytime when nighttime illumination was low (new moon) and higher movement rates during nighttime when lunar illumination...