Taming the Puma

Genomic Ancestry of the American Puma (Puma concolol1

From the Laboratory of Genomic Diversity, National Cancer Institute, Frederick Cancer Research and De­ velopment Center, Frederick, MD 21702-1201. We are grateful to acknowledge lull collaborative credit to the investigators listed in Figure lA who supplied biologi­ cal specimens upon which this study is based. We would like to thank all the collaborators that collected or aided in the collecti...

Genomic ancestry of the American puma (Puma concolor).

Puma concolor, a large American cat species, occupies the most extensive range of any New World terrestrial mammal, spanning 110 degrees of latitude from the Canadian Yukon to the Straits of Magellan. Until the recent Holocene, pumas coexisted with a diverse array of carnivores including the American lion (Panthera atrox), the North American cheetah (Miracynonyx trumani), and the saber toothed ...

Puma (Puma concolor) epididymal sperm morphometry

The Andean puma (Puma concolor) has not been widely studied, particularly in reference to its semen characteristics. The aim of the present study was to define the morphometry of puma sperm heads and classify their subpopulations by cluster analysis. Samples were recovered postmortem from two epididymides from one animal and prepared for morphological observation after staining with the Hemacol...

Taming the White Bear

Previous research indicates that prior information about a target feature, such as its color, can speed search. Can search also be speeded by knowing what a target will not look like? In the two experiments reported here, participants searched for target letters. Prior to viewing search displays, participants were prompted either with the color in which one or more nontarget letters would appea...

Taming the Quanta