Does historical sampling reveal dramatic demographic changes in western gorilla populations?
The composite history of western gorillas could plausibly be explained by climatic oscillations inducing environmental changes in western equatorial Africa that would have allowed gorilla populations to expand over time but ultimately isolate the Cross River gorillas, which thereafter exhibited a dramatic population size reduction. The recent decrease in the Cross River population is accordingly most likely attributable to increasing anthropogenic pressure over the last several hundred years. Isolation of diverging populations with prolonged concomitant gene flow, but not secondary admixture, appears to be a typical characteristic of the population histories of African great apes, including gorillas, chimpanzees and bonobos.
The correlation of the absolute increase in systolic and diastolic blood pressure during two different mental stress tests in young subjects with high or slightly high blood pressure is very high. The correlation between the increase in blood pressure to mental stress in the laboratory and the blood pressure values obtained during non invasive out patient monitorization was found to be only intermediate for diastolic blood pressure nad null for systolic blood pressure in this study.