What are the most common mechanisms of sympathetic  speciation and in which major group of organism does this happen most often

In 1993, Dr Knox Todd, an emergency physician on the medical staff of the UCLA Emergency Center in Los Angeles, reported study findings on a pain study. In the study, they looked at treatment given to all emergency department patients at UCLA between the ages of 15 and 55 over a two-year period for the treatment of an isolated long-bone fracture to arm or leg. They selected this injury because it is one of the most consistently painful. The patients had no other serious injuries. Given the community served, these patients were either Hispanic (31 patients) or White (108 patients). They found: - 17 of the 31 Hispanic patients (55%) received no medication for pain during treatment - 28 of the 108 White patients (26%) received no medication for pain during treatment Many professional colleagues criticized the study and suggested that different ethnic groups respond to pain differently. That Hispanic patients may be more stoic in the face of their injury, expressing fewer symptoms of pain…

How does bottleneck effect relate to the founder effect? is the founder effect a consequence of the bottleneck effect?

What are the key behavioral characteristics of the patas monkey? For example, preferred habitat, activity pattern (diurnal, nocturnal), ecology, diet (insectivore, gumivore, frugivore, folivore, etc.) locomotor pattern or patterns, and social structure. Include observations of sexual dimorphism if present in this species.