"the ancestors of modern humans spent a period of time adapting to a semiaquatic existence. AAH (Aquatic Ape Hypothesis) emerged from the observation that some traits that set humans apart from other primates have parallels in aquatic mammals". http://en.wikipedia.org/wiki/Aquatic_ape_hypothesis
"AAH (Aquatic Ape Hypothesis) suggests that many features that distinguish humans from their nearest evolutionary relatives emerged because the ancestors of humans underwent a period when they were adapting to an aquatic or semi-aquatic way of life, but returned to terrestrial life before having become fully adapted to the aquatic environment"
Behavior and Social Structure
Frequently referred to as the �Make Love, Not War� primate, Bonobos have a reputation for being docile and diplomatic in their social and sexual relationships. Their generally peaceful and cooperative society is attributed to the evolution of a highly complex social system.
Bonobo communities are peace-loving and egalitarian. Bonobos are considered to have a matriarchal society, meaning that females have a higher social status than males and social interactions are female-centered and female-dominated. Females have strong social bonds amoungst themselves, but they do not exclude males.
Bonobos, like their chimpanzee cousins, live in �fission-fusion� societies and therefore tend to vary in party size. Communities of up to 100 bonobos will usually split into small groups when searching for food during the day and come back together to sleep at night. Bonobos have a male philopatric society; males remain with their birth group whereas females migrate to other groups during adolescence.
Sexual activity plays a large role in bonobo society; it is used for pleasure, social bonding, and conflict resolution. Bonobos are extremely diverse in their social and sexual interactions. They do not form permanent monogamous partnerships and have sex without regard to age or gender, except for avoidance of relations between a mother and her adult sons.
Bonobos are the most vocal of the great apes. Their vocal communication is complex, frequent and often accompanied by hand gestures. Vocal communication plays an important role in bonobo society. Bonobos communicate where to find their favorite food using calls and squeals and can provide specific details about food quality and preference using a combination of vocal sequences. The voice of a bonobo is melodic and high pitched, in contrast to the deeper and more guttural vocalizations of a chimpanzee.
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