FSHD 150B1 Lecture Notes - Lecture 6: Hominidae, Orangutan, Marmoset
6 Oct 2016
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Don"t live in families: mothers care for young up to 8 y. a. Great apes summarized: through closely evolutionarily related, the great apes and humans have a diversity of ecology, social organization, and behaviors. Close evolutionary (phylogenetic) relationship, therefore, does not insure the presence of paternal care. Chimp- barely a family, but a family. Gorilla- barely a family, but a family. Evolutionary genetic relatedness is not a factor that helps us explain when you see paternal care. Siaming: at about 1 year of age, mother becomes intolerant of infant, and the father assumes care. Titi monkey: closer bond between offspring and father than with mother. Fathers carry, groom, play, and share food. Owl monkey: fathers carry, groom, play and share food. Gibbon: monogamous (high paternity confidence) but no paternal care. Offspring survive more when being carried by fathers: yes, fitness is increased.
