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ANT333Y1 (6)
Chapter 4

Chapter Four Summary.docx

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Department
Anthropology
Course
ANT333Y1
Professor
Shawn Lehman
Semester
Fall

Description
Chapter Four – The Primate Body The General Primate Body Plan  Strepsirhines on average are smaller than haplorhines  Nocturnal species are usually smaller than diurnal  Body plan reflects an inherent arboreal adaptation  Common traits o Pentadactyly o Opposable big toe/thumb o High wrist mobility, low ankle mobility o Nails instead of claws o Tail present in most, except tailless apes o Body covered in hair  Infants are usually differently coloured from parent which elicits protective behavior from adult  Plesiomorphic trait – an ancestral trait with a long evolutionary history  Amorphic trait – a derived, more recently evolved trait Body Size and Energy Requirements  Allometry – the relationship between size and shape and how this relates to physiological and morphological aspects of the body  If linear dimension of an animal we to double, surface area would increase by a multiple of four, and volume by eight  Larger animals have less S.A. = less heat loss  Smaller animals have to produce more heat, therefore, must eat more -0.75  Kleiber’s Law: BMR = kW  Jarman-Bell Principle o Large animals require more total food intake per day and because of this, they cannot afford to seek out widel
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