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TERRITORIAL REQUIREMENTS IN THE WILD
SOCIOLOGICAL FACTORS IN THE WILD STATE
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activity American bison amphibia animal in captivity animal psychology animal-man relationship animal's antelopes anthropomorphic aquarium artists avoid barrier Basle Basle Zoo bear behaviour Berne Bibliography biological biotope birds birds of prey bison cage captive animal caused Cervidae chamois chimpanzees climbing Clothbound completely confinement coprophagy danger deer definite domestic animals effect elephants enclosure enemy escape example excitement excrement experiments fact factor feeding female Figure fish flight distance flight tendency floor freedom Gart giraffe glass ground hares Hediger hoof human hypersexuality ibex illustrations important Index individual instance keep keeper lion living male mammals mating monkeys nature normal observed Paperbound parasites physiological plates play possible prey psychological reaction red deer reptiles result rodents sexual snakes social space space-time suitable temperature territory tion treatment unbiological ungulates usually wild animals wire netting young Zool zoological gardens