Territoriality III Outline Fall 09 11_25

Territoriality III Outline Fall 09 11_25 - Animal Behavior...

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Animal Behavior IB 144 November 25, 2009 Aggression and Territoriality III Outline VIII. Territories can serve other purposes besides providing adequate food. Let me give you a few examples. A. Mating: 1. Resource defense polygyny. The amount of forage on Pronghorn territories translates into the number of females available for mating. 2. Lek Polygamy B. Anti-predation through spacing. In Great Tits, the number of nests attacked by predators is a function of spacing. C. Parasites and disease. Spacing should limit spread of disease, but this is hard to get data on because of other density dependent health effects. Bank swallows and bird lice. D. Reduce Aggression. Dear Enemy Hypothesis. Territorial animals learn their neighbors and the borders of the territory. This ultimately reduces the amount of fighting among territory holders. 1. Play-back experiments in Great Tits. Strangers’ calls are attacked; neighbors, as long as they are where they are supposed to be, are almost ignored. 2.
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Territoriality III Outline Fall 09 11_25 - Animal Behavior...

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