11:216:269 Lecture Notes - Lecture 10: Biological Specificity, Blood Sugar, Glucocorticoid
3 Dec 2017
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Initial conspecifics were typically bigger than challengers: why would the territory owner always win, speckled wood butterfly study, territory: spot of sunlight on the floor, light and dark colored butterflies; 99. 9% of the time, attacker is repelled, experiment: Re-release white black always wins: agonistic behaviors, high energy expenditure = energy needed to patrol, fight, etc. Fight or flight response adrenaline goes into bloodstream. Increase metabolism (1) blood sugar increases (2) oxygen increases (3) blood flow increases (4) reproduction and digestion decrease: life span of territory owners is shortened. Dominant males have high testosterone (androgen) high levels. Winners of fights have high androgen levels higher levels of of aggression parasitism & disease, higher levels of combat wounds shorter life: subordinates (losers! ) have high levels of glucocorticoids (stress: signal = submission hormones) Hawk and dove game (1) each opponent can play 1 of only 2 strategies (a) hawk strategy: immediately attacks opponent (b) dove strategy: immediately runs away.
