Lecture_9-3 - COSTS! Behavioral/reproductive costs:...

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Because these two activities cannot take place simultaneously, it makes sense that these two hormones are inversely related, and peak at different times. MONOGAMOUS VS. POLYGYNOUS HORMONE PATTERNS EUROPEAN STARLING EXAMPLE WHITE-THROATED SPARROW EXAMPLE If all that is required to make a male polygynous is an increase in one hormone, then why don’t all males raise testosterone and practice polygyny?
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Unformatted text preview: COSTS! Behavioral/reproductive costs: Decrease in offspring survival due to low parental care Increase in cuckholdry Often less preferred by females Physiological Costs: Increase in aggression-related injury Depression of immune system Decrease in fat stores Once again, behavior is driven by both behavioral and reproductive trade-offs!...
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