lecture_10-2

lecture_10-2 - This peak occurs for every egg laid in the...

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This peak occurs for every egg laid in the sequence. (So for a clutch of 3, you get 3 peaks). Then, courtship and nest-building is also dependent on sex steroids. Both testosterone and estrogen tend to increase throughout the stages of courtship and nest-building, peak before ovulation, and then fall to basal levels again in between eggs laid. In a seasonal context, these many rises and falls of sex steroid concentrations are responsible for the average increase in sex steroids during the breeding season. And when mapped with male patterns, it becomes clear that synchronization of male and female reproduction can be complex. Just as we discussed with males, researchers wondered if courtship and nest- building behaviors could be elicited using estrogen treatments alone. Answer = no. Just like males, females have a low level of hormone during the non-breeding season, and a new higher baseline during the breeding season that can be stimulated by social interactions to produce a maximum. What you need is environmental “priming” that triggers that higher baseline, and
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This note was uploaded on 04/08/2011 for the course POUL 3123 taught by Professor Navara during the Spring '09 term at UGA.

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lecture_10-2 - This peak occurs for every egg laid in the...

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