LECTURE_7-1 - behavioral, reproductive, and physiological...

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LECTURE 7 INTRODUCTION TO PROXIMATE MECHANISMS Introduction to trade-offs Name the many things birds do in their lives: What systems are involved in controlling these behaviors and where the energy is allocated? What are the physiological sources of energy? We’ve discussed behavioral trade-offs (e.g. mating effort vs. parental effort), but there are underlying physiological trade-offs that control these. Trade-off = an exchange for one thing in return for another Overall, environmental influence stimulate physiological trade-offs, which stimulate behavioral trade-offs, which then lead to a behavioral output. The physicological trade-offs represent constraints BASIC DEFINITIONS Life history – the overall picture of an organism’s life, including physiological,
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Unformatted text preview: behavioral, reproductive, and physiological characteristics Constraint factor preventing full expression of a physiological or behavioral trait E.g. broiler size Every bird has an energy budget. This energy budget must be controlled physiologically, which is largely accomplished by the endocrine system. Endocrine secretion of a gland that is transmitted by blood (in contrast to exocrine, secreted to the outside sweat glands) WHAT ARE THE MAJOR ENDOCRINE GLANDS? We can see how endocrine processes drive various behaviors: Reproductive hormones control reproductive behaviors Stress hormones control fight or flight responses Thyroid hormones control metabolism and food intake Many hormones adjust immune function...
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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 University of Georgia Athens.

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LECTURE_7-1 - behavioral, reproductive, and physiological...

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