Evolution Of Microevolution

A. Evolution and Behavior 1. Study microevolution by viewing domestication and natural selection in the wild. 2. Domestic dogs attack prey differently than their ancestral wolves do due to behavioral selection 3. In domesticating foxes, you are selecting for neotenous traits and a suppressed adrenal gland that made the foxes less aggressive 4. Natural disasters or major ecological changes are good examples of looking at microevolution 5. When studying behavior on a macroevolution scale can be difficult because behavior does not fossilize 6. Oviraptor nest – fossil records that are arranged in a pattern that suggests parental care 7. Dinosaurs head protrusions are used for specific hooting that
Activiational – used to regulated expression or performance of behavior patterns v. Freemartin – the term for a sterile female cattle twin due to prenatal exposure to male sex hormones w. Bisphenol-A – BPA – affects female uterus development/fertility – females are more sensitive than males 23. Monogamous Prairie Voles – example of nervous and endocrines system as a proximate mechanism of behavior x. Vassopressin is released in males during copulation y. Oxytocin is released in females during sex z. Must have necessary receptors for the peptide hormone C. Biological Rhythms 24. Physiological Pacemakers and environmental synchronizers make up biological clocks that define biological rhythms activities and behaviors 25. B.R’s are a great way to study proximate questions, as well as ultimate questions 26. BRs can be viewed as a wave and defined in wave terms {. Phase shift, phases, period, 27. Epicycle – ultradian rhythm is defined as a regular cycle or oscillation that takes less than a day or a very short period of time to complete 28. Tidal rhythms – 12.4 hours, 29. Lunar rhythms – 28 days 30. Circadian rhythms – 24