BIL 160 Lecture Notes - Lecture 21: Fixed Action Pattern, Proximate And Ultimate Causation, Drosophila Melanogaster
28 Apr 2016
School
Department
Course
Professor
Document Summary
Animal behavior: actions carried out by muscles under control of nervous sys. Behaviorial ecology: study of the ecological and evoluntionary basis for animal behavior o. Asking proximate (1, 2) and ultimate (3, 4) causes of behavior. Bahavioral ecology integrates proximate and ultimate explanations for animal behavior. Proximate causation: how behavior occurs or modified (tinbergens #1 and 2) Developmentally fixed and does not vary among individuals. We have little knowledge don"t know how gene-->coding-->behavior. Sequence of unlearned acts directly linked to simple stimulus. Fixed action patterns are unchangeable and, once initiated, usually carried to completion. Fixed action pattern triggered by external cue aka sign stimulus. In behavior ecology, signal: behavior that causes change in another animal"s behavior. Animals communicate using visual, chem, tactile, and auditory signls. Fruit fly courtship follows 3-step stimulus-response chain o. Stimulus-->response-->behavior (another stimulus for another behavior) over and over again. Evolution: male id female of same species and orients toward her a.
