01:119:115 Lecture Notes - Lecture 23: Pair Bond, Circadian Clock, Asso
21 Apr 2016
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Sensory input - stimulus triggers simple or complex behavior: fixed action. A. 1. sequence of unlearned behavior in response to a simple stimulus (must be completed once started) A. 2. i. e, territorial stickleback fish - attacks other objects with red bellies (bc male sticklebacks have red bellies: migration - regular, long distance change in location. Circadian rhythm - occurs over a course of day (diurnal, nocturnal, crepuscular); useful because of food availability and to avoid predators. C. 1. b) exogenous cause: light intensity endogenous cause: internal. C. 2. b) breeding, migration, hibernation proximate is usually exogenous; day length hormonal changes: communication - transmission and reception of mutually recognizable signals from 1 animal to another can trigger behavior. Visual - fast, high information density, indicates position. Auditory - don"t need light, can go longer distances, calls (short and simple) vs songs (long and complex) Chemical - pheromones attack opposite sex; scent marking - many species use urine or feces.
