BIOL 102 Chapter Notes - Chapter 51: Gamete, Pair Bond, Promiscuity
Document Summary
Proximate (how does animal react to stimulus?) vs ultimate (why?) Doesn"t actually have to look like a fish, but needs red bottom that all male stickleback have. Fixed action pattern- once stimulus begins response, the response continues without change or variation; continues until the stimulus is gone; unlearned response. Synchronized daily with circadian rhythm, a daily sleep/ wake cycle or with circannual seasonal or photoperiodic cycles. Diurnal: single period of wakefulness during day time single period of sleeping during night time; daytime active. Nocturnal: activity patterns are reversed; nighttime active. Crepuscular- 4 different sequences: wakefulness at dawn, triesence during day, activity during dusk, triesence during night; dawn/dusk active. Worker bees- movement/ orientation based on location of food. Waggle dance- when food is at a greater distance. Pheromones: chemical signal sent to same species. Allelochemicals: chemical signals sent to a different species. Positives: no barriers (minimal barriers), broadly effective, persistent (not transient, continues behavior), energetically cheap.
