Chapter 51 outline - Chapter 51 Animal Behavior Overview:...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Chapter 51 Animal Behavior Overview: Shall We Dance? Cranes engage in interesting dancing behavior during courtship Animal behavior is based on physiological systems and processes A behavior is an action carried out by muscles or glands under the control of the nervous system in response to a stimulus Concept 51.1: Discrete sensory inputs can stimulate both simple and complex behaviors An animals behavior is its response to external and internal stimuli Ethology- the scientific study of how animals behave, particularly in their natural environment. According to early ethologist Niko Tinbergen, four questions should be asked about behavior: What stimulus elicits the behavior, and what physiological mechanisms mediate the response? How does the animals experience during growth and development influence the response mechanisms? How does the behavior aid survival and reproduction? What is the behaviors evolutionary history? These questions highlight the complementary nature of proximate and ultimate perspectives Proximate causation , or how explanations, focus on how a behavior occurs Environmental stimuli that causes behavior Ultimate causation , or why explanations, focus on Evolutionary significance of a behavior Behavioral ecology the study of the ecological and evolutionary basis for animal behaviors It integrates proximate and ultimate explanations for animal behavior Fixed Action Patterns A fixed action pattern is a sequence of unlearned, innate behaviors that is unchangeable Once it begins, it usually carries on to completion A fixed action pattern is triggered by an external cue known as a In male stickleback fish, the stimulus for attack behavior is the red underside of an intruder When presented with unrealistic models, as long as some red is present, the attack behavior occurs Oriented Movement Environmental cues can trigger movement in a particular direction Kinesis and Taxis A kinesis is a simple change in activity or turning rate in response to a stimulus For example, sow bugs become more active in dry areas and less active in humid areas Though sow bug behavior varies with humidity, sow bugs do not move toward or away from specific moisture levels A taxis less automatic than kinesis, it has oriented movement toward or away from stimulus Many stream fish exhibit a positive taxis and automatically swim in an upstream direction This taxis prevents them from being swept away and keeps them facing the direction from which food will come Migration Migration is a regular, long distance change in location Animals can orient themselves using Position of the sun and circadian clock North star positioning Earths magnetic field Behavioral Rhythms Some animal behavior is affected by the animals circadian rhythm, a daily cycle of rest and activity Behaviors such as migration and reproduction are linked to changing seasons, or a...
View Full Document

This note was uploaded on 01/25/2011 for the course BIO 1510 taught by Professor Unknown during the Spring '07 term at Georgia Institute of Technology.

Page1 / 11

Chapter 51 outline - Chapter 51 Animal Behavior Overview:...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online