11_BehavioralEvol

11_BehavioralEvol - Behavioral Evolution 51.1, 51.2 1 What...

Info iconThis preview shows pages 1–10. Sign up to view the full content.

View Full Document Right Arrow Icon
1 51.1, 51.2 Behavioral Evolution
Background image of page 1

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

View Full DocumentRight Arrow Icon
2 What Is Behavior? Behavior What an animal does and how it does it Includes muscular and nonmuscular activity QuickTime™ and a Sorenson Video 3 decompressor are needed to see this picture.
Background image of page 2
3 Proximate and Ultimate Questions Proximate, or “how,” questions about behavior Focus on the environmental stimuli that trigger a behavior Focus on the genetic, physiological, and anatomical mechanisms underlying a behavioral act
Background image of page 3

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

View Full DocumentRight Arrow Icon
4 Ultimate, or “why,” questions about behavior Address the evolutionary significance of a behavior
Background image of page 4
5 Schooling in fish How? Sense movement of other fish by sight (eyes of sides of head) and lateral line Why? Minimize predation, reduce friction
Background image of page 5

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

View Full DocumentRight Arrow Icon
6 Ethology The study of behavior, especially under natural conditions Discipline developed in mid-1900s (Tinbergen, von Frisch, Lorenz) QuickTime™ and a TIFF (Uncompressed) decompressor are needed to see this picture. QuickTime™ and a TIFF (Uncompressed) decompressor are needed to see this picture.
Background image of page 6
7 Innate, no modification through learning Originates and is modified by learning Highly stereotyped Fixed, little variation Highly flexible Condition dependent Yawning Smiling Language acquisition Fixed action pattern
Background image of page 7

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

View Full DocumentRight Arrow Icon
8 Fixed Action Patterns (FAPs) Sequence of unlearned behaviors that are largely unchangeable Usually carried to completion once initiated Triggered by external stimuli
Background image of page 8
9 In male stickleback fish, the red underside of an intruder stimulates an attack Figure 51.3a (a) A male three-spined stickleback fish shows its red underside.
Background image of page 9

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

View Full DocumentRight Arrow Icon
Image of page 10
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/27/2008 for the course BISC 120Lg taught by Professor 11:00-01:50pm during the Fall '06 term at USC.

Page1 / 40

11_BehavioralEvol - Behavioral Evolution 51.1, 51.2 1 What...

This preview shows document pages 1 - 10. Sign up to view the full document.

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