BehaviorEcols_2010_forupload

BehaviorEcols_2010_forupload - Phylogenetic trees...

Info iconThis preview shows pages 1–13. Sign up to view the full content.

View Full Document Right Arrow Icon
Phylogenetic trees
Background image of page 1

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

View Full DocumentRight Arrow Icon
Phylogenetic trees
Background image of page 2
Phylogenetic trees
Background image of page 3

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

View Full DocumentRight Arrow Icon
The molecular clock is a yardstick for measuring absolute time of evolutionary change based on the observation that some genes and other regions of genomes seem to evolve at constant rates, ticking like a clock Molecular Clocks
Background image of page 4
Molecular Clocks
Background image of page 5

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

View Full DocumentRight Arrow Icon
Background image of page 6
Chapter 51 Behavioral Ecology
Background image of page 7

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

View Full DocumentRight Arrow Icon
What Is Behavior? Behavior is what an animal does and how it does it Behavior includes muscular and nonmuscular activity What do behavioral ecologists study?
Background image of page 8
BEHAVIOR: A male stickleback fish attacks other male sticklebacks that invade its nesting territory. PROXIMATE CAUSE: The red belly of the intruding male acts as a sign stimulus that releases aggression in a male stickleback. ULTIMATE CAUSE: By chasing away other male sticklebacks, a male decreases the chance that eggs laid in his nesting territory will be fertilized by another male. Behavioral traits can evolve by natural selection
Background image of page 9

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

View Full DocumentRight Arrow Icon
bee waggle dance Behavioral traits can evolve by natural selection
Background image of page 10
Behavioral traits can evolve by natural selection Because genes influence behavior, natural selection can result in evolution of behavioral traits in populations
Background image of page 11

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

View Full DocumentRight Arrow Icon
Behaviors evolve because they have  costs and benefits For example, cost-benefit analysis of feeding behavior in crows
Background image of page 12
Image of page 13
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 11/12/2010 for the course BSCI BSCI 110B taught by Professor Johnson during the Spring '09 term at Vanderbilt.

Page1 / 30

BehaviorEcols_2010_forupload - Phylogenetic trees...

This preview shows document pages 1 - 13. Sign up to view the full document.

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