Skewtheory

Skewtheory - Reproductive Skew Theory 1 = dominants share =...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Reproductive “Skew” Theory
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 Equitable sharing Complete monopoly Degree of reproductive skew = dominant’s share = subordinates’ share Low High
Background image of page 2
3 Two main evolutionary models of reproductive skew • Transactional models (exchanges of reproductive fractions for benefits of cooperation) • Tug-of-war models (mutual, selfishness efforts to increase reproductive shares until it is no longer profitable to increase the effort further) Two kinds of incentives in transactional models Staying incentive-- a fraction of the reproduction just sufficient to guarantee that the subordinate stays and helps the dominant versus leaves to breed solitarily Peace incentive-- a fraction of the reproduction just sufficient to guarantee that the subordinate cooperates peacefully instead of fighting to the death for complete control of the group’s resources
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 Variables in 2-person staying incentive model • sol ( S ) = the subordinate’s expected reproductive success if it breeds solitarily • lone ( L )= the dominant’s reproductive success if it breeds solitarily • group ( G ) = the pair’s total reproductive output if the subordinate joins
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/07/2009 for the course BIO 2210 taught by Professor Seeley during the Fall '08 term at Cornell.

Page1 / 15

Skewtheory - Reproductive Skew Theory 1 = dominants share =...

This preview shows document pages 1 - 5. Sign up to view the full document.

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