lecture13 - BioNB 221: Lecture 13 Sept. 26, 2008 Lecture...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Sept. 26, 2008 Page 1 Lecture 13: Monogamy Janet Shellman Sherman Key questions we address: 1. What are the evolutionary forces favoring monogamous, parental care? 2. What factors allow us to predict genetic monogamy versus genetic polygamy among partners? 3. Does sexual selection operate in species with essential biparental care? ---- 1. Parental investment is defined as “any effort that raises offspring survival (and hence reproductive success) at the expense of a parent's ability to invest in other offspring” Robert Trivers 1972 Anisogamy sets up forces leading to sexual selection. Parental investment can accentuate or eliminate or even reverse those differences. But is monogamy simply the disappearance of sexual differences, with parental investment eliminating sexual selective pressures on both sexes? Two hypotheses generate current understanding 1. Essential male and female care: Biparental care is important for offspring survival and reproductive success
Background image of page 1

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

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 08/28/2008 for the course BIO 2210 taught by Professor Seeley during the Fall '08 term at Cornell University (Engineering School).

Page1 / 4

lecture13 - BioNB 221: Lecture 13 Sept. 26, 2008 Lecture...

This preview shows document pages 1 - 2. Sign up to view the full document.

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