BIO 13- Sexual Selection LIONMANE

BIO 13- Sexual Selection LIONMANE - Outline Todaythe lions...

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1 10/26/2008 1 13- Sexual Selection continued October 27 10/26/2008 2 Outline Today—the lion’s mane Wednesday —the jumping spider http://eebweb.arizona.edu/Animal_Behavior/spider s/spider0.htm Friday—3 other cases • Intersexual selection: guppies • Monogamy vs polygamy: house wren • Asexual reproduction: purple loose strife 10/26/2008 3 Female Plant 'Communicates' Rejection Or Acceptance Of Male ScienceDaily (Oct. 24, 2008) — Without eyes or ears, plants must rely on the interaction of molecules to determine appropriate mating partners and avoid inbreeding. In a new study, University of Missouri researchers have identified pollen proteins that may contribute to the signaling processes that determine if a plant accepts or rejects individual pollen grains for reproduction. 10/26/2008 4 The Lion’s Mane Figures from article in American Scientist vol 93 #3 (June 2005) pp 226-235
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2 10/26/2008 5 • Figure 1. Manes are unique to lions—no other cat species has them, so they must serve some specialized function. Yet the purpose of the male lion's mane remained unverified until recently. 10/26/2008 6 Figure 2. Manes can be short or long, nearly black or almost white. The length and color vary considerably within a group , but the greatest variety lies between populations that inhabit different climates. Example (right) adult males in Kenya's Tsavo National Park have extremely short manes, frequently bearing only vestigial side- whiskers and a tufty sprout atop their heads 10/26/2008 7 Sexual selection? • Dimorphic
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This note was uploaded on 04/25/2010 for the course BIO BIO152 taught by Professor Cordon during the Fall '09 term at University of Toronto.

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BIO 13- Sexual Selection LIONMANE - Outline Todaythe lions...

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