lecture 16 - Happy Birthday Mating Systems Polygyny : males...

Info iconThis preview shows pages 1–16. Sign up to view the full content.

View Full Document Right Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

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

Unformatted text preview: Happy Birthday Mating Systems Polygyny : males mate with more than one female in a lifetime Monogamy : males and females mate with only one individual of the opposite sex in a lifetime Polyandry : females mate with more than one male in a lifetime Plecia nearctica Diptera: Bibionidae Love bugs males hover to capture emerging females Intra-sexual selection Ardent males Sperm competition prevent other males sperm from fertilizing eggs Spermatheca Sperm removal, genital cement, anti-aphrodisiac scents Single mating event (monogamy) vs. Multiple mating, guarded in copula Sperm competition in Odonates Sperm precedence occurs when most of a females eggs are fertilized by the sperm of only one of the males with which she has mated-usually the last male Cimicidae Bed Bugs Traumatic Insemination Male has hypodermic genitalia Pokes through female cuticle Inject sperm Sexual Selection? Xylocorris maculipennis Males pierce female, inject sperm into body cavity, some fertilize eggs Males may also pierce other males, who then fertilize with the piercing males sperm Anti-aphrodisiac scents Heliconius erato Males deposit scents on females at end of mating, similar to a territorial scent used to repel other males Intra-sexual selection Ardent males Depleted copulation In some parasitoid species, males produce a limited quantity of sperm, but will continue to mate after depleted Inter-sexual selection Choosey females Non-genetic benefits (direct benefits) Quality territories for young Resources Nuptial gifts Anti-predatory chemicals Spermatophore:...
View Full Document

This note was uploaded on 02/27/2010 for the course ENTOMOLOGY ent 104 taught by Professor Edwinlewis during the Spring '10 term at UC Davis.

Page1 / 43

lecture 16 - Happy Birthday Mating Systems Polygyny : males...

This preview shows document pages 1 - 16. Sign up to view the full document.

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