Mating systems

1
Mating systems

• Monogamy pair bond between one male and one
  female
• Polygamy one individual forms pair bonds with
  many others
• Polygyny male mates with more than one female
• Polyandry female mates with more than one male
• Promiscuity mate with many, no pair bonds

2
Monogamy
Rare in mammals Common in Birds
3
Polygyny one male with many females Common in
mammals
4
Polyandry one female with many males rare
female
Since females attract mate, they are larger And
more colorful than male Wilsons phalaropes
5
Promiscuity no pair bonds Lek common mating
area
Prairie Chicken
Male sage grouse
6
Sexual Selection choice of one sex by another

• Sexual Dimorphism males and females look
  differently
• Color- males more brightly colored
• Ornamentation- antlers
• Size (if female larger reverse sexual
  dimorphism)
• Hamilton-Zuk Hypothesis
• More brightly colored males have less parasites
  (healthier)

7
Territorial Behavior
8
Calling
9
Fighting