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“ I kept the door locked. I can’t understand how they all got in there”

Mating Systems. “ I kept the door locked. I can’t understand how they all got in there”. Greek Terms. Terms ending with … gamy refer to number of partners or characteristics of gametes. Terms ending with … gyny refer to women Gynos – Woman

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“ I kept the door locked. I can’t understand how they all got in there”

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  1. Mating Systems “ I kept the door locked. I can’t understand how they all got in there”

  2. Greek Terms • Terms ending with …gamy refer to number of partners or characteristics of gametes. • Terms ending with …gyny refer to women Gynos – Woman • Terms ending with …andry refer to men Andros – Man • Mono – one; Poly - many

  3. Types of Mating Systems • Monogamy (Greek: mono, single; gamos, marriage) • Polygamy (Greek: poly, many; gamos, marriage • Polygyny (Greek: poly, many; gyna, woman) • Polyandry (Greek: poly, many; andros, man) • Polygynandry (Greek: poly, many; gyna, woman; andros, man) • Promiscuity (Latin: pro, forth; miscre, to mix)

  4. It is a popular misconception that Mute Swans (left) pair for life and that a bird will pine to death when its partner dies. This is far from true, with some birds having as many as 4 mates in a life time, and in some cases actually 'divorcing' a mate in favor of a new one. • Monogomy– The predominant mating system in birds. Exclusive pair bond with a single member of the opposite sex for purposes of raising young. • Every monogomous system studied has at lest some cheating

  5. Polygamy– Any mating system involving pair bonds with multiple mates of the opposite sex. Only 3% of all birds practice polygamy

  6. Male Red-winged blackbirds can have up to 15 female mates and average about 5. • Polygyny– a kind of polygamy in which a male pairs with two or more females. • Sustained association distinguish this from promiscuous behavior

  7. Polyandrous female phalaropes (left), compete for males at productive feeding grounds and initiate courtship with males. **Males incubate the eggs and do not tolerate the female near the nest** Wilson’s Phalarope • Polyandry– a rare kind of polygamy in which a female pairs with many males • Serial Polyandry • Simultaneous Polyandry

  8. Examples tinamou Ostrich Emu • Polygynandry– a kind of polygamy in which a female mates with several males, each of which also pairs with several different females

  9. During courtship Atlantic Puffins (left) are quite promiscuous birds. • When mating ceremonies take place, other nearby birds may attempt to join in Promiscuity – Indiscriminant sexual relationships, usually of brief duration. Variance in male reproductive success reaches its maximum value in this system. Quite often squabbles break out and birds become locked in battle using feet, wings and bill to drive away would-be interlopers to these private affairs.

  10. Cuckoldry in the Condo!

  11. Older, established male Purple Martins sing songs to attract young yearling males. The older males then concentrate on on copulating with the mates of their naïve, young neighbors - - with much success!! Adult males add, through extra-pair copulations, an extra 3.6 fertilized eggs to the 4.5 eggs produced by their own mates Tallest Purple Martin Colony in the world (Canada)

  12. Web Links 1. Sex Drives Birds Aparthttp://www.nature.com/nsu/010315/010315-5.html 2. MATING SYSTEMS, SPERM COMPETITION, AND THE EVOLUTION OF SEXUAL DIMORPHISM IN BIRDS (Click Here For the paper)

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