BIOL10210 Lecture Notes - Lecture 18: Damselfly, Orgasm, Oviduct

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25 Apr 2018
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When sperm competition (pollen competition in the plants) selection will operate directly on sperm attribute themselves: size, shape, speed. Dung fly: mate in fresh feces lay eggs there, maggots are born there and feed off of dung fly, last man in, wins: parker"s study of dung flies. The last male to copulate usually fathers the most offspring. Know through dna paternal tests, we know who mother is bc we watched her lay the eggs watch who she mates with. How long he spends engaged with the female is in proportion to how many offspring they have. Positive correlation: what about sperm competition in a spawning sperm, levitan also found: Slow-moving sperm are needed in up to a 100 times greater quantity to achieve the same fertilization as fast-moving sperm; All sperms slow as they age and older sperm are much less likely to fertilize an egg.

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