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The expenses are The expenses are damnabledamnable
Viktor Mazurets
Dong Thach
It is not easy to be a male. It is not easy to be a male. Spatially if you have to make Spatially if you have to make sperm twenty times longer sperm twenty times longer then you are. Or produce then you are. Or produce
billions and billions of sperm billions and billions of sperm in every ejaculate. Or in every ejaculate. Or
copulate a hundreds times a copulate a hundreds times a day to satisfy your partner. Or day to satisfy your partner. Or
perform some other feat or perform some other feat or prodigious sexual prowessprodigious sexual prowess
It is not easy to be a maleIt is not easy to be a male
Size & shape of sperm Size & shape of sperm
Sperm countSperm count
Number of copulationsNumber of copulations
Sexual prowessSexual prowess
Sperm CountSperm Count
Why does male need billion and Why does male need billion and billion of sperm?billion of sperm?
– The goal is to fertilize egg.The goal is to fertilize egg.– The measuring hostility of The measuring hostility of
female’s reproductive tract.female’s reproductive tract.– More sperm more chances.More sperm more chances.
Sperm Sperm CountCount
Human reproductive tract
Sperm CountSperm Count•The more sperm a male had, the better chances he will fertilized a female’s egg
•High sperm count compare to low sperm count
Splendid fairy wren
Sperm size and shape.Sperm size and shape.
Longer sperm, bigger Longer sperm, bigger sperm.sperm.
Variety in shape.Variety in shape.
Drosophila bifurca (fruit fly)
Drosophila hydei
Sperm size and shape.Sperm size and shape.
Drosophila melanogaster (fruit
fly)
Sperm size and shape.Sperm size and shape.
the world's longest sperm belongs to the fruit fly Drosophila bifurca. it is 20 times longer than its own body and 10,000 times longer than a human sperm.
(a) A male fly with one testis (unraveled) from an individual of the same size. (b) The male's reproductive system (a). (c) A close-up of a sperm store showing the individual sperm rolled up like balls of string waiting to be ejaculated. (d) A single, partially unraveled sperm, 58mm longer than many times the length of its owner.
The longest sperm in the world are made by a tiny fruit fly.
Sperm size and shape.Sperm size and shape.
Sperm size and shape.Sperm size and shape.
A giant sperm
A long sperm
Honey Queen Bee
ConclusionConclusion Sperm competitionSperm competition Passing on the genesPassing on the genes
Drosophila melanogaster
Limited number of copulationsLimited number of copulations
Sponge Sea urchins
In a sea
The reasons why we think that sperm The reasons why we think that sperm is unlimitedis unlimited
•Rely on current
Land plants
•Lend plants rely on pollinator or wind
On the land
The reasons why we think that sperm The reasons why we think that sperm is unlimitedis unlimited
Jack-in-the-pulpit produces ten times more seeds if
pollinated by scientists
Lemon Tetra
Bluehead
The truths about sperm availabilityThe truths about sperm availability
•In some sp. Male are not able to fertilize all eggs in one time
Garter
Rest for 24 hours
Zebra finch
Fife days to refill
Blue Crab
Fifteen day
Adder
Loses a lot of weight
Cost of sperm production
SlugSea slug
Caenorhabditis elegans
Hermaphrodite sp.Hermaphrodite sp.
Number of copulationsNumber of copulations
Lion
157 Copulatiuns in 55 hours
Number of copulationsNumber of copulations
CatRabbits
Female do not release egg unless she was stimulated “appropriately”.
Feret
Golden hamster
Rat
Crested tits
Giant water bug
More than hundred copulations in thirty-six hours
Sex for foodSex for food
Long-tailed fly Pisaura mirabilis
Utetheisa ornatrixMormon crickets
Sex for foodSex for food
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5QO02QC0UQUKIKEKQKTKKKUKHKNKRKO08QA0UQCK7KOK7K1K4KHS6QD05QV0KKD5QO02QC0UQUKIKEKQKTKKKUKHKNKRKO08QA0UQCK7KOK7K1K4KHS6QD05QV0KKD0QD0AQZSAQOKAQTKQKB0PQ.jpg0QD0AQZSAQOKAQTKQKB0PQ.jpg
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