The snails sexuality
The snail is hermaphroditic, i.e. he is
same time male and female. Nevertheless, this hermaphrodism isn't
simultaneous but proterandric: the male genital products (spermatozoa)
become ripe before the genital products females. The same individual is
thus able to produce spermatozoa and
ovules, but the auto fecundation being impossible, he must have to mate
a partner: it's a cross fecundation.
two snails meet and that the season of
the loves, they begin by kisses: those
are the preliminaries.|
But the snails doesn't go directly
from these preliminaries to copulation.
between the two, there is a phase called "Dart -
snail, next to its head, has a muscular pouch. This muscular pouch, at
a moment of the preliminaries, open
and release a dart, an arrow, then, Cupid's arrow.|
arrow will go and get imbedded between the head and the shell of the
partner. And this... the fact of being pricked by this dart, by this
small arrow, will bring they to copulate.
investigation recently revealed that the "dart of love" is rather a
means of injection. By using this dart, the snail giver injects at the
recipient a mucus containing several types of hormones. |
hormones affect the genitals organs females of receptive snail.
dart of Cupidon in front of a decimeter: almost 1 cm!!!|
as this moment, where the partner was stimulated, the copulation will
be able to start.
They will emerge their penis from we don't where, but
under the right eye. |
Then, our two
accomplices exchange their small bag, called
spermatophore, containing the spermatozoa.
the miracle of biology, our two male snails transform
themselves into female, to produce ovules, which will be fertilized by
the stored spermatozoa of the partner.
act will last several hours (approximately 10-15).
There 15 to 20 days later, the
snail will dig a hole of a few centimetres of deep. The
quantity of eggs layed is
a hundred (that depends of the race, the age, etc...).
process of egg-laying. Time is indicated here as hours:minutes|
later, it's the hatching ....
The youngs have translucent shells.They
will leave the nest to become adult like their parents.
arriving there, much will have died (dryness, floods,
predatory, pesticides, etc.....)
It's what explains
the significant number of eggs: a few will arrive at the
adulthood (2 years).
It's the life......