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Post by virusxe on Nov 25, 2010 15:35:53 GMT
How can one determen the gender of like GALS ?
ive read somwhere that GALS are not entirely hermafrodite and must mate in order to produce offspring.
correct me if im wrong.
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Post by 101100101111 on Nov 25, 2010 17:07:17 GMT
they are hermaphrodites, but this means that they have both male and female genital organs, but in the vast majority of cases, they must mate in order to fertilize eggs and breed. there have been some reported cases of snails self-fertilising however, but this is very unusual.
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coyote
Archachatina papyracea
Cochleas ego amo
Posts: 2,955
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Post by coyote on Nov 25, 2010 20:19:23 GMT
All land snails are hermaphrodite, and most cannot self-fertilize. And if they can, the eggs do not always hatch. So all are both male and female, but each needs another snail to reproduce.
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Post by Robert Nordsieck on Nov 28, 2010 5:52:39 GMT
Hi there, I got three families of land snails for you that are not hermaphrodites: Pomatiidae, Aciculidae and Cochlostomatidae, the latter is not present in Britain. Almost no species can reproduce exclusively by auto-fertilization, I think, because sooner or later the genome would degenerate. But there are snails (like the New Zealand Mud Snail, Potamopyrgus antipodarum) that reproduce almost exclusively by parthenogenesis, only lately have males been found, so sexual reproduction MAY happen... Besides, I know, that in the Roman snail (Helix pomatia) auto-fertilization does not happen, albeit hypothetically possible, because the sperm cells mature a lot earlier than the egg cells, which is why they will never meet. And during mating, the snail separates sperm duct and oviduct, so no own sperm cells can accidentally meet with own egg cells later. Regards Robert |
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