Guppy sperm!!! - Tropical Fish Keeping - Aquarium fish care and resources
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post #1 of 5 Old 01-04-2010, 03:35 PM Thread Starter
Guppy sperm!!!

Hey, I have 6 beautiful guppies (3 males, 3 females - I know that is not a good balance but I had a couple of deaths when I was starting out and don't currently have room for any more).
I was just wondering if anyone knows more about the mating process. I know female livebearers can store sperm for months, but if she mates with another male will this 'replace' the original sperm she was storing? And does this only happen when she is in certain stages of pregnancy?
I would really like to learn all the ins and outs (pardon the pun!) of livebearer mating but can't find any detailed information on the internet or in the books I have.
I currently have around 90 guppy fry of various ages, including some my friend gave me as he doesn't have room in his tank. The oldest are around ten weeks and are just starting to get colour on their tails (all yellow).
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post #2 of 5 Old 01-04-2010, 04:00 PM
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I *think* new sperm replaces old sperm if the female is bred pretty much right away after the birth. I would assume that the mating would need to happen before she "takes" with the stored sperm.

(This is me guessing. I don't know for sure. :) )
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post #3 of 5 Old 01-05-2010, 05:48 PM Thread Starter
Thanks! How long does it take your fry to get their colour?
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post #4 of 5 Old 01-05-2010, 07:13 PM
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I don't know. I've never bred fish before.
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post #5 of 5 Old 01-06-2010, 07:59 AM Thread Starter
Ohhh, lol, I just assumed you had! I can't stop my guppies from breeding :)
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