Female to Male Guppies

Betta1 · 02-06-2007, 02:46 PM

Is it known to have guppies change from female to male in an all female environment? I keep finding males at a size you'd think to have caught it before then.

Kyoberr · 02-06-2007, 03:56 PM

Wow, that is really wierd. I don't know sorry. That is really interesting, maybe that happens.

doggydad38 · 02-07-2007, 02:51 PM

Guppy Designer website has an interesting article about this occurence. Though I've never had it happen with any of my lines, it does occur more frequently than you'd think.
Tony

Ringo · 02-07-2007, 03:10 PM

I've read that guppies can change their sex, I don't ever remember having it happen to me for I've kept many before.
In that past I have had mollies change sex. This morning I noticed that one of mine is now a male, which he was a female not to long ago

If I see one fry in that tank....

Damon · 02-07-2007, 03:12 PM

Females can change sex, but not the other way around.

**TheOldSalt** · 02-07-2007, 05:45 PM

It's MUCH more common among many other livebearers like mollies, platies, and swordtails, but Guppies will certainly do it.
Being in an all-female environment is a chief cause of it, in fact. Some breeders will keep a little breeder net in the tank with some males in it just to prevent it. On the other hand, too much testosterone in the water, like from overcrowding and dirty water, can also cause the change.

02-06-2007, 02:46 PM	#1
Betta1 Senior Member Join Date: Jan 2007 Posts: 348	Female to Male Guppies Is it known to have guppies change from female to male in an all female environment? I keep finding males at a size you'd think to have caught it before then.

02-07-2007, 03:12 PM	#5
Damon Aquatic Naturalist Join Date: Jan 2005 Location: Dayton, Ohio Age: 32 Posts: 14,971	Females can change sex, but not the other way around. __________________ For in much wisdom [is] much grief: and he that increaseth knowledge increaseth sorrow. Member of the AGA (Aquatic Gardner's Association) Member of the IBC (International Betta Congress)

02-07-2007, 05:45 PM	#6
TheOldSalt Darth Ichthyos Join Date: Jan 2005 Posts: 4,532	It's MUCH more common among many other livebearers like mollies, platies, and swordtails, but Guppies will certainly do it. Being in an all-female environment is a chief cause of it, in fact. Some breeders will keep a little breeder net in the tank with some males in it just to prevent it. On the other hand, too much testosterone in the water, like from overcrowding and dirty water, can also cause the change. Last edited by TheOldSalt; 02-07-2007 at 05:48 PM.

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02-06-2007, 03:56 PM	#2
Kyoberr Common sense isn't common Join Date: Dec 2006 Location: Utah Posts: 412 Blog Entries: 1	Wow, that is really wierd. I don't know sorry. That is really interesting, maybe that happens.

02-07-2007, 02:51 PM	#3
doggydad38 Senior Member Join Date: Jan 2005 Posts: 198	Guppy Designer website has an interesting article about this occurence. Though I've never had it happen with any of my lines, it does occur more frequently than you'd think. Tony

02-07-2007, 03:10 PM	#4
Ringo I'm just a Twig Join Date: Apr 2006 Location: The Sticks Age: 16 Posts: 961	I've read that guppies can change their sex, I don't ever remember having it happen to me for I've kept many before. In that past I have had mollies change sex. This morning I noticed that one of mine is now a male, which he was a female not to long ago If I see one fry in that tank....

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