All my guppy fry females?

[Silverleaf209]

I recently had some guppies have fry and it seems that they are all female, I don't know if this is not normal, and a about a week ago some more guppies had fry and I am noticing the same thing, is this just a fluke or am I doing something wrong?

 

[JustAFishServant]

I know guppies in the wild can change based on conditions. Size, color, amount of fry, apparently even turning parthenogenetic (cloning).

I wouldn't be at all surprised if they can do all this in captivity too

 

[Silverleaf209]

I know guppies in the wild can change based on conditions. Size, color, amount of fry, apparently even turning parthenogenetic (cloning).

If someone said they do all this in captivity, I wouldn't be at all surprised

Really, I never knew that! Hmm . . . Can this be caused by stress? Just curious, how does the color make them want to change?

 

[Demeter]

Are you sure they are all female? Livebearers will all look female until they start developing their male characteristics. This seems to happen around 3 months of age, sometimes sooner/later.

Female guppies will always have a gravid spot. With my guppy fry I separate then genders before the males even start looking like males. I just move all the ones with the tiny gravid spot to another tank at around 1 month old. This can be tricky with the albino and blonde strains as their gravid spot is usually yellow/pink/orangish.

 

[Silverleaf209]

Are you sure they are all female? Livebearers will all look female until they start developing their male characteristics. This seems to happen around 3 months of age, sometimes sooner/later.

Female guppies will always have a gravid spot. With my guppy fry I separate then genders before the males even start looking like males. I just move all the ones with the tiny gravid spot to another tank at around 1 month old. This can be tricky with the albino and blonde strains as their gravid spot is usually yellow/pink/orangish.

I am not for sure but I can't tell a lot right now, the fish are pretty hard to ID, they are the offsprings of a pale yellow guppy, many of them have a black spots on their fins, this makes it had to tell, I am fairly confident about them all being female, I will keep checking though about the gravid spot! Thanks!

 

[emeraldking]

I recently had some guppies have fry and it seems that they are all female, I don't know if this is not normal, and a about a week ago some more guppies had fry and I am noticing the same thing, is this just a fluke or am I doing something wrong?

I am fairly confident about them all being female

Guppy fry will all look female from the start. Just the female fry will develop a gravid spot after a number of days after birth. The males won't show this but will have the female bodyshape for a while. That's normal.

Of course, a total batch of just male or female fry can be born. But happens not that often unless it's manipulated by man. Like turning up the temperature during the whole pregnancy of a female will result "mostly" (so, not a 100% guarantee but mostly works) in a majority of males. And a sudden switch to lowering the temperature during the whole pregnancy can result in a majority of female offspring. With dwarf livebearers such as Neoheterandria elegans and Heterandria formosa, it's the other way around.

 

[Silverleaf209]

Guppy fry will all look female from the start. Just the female fry will develop a gravid spot after a number of days after birth. The males won't show this but will have the female bodyshape for a while. That's normal.

Of course, a total batch of just male or female fry can be born. But happens not that often unless it's manipulated by man. Like turning up the temperature during the whole pregnancy of a female will result "mostly" (so, not a 100% guarantee but mostly works) in a majority of males. And a sudden switch to lowering the temperature during the whole pregnancy can result in a majority of female offspring. With dwarf livebearers such as Neoheterandria elegans and Heterandria formosa, it's the other way around.

Okay, so if they are all female it is very possible I did something? The only way I can tell if they are female is by looking for a gravid spot? Or is there another method? I am just thinking it will be kind of hard to see the gravid spot (I tried a few times) since they keep zipping around and majority have black spots on all of their fins.

 

[emeraldking]

Okay, so if they are all female it is very possible I did something? The only way I can tell if they are female is by looking for a gravid spot? Or is there another method? I am just thinking it will be kind of hard to see the gravid spot (I tried a few times) since they keep zipping around and majority have black spots on all of their fins.

Looking for the gravid spot is the best way to do it. Yes, there's also another method but hard for most people to see when those fry are very young. The analfin of a female guppy when young, the first fin rays of the analfin is a bit bend. While the first fin rays of the analfin of a very young male is straight. It takes a good eye to spot that.

Oh yes, tell me about it...! Those fry are pretty fast rascals to shoot a good picture of them.

 

[Silverleaf209]

Looking for the gravid spot is the best way to do it. Yes, there's also another method but hard for most people to see when those fry are very young. The analfin of a female guppy when young, the first fin rays of the analfin is a bit bend. While the first fin rays of the analfin of a very young male is straight. It takes a good eye to spot that.

Oh yes, tell me about it...! Those fry are pretty fast rascals to shoot a good picture of them.

Oh, wow! I never knew that, this makes a lot more sense now that I know this! I think I have seen a few of the ones with a slight bend, but not all so I guess they probably aren't all females!