Do a lot of cichlids produce fry that are single

[Maroonostrich]

I can't seem to get my hands on another female Golden Eye for love nor money- all not well in my tanks (see Emergency forum for the full gory details... )

My supplier has a tank full of males.

Apparently, so has my mail order company!


I believe Kribs produce fry of certain sexes depending on the PH.. is this also true for these Nannacara?

I am coming across males everywhere and in utter despair of finding a female.. why is it this hard? Does certain PH produce all male spawn?

 

[lucky62]

PH can affect the sex ratio in many fish , so I suppose it is possible .

I have one of each , after the eggs hatch the female chases the male away .......she's eaten 2 broods of fry .

Do you still have all 4 ?

 

[Maroonostrich]

Nooo it's all going so WRONG!!

At the moment I have 2, although I ought to have that on one of those flip counters as the number is changing regularly!!

2 went back to my supplier as males

2 died.. including my beautiful female, and after such high hopes! *sigh*

Now a third has died hours after arriving with me... so I don't feel I can assume full responsibility for him...

And I'm stuck back with 2 boys, I think!

AAAARGH all I want is a pair!

 

[BlueIce]

I bought 20 jade eye cichilds from a friend who bought over 100 from someone on aquabid.

Out of my 20-ONE was female.
Out of the ones he kept- ONE was female.

I've heard it said that ph and temp can have an affect on the gender...but as far as I know,no one has proven this.

 

[lucky62]

I've heard it said that ph and temp can have an affect on the gender...but as far as I know,no one has proven this.



I stand corrected , but it is likely

 

[BlueIce]

I've heard it said that ph and temp can have an affect on the gender...but as far as I know,no one has proven this.



I stand corrected , but it is likely

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lol
i wasn't correcting you just stating what i have read

 

[Peter Lovett]

Sorry but it has been proved that Ph and temperature does effect on some fish. Ph has an effect on PELVICACHROMIS specie and temperature having an effect on Apistogramma. High the temp the greater the chance of males.

 

[pnyklr3]

My cacatuoides breeder found out the hard way that pH and temp affected the male:female ratio. She used our local tap water (pH nearly 9) and mistakenly thought that temp played a higher role than pH in this case. She had a high temp to go along with the high pH. She ended up with 133 males and 1 female. THat was from a few batches of fry from a few different females. In the case of this apistogramma, higher pH = more males. She also found out when she was hatching eggs in a 5 gallon, that the fry had no tails due to nitrites in the water (the tank had gone through a mini-cycle). I'm going to look around at some websites I knowof...I think I've read of another breeder who has faced this.

Note: PH has been found to greatly effect the sex of Apistogramma cacatoides offspring. Low pH causes mostly females offspring while high pH causes mostly male offspring.

Link

NOTE: high temperatures combined with a high pH will cause a higher ratio of males to females in a spawn.

Link

 

[Peter Lovett]

Did she state what temp she spawned them at and did the temp remain constant.

I must admit I have never done a study on this myself mainly because i do not have the facility too do so. All of my information comes from Dr. Uwre Romer's atlas and the study witch got him is Phd.

All of his exspriment where carried out under lab conditions. Which means his results come from a constant enviroment of temp and PH.

Now his study show that higher temp and lower PH produce more males.

His results for cacatuoides are as follows as % Males .

pH 4.5 Temp 23c 0% male with 0 broods.
pH 5.5 Temp 23c 19.8% male with 5 broods.
pH 6.5 Temp 23c 0% male with 0 broods.

pH 4.5 Temp 26c 84.3% male with 5 broods.
pH 5.5 Temp 26c 62.7% male with 5 broods.
pH 6.5 Temp 26c 43.3% male with 5 broods

pH 4.5 Temp 29c 0% male with 0 broods.
pH 5.5 Temp 29c 83% male with 5 broods.
pH 6.5 Temp 29c 0% male with 0 broods

 

[Seb R]

Yup, my apistos, all male (I really wanted a few females, can't find them for love nor money!!)

 

[pnyklr3]

Hmmm, maybe I should start an experiment. I will be easy. I can start a new tank at local pH, keep the temp stable, and see what I get. After about five batches of successful fry-rearing, I'll switch to Neutral water, and see what happens, and then try to get the pH below that, blah blah blah....this is really starting to sound like a lot of work! I'm not going to have time for this between child raising, lesson-planning, and soccer coaching! Maybe one of you guys can do it!

 

[lucky62]

Hmmm, maybe I should start an experiment. I will be easy. I can start a new tank at local pH, keep the temp stable, and see what I get. After about five batches of successful fry-rearing, I'll switch to Neutral water, and see what happens, and then try to get the pH below that, blah blah blah....this is really starting to sound like a lot of work! I'm not going to have time for this between child raising, lesson-planning, and soccer coaching! Maybe one of you guys can do it!

[snapback]864597[/snapback]​

You could squeeze it in , but it may take some of the fun away

 

[Peter Lovett]

I would also like to add that it is just chance. Then water parameters affect the chance of the sex so even if you determine what water parameters you need to give you a 50:50 ratio then it will take up to 10 spawns to get it. Or at a pH of 6.5 and a temp of 26c. You can still get brood of 100% female and 100% male. But over time this will give you half female and half male. Complicated I know. Every time I spawn a fish I keep my finger crossed.