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Sandy - We had a total of about 15 spawns reported in. Most of the spawns we tallied had a PH higher than 7.0 and were mostly male spawns. But 2 different breeders posted information to the opposite effect. In other words, their spawns were below 7.0 and were male, and spawns higher than 7.0 turned out to be female. Our conclusion is that there are other factors involved. Some breeders suggested the age of the female as a factor.Because the spawns with the differing results were on the opposite side of the country, I myself wonder if other minerals in the water have some effect.
- Jan 14, 2001
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Michelle M. - My spawn of yellows/chocolates is maturing now, and again, the ratio of males is overwhelming. pH definitely seems to affect the sex of bettas.
Next spawn, I'm going to lower the pH from 7.8 closer to 7.3, and we'll see if that produces a more mixed ratio. Thus far, at 7.8, ALL of my spawns have been all or very close to all males (makes it kind of difficult to sell pairs :-)
- Dec 26, 2000
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- in my experience, temperature is the key. make sure your thermometer is accurate, the stainless steel hang-on types can be off quite a bit. temps over 80, more males. under 80, more females.
- Aug 6, 2002
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stomkat - The first two spawns were kept at 80f, in water of 7.0-7.2 pH. The melano spawn yielded 2 males, the opaque spawn is all female.
I have 2 new spawns being kept in the exact same parameters. I will let you know if I have the same results of mostly female.
I will be spawning 2 pairs of the melano fry. I think I will lower the tank's temperature to 76f-78f to see if this may change the ratio, causing more males.
- Dec 21, 2000
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stomkat - My spawn of all females is from a female who was 6 months old, so it must relate to pH.
It seems a higher pH creates a greater number of males...interesting.
- Dec 21, 2000
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- TO me this is very interesting, I will remember this when i breed my bettas ( haven\'t yet *sigh*). But im only 13 so i still have more to learn.
- Apr 8, 2002
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Michelle M. - Well, so far my spawns have been EXTREMELY male dominant.
pH 7.8, temp. 80F
The first two spawns were with the same female (one spawn = no females, 2nd spawn = 4 females). The current yellow/chocolate spawn that's growing out shows many males. I've seen a couple that are for sure female. I'll post how that comes out.
- Dec 21, 2000
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Goh - To increase the count of males in a spawn, translated from a web posting word in Bahasa Indoesian : "The technique of hormone application is by
soaking the betta eggs at the eye-spot phase
(+30 hours after fertilization) into a 17-Apha
methyltestosterone hormone solution of
20mg/litre concentration for 8 hours.
The hormone solution is prepared by
dissolving 20mg of the hormone into 1
millilitre of 70% vol alcohol & subsequently
mix it into 1 litre of the water which is used
for soaking."
- Jan 16, 2001
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Angie - For comparison, my pH is 7.4, my temp set at 80F degrees, and my spawns tend to be male dominant. The temperature usually rises to 82 - 84F when I cover the spawning tanks and they stay that way until I start jarring the fry.
I have had one spawn that was female dominant though. Absolutely, the same conditions as described above. But the female I used was older (maybe already over a year). I've heard some people claim that older females produce higher female ratios. Maybe that is true? I don't know with only one spawn turning out this way. But it might be something to think about when pairing up for your next spawn.
- Dec 21, 2000
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