Hello All, I have two Blue Jack dempseys, and a regular jack dempseys... how to sex? could someone sex if they seen pics?
thanks!
thanks!
Sexing dempseys?
- Thread starter PmAn2k3
- Start date
How large are they? For the most part, sexing won't be easy until they are at least 3-4" and it is iffy even then. Blues are probably harder to sex.
One is about 2-2.5" long, the other is about 4.5-5 (thats the blues) the regular Dempsey is about 2.5-3" long, I think the biggest blue is a female and is prganant, he/she has been in his/her cave for numerous days, his/her belly bloated and very tempermental... So I was wondering if I could see for sure if it is a female, and if it is if its prganat, and then I would hope my other blue is a male, then I would try and succeed at breeding them...
Thanks
Thanks
Due to BD has recessive genes, you have to breed BD with a JD to get healthy fry. If you try to breed BD with BD, their fry will die within few days or that they will never fertilize.
Here is how Jeff Rapps described the breeding process.
"The blues have a hard time breeding with each other because they are the result of recessive genes. Although they can spawn, fertilization is very poor. Not 100% infertile, but few fry will free swim and it's likely none will last more than a few days.
However, when bred back to a regular dempsey, the resulting fry are robust. These fry (from a blue x regular dempsey) will appear nearly normal in color, but carry the gene for 'blue'. I have seen them and they are actually more blue than regulars, but would never pass for a 'blue dempsey'.
Now when these fish are raised up and spawned to either each other or back to another blue, the resulting fry will contain up to 25% blues. The rest will again appear nearly normal in color, but again, carry the gene for 'blue'.
"
Here is how Jeff Rapps described the breeding process.
"The blues have a hard time breeding with each other because they are the result of recessive genes. Although they can spawn, fertilization is very poor. Not 100% infertile, but few fry will free swim and it's likely none will last more than a few days.
However, when bred back to a regular dempsey, the resulting fry are robust. These fry (from a blue x regular dempsey) will appear nearly normal in color, but carry the gene for 'blue'. I have seen them and they are actually more blue than regulars, but would never pass for a 'blue dempsey'.
Now when these fish are raised up and spawned to either each other or back to another blue, the resulting fry will contain up to 25% blues. The rest will again appear nearly normal in color, but again, carry the gene for 'blue'.
"
Didn't you read the quote from Jeff I posted here?
You have to breed the bd with jd to get the generation that contains the recessive genes. raise the fry to spawning age...breed with each other or with another bd...then "the resulting fry will contain up to 25% blues. The rest will again appear nearly normal in color, but again, carry the gene for 'blue'. "
You have to breed the bd with jd to get the generation that contains the recessive genes. raise the fry to spawning age...breed with each other or with another bd...then "the resulting fry will contain up to 25% blues. The rest will again appear nearly normal in color, but again, carry the gene for 'blue'. "
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