Akasha72 said:
It's a good idea to remove any fry as male fry will eventually breed with their mother and sisters and this can lead to birth defects and it also helps to weaken the species.
In what way does it help to weaken the species , what problems have you had with breading Livebearers
Like any creature on the planet breeding mother's to son's father's to daughter's and sister's to brother's can cause birth defects. In fish it's usually bent spines ... this is what I've seen mostly.
I have read that it is this practice that has weakened what once were hardy fish. My Dad kept guppies and platies when I was a kid. They were seriously hardy and lived long lives. It's well documented that this is no longer the case
with due respect you read about some of the problems that can be caused by inbreeding of fish and assume that it’s a bad thing. What amazes me is when people talk about a fish with a bent spine and assume it’s to do with inbreeding .
A few things that can also cause bent spines for example disease, old age, incorrect feeding, temperature, and of course water quality.
I can remember more than 30 years ago going to my local pet store and buying some guppies and asking many questions on how to keep and breed them. The one thing that has always stuck in my mind was when the assistant said don’t let them inbreed as it can be bad. at first I worried about them inbreeding But Soon after and With success breeding loads of guppies I just let them get on with it
and let them inbreed with each other. I then started breeding sword tails, moly’s, and platies, all been bread in the same manner I rarely find any problems with inbreeding livebearers.
On a recent visit to a friends fish house and looking at some of he’s fancy guppies. he showed me a nice pair of top sword guppies that he had bought and a number of young that were all born deformed /bent spines he said the cause of it was through breeding brothers and sisters. I was not convinced. I asked if I could have some to experiment with he said of course and gave me two pairs.
They soon produced fry and have grown up into adults and are producing the next generation of fry so far they are all doing well I have not found any problems with deformities. i believe the cause of the problem may be due to a change of environments .