Tropical Fish Keeping - Aquarium fish care and resources

Tropical Fish Keeping - Aquarium fish care and resources (http://www.tropicalfishkeeping.com/)
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-   -   why are deformities in fish so common? (http://www.tropicalfishkeeping.com/beginner-freshwater-aquarium/why-deformities-fish-so-common-47500/)

Inga 07-20-2010 12:38 PM

why are deformities in fish so common?
 
why are deformities in fish so common? I have read several threads on this forum and on others about people having fry in their tanks and how some of them are deformed. I also keep hearing people say they had deformed fish. Also, without even knowing it, I apparently had 2 deformed fish. I had purchased 4 of the same species and at least 2 of the 4 had some deformity? Why is this so common? Is this due to inbreeding or being raised in crowded or too small of environments? Could it be inappropriate diet or water conditions? Is it just normal for so many fish to be deformed and then in the wild, they simply don't make it long?

kitten_penang 07-20-2010 04:29 PM

inbreeding always causes deformation in any species. they are some deformity due to sickness ad bacterial infections during birth and they wont do well or are eaten up at a very young stage so we rarely see them in the wild example wild albinos of any species ;)

Tyyrlym 07-21-2010 02:44 PM

Inbreeding is the big one. Like kitten said in the wild these deformities get taken out of the gene pool very quickly.

I've heard it implied at times that high nitrate levels can have an effect on fry's development resulting in physical deformities if the levels are too high.


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