Inbreeding ?

[slipshodman]

So i figure there are a lot of inbreed fish out there
And also assume that the more inbreed they are the weaker their DNA becomes just like in humans and are susceptible to shorter life spans, mutations and disease

But it does make me wonder if fish would inbreed in the wild, i would assume they would if there were no other options as instinct would take over

And would this not be the one reason for the creation of new lines/variations of fish as inbreeding would carry on a certain strain like coloring or shape

Certain shapes and coloring's of the same fish but from differing areas of a lake

I suppose on the other side of that is cross breeding and what variants you may breed from that and are they considered new breeds or just bitza's

Sorry , just thinking out loud and interested in peoples thoughts

 

[Audaxcity]

Inbreeding can totally happen in nature. Fish can't tell if that juicy piece of eye-candy on the other side of the driftwood is it's own sibling or not. But the habitat is usually large enough that chances of breeding with a close relative is pretty low.

If not however, it creates a genetic bottleneck in a population. Low diversity becomes a problem, but the combination of isolation and inbreeding can also cause mutations to make new variants, which is one of many driving factors for evolution.

In fact, our own species is the result of heavy inbreeding from a genetic bottleneck.

 

[duanes]

Out of 1000 eggs in a spawn in nature, if one individual survives to maturity, that is usually considered success.
That said, in some cenotes in Mexico, you see snub nose jack dempseys, some where almost all have extra blue, some cenotes where the blue is almost non-existent. So this may indicate in some tiny bodies of water, where inbreeding is unavoidable. Or is it that certain colors, and body shapes are more conducive to certain habitats, and end up making it to spawning size, while other adaptations don't?
In some small cenotes the uropthalmus are shaped more like Vieja than Mayaheros, and grey in color.
027 zps4b102ffd
In another they more closely resemble what we think of as Uros
Azul imovie edit

 

[Hendre]

And would this not be the one reason for the creation of new lines/variations of fish as inbreeding would carry on a certain strain like coloring or shape

This I attribute to genetic variance in different populations. Just because they look similar doesn't necessarily mean inbreeding...

The smallest barriers can cause different looking populations, or just slightly genetically different types. Such as on the congo rapids

 

[Deadliestviper7]

limited inbreeding is usually ok, but excessive inbreeding often leads to health and immune problems.

 

[bobblehead27]

Inbreeding isn't necessarily bad if proper culling occurs, as it would in nature .In nature the fish born with disfigurements or disorders would die and wouldn't pass those genes. Only the strongest couple would survive to mate. The problem is in captivity, people try to keep as many as possible. And over time slight genetic deformities become more prevalent as the generations go on.

 

[RD.]

https://www.monsterfishkeepers.com/forums/threads/inbreeding.709538/