"F" class fish?

[ColeFishing]

What does it mean when someone says "F1", "F2", etc. I always guessed it was quality but I heard some one talking about "F" class fish in a breeding line of hybrids. Can some one explain what this classification means?


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[dragonfish70]

To put it in the simplest way lets say you have wild caught fish these would be pure showing the least amount of defects in their babies these are called f0 the original. Their babies are called f1. Now if those babies who are brothers and sisters have babies they now produce f2s and if the related f2s have kids tgey produce f3.Some people line breed to get that look of the fish they want but also increases deformaties. Some want the purest genes possible so they stick with WC(wild caught straight from their enviroment) or f1s from different batches. Happy to help in my knowledge


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[ColeFishing]

thanks, makes sense. so most store bought convict cichlids would be like F1000's lol.

 

[CatfishLuver]

They mostly stop counting after f3, but yes most petstore fish are very far from wildcuaght. Also, atleast around me f0, is very seldom used, I see more of WC (wild-cuaght) and then they start up with f1 after that.

 

[CichlidKevin]

Great info guys!

 

[ColeFishing]

Ok cool thanks. But what about blood parrots and flower horn. They are already manmade so how are they classified.


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[bassfisher91]

The most common usage of F1 in fish circles refers to generations away from wild; however, the term also has a genetics reference, in that it is the "First Filial" generation, or the first from a given pair of parents. F0 is only used for wild fish; when crossing varieties or linebreeding, the starting generation is known as P for Parent. So, while F1 usually means first generation from wild caught, it can mean something else, and should really be fully labelled as "F1 from Wild".

F0 x F1 still produces an F2 generation; otherwise, depending on the lifespan of the original wild fish, you could have several subsequent generations and still be claiming them as F1! The next generation is always the next number from the highest number of the cross, so F0 x F1 produces F2; F1 x F3 produces F4.

This is important because a lot of people place higher value on F1 fish because they are supposedly more likely to be a pure line, but that only applies if you obtain them from a knowledgeable breeder who has kept them in a single species tank setting.

F1 also means a tornado with wind speeds of 73-112 MPH

 

[bassfisher91]

Also, I don't believe that man made hybrids use the F system. Its a stretch but if they are mostly sterile, you could possibly call them all F0's if you really wanted to, although don't expect anyone to take you too seriously.