Why are some Fry called/classed as F1

[Lloydy]

Hi all,

I sometimes see L- number frys advertised as the following - F1 L411 fry for sale, F1 L046 Zebra Pleco for sale and so on.

What does the F1 mean? Is it a grading of the quality of the bloodline or something?

[MatsP]

F1 means the first captive breeding generation - that is, the parents were wild-caught [and supposedly not closely related].

F0 is wild-caught fish, F1 the first generation of offspring from F0, F2 is the offspring of F1, F3 the offspring of F2, etc. However, most people stop counting at F2. From then on they are just "captive bred".

--
Mats

[Mongo]

I'm not an expert in how fish are labelled.

While F1 is often allocated to first generation fish from wild.

It is also used when fixing lines in fancy fish and certain ornamental plants, the starting specimens for such projects being specimens that are far removed from wild.

Certain aquarists are labelling there fish F1 if both are bred from so called F1's obtained from different sources.

So answering the original post in the thread will obviously require an enquiry to the person who has labelled the fish as such as to what crireria they are using.

Mongo

[Jools]

Certain aquarists are labelling their fish F1 if both are bred from so called F1's obtained from different sources.

Indeed, http://www.planetcatfish.com/core/glossary.php#F0 - it's a system with a relative and not absolute starting point. Prevalent use is to accept that F0 are both w/c.

Jools