Not an official term in genetics, but often used in reference to the founder, or parental, generation in a line of captive-bred organisms. Also used in aquarium literature to refer to wild caught fishes or a pair or group of assumedly unrelated individuals being used for breeding purposes.
Glossary: F0
Glossary: F1
Term used in the fields of genetics and selective breeding in reference to the first filial generation, i.e., hybrid offpsring, of a cross between two distinctly different parental lines. Often used in aquarium literature to refer to offspring of F0 parents whether of the same species or not.
Glossary: F2
Offspring of the second filial generation, resulting from a cross between F1 individuals. Future such generations are termed F3, F4, etc..
Glossary: facultative
Capable of functioning or existing under varying environmental conditions.
Glossary: falcate
Sickle-shaped.
Glossary: family
Taxonomic rank below order and above genus. Contains one or more genera.
Glossary: fang
Relatively long, sharp, pointed tooth.
Glossary: fanning
Process of moving water over eggs or fry via rapid movement of the fins, thus aerating or removing solid particles from them.
Glossary: fecund
Producing or capable of producing offspring or vegetation. Sometimes used in reference to particularly productive organisms.
Glossary: fecundity
Fertility.
Glossary: feeder fish
Live fish used specifically for feeding to another fish.
Glossary: feral
Existing in a wild or uncultivated state; returning or transferring to such a state having previously been domesticated.
Glossary: fertile
Capable of reproduction.
Glossary: fertility
The state of being fertile.
Glossary: filament
Thread-like, slender process or appendage; thin chain of cells.
Glossary: filamentous
Of, relating to, or resembling a filament.
Glossary: filial
Of, relating to or being a generation or the series of generations following the parental (F0) generation.
Glossary: filiform
Threadlike; shaped like a filament.
Glossary: filter
Device through which water is passed in order to remove suspended solid particles (mechanical filtration) or chemical impurities (biological filtration); any device which assists in maintenance of water quality.
Glossary: filter feeding
Feeding behaviour in which solid, organic particles are filtered from the surrounding water. Normally involves some degree of specialised morphology.
Product reviewers wanted
Hello! Very much interested in writing for you, please include me in the info. Thank you for the opportunity!
6th Sep 2020
Product reviewers wanted
I would be interested in reviewing products. Before retiring I was a technical writer and managed a Quality Management Program.
30th Aug 2020
Product reviewers wanted
I'm interested and can write reviews from the perspective of someone new to the hobby. I'm only 3-4 months in, but hopefully I can help someone that's...
23rd Aug 2020
Product reviewers wanted
I’m interested in doing this if there is still availability, it sounds like fun! Thanks
19th Aug 2020
Barbodes semifasciolatus – Golden Barb* (Barbus sachsii, Puntius schuberti)
I simply had a question (please forgive if this is not allowed, I read the FAQ but I was not sure). I was wondering if there is any evidence of offsp...
12th Aug 2020