Development of similar forms or traits in related, but separate, species descending from the same ancestor, but occupying different clades.
Glossary: parallel evolution
Glossary: Paramecium
Genus of unicellular ciliate protozoa with a shape resembling a grain of rice, a number of species of which are cultured as live food for small fishes and fry.
Glossary: paraphyletic
In phylogenetics, a paraphyletic taxon is, loosely, an artificial grouping that does not include all descendants from the common ancestor of its members; monophyletic group from which one or more of clades is omitted in order to form an additional group.
Glossary: parasite
Organism that lives on or in a second, host organism of a different species, with the latter deriving no benefit or being directly harmed by the relationship.
Glossary: parasitic
Of, relating to, caused by, or characteristic of a parasite.
Glossary: parasitism
The relationship existing between a parasite and host; the state of being infested by or being a parasite.
Glossary: parasphenoid
Elongate bone located in the base of the skull in many vertebrate organisms.
Glossary: paratype
In zoological nomenclature, a specimen other than the holotype upon which a description is based, i.e., each specimen of a type series other than the holotype.
Glossary: parental care
See broodcare.
Glossary: parental family
Behaviour in which both parents equally share the duties of broodcare.
Glossary: parhypural
The most posterior hemal arch with an open canal through which the dorsal aorta passes.
Glossary: parhypurapophysis
Paired bony lateral extensions off the hemal arch of the parhypural. Also known as ‘hypurapophysis’.
Glossary: parietal
Of, relating to, or forming the walls or part of the walls of a body part, organ, cavity, or similar structure. Often used specifically in reference to either of a pair of bones forming much of the upper cranium.
Glossary: parthenogenesis
Method of asexual reproduction by which an unfertilized egg develops into a new individual exhibited by certain fishes.
Glossary: parts per million
Unit expressing the part of a whole number in units of 1/1000000. Abbreviated to ppm.
Glossary: parts per thousand
Unit expressing the part of a whole number in units of 1/1000. Abbreviated to ppt.
Glossary: paternal
Relating to, characteristic of, or inherited from the male parent.
Glossary: pathogen
Any agent causing disease or infection, especially a bacterium, virus, or other microorganism.
Glossary: patronym
In zoological nomenclature, a taxonomic name derived from the name of a person.
Glossary: patronymic
Of or derived from a personal or family name.
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