See diatom.
Glossary: diatomic algae
Glossary: diatoms
Plural of diatom.
Glossary: dichotomous key
Species identification key comprising pairs of alternative choices arranged in a series of couplets, used commonly in ichthyological papers.
Glossary: dichotomy
A division of organisms into two groups, typically based on a characteristic present in one group and absent in the other.
Glossary: dichromatic
Having two different colour forms independant of sex or age.
Glossary: dichromatism
The quality or condition of being dichromatic.
Glossary: dimorphic
Exhibiting dimorphism.
Glossary: dimorphism
In biology, the occurrence within a species of two forms which differ distinctly from one another in one or more characters, e.g., colour pattern or morphology.
Glossary: dioecious
Within a species, having the male and female reproductive organs in separate individuals.
Glossary: diploid
Containing two complete sets of chromosomes, i.e., one from each parent.
Glossary: disjunct
Distinctly separated from one another.
Glossary: dispersal
Distribution.
Glossary: dissolved oxygen
The concentration of oxygen dissolved in a water body. Normally expressed in milligrams per liter, parts per million, or percentage saturation.
Glossary: distal
Located away from the point or origin of attachment or a central point of the body. Opposite of proximal.
Glossary: distensible
Capable of being distended or extended; able to stretch.
Glossary: distributary
Type of stream or river that branches off and flows away from a main channel. Particularly common in river deltas, but also occur inland in some cases.
Glossary: dither fish
Fish or group of fish, typically inhabiting open water in the mid-to-upper water column, used by aquarists to reduce innate shyness in other species.
Glossary: diurnal
Of, relating to, or occuring during daylight hours; having a daily cycle. Opposite of nocturnal.
Glossary: diurnal rhythm
See circadian rhythm.
Glossary: divergence
The state of being divergent.
Product reviewers wanted
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6th Sep 2020
Product reviewers wanted
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30th Aug 2020
Product reviewers wanted
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23rd Aug 2020
Product reviewers wanted
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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