Ichthyological terms, not general ones.
Basic hereditary unit comprising a sequence of nuceleotides within a strand of DNA or RNA and occupying a fixed position on a chromosome. Generally determines a particular character or trait present in an organism by directing production and activity of RNA.
Used in 10 profiles
Branch of biology concerned with the study of heredity and variation of organisms; the genetic constitution of a single organism, species, or other taxonomic group.
Used in 4 profiles
An account of the direct descent of an individual or group from an ancestor; study or investigation of the evolutionary development of an organism(s) from older, related forms; a record, chart, or table depicting a pattern of descent.
Plural of genus.
Used in 874 profiles
Measure of the overall concentration of calcium, magnesium and other ions in a water sample with values usually quoted in units of degrees (dGH), of which 1 dGH corresponds to 17.848 ppm. Also referred to as total or permanent hardness.
Used in 59 profiles
The scientific name of a taxon with the rank of genus; the first part of a binomen or trinomen.
Used in 299 profiles
Branch of genetics biology concerned with cell structure and function, particularly that of chromosomes.
Species concept based on the evolutionary relationships among organisms, specifically using common ancestry and shared evolutionary history to define species. Under this concept a species is essentially the smallest group of organisms that share a common ancestor and can be distinguished from other such groups via phylogenetic analyses. Each such grouping constitutes a distinct branch on an evolutionary tree. Subspecies tend not to be recognised and it is generally less restrictive than the biological species concept. Often abbreviated to PSC.
Used in 1 profile
An organism belonging to the same genus as another.
Used in 697 profiles
Belonging to the same genus.
Used in 13 profiles
Production of electrical impulses in living organisms or tissues.
See ontogeny.
Method of asexual reproduction by which an unfertilized egg develops into a new individual exhibited by certain fishes.
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Of or relating to phylogeny.
Used in 488 profiles
The study of evolutionary relatedness among species or other groups of organisms. May be based on morphology, molecular data, or both.
Used in 3 profiles
Form of paedomorphism characterised by retention of juvenile features in an adult individual via accelerated maturation.
Undergoing accelerated sexual maturation, often with associated retention of juvenile features in adults.
Used in 16 profiles
Abbreviation for deoxyribonucleic acid, a double-stranded, self-replicating genetic material comprised of a chain of nucleotides. Present in nearly all living organisms and is the main constituent of chromosomes. DNA segments containing genetic instructions are called genes and normally direct production and activity of RNA.
Used in 11 profiles
Complex, genetically-determined sequence of behaviour, usually employing a combination of visual, auditory and chemical stimuli taking place before spawning. Either or both sexes may be the protagonist.
Used in 2 profiles
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.