Ichthyological terms, not general ones.
Coding system used to organise and refer to unidentified catfishes, though not necessarily undescribed or distinct species, of the genus Corydoras. Works in tandem with the similar CW number system. The system was invented by German aquarist Hans-Georg Evers and first appeared in the magazine 'DATZ' but is now in popular use worldwide.
Used in 67 profiles
Arranged like a series of combs or the wire bristles on a wool card. In ichthyology used most commonly to describe the form and arrangement of teeth in certain species.
The entire area drained by a given river or lake plus associated tributaries. Same meaning as drainage basin, river basin, watershed, etc..
Abbreviation of the word 'confer', meaning 'compare with'. Used in the fields of systematics and taxonomy to denote specimens or populations that resemble a described taxon but differ in some respects and thus may or may not represent a distinct species.
In ichthyology, any characteristic or its attributes used for recognising, describing, defining, or differentiating species, genera or higher taxa. Also used in phylogenetic analyses whereby ancestral (primitive) characters are termed plesiomorphic and derived (novel) characters apomorphic.
Used in 843 profiles
A group of organisms or populations coexisting and interacting with one another in a given region under relatively similar environmental conditions. The different organisms influence each other's abundance, distribution, and evolutionary adaptation.
Used in 875 profiles
Coding system used to organise and refer to unidentified catfishes, though not necessarily undescribed or distinct species, of the genus Corydoras. Works in tandem with the similar C number system. The system was invented by Ian A. M. Fuller in reference to his website 'Corydoras World' but is now in popular use worldwide.
Used in 65 profiles
Distribution.
Used in 39 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
A stream that has no permanent tributaries, often very short.
Used in 7 profiles
In biology, Darwinian fitness or simply fitness of a biological trait describes how successful an organism has been at passing on its genes. The more likely that an individual is able to survive and live longer to reproduce, the higher is the fitness of that individual.
Term used to describe a fish that is seen to be flicking or brushing its body against solid surfaces. Usually a sign of irritation and sometimes, but not always, a parasitic infestation or disease.
Divided or separated into two branches; shaped like a fork. Used to describe the shape of the caudal fin in some fishes.
Used in 106 profiles
Term used to describe water with a green-coloured, soupy appearance caused by an excess of phytoplankton in suspension, often as a result of eutrophication. Also known as an algal bloom.
Used in 7 profiles
Severe physical condition relatively common to certain fishes in captivity and also known as hole-in-the-head. Sometimes attributed to protozoan parasites of the genus Hexamita or an autoimmune disorder though these theories remains unconfirmed. Certainly associated with and exacerbated by poor water quality and/or nutrition, however. Initially manifests itself as small lesions, normally on the head of an affected individual, but may also extend along the lateral line and into the unpaired fins. If left unchecked these lesions can develop into larger, whitish pits and the condition may prove fatal. Often abbreviated to HLLE and similar to, but not analagous with, neuromastic pitting. Does not appear to occur in nature.
Used in 35 profiles
Tributary stream of a river close to or comprising part of its source.
Used in 167 profiles
The scientific study of water, its distribution, properties and effects on and within the Earth's surface and atmosphere.
Minor tributary stream or small river in the Amazon region, the name deriving from the native nheengatu language. It literally translates as 'canoe path' since most igarapés are navigable by canoe or small boat and they are traditionally important as a means of transport and communication.
Used in 22 profiles
Lance or spear-shaped; gradually tapering to a point. Used to describe the shape of a caudal fin with long central rays.
Used in 19 profiles
Crescent-shaped. Sometimes used to describe a caudal fin with a deeply emarginate shape.
Used in 8 profiles