Dictionary of Ichthyology
This dictionary of ichthyology contains specialist terms used in the teaching of undergraduate students. The terms are arranged alphabetically for ease of reference.
In addition to ichthyology, terms from hydrobiology, zoology, anatomy, fish farming and other related disciplines are included.
Where terms have different interpretations, we have assigned the most common interpretation in our view.
This dictionary is constantly being added to and modified.
If you do not agree with the above interpretation of the Terms, please explain your understanding in the comments to these Terms.
We invite you to participate in the development of a modern ichthyological vocabulary.
We will consider any criticism and take it into account when describing dictionary terms.
Snout
Snout - the space from the beginning of the head to the anterior margin of the eye. The length of th..
Sockeye salmon
Sockeye salmon (Oncorhynchus nerka) is a passage fish of the salmon family. It reaches a length of 8..
Sonar
An acoustic device that surveys the water column horizontally. In fisheries, it is used to detect a ..
Source
Source - the beginning of a river or the place from which a constant current appears in the riverbed..
Space behind the eyes
Space behind the eyes - the retraction of the head from the posterior margin of the eye to the most ..
Sparidae
Sparidae is a family of fishes in the order Perciformes. The body is compressed at the sides. The do..
Spawning
Spawning is the process of hatching of sexual products by fish, carried out at night (burbot) or ear..
Spawning season
Spawning is the process of removal of mature eggs by fish. A distinction is made between fish with s..
Species (biological)
The aggregate of individuals that form geographically or ecologically dispersed populations that sha..
Species composition
A list of fish species that live in a certain body of water or watercourse.Species composition is th..
Species diversity index
Species Diversity Index - allows to assess the structure of a community by comparing the characteris..
Species endemic
This is the state of a species in a particular geographical location, such as an island, state, coun..
Species fecundity
The number of eggs hatched by a female of a given species during her lifetime is calculated as the p..
Species-indicators
There are indicators created by nature, living and very sensitive. They are organisms that react to ..
Sperm
From Ancient Greek σπέρμα genitive σπέρματος here "semen" + ζωή "life" + εἶδος "kind, appearance", L..