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.
Water protection zone
The coastal strip intended to protect the water body from pollution, economic activity is strictly l..
Water regimen
Changes in the level and volume of water in rivers, lakes and swamps over time. It is characterized ..
Water resources
Almost all waters of the hydrosphere of any territory (region), country or globe are suitable for us..
Watercourse
A concept applicable to all water bodies characterised by the movement of water in the direction of ..
Waterfall
Water falling into the river from a ledge across the riverbed. Unlike river rapids, waterfalls are c..
Watershed
A line separating the surface water runoff on opposite slopes. The watershed is taken into account w..
Weber's apparatus
Bone system connecting the wall of the anterior part of the swim bladder to the inner ear cavity (la..
Winter spawning fish
Winter spawning fish - fish that spawn in winter - burbot, lake forms of whitefish.The burbot spawns..
Wintering pits
Wintering pits - places of mass congregations of fish in depressions of the bottom of rivers and lak..
Xanthophores
Xanthophores - pigment cells with pigment ranging from light yellow to dark orange, determining yell..
Xiphiidae
Xiphiidae is a family of fishes of the order Perciformes. Includes 1 genus with a single representat..
Yearling
A young animal in its second year of life. The term is usually used in relation to relatively long-l..
Yolk sac
The yolk sac is an organ containing a supply of nutrients. It is used to feed the fish larva at the ..
Zaberegi
Zaberegi - ice strips along the shores of rivers, lakes and reservoirs, with the rest of the water a..
Zakaznik
Zakaznik - temporarily protected natural water area, where certain types and forms of human economic..