from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. a fish that travels between salt water and fresh water
from The Century Dictionary and Cyclopedia
- In botany, having all the nearly equal nerves proceeding in a fan-like, manner from the summit of the petiole to the margin of the leaf, as in the maidenhair-tree.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. (used of fish) migratory between fresh and salt waters
Sorry, no etymologies found.
The term "diadromous" refers to any fish that migrate between saltwater and freshwater.
Although the term "anadromous" refers only to those fish that spawn in freshwater and live most of their lives in saltwater, it is often used interchangeably with "diadromous."
There are numerous possible effects of climate change on a number of fish stocks, both those resident in freshwater and those that are diadromous (migrating between freshwater and sea water).
Most arctic diadromous species are actually anadromous (i.e., use estuarine and/or marine environments for feeding and rearing; and freshwater environments for spawning, early life history, and, in the case of most arctic species, overwintering); only freshwater eels (Anguillidae) and some lampreys (Petromyzontidae) are catadromous (i.e., breed at sea and rear in freshwater).
About 30 species within the arctic regions belonging to the families Petromyzontidae, Acipenseridae, Anguillidae, Clupeidae, Osmeridae, Salmonidae, and Gasterosteidae exhibit diadromous behavior (i.e., spend part of their lives in the marine environment and migrate to freshwater to spawn, or the converse).
The following paragraphs discuss the consequences of climate change for diadromous fishes.
Aquatic productivity and the evolution of diadromous fish migration.
Freshwater fisheries as described here include those for species that live their entire lives in freshwater, such as lake trout, and those for diadromous species such as Atlantic salmon.
Fisheries for arctic freshwater and diadromous fish are conducted in all polar countries including Canada, Denmark (Greenland), the Faroe Islands, Finland, Iceland, Norway, Russia, Sweden, and the United States (Alaska).
Catch composition in this LME is characterized by a strong prevalence of the freshwater and diadromous group, and rich salmon fishery.