(redirected from Copepods)
Also found in: Dictionary, Thesaurus, Medical.


(invertebrate zoology)
An order of Crustacea commonly included in the Entomostraca; contains free-living, parasitic, and symbiotic forms.



an order of invertebrate animals of the class Crustacea. Copepoda are from 0.1 to 13 mm in size. A streamlined body with strongly developed extremities, which carry long falling antennules, is characteristic for Copepoda living mainly in the water, whereas Copepoda living near the bottom have thickened bodies and short extremities. Parasitic Copepoda have strongly adapted bodies in accordance with their modes of existence. Copepoda show various colorations. Specific (copepodan) stages of metamorphoses are characteristic of the Copepoda; they occur after the nauplius stage. Copepoda are distributed everywhere, in sea and fresh water. In the sea they constitute up to 90 percent of the plankton. Copepoda, particularly the large types of the calanides (Calanus finmarchicus, C. plumchrus, Eucalanus bungii, Pseudocalanus elongatus, and others) and the cyclopeds (Oithinia similis), have great practical significance, as feed for many commercial fish (herring, sardines, anchovies, and sprats) and for the young of almost all fish. In addition, Copepoda feed the baleen whale. A genus of Copepoda (the Cyclopes) are the intermediate hosts for certain worms (tapeworms and round worms) that are parasitical to humans and can cause serious illnesses, such as guinea worm. Certain maritime Copepoda are parasites on worms, ascidians, fish, and whales. The freshwater varieties are parasites on fish and often cause massive kills in the pond and lake fish industry.


Zhizn’ presnykh vod SSSR, vol. 1. Edited by V. I. Zhadin. Moscow-Leningrad, 1940.
V. A. Dogel’. Zoologiia bespozvonochnykh, 5th ed. Moscow, 1959.


References in periodicals archive ?
There also is fossil evidence suggesting that harpacticoid copepods of the genus Cletocamptus and also some cyclopoid-like forms were present in the region during the Miocene (Palmer, 1960).
The effect of formalin fixation on the dry weight of copepods, with special reference to Eurytemora affinis (Poppe, 1880).
Copepods and insects are both members of the Phylum Arthropoda and are separated from one another based on morphology of mouthparts, antenna, wings and segmentation.
Copepods from the cenotes and caves of the Yucatan Peninsula, with notes on cladocerans.
No clear correlation has been demonstrated between temperature and total zooplankton abundance in the Gulf of Riga, although the abundance of copepods increases with temperature.
The researchers gathered copepods from eight coastal locations and brought them into the laboratory, where they exposed the creatures to warmer water temperatures through up to 10 generations.
With respect to copepods, the challenge is to identify and understand each message in order to track down the causes of population changes.
For example, during the PDO phase switch in the late 1970s, 28% of the copepod species sampled increased in abundance.
Size, behaviour and acquisition of ectoparasitic copepods by brook trout, Salvelinus fontinalis.
5200 years ago leading to an increase in marine fungi and the first occurrence of marine copepods.