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(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 ?
90 Table 2: Species composition of meiobenthos from different shrimp culture ponds Major Groups New ponds Aged ponds Crustacea Copepoda Tisbe sp.
0,02 0,09 Moina micrura 1,70 8,23 neonata (neonate) 1,97 9,55 Copepoda * Argyrodiaptomus furcatus 7,69 37,82 * Thermocyclops decipiens 0,67 3,31 Copepoditos (copepodid) 3,62 17,78 Náuplios (naupplii) 8,36 41,09 Protozoa Difflugia sp.
Annotated list of the described species of parasitic Copepoda (Siphonostoma) from American waters contained in the United States National Museum.
RESULTS--A total of 32 species of Copepoda was recorded from samples obtained during this survey and 6 more were included from previous surveys.
Most taxa were identified to the species level: Oligochaeta and some smaller groups, by Tarmo Timm; Chironomidae, by Margit Kumari; Cladocera and Copepoda, by Kaidi Kubar; Ostracoda, by Kadri Sohar; and Nematoda, by Walter Traunspurger.
Pelagic YOY fed on chaetognaths, hyperiid amphipods, calanoid copepoda, and ostracods, and benthic YOY had a varied diet of fishes and benthic crustaceans.
Species Habitat Copepoda Acanthocyclops vernalis lentic (littoral) Cyclops exilis small streams Diacyclops bicuspidatus thomasi lentic (limnetic) Diaptomus pallidus lentic (limnetic) Diaptomus siciloides lentic (limnetic) Eucyclops speratus lentic (littoral) Macrocyclops albidus lentic (littoral, benthic) Mesocyclops edax lentic (limnetic Harpacticoid species lentic (limnetic, littoral, benthic) Cladocera Bosmina longirostris lentic (limnetic) Ceriodaphnia lacustris lentic (limnetic) Chydorus sphaericus lentic (limnetic) Daphnia ambigua lentic (linmetic) Daphnia laevis lentic (temporary ponds) Daphnia parvula lentic (limnetic) Diaphanasoma leuchtenbergianum lentic (limnetic) Lydigia quadrangularis lentic (littoral) Simocephalus expinosus lentic (littoral, benthic)