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(invertebrate zoology)
A suborder of the crustacean order Copepoda, including the larger and more abundant of the pelagic species.



a suborder of planktonic invertebrate animals of the order Copepoda. Some zoologists consider Calanoida an independent order.

Calanoida are from 0.5 to 14 mm in size. The head is fused with the first thoracic segment, forming the cephalothorax, on which there are a nauplius eye and five pairs of appendages (antennae I and II, mandibles, and two pairs of maxillae). The thorax bears maxillipeds and five or four pairs of swimming legs. Respiration is effected by the entire body surface. The female deposits eggs in the water or carries them in an egg sac until giving birth. Calanoida feed on phytoplankton (only a few are predators) and are themselves the principal food of fish fry, plankton-feeding fish (such as herring, anchovies, sardines, and Pacific saury) and whalebone whales. More than 2, 000 species are known, belonging to 200 genera united in 30 families. They are widely distributed in marine and fresh bodies of water and are very numerous. (In the surface waters of the ocean there are up to tens of thousands of individuals per cubic meter.) The majority of marine Calanoida are characterized by luminescence. A typical representative of Calanoida is Calanus finmar-chicus.


Zhizn’ zhivotnykh, vol. 2. Moscow, 1968. Pages 406-10.
Brodskii, K. A. Veslonogie rachki Calanoida DaVnevostochnykh morei SSSR i Poliarnogo basseina. Moscow-Leningrad, 1950.


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Ontogenetic changes in copepod behaviour: an ambush cyclopoid predator and a calanoid prey.
The dominant calanoid copepod, Arctodiaptomus spinosus, is a typical crustacean of sodium lakes and a eurythermic species reproducing at a wide range of temperatures (Dokulil and Herzig, 2009).
Feeding behavior of newly settled winter flounder (Pseudopleuronectes americanus) on calanoid copepods.
Diet consisted mostly of harpacticoid, calanoid and cycloid copepods and other small crustaceans.
Spot postlarvae at MIM fed mostly on calanoid copepods soon after their arrival in the estuary during winter; however, consumption of polychaetes during the demersal postlarval and juvenile stages was uncommon.
06 (a) Copepods consisted of mature and copepodid, calanoid and cyclopoid species.
Historical biogeography and distribution of the freshwater calanoid copepods (Crustacea: Copepoda) of the Yucatan Peninsula, Mexico.
Calanoid, cyclopoid, and harpacticoid copepods were studied taxonomically.
During the summer many species of cyanobacteria, diatoms such as Asterionella and Fragellaria, dinoflagellates, desmids, calanoid copepods, and cladocerans are present whereas in the winter there are centric diatoms, calanoid copepods, the cyanobacterium Anabacna, and small flagellated algae.
Among various live food organisms, both calanoid and harpacticoid copepods have superior fatty acid profile [6,7], but the risk of disease from extensive culture methods has limited the use of copepods [8].
Pedro Barrios-Perez National Research Council Canada - Institute for Microstructural Sciences Ottawa, Ontario, Canada Opening in wrinkled photoresist (200x) Nomarski with Tone Reversal Matthew Cook University of Idaho, Manchester Research Station Port Orchard, Washington, USA Calanoid copepods (zooplankton) (50x) Stereomicroscopy with UV-b bulb placed next to stage Karl Deckart Eckental, Germany Ammonium oxalate crystal (25x) Differential Interference Contrast Dr.
While it is unclear how efficient copepods are in handling filamentous cyanobacteria in comparison to a filamentous Chlorophyta or Bacillariophyta, Burns & Xu (1990) found calanoid copepods significantly reduced both density and trichome length of filamentous cyanobacteria.