Cumacea

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Cumacea

[kyü′mās·ē·ə]
(invertebrate zoology)
An order of the class Crustacea characterized by a well-developed carapace which is fused dorsally with at least the first three thoracic somites and overhangs the sides.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Cumacea

 

an order of invertebrates of the subclass of higher crustaceans. The body measures 1–18 mm long (only a few species reaching 35 mm). There are two divisions, the cephalothorax and the narrow abdomen. The cephalothoracic carapace covers the three front thoracic somites and is fused with them. There is a single eye. Of the three pairs of maxillipeds, the first bears complexly constructed gills. In the female, the second and third pairs of maxillipeds have plates that form the brood pouch. The five free thoracic somites each have a pair of two-jointed limbs. Abdominal appendages are found only on the male. There are about 600 species, living primarily in the seas. They serve as food for fish. Members of this order have been acclimatized to some reservoirs (for example, Pseudocuma cercaroides is found in the Dnieper Reservoir).

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
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Ecological Taxon Category Frequency notes Americorophium Amphipod crustacean 0.71 TD, SDSS salmonis (Stimpson, 1857) Cumella vulgaris Cumacean crustacean 0.92 EFDF (Hart, 1930) Rochefortia spp.
Prey name %F %N %W Polychaeta (worm) 79.8 11.4 9.2 Gastropoda (snail) 14.0 0.8 0.4 Bivalvia (clam) 55.0 6.1 2.1 Cephalopoda (squid and octopus) 10.1 0.5 2.1 Copepoda 0.8 0.0 0.0 Peracarida Mysidacea (mysid) 31.8 11.5 0.2 Cumacea (cumacean) 13.2 0.9 0.0 Amphipoda (amphipod) 17.1 1.2 0.0 Euphausiacea (euphausiid) 15.5 10.0 0.7 Natantia (unidentified shrimp) 12.4 0.7 0.1 Caridea (shrimp) 12.4 1.2 1.2 Hippolytidae (shrimp) 17.8 1.2 0.2 Pandalidae (shrimp) 41.1 5.7 2.3 Crangonidae (shrimp) 76.0 18.9 13.3 Reptantia (unidentified crab) 11.6 0.5 1.9 Paguridae (hermit crab) 22.5 1.3 9.5 Decapoda Brachyura (crab) 0.8 0.0 0.1 Hyas sp.
72.5 1.0 12.5 918.8 Unidentified 2.0 20.0 12.5 275.0 Pisces Unidentified 2.9 19.0 12.5 273.8 km 26, San Pablo Bay (n=20) Crustacean Unidentified -- 2.9 5.0 -- Malacostraca Decapoda Crab megalopae 0.5 0.3 35.0 28.0 Mysidacea Unidentified 0.5 0.5 5.0 5.0 Cumacean Unidentified 61.7 17.9 50.0 3980 Amphipoda Gammaridea Ampelisca abdita 1.6 1.2 10.0 28.0 Corophium spp.
Other prey encountered at relatively high frequencies in stomachs of summer flounder (%F>1%) were polychaetes, cumaceans, clam siphons, and ostracods.
The rest of taxa: nauplii larvae, gastrotrichs, kinorhynchs, polychaetes, oligochaetes and cumaceans exhibited low relative abundances (below 1%) and scarce taxonomic representation.
The three types were ~30 copepods (100-400 [micro]m), 2 cumaceans (~600 [micro]m), and 2 zoea larvae (~1 mm).
Although gray whales were commonly seen feeding on benthic amphipods (Ampeliscidae) in the northern Bering Sea during the 1980s (Moore et al., 2000), a dearth of whales feeding there in 2002 (Moore et al., 2003) and recent reports of whales feeding year-round on epibenthic cumaceans (Diastylidae) offshore near Kodiak (Moore et al., 2007) suggest that gray whales may be altering their foraging habits offshore Alaska.
maclovinus was predominantly feeding on crustaceans, since amphipods, isopods, cumaceans, and decapods were the most abundant prey found in individuals from 61 to 240mm TL and from 180 to 700mm TL.
are different polychaetes and mollusks, and a whole gamut of smaller organisms (copepods, cumaceans, nematodes).
Ostracods, copepods, and cumaceans were found within stomachs from L.