Amphipoda

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Related to amphipod: order Amphipoda

Amphipoda

[am′fip·ə·də]
(invertebrate zoology)
An order of crustaceans in the subclass Malacostraca; individuals lack a carapace, bear unstalked eyes, and respire through thoracic branchiae or gills.

Amphipoda

 

an order of saltwater and freshwater invertebrate animals of the subclass of higher crustaceans (Malacostraca).

The size of Amphipoda is from 0.5 to 25 cm. The body is usually laterally compressed, but sometimes it is flattened from back to front. Amphipoda swim on their sides—hence the Russian name bokoplavy (side-swimmers). Amphipoda are dioecious; the males are larger than the females. The females deposit eggs in a brood chamber. Young Amphipoda are not much different from the adults. Almost 7,000 species of Amphipoda are known. They are especially widely distributed in the oceans, but they are also found in fresh water (rivers, lakes, and subterranean and cave waters).

Amphipoda carry on various activities: they bury themselves in the ground, build small houses, and live among algae and hydroids. Some of them swim in the depth of the water or float on its surface. Amphipoda are food for many edible fish (cod, flounder, herring, carp, and trout), seals, whales, and birds. Amphipoda include the pests Chelura terebrans, which gnaw wooden structures (docks and piles), and several species of the genus Gammarus, which eat anchored fishnets.

A. I. BULYCHEVA

References in periodicals archive ?
maclovinus probably represent items accidentally consumed during feeding on crustaceans and/or insects due to the common behavior arthropods such as the amphipods, isopods and insects in seeking refuge in filamentous microhabitats such as algae and other plants, reducing predator pressure and indirectly increasing the food offering of the substrate (Schneider and Mann 1991a, b; Penaloza, 1993).
There were thus four grazing treatments which, because insecticide primar ily affected amphipods, we refer to as: (1) "grazer-removal" (-amphipods/-fish), (2) "fish-dominated" (-amphipods/+fish), (3) "amphipod-dominated" (+amphipods/-fish), and (4) "fish+amphipods" (+amphipods/+fish).
The impact of the invasive amphipod Dikerogammarus haemobaphes on leaf litter processing in UK rivers.
Low abundances were observed during the El Nino period, coinciding with studies on specific taxonomic groups including copepods, euphausiids and amphipods (Ambriz-Arreola et al.
In many spring-fed streams of the midwestern United States, Gammarus amphipods are among the most important and numerically dominant shredder species (Heard et al.
Increased abundance of infaunal groups also has been observed in clam culture sites relative to uncultivated control sites (gammarid amphipods and nemertean worms: Thompson 1995; deposit-feeding polychaetes: Spencer et al.
E Brunton confirmed identifications of euphausiids, and EL Bousfield and CT Shih identified the amphipods.
Boulders with filamentous algae in the experiment served as an object of grazing for the palaemonid prawns and gammarid amphipods and as a refuge for gammarids.
Three species of wood borers were present on the test blocks: the isopod Limnoria tripunctata, the bivalve Lyroduspedicellatus and the amphipod Chelura terebrans.