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 ?
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.
I'm certain there are other species, we just don't know how many," says Steve Taylor, a macroinvertebrate biologist at the University of Illinois at Urbana-Champaign who identified the amphipod and runs cave surveys in Great Basin.
While amphipods above-ground move by jumping, the cave amphipod creeps slowly along cave walls, eating dead roots and organic material.
While some amphipod species that inhabit shallow bays and basins have increased in abundance since Dreissena became established, partly because they can feed on mussel biodeposits, in theory, Diporeia does not feed on this material but depends more on freshly-settled phytoplankton (mostly diatoms).
Herbivores such as amphipods and isopods are negatively affected due to characteristics of their escape behaviour and hydrophobic properties of their body (Notini, 1978; Bonsdorff & Nelson, 1981; Bonsdorff, 1983; Elmgren et al.
Because the amphipod Orchestia gammarella represents one of the more abundant arthropods in west European salt marshes (e.
EPA bioaccumulation test method and other standard sediment bioassays such as the amphipod lethality, sea urchin fertilization, Microtox solid-phase and bacterial exoenzyme tests, which are currently recommended by Environment Canada for sediment assessment.
Even the Black-spotted Sweetlips from the Red Sea and a humble shrimp-like mesopalegic amphipod produced incredible footage.
The San Marcos gambusia (Gambusia georgei), Texas wild rice (Zizania texana), fountain darter (Etheostoma fonticola), Texas blind salamander (Typhlomolge rathbuni), Comal Springs riffle beetle (Heterelmis comalensis), Comal Springs dryopid beetle (Stygoparnus comalensis), and Peck's cave amphipod (Stygobromus pecki) are listed as endangered.
A variety of animals, including the young of commercially important fish, mollusks, and crustaceans, rely on cover afforded by shells piled in the troughs of shallow sand ridges caused by storm wave action, depressions created by crabs and lobsters, and the havens provided by worm burrows, amphipod tubes, anemones, sea cucumbers, and small mosslike organisms such as bryozoans and sponges.