Amphipoda

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Related to Amphipods: 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 ?
Impact of acanthocephalan parasites on aggregation behavior of amphipods (Gammarus pseudolimnaeus).
Amphipods {Gammarus pseudolimnaeus) are the most abundant shredder in the stream, comprising over 50% of the macroinvertebrates collected in leaf packs in Genesee Creek (J.
Similarity percentage analysis revealed that differences in epifaunal community structure on clam nets and those in uncultivated and harvest sites were primarily driven by high abundances of the decapods Hippolyte pleuracantha and, to a lesser extent, Crangon septemspinosa, and amphithoid amphipods associated with clam nets, and by the presence of the eastern mud snail Tritia obsoleta in the uncultivated and harvested sites.
2] of dry biomass (mean+standard deviation), respectively), presence of macroalgae (vegetated boulders, unvegetated boulders), presence of gammarid amphipods (present, absent).
Although the park seems far from civilization, it does face potential threats, and so does the little amphipod.
granifera invasion Lake Nhlange 189 Brachidontes 316 polychaetes virgiliae Lake Sibaya 864 oligochaetes 164 chironomid larvae 749 oligochaetes 1388 amphipods Lake Bhangazi 132 Melcmoides 166 oligochaetes tuberculata South 154 oligochaetes 425 chironomid larvae St Lucia 26132 Assiminea sp.
While amphipods above-ground move by jumping, the cave amphipod creeps slowly along cave walls, eating dead roots and organic material.
The second item in frequency in the stomach was shrimp, and in the intestine, amphipods (mainly represented by their tubes).
According to some authors (BOUSFIELD, 1982; FRIEND; RICHARDSON, 1986; LOPES; MASURANI, 2004a, b and c; RICHARDSON, 1992; ULIAN; MENDES, 1987) talitrid amphipods belong to the fauna that inhabits litterfall and are elements of the trophic chain of terrestrial ecosystems, as well as in the diets of birds and terrestrial planaria (LOPES; MASUNARI, 2004a, b and c).
Scientists from Oregon State University's Hatfield Marine Science Center confirmed the presence of dozens of species native to Japanese coastal waters--including barnacles, starfish, urchins, anemones, amphipods, worms, mussels, limpets, snails, solitary tunicates and algae--that were on a large floating dock in Japan that washed ashore at Agate Beach near Newport, Oregon in June 2012.