Amphipoda


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Related to Amphipoda: order Amphipoda, amphipod

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 ?
Units Structural components Vegetation height cm Litter depth cm Soil water content % Soil salinity mS/m Soil diurnal temperature [degrees]C Biotic components Amphipoda Number/[m.
For the Brava Beach, the main taxa responsible for the similarities between samples were crustaceans of the class Amphipoda, with a similarity percentage of 18% for the samples collected with the grab and of 35% for the samples obtained using the prototype sediment sampler.
Amphipoda and Isopoda from 20 to 25 stations will artsidentifiseres, individkvantifiseres and biomass measured.
For example, the percentage of Amphipoda identified as prey items in the diets of post-metamorphs was much lower for Columbia Torrent Salamanders than for Southern Torrent Salamanders.
Amphipoda dominated both in terms of abundance and number of species followed by Polychaeta.
Studies on the genus Onisimus Boeck, 1871 (Crustacea, Amphipoda, Lysianassoidea, Uristidae).
Para cada item alimentario se indica el numero de individuos, frecuencias y sus respectivos porcentajes (%) Juveniles Adultos Numero (%) Numero (%) Coleoptera 64 34,2 7 3,32 Diptera 29 15,5 2 0,95 Hymenoptera 21 11,2 1 0,47 Hemiptera 10 5,3 0 0,00 Lepidoptera 1 0,5 0 0,00 Larvas de Insectos 36 19,3 1 0,47 Amphipoda 24 12,8 198 93,84 Arachnida 2 1,1 2 0,95 Indice de Simpson 4,75 1,13 Total Numero (%) Frecuencia (%) Coleoptera 71 17,8 10 90,9 Diptera 31 7,8 7 63,6 Hymenoptera 22 5,5 7 63,6 Hemiptera 10 2,5 3 27,3 Lepidoptera 1 0,3 1 9,1 Larvas de Insectos 37 9,3 8 72,7 Amphipoda 222 55,8 8 72,7 Arachnida 4 1,0 3 27,3 Indice de Simpson 2,97
In laboratory all invertebrates were picked out of the samples under stereoscopic microscope (MBS-10) and were sorted into 10 taxa (Chironomidae, Trichoptera, Amphipoda, Hirudinea, Oligochaeta, Gastropoda, Bivalvia, Ephemeroptera, Ceratopogonidae, and others).