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 ?
They were identified simply as Amphipoda at FWS5, and to Hyallela (most likely Hyallela azteca) at NPS1, NPS2, and IDEM1.
Pisidium Sphaerium Phylum Arthropoda Branchiopoda "Cladocera" Amphipoda Hyalella C C unident.
Site Time X Variable Time Treatment (Treatment) Treatment N All taxa *** ns ns *** Amphipoda *** ** ns *** Polychaeta *** ns ns ** Gastropoda *** *** P > 0.
plana ENS razor clam Ensis directus MYT blue mussel Mytilus edulis MUL dwarf surfclam Mulinia lateralis POLY Polychaeta all AMPH Amphipoda all SHR shrimp Crangon septemspinosa, unid.
Porifera sponge dead Porifera boring sponge dead Annelida: Polychaeta serpulid #1 dead Annelida: Polychaeta serpulid #2 dead Annelida: Polychaeta spirorbid #1 dead Annelida: Polychaeta spirorbid #2 dead Arthropoda: Crustacea: Balanus glandula dead Cirripedia Arthropoda: Crustacea: Chthamallu dalli dead Cirripedia Arthropoda: Crustacea: Paracerceis cordata dead Isopoda Arthropoda: Crustacea: Gammarid amphipod dead Amphipoda Arthropoda: Crustacea: ?
1970, Karatayev & 1998a) Lyakhnovich 1990) Amphipoda Positive (Karatayev & Positive (Darrigran et al.
Other prey taxa were minor components of the diet, except for Salpidae (Mason, 1976; Eggleston and Bochenek, 1990) and Amphipoda (Dragovich, 1970) for juvenile bluefin tuna.