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 ?
Zooplankton, for example, have been observed to have only indirect effects on amphibians through phytoplankton consumption or through a shared predator (Davenport and Chalcraft 2012), and amphibians have been found to prey on amphipods (Cuello and others 2006; Gillespie 2013), but not the other way around.
When the tide is low and a high pressure cell above makes the sea as smooth as satin, I visit the seashore to sieve for amphipods. Such times are ideal as there is no wind to ruffle the water in the look box', which would make it impossible to see features of amphipods and make photography difficult.
These results suggest that the amphipod presents an increase in resistance to the toxicant as the salinity of the dilution water increases (Fig.
Parasite-induced suppression of aggregation under predation risk in a freshwater amphipod: sociality of infected amphipods.
The objectives of this study were to determine: (1) whether amphipods (G.
A partial explanation for this difference between the Virginia and New Jersey study sites may lay in the fact that macroalgae is more common in the harvested and uncultivated areas in New Jersey than in Virginia (see section on Macroalgal biomass below), and ampeliscid amphipods dominate abundance numbers by an order of magnitude in New Jersey relative to Virginia.
adspersus, mixed, none), Palaemon density (1 or 2 individuals per aquarium, which corresponded to 14 and 28 ind [m.sup.-2] or 1.49 [+ or -] 0.92 and 2.57 [+ or -] 1.06 g [m.sup.-2] of dry biomass (mean+standard deviation), respectively), presence of macroalgae (vegetated boulders, unvegetated boulders), presence of gammarid amphipods (present, absent).
Later that winter, Baker, Roberts, and other park staff visited the cave again to collect more amphipods, but when they arrived, the pool had dried up.
The Kauai cave amphipod, known locally as 'uku noho ana, resembles a shrimp with translucent white coloring--a common adaptation for those animals dwelling in perpetual darkness.
The spatial distribution of the amphipod may be related to limited availability of suitable refuges and behavioral responses to habitat heterogeneity, moisture, temperature, light, wind action, the amount of litter and soil Ph (GONGALSKY et al., 2005).