pelagic zone

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pelagic zone:

see oceanocean,
interconnected mass of saltwater covering 70.78% of the surface of the earth, often called the world ocean. It is subdivided into four (or five) major units that are separated from each other in most cases by the continental masses. See also oceanography.
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Pelagic Zone


that part of a lake, sea, or ocean that is the habitat of pelagic organisms—plankton, necton, and pleuston. The pelagic zone is opposed to the benthic zone, that is, the bottom of the body of water, which is inhabited by benthos.

In oceans and seas, the pelagic zone is divided horizontally into two regions: the neritic (water above the shelf) and the oceanic (all the remaining water). Vertically the zone is divided, usually depending on the degree of illumination, into three regions: the euphotic (well illuminated), the dysphotic (feebly illuminated), and the aphotic (lightless). The zone is also broken down according to the distribution of life into the epipelagic, mesopelagic, and deep-water regions. In freshwaters, the pelagic zone is divided horizontally into two regions: the shore region (the water near the shore) and the pelagic region proper (all the remaining water). Vertically three regions are distinguished according to the rate of temperature drop: the epilimnion, the metalimnion, and the hypolimnion.

References in periodicals archive ?
Oyster harvesting appeared to have decreased the number of large oysters and to have increased the percentage of reefs that were nonliving by decreasing water column filtration and benthopelagic coupling.
The African sharptooth catfish, Clarias gariepinus (Burchell, 1822) is a benthopelagic, dioecious, omnivorous fish widely tolerant to extreme environmental conditions (Yalcin et al.
2002) and often are captured by benthopelagic trawls at depths greater than 200 meters (Joung & Chen 1992; Compagno et al.
lurida plays an important ecological role via benthopelagic coupling (Newell 2004), and because of the unique physical structure it provides for many other organisms such as larval fish and small invertebrates (Baker 1995).
The blurred lanternshark is both mesopelagic and benthopelagic, occurring over the outer continental shelves and slopes at depths ranging from 100 m to below 1,000 m.
The diet of these 8 whales was dominated by meso- and benthopelagic fishes that composed 98.
Two new species of the benthopelagic fishes of the genus Epigonus (Apogonidae) from the western tropical part of the Indian Ocean.
Food sources for larvae transported in near-bottom currents might include benthopelagic amphipods, like H.
Authority Bering Sea area Skalkin (1963) Southeastern Mineva (1964) Eastern Feder (1977, 1978) Eastern Allen(1) (1984) Southeastern Zhang (1987) Eastern Lang (1992) Eastern Authority Major food items Skalkin (1963) Benthic crustaceans, mollusks, polychaetes Mineva (1964) Bivalves, gastropods, polychaetes Feder (1977, 1978) Polychaetes, bivalves, amphipods, nemerteans Allen(1) (1984) Benthopelagic, epifaunal, sessil infaunal preys Zhang (1987) Polychaetes, amphipods, Echiura, Sipuncula Lang (1992) Polychaetes, amphipods, bivalves, decapods
In our study, we surveyed numerous benthopelagic species that were slowly moving when first observed in the video footage.