mesopelagic


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mesopelagic

(mĕz′ə-pə-lăj′ĭk, mĕs′-)
adj.
Relating to or inhabiting the layer of the water column in the open ocean that lies between the epipelagic and bathypelagic layers at depths of about 200 to 1,000 meters (656-3,280 feet).
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
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Persistent near-bottom aggregations of mesopelagic animals along the North Carolina and Virginia continental slopes.
The combined effects of coastline and bathymetry on the upwelling circulation may generate a spatially structured coastal habitat where three types (coastal, mesopelagic and bathypelagic) of fish larval assemblages can coexist.
Paedomorphosis (juvenile features retained in adults) is a mechanism of evolutionary change sometimes seen as simplification of the body, a feature common in mesopelagic animals (Herring, 2002) and may be the case with C.
Mesopelagic fish larval assemblages during El Nino-southern oscillation (1997-2001) in the southern part of the California Current.
Because of its low light levels and stable cold temperatures, the mesopelagic is similar in many ways to shallower benthic habitats of polar oceans, a region where some crustacean groups, most notably the amphipods, are quite successful (reviewed in Arntz et al., 1994).
In groups such Eastern Pacific bonito, mesopelagic fish and demersal fish, the main source of mortality is predation (M2) exceeding 90%; the coefficient of other mortalities (M0) is important in sardine and swordfish, also about 90%.
The effects are modeled with Monte Carlo methods and image transfer theory, using data collected from water types ranging from shallow coastal water to the deep mesopelagic zone (800 m).
Assemblages of vertical migratory mesopelagic fish in the transitional region of the western North Pacific.
Myctophids are typically pelagic fish of the open ocean (Hartel & Craddock, 2002) and, together with members of Sternoptychidae, Gonostomatidae, Chauliodontidae and the suborder Stomiatoidei, represent the characteristic families in mesopelagic depths (Haedrich, 1997).
Mesopelagic fishes spend most of their lives in a habitat lacking structure and have not been reported to seek structured habitats.
And finally there's the active biological pump, which is mainly in the form of migration by animals from the mesopelagic or 'mid-water' zone (200 to 1,000 metres deep) to the surface.