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Het OWA, het open archief van het Waterbouwkundig Laboratorium heeft tot doel alle vrij toegankelijke onderzoeksresultaten van dit instituut in digitale vorm aan te bieden. Op die manier wil het de zichtbaarheid, verspreiding en gebruik van deze onderzoeksresultaten, alsook de wetenschappelijke communicatie maximaal bevorderen.

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Community structure and vertical distribution of cyclopoid copepods in the Red Sea. 1. Central Red Sea, autumn 1980 Böttger-Schnack, R. (1990). Community structure and vertical distribution of cyclopoid copepods in the Red Sea. 1. Central Red Sea, autumn 1980. Mar. Biol. (Berl.) 16(3): 473-485 In: Marine Biology: International Journal on Life in Oceans and Coastal Waters. Springer: Heidelberg; Berlin. ISSN 0025-3162; e-ISSN 1432-1793, meer

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Beschikbaar in	Auteur
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Trefwoorden

Behaviour > Migrations > Vertical migrations Chemical elements > Nonmetals > Atmospheric gases > Oxygen > Dissolved gases > Dissolved oxygen Distribution > Geographical distribution > Vertical distribution Profiles > Vertical profiles > Salinity profiles Temperature profiles Temporal variations > Periodic variations > Diurnal variations Copepoda [WoRMS]; Cyclopoidea Marien/Kust

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Böttger-Schnack, R., meer

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Abstract

The species abundance, vertical distribution and diurnal vertical migration of cyclopoid copepods was analyzed in the central Red Sea in October-November 1980. Samples were taken to a depth of 450 m with a multiple opening-closing plankton net with 0.1-mm mesh-size. Selected important species were allocated to five different groups according to their depth distributions during daytime. The greatest number of species (9) was found in the lower epipelagic zone (40 to 100 m), below the strong seasonal thermocline. The lowest number of species (1) occurred in the upper part of the upper mesopelagic zone (100 to 250 m), which is characterized by a strong dissolved oxygen gradient. Five species had a bimodal vertical distribution, with dual peak abundances in the epipelagic and upper mesopelagic zones. Distinct differences in distribution patterns were noted between sexes and/or developmental stages. The vertical range of diurnally migrating species was small, usually less than 50 to 100 m.

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