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Zooplanktonverbreitung und Hydrographie im Auftriebsgebiet vor Mauretanien, NW-Afrika, unter besonderer Beruecksichtigung der calanoiden Copepoden
Weikert, H. (1984). Zooplanktonverbreitung und Hydrographie im Auftriebsgebiet vor Mauretanien, NW-Afrika, unter besonderer Beruecksichtigung der calanoiden Copepoden. Meeresforsch. 30(3): 155-171
In: Meeresforschung = Reports on Marine Research. Berichte der Deutschen Wissenschaftlichen Kommission für Meeresforschung. G. Hempel: Kiel & Hamburg. ISSN 0341-6836, more
Peer reviewed article  

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Keywords
    Horizontal distribution; Hydrography; Population number; Upwelling; Vertical distribution; Zooplankton; Calanoida [WoRMS]; ASE, Mauritania [Marine Regions]; ASE, Mauritania, Arguin Bay [Marine Regions]; Marine

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  • Weikert, H.

Abstract
    Horizontal distribution and vertical zonation patterns of mesozooplankton abundance in the upper 60 m south of the Banc d'Arguin (17°N-19°N) showed relation to distinct hydrographic features and current patterns. The largest stocks of total invertebrate plankton as well as of many species were found in the oceanic region at temperatures greater than or equal to 18 °C. Salps outnumbered the calanoid copepods that formed the dominant group in the adjacent countercurrent and shelf zones. An along-shore northward transport of species by the countercurrent in the vicinity of the continental slope as far as Cape Blanc (21°20' N) was indicated by the presence of a characteristic fauna. The accumulation of calanoid exuviae and carcasses along the frontal zones of the countercurrent apparently coincided with the increased intensity of the upwelling circulation. The bulk of the 300 µm net zooplankton, including its most important taxa, was concentrated in the 0 to 30 m layer during both day and night.

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