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Corpus Systématique Animale

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Initial observations of the zooplankton microdistribution on the fringing coral reef at Aqaba (Jordan)

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Springer (journals)
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  • R. Vaissière 1
  • G. Seguin 1
  • 1) Laboratoire de Biologie et d'Ecologie marines, Université de Nice, 28 Avenue de Valrose, F-06034, Nice cédex, France

Diurnal and nocturnal zooplankton was sampled simultaneously at the surface and at 35 m depth on the outer slope of the fringing reef off the Jordanian coast in the Guff of Aqaba, Red Sea, over a period of 8 d during July 1982. Complementary surface sampling was carried out above the reef and in the open sea in the morning and afternoon for a period of 5 d. Five groups of organisms were classified according to changes in their vertical distribution in the water column which is analyzed and discussed. Zooplankters of the first group appear to be positively phototactic (Calanus robustior, Mecynocera clausi, Oithona helgolandica, Corycella rostrata). Those of the second group also seem to be positively phototactic, but only as regards average and low light (moonlight) intensities (Nannocalanus minor, Acartia negligens, Sagitta enflata, S. hexaptera, Thalia democratica, Oikopleura fusiformis, O. longicauda). The zooplankton of the third group displays a negative phototaxis (Oithona nana, calyptopis and furcilia euphausiid stages, pelecypods and other mollusc veligers). Species exhibiting uncertain behaviour or caught in low numbers and exhibiting no particular distribution are relegated to the fourth and the fifth groups. The horizontal microdistribution of the zooplankton community is not easily discernible: certain neritic or oceanic affinities can be identified, however, by comparing the WP2 standard net surface samples collected above the reef with those from the open sea. The importance of zooplankton communities is emphasized, and the necessity of elucidating the temporal and spatial migrations and exchanges between reef and planktonic organisms in order to gain more insight into their trophic relationship with the reef system.

Catégories Science-Metrix
  • 1 - natural sciences
  • 2 - biology
  • 3 - marine biology & hydrobiology
Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
  • 4 - ecologie animale, vegetale et microbienne
Catégories Scopus
  • 1 - Physical Sciences ; 2 - Environmental Science ; 3 - Ecology
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Aquatic Science
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Ecology, Evolution, Behavior and Systematics
Catégories WoS
  • 1 - science ; 2 - marine & freshwater biology
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Marine Biology

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  • Mollusques
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