Abstract
Fil: Mianzan, Hermes Walter. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Mar del Plata. Instituto de Investigaciones Marinas y Costeras. Subsede Instituto Nacional de Investigacion y Desarrollo Pesquero; Argentina
Highlights
Ctenophores were dominant in Region B, Río de la Plata, where the related species Mnemiopsis mccradyi and the cydippid ctenophore Pleurobrachia pileus comprised 81% of total org
It is well known that gelatinous macrozooplankton, reach important con*Received March 4, 1999
“jelly plankton” (Boero, 1991) and their periodic swarms have a noxious effect on many human activities such as tourism, fisheries, and industry
Summary
It is well known that gelatinous macrozooplankton (this includes members of the phyla Coelenterata, Ctenophora and Tunicata), reach important con*Received March 4, 1999. Mianzan and Cornelius, 1999). Good examples of these kinds of problems include: Pelagia noctiluca stinging swarms in the Mediterranean Sea Sandrini and Avian, 1991); Black Sea losses of millions of dollars of pelagic fisheries due to competition and predation by the ctenophore Mnemiopsis leidyi 1993), and clogging on the refrigeration inlet of power plants in the Baltic Sea due to swarms of Aurelia aurita (Möller, 1984). The above comments reflect the fact that the gelatinous plankton is well prepared to impact resources of a system under stress conditions, such as anthropogenic processes (overfishing, eutrophication of semi-enclosed areas), natural deviation from normal physical and climatic conditions, etc
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