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Please use this identifier to cite or link to this item: http://hdl.handle.net/1834/2568

Title: Zooplankton biomass in the reproductive area of the southern blue whiting (Micromesistius australis).
Other Titles: Biomasa del zooplancton en el área reproductiva de la polaca (Micromesistius australis).
Authors: Sabatini, M.
Alvarez Colombo, G.L.
Ramirez, F.C.
ASFA Terms: Zooplankton
Abundance
Size distribution
Biomass
Spawning seasons
Issue Date: 1999
Publisher: Mar del Plata: Instituto Nacional de Investigación y Desarrollo Pesquero
Citation: INIDEP documento científico, 5. p. 23-35
Abstract: Total and size-fractioned zooplankton biomass (larger and smaller than 5 mm) were analyzed over two cruises conducted in the late austral winter (September 1994 and 1995) in the area surrounding Malvinas Islands at the time that massive spawning of southern blue whiting was expected to take place. Biomass was rather uniformly distributed in the area and dominated by the fraction larger than 5 mm in which euphausiids and secondarily chaetognaths were dominating in terms of both weight and number. The smaller fraction was mostly made up of copepods. From the high occurrence of euphausiids and seasonal abundance of the several species of copepods normally present within the area it was hypothesised that the feeding requirements of juvenile and adult blue whiting as well as those of larvae and postlarvae may be met during the winter spawning season. The data were also examined in conjunction with the general pattern of zooplankton biomass occurring in autumn and spring in the Southern Patagonian shelf.
URI: http://hdl.handle.net/1834/2568
ISSN: 0327-9332
Appears in Collections:3. INIDEP Documento Cientifico

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