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Marine Biology

, Volume 112, Issue 1, pp 49–56 | Cite as

Spatial distribution and feeding rates of Centropages typicus in relation to frontal hydrographic structures in the Catalan Sea (Western Mediterranean)

  • E. Saiz
  • V. Rodriguez
  • M. Alcaraz
Article

Abstract

The relationships between hydrographic structures and some biological processes (distribution of biomass of phyto- and zooplankton, and feeding activity of Centropages typicus) were studied in May 1989 across a transect in the Western Mediterranean characterized by a density front. Feeding was estimated by means of pigment contents of guts and gut-clearance rates. The distribution patterns of the producers and consumers associated with the hydrodynamic structures agreed with previous descriptions for other similar fronts in the Western Mediterranean. Ingestion rates of C. typicus and grazing pressure were highly variable across the transect, and paralleled similarly variable gut-clearance rates. Although ingestion reflected phytoplankton (chlorophyll) abundance, the differences in food concentration seemed too low in comparison to the variability observed. Some phytoplankton properties such as cell size or chemical composition, which can be modified by hydrographic characteristics, or microscale turbulence, could be responsible for the considerable differences in feeding activity of this species in the various areas of the frontal system investigated.

Keywords

Biomass Chlorophyll Phytoplankton Distribution Pattern Cell Size 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1992

Authors and Affiliations

  • E. Saiz
    • 1
  • V. Rodriguez
    • 2
  • M. Alcaraz
    • 1
  1. 1.Institut de Ciències del MarPaseo Nacional s/nBarcelonaSpain
  2. 2.Departmento de Ecologia, Facultad de CienciasUniversidad de MálagaMálagaSpain

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