Ichthyoplankton Associated to the Frontal Regions of the Southwestern Atlantic

  • Eduardo M. AchaEmail author
  • Martin D. Ehrlich
  • José H. Muelbert
  • Marcelo Pájaro
  • Daniel Bruno
  • Laura Machinandiarena
  • Mariana Cadaveira


The study region covers a wide latitudinal range, from 22°S to 55°S, and a bathymetric scope ranging from the coast to the shelf-break and adjacent region to a depth of ca. 1000 m. Hydrography of the region is extremely complex. Oceanographic structures are diverse, including several estuaries, water masses, wind systems, tidal regimes, and two major oceanic currents. A significant portion of the biological production is related to the existence of several marine fronts, characterized by different forcing, and temporal and spatial scales. Fish species that inhabit the region are diverse, covering a range of life strategies. Among those fishes that produce eggs and/or planktonic larvae, there are estuarine, shelf and oceanic forms, and species characteristic of tropical/subtropical or subantarctic waters. Pelagic species are more important in the northern part, while demersal species dominate the southernmost area. The region looks like an intricate mosaic of opportunities for life cycle closure of distinct species. Marine fronts seem to be the preferred areas to establish spawning and nursery grounds by fishes, and current knowledge allow to identify the elements of Bakun’s triad for several of those fronts.


Ichthyoplankton Fronts Larvae retention Bakun’s triad Southwest Atlantic Ocean 


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Copyright information

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Authors and Affiliations

  • Eduardo M. Acha
    • 1
    • 2
    Email author
  • Martin D. Ehrlich
    • 2
  • José H. Muelbert
    • 3
  • Marcelo Pájaro
    • 2
  • Daniel Bruno
    • 4
  • Laura Machinandiarena
    • 2
  • Mariana Cadaveira
    • 2
  1. 1.Instituto de Investigaciones Marinas y Costeras (IIMyC), Consejo Nacional de Investigaciones Científicas y Técnicas–Universidad Nacional de Mar del Plata (CONICET – UNMdP)Mar del Plata, Bueos AiresArgentina
  2. 2.Instituto de Nacional de Investigación y Desarrollo Pesquero (INIDEP)Mar del Plata, Bueos AiresArgentina
  3. 3.Laboratorio de Ecologia do IctioplânctonInstituto de Oceanografia, Universidade Federal do Rio Grande (FURG)Rio GrandeBrazil
  4. 4.Laboratorio de Ecología, Fisiología y Evolución de Organismos AcuáticosCentro Austral de Investigaciones Científicas (CADIC), Consejo Nacional de Investigaciones Científicas (CONICET)Ushuaia, Tierra del FuegoArgentina

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