Distribución vertical de zooplancton en El Embalse Arenal, Costa Rica

• Umaña, Gerardo ^[1] ; Villalobos, Federico ^[1] ; Bofll, Beatiz
  1. [1] Universidad de Costa Rica

     Universidad de Costa Rica

     Hospital, Costa Rica

     
• Localización: Revista de Biología Tropical, ISSN 0034-7744, Vol. 45, Nº. 2, 1997 (Ejemplar dedicado a: Volume 45 – Regular number 2 – June 1997; 753–771)
• Idioma: español
• Títulos paralelos:
  • Distribución vertical de zooplancton en El Embalse Arenal, Costa Rica
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• Resumen

  • The vertical distribution of Bomina, Daphnia, Ceriodaphnia, Diaptomus and cyclopoids was studied Cor a 48 hours period in Arenal Reservoir, Costa Rica. In general the zooplankton decreased during day t across the water column. Daphnia, Diaptomus and the cyclopoids had a constant depth distribution with time, whereas Bosmina, and Cerodhnia showed slight evidénce oC vertical migration. Due to the scarcity of planktivorous fishes in the limnetic zone oC the reservoir, the migration of small-sized cladocerans is puroudtely explained by invertebrate predation pressure (e.g. cyclopoids)