SciELO - Scientific Electronic Library Online

 
vol.73 issue1Rhythms of locomotor activity and burrow use under seminatural conditions in Ctenomys talarum (Rodentia, Octodontidae)Effect of the ultraviolet-B radiation on growth and photosynthesis of seven varieties of wheat (Triticum aestivum L.) author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

Share


Revista chilena de historia natural

Print version ISSN 0716-078X

Abstract

MARTINEZ, GINGER. Feeding behaviour of Daphnia ambigua Scourfield 1947, Moina micrura Kurz 1874 and Ceriodaphnia dubia Richard 1895 (Cladocera) under a food concentration gradient. Rev. chil. hist. nat. [online]. 2000, vol.73, n.1, pp.47-54. ISSN 0716-078X.  http://dx.doi.org/10.4067/S0716-078X2000000100006.

Because Cladocera is the most abundant group of filter-feeders in the freshwater zooplankton and their populations are usually found under limited resources conditions, the individual response under a resources concentration gradient has important consequences on the population and community patterns. Feeding behavior of Moina micrura, Ceriodaphnia dubia and Daphnia ambigua (Cladocera) on the microalgae Chlorella sp. and Oocystis sp. (Chlorophyceae) was compared by using the following parameters: Maximum Ingestion Rate (Imax), Incipient Limiting Concentration (ILC) and Consumption Efficiency (b), which were obtained through a model of functional response. Results indicated that D. ambigua showed the highest Imax and ILC on both resources, however, this specie presented the lowest b. Whereas, D. ambigua did not show differences in b on Chlorella sp. or Oocystis sp., M. micrura showed a higher b on Chlorella sp. and C. dubia on Oocystis sp. These results reveal significant interspecific differences in the feeding response of Cladocera, which showed a complex behavior exposed to variations in the availability of food resources

Keywords : feeding behavior; ILC; consumption efficiency; filter-feeders; Cladocera.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License