Horizon 1 1 17 ACLN : Articles dans des revues avec comité de lecture non répertoriées par l'AERES Environmental Biology of Fishes 283-293 POISSON D'EAU DOUCE ETHOLOGIE NUTRITION ANIMALE RELATION PREDATEUR PROIE ETUDE COMPARATIVE PLANCTOPHAGE FILTREUR CHASSEUR VISUEL BRESIL CONGO 1991 fdi:40415 ENG Environmental Biology of Fishes 0378-1909 10.1007/BF00000693 https://www.documentation.ird.fr/hor/fdi:40415 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/pleins_textes_6/b_fdi_35-36/40415.pdf 31 Horizon (IRD) Acara, #Geophagus brasiliensis$, and red-breasted bream, #Tilapia rendalli$, are important planktivorous cichlids in Southern Brazilian lakes and reservoirs. In laboratory experiments, I quantified behavior and selectivity of different sizes of these two fish feeding on lake zooplankton. Feeding behavior depended on fish size. Fish <30 mm were visual feeders. Fish 30-50 mm either visually feed or pump-filter fed depending on zooplankton size. Fish >70 mm were pump-filter feeders. Replicate 1 h feeding trials revealed that, as the relative proportions of prey changed during an experiment, acara (30-42 mm, standard lenght) and tilapia (29-42 mm) shifted from visual feeding on large evasive copepods to filter feeding on small cladocerans and rotifers. Electivity and feeding rate increased with prey lenght, but were distinct for similar-sized cladocerans and copepods. Visual/filter-feeding fish had lowest electivities for small and poorly evasive rotifers and cyclopoid nauplii. (D'après résumé d'auteur) 080ZOOGEN04 ; 036EAUCON02