%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture non répertoriées par l'AERES
%A Lazzaro, Xavier
%T Feeding convergence in South American and African zooplanktivorous cichlids Geophagus brasiliensis and Tilapia rendalli
%D 1991
%L fdi:40415
%G ENG
%J Environmental Biology of Fishes
%@ 0378-1909
%K POISSON D'EAU DOUCE ; ETHOLOGIE ; NUTRITION ANIMALE ; RELATION PREDATEUR PROIE ; ETUDE COMPARATIVE
%K PLANCTOPHAGE ; FILTREUR ; CHASSEUR VISUEL
%K BRESIL ; CONGO
%P 283-293
%R 10.1007/BF00000693
%U 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
%V 31
%W Horizon (IRD)
%X 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