%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES
%A Mérigoux, S.
%A Ponton, Dominique
%T Body shape, diet and ontogenetic diet shifts in young fish of the Sinnamary river, French Guiana, South America
%D 1998
%L fdi:010014705
%G ENG
%J Journal of Fish Biology
%@ 0022-1112
%K POISSON D'EAU DOUCE ; ANATOMIE ANIMALE ; COMPORTEMENT ALIMENTAIRE ; CORRELATION
%K GUYANE FRANCAISE
%K SINNAMARY COURS D'EAU
%M ISI:000072711500009
%P 556-569
%U https://www.documentation.ird.fr/hor/fdi:010014705
%> https://horizon.documentation.ird.fr/exl-doc/pleins_textes/pleins_textes_7/b_fdi_51-52/010014705.pdf
%V 52
%W Horizon (IRD)
%X A total of 1468 young fish representing 66 taxa from the Sinnamary river, French Guiana was classified by complete cluster analysis of mean relative body width and mean relative body height into four groups. These had anguilliform, disciform, flat or intermediate body shapes and belonged chiefly to Gymnotiformes, Perciformes, Siluriformes and Characiformes, respectively. Several of the taxa shifted from one to another body shape during ontogenesis. Seven diet groups were defined by complete cluster analysis. Among these, six groups were represented by carnivorous fish. The three most frequent groups had diets of mainly insect larvae and small crustaceans, insect larvae, and predominantly terrestrial insects. The majority of the fish taxa showed ontogenetic diet shifts. Carnivorous fish usually switched from small-size prey, such as insects and/or fish. However, taxa differed in their capacities to switch from small prey to intermediate and/or to large prey. Taxa of different body shapes had significantly different diets. Disciform fish fed mainly on aquatic insect larvae and terrestrial insects but also, in small amounts, on small crustaceans. Most anguiliform taxa ate insect larvae. Individuals belonging to the depressiform or intermediate morphotype had varied diets ranging from plant debris and substratum to fish. (Résumé d'auteur)
%$ 034BIOVER01