Répertoire du personnel
Emmanuel Vreven
Biologie
Vertébrés
Vertébrés
Détails
Kisekelwa, T., Snoeks, J., Ibala Zamba, A., Sefu Amazati, G., Isumbisho, M., Mulungula Masilya, P., Lemmens, P. & Vreven, E. 2021. ‘Association between Labeobarbus spp. (Teleostei: Cyprinidae)and environmental variables in the Luhoho basin (Eastern Congo River basin; DRC)’. Journal of Fish Biology 99 (2): 321-334. wileyonlinelibrary.com. DOI: 10.1111/jfb.14719. (PR).
Article dans une revue scientifique / Article dans un périodique
The African cyprinid genus Labeobarbus is characterized by a high polymorphism in
mouth morphology. The association between four species of this genus (two
chiselmouths, one rubberlip with a well-developed fleshy mental lobe on the lower
jaw, i.e., a fleshy appendage on the chin, and one usually with a poorly developed
one) and 26 environmental variables was investigated in four affluents of the Luhoho
River in the Albertine Highlands of the Upper Congo basin. A combination of univariate
and multivariate analyses suggested that differences exist in habitat composition
at localities where different Labeobarbus species were reported, and within different
mouth phenotypes. The association of L. longidorsalis with the presence of cobbles
and pebbles and of L. brauni with the presence of boulders suggests that the occurrence
of chiselmouths phenotype is associated with stony habitats, whereas phenotypes
with a mental lobe, i.e., Labeobarbus longifilis and L. paucisquamatus, mostly
occupy habitats without stones. Differences in the distribution between these two
species appear to be linked to physico-chemical parameters such as electrical conductivity
and water temperature rather than substrate type. The findings of this study
are relevant for developing guidelines that aim effective local preservation and conservation
of these Labeobarbus species.