Association between Labeobarbus spp. (Teleostei: Cyprinidae) and environmental variables in the Luhoho basin (Eastern Congo River basin; DRC).

Autor: Kisekelwa T; Unité d'Enseignement et de Recherche en Hydrobiologie Appliquée, Département de Biologie-Chimie, ISP/Bukavu, Bukavu, Democratic Republic of the Congo.; Section Vertebrates, Ichthyology, Royal Museum for Central Africa, Tervuren, Belgium.; Laboratory of Biodiversity and Evolutionary Genomics, KU Leuven, Leuven, Belgium., Snoeks J; Section Vertebrates, Ichthyology, Royal Museum for Central Africa, Tervuren, Belgium.; Laboratory of Biodiversity and Evolutionary Genomics, KU Leuven, Leuven, Belgium., Zamba AI; Ecole Nationale Supérieure d'Agronomie et de Foresterie, Université Marien Ngouabi, Brazzaville, Democratic Republic of the Congo., Amzati GS; Faculty of Agricultural and Environmental Sciences, Université Evangélique en Afrique, Research Unit of Veterinary Epidemiology and Biostatistics, Bukavu, Democratic Republic of the Congo., Isumbisho M; Unité d'Enseignement et de Recherche en Hydrobiologie Appliquée, Département de Biologie-Chimie, ISP/Bukavu, Bukavu, Democratic Republic of the Congo., Masilya PM; Unité d'Enseignement et de Recherche en Hydrobiologie Appliquée, Département de Biologie-Chimie, ISP/Bukavu, Bukavu, Democratic Republic of the Congo.; Département de Biologie, Centre de Recherche en Hydrobiologie (CRH) d'Uvira, Uvira, Democratic Republic of the Congo., Lemmens P; Laboratory of Aquatic Ecology, Evolution & Conservation, KU Leuven, Leuven, Belgium., Vreven E; Section Vertebrates, Ichthyology, Royal Museum for Central Africa, Tervuren, Belgium.; Laboratory of Biodiversity and Evolutionary Genomics, KU Leuven, Leuven, Belgium.
Jazyk: angličtina
Zdroj: Journal of fish biology [J Fish Biol] 2021 Aug; Vol. 99 (2), pp. 321-334. Date of Electronic Publication: 2021 Mar 28.
DOI: 10.1111/jfb.14719
Abstrakt: 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.
(© 2021 Fisheries Society of the British Isles.)
Databáze: MEDLINE
Externí odkaz: