Variation du nombre de filaments et leur importance dans l’hétérogénéité du système branchial de Barbus camptacanthus Bleeker, 1863

Variation du nombre de filaments et leur importance dans l’hétérogénéité du système branchial de Barbus camptacanthus Bleeker, 1863

Variation in gill filaments number and their importance in the heterogeneity of Barbus camptacanthus Bleeker, 1863 gill system


1Université de Yaoundé I, Faculté des Sciences, Laboratoire de Parasitologie et Ecologie. BP 812 Yaoundé, Cameroun.

(*Corresponding author: Tel: +237 675 85 43 20; e-mail:

Received November, 2015; revised February, 2016; accepted March, 2016.



Les branchies de Barbus camptacanthus Bleeker, 1863 hébergent diverses espèces d’ectoparasites dont les monogènes. Dans le présent travail, nous étudions la structure du biotope de ces parasites en tenant compte du nombre de filaments branchiaux, supports sur lesquels se fixent ces organismes. Pour mener cette étude, 56 poissons ont été pêchés en septembre 2014 dans la rivière Koukoum à Beng-Nyong et conservés dans une solution de formol à 10%. Le dénombrement des filaments branchiaux s’est réalisé à la loupe binoculaire. L’évolution du nombre de filaments branchiaux a été positivement corrélée à la taille de B. camptacanthus. De plus, le nombre total moyen de filaments branchiaux par côté, arc et hémibranchie a augmenté avec la taille du poisson. Ce paramètre n’a pas statistiquement varié en fonction du côté du poisson mais a significativement diminué dans le sens antéro-postérieur suivant le gradient transversal. En outre quel que soit l’arc considéré, l’hémibranchie antérieure a statistiquement porté plus de filaments que son homologue postérieur.

Mots clés: Barbus camptacanthus, ectoparasites, filaments branchiaux, biotope, structure.


The gills of Barbus camptacanthus Bleeker, 1863 harbor many parasite species as monogeneans. In the present work, we study the structure of the biotope of these parasites based on the number of gill filaments on which they are attached. ¶To undertake this investigation, 56 fishes were caught in September 2014 in the Koukoum River at the locality of Beng-Nyong and fixed in 10% formalin solution. The gill filaments were counted using a stereomicroscope. The evolution of gill filaments number was positively correlated to the B. camptacanthus length. Moreover, the average total number of the gill filaments at the side; the arch and hemibranch increased with the host’s size. This parameter did not statistically vary with the host side but decreased significantly from the anterior towards the posterior arch. Irrespective of the arch, the anterior hemibranch statistically carried more filaments than the posterior one.

Key words: Barbus camptacanthus, ectoparasites, gill filaments, biotope, structure.


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