Volume 14, Issue 1, March 2015, Pages 39–48
Joseph KIZA NAMEGABE1
1 Département d'environnement, Centre de Recherche en Sciences Naturelles (CRSN-Lwiro), D.S. Bukavu, RD Congo
Original language: French
Copyright © 2015 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
The present work was to study the diet of Lamprichthys tanganicanus, a new species observed in Lake Kivu. Fish were caught from 12 to 13 August 2007 and 23 January to 22 March 2012 in the coastal of Bukavu basin during a 24-hour cycle using gillnets and beach seine. Stomach contents were analyzed and identified. The index of occurrence, abundance, volumetric and food were calculated. The results obtained indicate that L. tanganicanus feeds to 99.4% of zooplankton (Copepods, 86.54%, Cladocera-11.43% and Rotifera-2.03%), to 0.25% of phytoplankton (Diatoms), to 0.13% of insects and to 0.22% of prey unidentified. Zooplankton constitutes the major prey (IA=53.59%) although its degree of importance varies according to gender of L. tanganicanus (male: IA=48.81% and female: IA=57.72%). Other preys are of secondary importance (IA˂ 10). This fish is zooplanktivorous giving it a diet similar to that of Limnothrissa miodon.
Author Keywords: Diet, Lamprichthys tanganicanus, Bukavu Bassin, Lake Kivu.
Joseph KIZA NAMEGABE1
1 Département d'environnement, Centre de Recherche en Sciences Naturelles (CRSN-Lwiro), D.S. Bukavu, RD Congo
Original language: French
Copyright © 2015 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
The present work was to study the diet of Lamprichthys tanganicanus, a new species observed in Lake Kivu. Fish were caught from 12 to 13 August 2007 and 23 January to 22 March 2012 in the coastal of Bukavu basin during a 24-hour cycle using gillnets and beach seine. Stomach contents were analyzed and identified. The index of occurrence, abundance, volumetric and food were calculated. The results obtained indicate that L. tanganicanus feeds to 99.4% of zooplankton (Copepods, 86.54%, Cladocera-11.43% and Rotifera-2.03%), to 0.25% of phytoplankton (Diatoms), to 0.13% of insects and to 0.22% of prey unidentified. Zooplankton constitutes the major prey (IA=53.59%) although its degree of importance varies according to gender of L. tanganicanus (male: IA=48.81% and female: IA=57.72%). Other preys are of secondary importance (IA˂ 10). This fish is zooplanktivorous giving it a diet similar to that of Limnothrissa miodon.
Author Keywords: Diet, Lamprichthys tanganicanus, Bukavu Bassin, Lake Kivu.
Abstract: (french)
Le présent travail avait pour but d'étudier le régime alimentaire de Lamprichthys tanganicanus, une nouvelle espèce observée dans le lac Kivu. Les poissons ont été capturés du 12 au 13 Août 2007 et du 23 Janvier au 22 Mars 2012 dans la zone côtière du bassin de Bukavu au cours d'un cycle de 24 heures en utilisant le filet maillant et la seine de plage. Les contenus stomacaux ont été analysés et identifiés. Les indices d'occurrence, d'abondance, volumétrique et alimentaire étaient calculés. Les résultats obtenus indiquent que L. tanganicanus se nourrit à 99.4% des zooplanctons (Copépodes-86.54%, Cladocères-11.43% et Rotifères-2.03%), à 0.25% des phytoplanctons (Diatomées), à 0.13% d'insectes et à 0.22% des proies non identifiées. Le zooplancton constitue la proie importante (IA=53.59%) même si son degré d'importance varie en fonction des sexes du L. tanganicanus (mâle: IA=48.81% et femelle: IA=57.72%). Les autres proies représentent une importance secondaire (IA˂10). Ce poisson est donc zooplanctonophage ce qui lui confère un régime alimentaire semblable à celui de Limnothrissa miodon.
Author Keywords: Régime alimentaire, Lamprichthys tanganicanus, Bassin de Bukavu, Lac Kivu.
How to Cite this Article
Joseph KIZA NAMEGABE, “Etude du régime alimentaire du Lamprichthys tanganicanus (Boulenger, 1898) du Lac Kivu, RD Congo,” International Journal of Innovation and Scientific Research, vol. 14, no. 1, pp. 39–48, March 2015.
