[ ECOLOGIE DU MOLLUSQUE Pila ovata DANS LES ECOSYSTEMES AQUATIQUES DE LA REGION DE KATANA, SUD KIVU, EST DE LA R.D. CONGO ]
Volume 15, Issue 2, June 2015, Pages 313–326
Bertin NDEGEYI KABALE1, Jean Louis BAHIZIRE KAYEYE2, Pierre Batumike Cishibanji3, Jean Jacques Bagalwa Mashimango4, and Jean Pierre Baluku Bajope5
1 Département de Biologie, Centre de Recherche en Sciences Naturelles, RD Congo
2 Département de Biologie, Centre de Recherche en Sciences Naturelles, RD Congo
3 Département de Biologie, Centre de Recherche en Sciences Naturelles, RD Congo
4 Département de Biologie, Centre de Recherche en Sciences Naturelles, RD Congo
5 Département de Biologie, Centre de Recherche en Sciences Naturelles, 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.
An ecological study of the aquatic mollusk Pila ovata has been realized in the aquatic ecosystems of Katana region, south Kivu, East of the Democratic Republic of Congo, which shelters this species. Ten aquatic- ecosystems have been prospected in this region according to the current speed of water, the bottom's nature, the pH, the temperature, the depth, the aquatic vegetation, the altitude and the shade degree. Here, it's about the study of favorable ecological conditions to this species in the aquatic ecosystems of the Katana region. For ending at reliable results, the sampling of mollusks has been practiced using the standardized unity of time method. The harvesting of mollusks has been done generally with the help of cloudy water trickle with small stitch of 2 mm attached on an iron bar having a circular opening of 50cm of diameter fits with a lumber handle of 1.5m. The harvesting of mollusks has been done by manual picking, and then put back in their nature biotope after counting. The favorable ecological conditions which prevail to the proliferation and to the survival of the mollusk Pila ovata are respectively: a minimum lightning (minimum plant cover), an abundant died aquatic vegetation, a minimum current, a sandy bottom or muddy on the one hand and a moderate temperature (≥ 160C) on the other hand. A highly significant difference has been observed between aquatic ecosystems of the region all the more that the mollusks number differs between sites. The knowledge of the ecology of this mollusk is an asset for the study of the fight against the intermediate host mollusks of Schistosomiasis.
Author Keywords: Mollusk, Gastropods, Pilidae, Pila ovata, Ecology, DR Congo.
Volume 15, Issue 2, June 2015, Pages 313–326
Bertin NDEGEYI KABALE1, Jean Louis BAHIZIRE KAYEYE2, Pierre Batumike Cishibanji3, Jean Jacques Bagalwa Mashimango4, and Jean Pierre Baluku Bajope5
1 Département de Biologie, Centre de Recherche en Sciences Naturelles, RD Congo
2 Département de Biologie, Centre de Recherche en Sciences Naturelles, RD Congo
3 Département de Biologie, Centre de Recherche en Sciences Naturelles, RD Congo
4 Département de Biologie, Centre de Recherche en Sciences Naturelles, RD Congo
5 Département de Biologie, Centre de Recherche en Sciences Naturelles, 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
An ecological study of the aquatic mollusk Pila ovata has been realized in the aquatic ecosystems of Katana region, south Kivu, East of the Democratic Republic of Congo, which shelters this species. Ten aquatic- ecosystems have been prospected in this region according to the current speed of water, the bottom's nature, the pH, the temperature, the depth, the aquatic vegetation, the altitude and the shade degree. Here, it's about the study of favorable ecological conditions to this species in the aquatic ecosystems of the Katana region. For ending at reliable results, the sampling of mollusks has been practiced using the standardized unity of time method. The harvesting of mollusks has been done generally with the help of cloudy water trickle with small stitch of 2 mm attached on an iron bar having a circular opening of 50cm of diameter fits with a lumber handle of 1.5m. The harvesting of mollusks has been done by manual picking, and then put back in their nature biotope after counting. The favorable ecological conditions which prevail to the proliferation and to the survival of the mollusk Pila ovata are respectively: a minimum lightning (minimum plant cover), an abundant died aquatic vegetation, a minimum current, a sandy bottom or muddy on the one hand and a moderate temperature (≥ 160C) on the other hand. A highly significant difference has been observed between aquatic ecosystems of the region all the more that the mollusks number differs between sites. The knowledge of the ecology of this mollusk is an asset for the study of the fight against the intermediate host mollusks of Schistosomiasis.
Author Keywords: Mollusk, Gastropods, Pilidae, Pila ovata, Ecology, DR Congo.
Abstract: (french)
Une étude écologique du mollusque dulcicole Pila ovata a été réalisée dans les écosystèmes aquatiques de la Région de Katana, au Sud Kivu, Est de la République Démocratique du Congo, qui abritent cette espèce. Dix écosystèmes aquatiques ont été prospectés dans cette région d'après la vitesse du courant, la nature de fond, le pH, la température, la profondeur, la végétation aquatique, l'altitude et enfin le degré d'ombrage. Il s'agit ici d'étudier les conditions écologiques favorables à cette espèce dans les écosystèmes aquatiques de la région. Pour aboutir aux résultats fiables, l'échantillonnage de mollusques a été pratiqué suivant la méthode d'unité de temps standardisée. La récolte des mollusques se faisait généralement à l'aide d'un filet troubleau à petite maille de 2mm accroché sur une barre de fer ayant une ouverture circulaire de 50cm de diamètre muni d'une manche de bois de 1,5m. La récolte des mollusques se faisait par ramassage manuel, ensuite remis dans leur biotope naturel après comptage. Les conditions favorables qui prévalent à la prolifération et à la survie du mollusque Pila ovata sont respectivement : un éclairement minimal (couverture végétale minimale), une végétation aquatique abondante (morte), un courant minimal, un fond sablonneux ou vaseux d'une part et une température modérée (≥16°C) d'autre part. Une différence hautement significative a été observée dans les récoltes entre les écosystèmes aquatiques prospectés de la région d'autant plus que le nombre des mollusques diffère entre les sites. La connaissance de l'écologie de ce mollusque est un atout pour les études de lutte contre les mollusques hôtes intermédiaires de la Schistosomiase.
Author Keywords: Mollusque, Gastéropodes, Pilidae, Pila ovata, Ecologie, RD congo.
How to Cite this Article
Bertin NDEGEYI KABALE, Jean Louis BAHIZIRE KAYEYE, Pierre Batumike Cishibanji, Jean Jacques Bagalwa Mashimango, and Jean Pierre Baluku Bajope, “ECOLOGY OF THE MOLLUSC Pila ovata IN THE AQUATIC ECOSYSTEMS OF KATANA REGION, SOUTH KIVU, EAST OF THE D.R. CONGO,” International Journal of Innovation and Scientific Research, vol. 15, no. 2, pp. 313–326, June 2015.
