Relationship between the abundance and distribution of the endemic fish Paretroplus dambabe in the north-western wetland of Madagascar and the effect of environmental parameters and the presence of other fish species

Ramanantsalama RV, Andriamasimanana RH, Andrianarimisa A, Oliarinony R
2018 Biodiversity International Journal  
Relationship between the abundance and distribution of the endemic fish Paretroplus dambabe in the north-western wetland of Madagascar and the effect of environmental parameters and the presence of other fish species Submit Manuscript | Abstract Paretroplus dambabe is a local endemic fish species only found in Kinkony Lake (in north-western wetland and protected area) and two surrounding small lakes, Andranobe and La Digue. The ecology of P. dambabe is threatened by the human activities that
more » ... se the erosion and decrease of reed vegetation surface. Also, the lake is undergoing ricegrowing in the shore. In addition, the invasive fish species could affect the distribution of P. dambabe. This study aims to determine the influence of the physic-chemical parameters, reed vegetation and the other fish species on the abundance of P. dambabe. Three categories of variables were taken into account: (a) the physic-chemical parameters, (b) the distance from the reed vegetation, and (c) the number of fish species and the relative abundance per sampling station of each fish species. Environmental variables and the presence of the Tilapiinae cichlids do not yet affect the presence of P. dambabe in the Kinkony Lake. But, the abundance of this endemic fishis negatively and significantly influenced by the abundance of the common carp Cyprinus carpio, Ambassis sp., sleepy goby Glossogobius biocelatus, tank goby G. giuris, longfin tilapia Oreochromis macrochir, Nile tilapia O. niloticus, Mozambic tilapia O. mossambicus, redbreast tilapia Tilapia rendalli and redbelly tilapia T. zillii. Species within the genera Oreochromis and Tilapia, and C. carpio could eat the eggs of P. dambabe when they consume the aquatic plant in the lake. Species within the genus Glossogobius are carnivorous species and could eat the juvenile of P. dambabe. As P. dambabe, A. sp. is an omnivorous species and could be in competition with P. dambabe. Thus, the manager of this north-western protected area (Mahavavy-Kinkony Complex) should continue the ecological monitoring of the lake to observe the evolution of the physic-chemical parameters, the surface of the reed vegetation and the abundance of native and invasive species. Climate change can disturb the environmental parameters of Kinkony Lake and could affects native fish species compared to the invasive species. Citation : Ramanantsalama RV, Andriamasimanana RH, Andrianarimisa A, et al. Relationship between the abundance and distribution of the endemic fish Paretroplus dambabe in the north-western wetland of Madagascar and the effect of environmental parameters and the presence of other fish species. Biodiversity Int J. 2018;2(2):139-145. Relationship between the abundance and distribution of the endemic fish Paretroplus dambabe in the north-western wetland of Madagascar and the effect of environmental parameters and the presence of other fish species 140 Copyright: ©2018 Ramanantsalama et al. other fish species and the distance from the reed vegetation affect the presence and the relative abundance of P. dambabe.
doi:10.15406/bij.2018.02.00056 fatcat:fabbifrcirdzrj3jkudw4jntdm