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Kadjo Blaise

  • Biodiversity Journal, 16 (3): 455-470

    Brou Guy-Mathieu Assovi & Blaise Kadjo
    Home range and habitat use of the black-bellied pangolin, Phataginus tetradactyla (Linnaeus, 1776) (Mammalia Manidae) in the Voluntary Nature Reserve of the Tanoe-Ehy Swamp Forest (Côte d’Ivoire)
    https://doi.org/10.31396/Biodiv.Jour.2025.16.3.455.470

    ABSTRACT
    The black-bellied pangolin, Phataginus tetradactyla (Linnaeus, 1776) (Mammalia Manidae) is among the less studied pangolins species occurring in West Africa. That situation renders any conservation action related to this species relatively impossible. This study aims to estimate home range size and habitat use of P. tetradactyla in the Voluntary Nature Reserve of the Tanoe-Ehy Swamp Forest. We used the recce method to detect and capture pangolin specimens. We radio-tagged pangolins using VHF transmitter. We characterized pangolins habitats in order to identify available and used habitats by pangolins in their home ranges. We recorded 148 location points to successfully estimate home range for five specimens, including males, females, juveniles and adults. Recorded points ranged from 19 to 47. Means estimated KDE (Kernel Density Estimation) 95 % was 123.7±487.1 ha (Min=30.74 ha; Max = 260.41 ha) and KDE 50 % was 30.01±21.01 ha (Max=62.63 ha; Min=7.86 ha). For MCP (Minimum Convex Polygon) 95 % and 50 %, means estimated values were respectively 29.76±20.42 ha (Max=53.41 ha; Min=9.78 ha) and 10.66±9.79 ha (Max=23.82 ha; Min=1.92 ha). Pangolins home range covered three habitat types: Gallery Forest, Seasonal Flooded Forest and Marsh Forest. The most available and used habitats were GF and SFF. Also, the most selected habitats were GF and SFF. Regarding to their home range sizes and threats identified in their habitats, necessary actions need to be considered to solve pangolin conservation problem in the reserve.

  • Biodiversity Journal, 11 (4): 0879-0887

    Atta Assemien Cyrille-Joseph, Kadjo Blaise, Soulemane Ouattara & Kouadio Yao Roger
    Structure of buffaloes Syncerus caffer (Sparrman, 1779) (Mammalia Bovidae) of the Comoe National Park (North-East Ivory Coast)
    https://doi.org/10.31396/Biodiv.Jour.2020.11.4.879.887

    ABSTRACT
    This study was conducted from January to August 2018 in Comoe National Park (CNP), Ivory Coast. This park is home to a great biological diversity in general and an important fauna of large mammals in particular. It is one of the priority areas of the West African protected areas network. Today, many wildlife species are threatened by intensive poaching. Despite the importance of this scourge, the information available on buffaloes in CNP is still very patchy. In order to determine some parameters of the conservation status of buffalo populations, this study was conducted in the central zone and southern zone of CNP. The camera-trap method (12 camera-traps) made it possible to determine the different age classes and sex ratios of the buffalo populations. Family units were observed 11 times on all two (2) sites corresponding to 34.38 % of the events (32). The average size of family units is 23.18 individuals (standard deviation = 25.52; N = 11) with maximum of 77 individuals. Eleven (11) different groups (herds) of 255 individuals were identified with an average size of 32 individuals per herd. In the center, four groups composed of 15 adults, 31 subadults, 37 juveniles and seven calves were identified. In the south, seven groups with 34 adults, 49 subadults, 79 juveniles and three calves were observed. Calves were more numerous in the herds observed in the center than those identified toward the periphery at the 5 % (P-value = 0.0254). This high presence of calves in the herds observed in the center would reflect the fact that the buffaloes retire to the central part of the park for calving. Based on the high proportion of individuals in the young age classes (juveniles 44.5 % and subadults 32.07 %) and the sex ratio 1.65 (one male for 1.65 females), the buffaloes population in the CNP was considered viable. However, the inbreeding rate and anthropogenic pressures have yet to be evaluated to complete these data.