The study is a contribution to the knowledge of Rodents and Shrews diversity in Yasikia forest, located at 31 Km from Kisangani, on the road towards Opala. On transects, Rodents and Shrews were sampled using the protocol with [xPF, ySH]. A total of 13 sampling lines were observed during 15 days (from March 26 to 11 April 2015). As results, we collected 74 shrews, belonging to two genera at least 9 species; 68 rodents which represent 9 genera and 12 species. In total, we collected 145 small mammals, with a trapping effort of 6478 trap-nights. The specific biodiversity and trappingsuccess showed that Pitfall traps are the most efficient to capture Shrews. It also catches small Rodents and adult such as N.cf.grata, and other adults’ rodents as Praomys genera, but with reduced number. Sherman traps are more effective to catch Rodents. They also catch shrews in reduced number. The trappings were conducted in three habitats. In the primary forest G. dewevrei (EC = 1060 night-traps, 50 specimens, 14 species, and TS = 4.72%), mixed primary forest (EC = 1500 night-traps, 69 specimens, 15 species, and TS = 4.6%) and fallow land (EC = 440 night-traps, 23 specimens, 9 species, and TS = 5.23%). No new species was announced but rather the presence of three endemic species of which two (C. Goliath and L. huttereri) are rare.
The present study was undertaken with the aim to evaluate the diversity, the size and the vertical, horizontal and monthly distributions of the soil spiders in a field of cassava. Two methods were used, the" distance sampling" and the “Barber” trap. The identification of spiders was carried out using a binocular magnifying glass and identification key books of the Africa spiders. Each spiders sample was measured at the cephalothorax region with the help of graduated micrometer. The obtained results were analyzed by the mean of khi-square statistic test. 306 specimens of spiders belonging to 7 families, 10 genus and 12 species were harvested and identified. By the mean of "distance sampling" technique, 135 specimens belonging to 2 families and 7 species were captured. Lycosidae family was the most abundant (227 specimens) and the more diversified (4 species out of 7 harvested), following by the Ctenidae family (3 species out of 8 specimens). By the mean of “Barber” trap, 171 specimens belonging to 6 families were captured among which Lycosidae family was also the most abundant with 167 specimens and the more diversified (4 species out of 9 harvested) that the other (Salticidae, Gnaphosidae and Lycosidae). The ecological approach revealed that the spiders in this biotope circulate at the soil level (±0.96 cm) and that they have small sizes (2.07 mm to the level of the cephalothorax). Weeding and/or the ploughing could simplify the agro-systems and thus would involve their colonization by spiders of small sizes essential for the regulation of the population of the devastating insects of the cassava.
The study concerns the reproduction and structure of the populations of Sciuridae from the forest reserve of Yoko and has for objectives to identify the dominant species present in this reserve, to determine and to analyze the structure of the populations of squirrels and their reproduction phonology in order to estimate the stability of this group facing the local and global changes. The animals were harvested with the help of traditional traps from May 2014 to April 2015. From the six species captured, Funisciurus anerythrus was the most abundant, followed by the Funisciuruses bayonii, Funisciurus congicus, Paraxerus boehmi, Heliosciurus rufobrachium and Protoxerus stangeri. Their activities seem to achieve themselves in the fallows except the last two species that prefer the primary forest. The reproductive activities increase toward the middle of the rainy season (September-November) with a great proportion of the gravid females from December to February, which accompanies of a massive entry of the young during the active period from June to November. The sex-ratio is in favor of the males but the difference is not significative (p>0.05). The middle range is of two for Funisciurus anerythrus, and one for the other. The adults are abundant; the continuous presence of the young adult and juvenile reveals a continuous reproduction and the stability of the population.