Dernieres nouvelles du SCDB
- Statement by David Cooper, Acting Executive Secretary of the Convention on Biological Diversity, on the occasion of the International Day of the World's Indigenous Peoples 9 August 2023
- Statement by David Cooper, Acting Executive Secretary of the Secretariat of the Convention on Biological Diversity at the G20 Environment and Climate Sustainability Ministerial Meeting
- Statement by the Acting Executive Secretary of the Convention on Biological Diversity at the first meeting of the Informal Advisory Group on Technical and Scientific Cooperation, Montreal, 14 June 2023
Contribution à l’étude de la biodiversité et de l’écologie des Araignées du sol dans un champ cultivé de Manihot esculenta Crantz (Euphorbiaceae) à Kisangani, RD Congo
| Download |
Contribution à l’étude de la biodiversité et de l’écologie des Araignées du sol dans un champ cultivé de Manihot esculenta Crantz (Euphorbiaceae) à Kisangani, RD Congo (2).pdf
(French,
249 KB)
|
|---|---|
| View | Open in browser |
| Upload date | 15 Jan 2017 |
| Contributor | Justin Asimonyio |
| Geographical coverage | Kisangani, République démocratique du Congo |
| Keywords | Araignées, Biodiversité, Lutte biologique, Agro-écosystème, Kisangani, République Démocratique du Congo. |
| Release date | 15/01/2017 |
| # | Language | File name | Contributor | Upload date | Size | Content type |
|---|---|---|---|---|---|---|
| 1 | French | Contribution à l’étude de la biodiversité et de l’écologie des Araignées du sol dans un champ cultivé de Manihot esculenta Crantz (Euphorbiaceae) à Kisangani, RD Congo (2).pdf (current) | Justin Asimonyio | 15 Jan 2017 | 249 KB |
application/pdf
|
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.