Demographic densification and agricultural activities have led to strong anthropization of the watersheds of the Daloa’s urban aquatic environments, which could modify their physico-chemical characteristics. The present study was carried out to highlight the influence of physico-chemical parameters on the distribution of molluscs in Daloa’s rice and fish ponds. It took place between July and September 2020, in eight (08) sampling sites located in rice and fish ponds. The aquatic mollusks sampling was carried out using a turbid net (1 m2 of sampled area) and a Van Veen bucket (0.15 m2 of sediment per sample). The result showed that Dissolved oxygen, conductivity, pH, transparency, temperature and depth did not vary significantly between sampling sites in the rice and fish ponds. The inventory revealed 26 species of mollusks in 10 families and 5 orders. The order Basommatophores (13 species) was the most diversified. The rice ponds with 25 species was more diversified than the fish ponds with 17 species. The presence of Aplexa marmorata and Melanoides tuberculata in all the Daloa’s rice and fish farming systems was due to the basicity of these waters.

The present study aims to evaluate the diversity of ichthyological populations in the section of the Bandama River located in the Upper Bandama Fauna and Flora Reserve (RFF-HB). This study was carried out, following the longitudinal gradient (upstream-downstream) of the section of the Bandama River in the reserve, on 06 stations and during 08 sampling campaigns between January 2018 and February 2019. The collection of fish from the experimental fishery was carried out using gill nets, creels and hawks. The ichthyofauna inventory identified 33 fish species divided into 17 families and 8 orders. The fish populations are more diversified in the middle course (25 species) and upstream (24 species) of the reserve. The frequencies of occurrence of the ichthyofauna show that Labeo coubie, Brycinus imberi, Chrysichthys nigrodigitatus, Heterobranchus isopterus and Oreochromis niloticus are very frequently encountered on the Bandama river in the reserve. The analysis of the diversity of the ichthyological populations of the reserve shows that the fish populations are less diversified but more stable and balanced.

This study investigated anaerobic co-digestion of cassava liquid waste (very acid and poor in nitrogen) and human urine. Three experimental digesters were used: manioc effluent; manioc effluent + urine; manioc effluent + urine + cow dung.
All digesters have functioned with mesophilic temperatures between 24.0 and 35.6