BIONOMICS OF CULEX SPECIES OF BONNY ISLAND

Studies have shown the distribution of Culex mosquitoes in places where they were previously absent, implicating anthropogenic impact, especially rapid urbanization. Literature on the distribution and habitat preference of the mosquito species in Bonny Island is sparse. This study was hence conducted to fill the knowledge gap. Larval collection was conducted in three habitats (drainages, pools of water, and discarded containers) across four locations in the Island, namely, Akiama, Abalamabie, Workers’ Camp and Finima, from July – December, 2023, using standard 350 mL adjustable dippers and syringes. Larval identification was done using appropriate keys; data collected were recorded and habitat preference indices were computed. Relevant statistical analysis was done to test for significant differences in the number of larvae isolated from the habitat types investigated. Results showed that all the habitats were significantly different with drainages holding a larger number of larvae (1,778; 42.72%), followed by pools of water (1,477; 35.49%) and discarded containers (907; 21.79%). Habitat preference index showed no preference for any location with values ranging approximately from 0.24 – 0.26. Thus, Culex larvae were found to be ecological generalists in the locations of Bonny Island hereby examined, thereby requiring even spread of vector control measures.