DOI: https://doi.org/10.36347/sajb.2026.v14i06.003

Pages: 429-436

Mosquitoes are major vectors of debilitating diseases, and their population dynamics are closely shaped by the ecological conditions of their larval habitats. This study investigated the distribution and abundance of mosquito larvae across eleven Local Government Areas (LGAs) in Ibadan, Oyo State, Nigeria, over a period of two-years. This period encompassing both wet and dry seasons to capture seasonal variability. Mosquito larvae were collected from 99 breeding sites using standard plastic dippers, transported to the laboratory and reared to adulthood. The result showed that a total of 11,498 larvae were identified using morphological traits. Two species Culex and Aedes species were predominant with relative percentage of 45.8 and 37.8 % respectively while Anopheles accounted for 11.1%. The population of the larvae was observed to be influenced by seasonal changes. Nevertheless, Culex species persisted through the dry season (47.1%) and the wet season (44.8%), while Anopheles species were recorded at 12.0% in the dry season and 10.3% in the wet season, the primary malaria vectors, maintained almost same population in both seasons underscoring recurrent transmission risk throughout the year. High mosquito densities were observed in Oluyole (522, 9.9% in the dry season; 695, 11.2% in the wet season) and Ibadan North (502, 9.5% in the dry season; 649, 10.5% in the wet season), whereas comparatively lower densities occurred in Lagelu (421, 7.9% in the dry season; 558, 9.0% in the wet season) and Ido (421, 7.9% in the dry season; 438, 7.0% in the wet season). Lagelu and Ido LGA maintained low populations, likely influenced by water quality, climate, and human activities that limit breeding success. These findings highlighted that urbanization, environmental management, and climatic factors influenced mosquito population and distribution. Emphasis on mosquito borne disease should be tailored toward vector control strategies that integrate habitat sanitation and larval so