Irving-Bell R J, Okoli E I, Diyelong D Y, Lyimo E O, Onyia O C
Department of Zoology, University of Jos, Nigeria.
Med Vet Entomol. 1987 Jul;1(3):243-50. doi: 10.1111/j.1365-2915.1987.tb00350.x.
Exit traps, placed over the air vents of septic tanks, were used to examine species diversity and relative abundance of mosquitoes breeding in ammonia-rich waters of septic tanks. Of the six species found, Culex decens Theobald and Culex cinereus Theobald appeared to be competing successfully with Culex quinquefasciatus Say during the wet season but not during the long dry season. The seasonal timing of their displacement by Cx quinquefasciatus was variable and did not correlate well with climatic factors. The three other species present, generally during the wet season and early dry season, were Culex tigripes G. & C., Culex horridus Edwards and Aedes aegypt (L.). Experimental bucket ovitraps were used to assess preference towards covered (dark) septic tank water in comparison with sunlit septic tank water, covered and sunlit compost water. These were colonized by Cx quinquefasciatus, Cx decens, Ae. aegypti and Ae. vittatus Bigot. The covered septic tank water was more abundantly colonized by Cx quinquefasciatus and marginally so by the two Aedes species. Cx decens appeared to colonize the exposed compost water more readily in the dry season, but changed to the covered septic tank water in the wet season. The discussion centres around competition between these mosquitos species and concludes that it would be useful to know what environmental factors, or what aspects of competition, lead to severe natural reductions in the abundance of the major pest species Cx quinquefasciatus.
在化粪池通风口上方放置诱捕装置，用于检测在化粪池富含氨的水体中繁殖的蚊子的物种多样性和相对丰度。在所发现的六个物种中，德氏库蚊和灰黑库蚊在雨季似乎能成功地与致倦库蚊竞争，但在漫长的旱季则不然。致倦库蚊取代它们的季节时间并不固定，与气候因素的相关性也不强。另外三个物种通常在雨季和旱季早期出现，分别是条纹库蚊、凶小库蚊和埃及伊蚊。使用实验性桶式诱蚊产卵器来评估蚊子对化粪池覆盖（黑暗）水体与阳光照射的化粪池水体、覆盖和阳光照射的堆肥水体的偏好。这些诱蚊产卵器中出现了致倦库蚊、德氏库蚊、埃及伊蚊和白线斑蚊。致倦库蚊在覆盖的化粪池水体中繁殖得更多，两种伊蚊在其中的繁殖量略少。德氏库蚊在旱季似乎更容易在暴露的堆肥水体中繁殖，但在雨季则转向覆盖的化粪池水体。讨论围绕这些蚊子物种之间的竞争展开，并得出结论，了解哪些环境因素或竞争的哪些方面会导致主要害虫物种致倦库蚊的数量大幅自然减少将是有益的。
