Berti Jesús, González Julio, Navarro-Bueno Edith, Zoppi Evelin, Gordon Elizabeth, Delgado Laura
Instituto de Altos Estudios "Dr. Arnoldo Gabaldon", Ministerio del Poder Popular para la Salud, Centro de Investigación en Enfermedades Endémicas, Laboratorio Entomológico de Malaria, Calle Dr. Arnoldo Gabaldon, Las Delicias, Maracay, Venezuela.
Rev Biol Trop. 2010 Jun;58(2):777-87.
Anopheles aquasalis Curry is considered the main vector of human malaria in Northern Venezuela. A longitudinal study was carried out in the coastal areas of the Paria Peninsula, Sucre state. The larval habitats of A. aquasalis were classified as: 1--Brackish mangrove, and 2--Freshwater herbaceous swamp. Field surveys of mosquito larvae and aquatic insects were carried out in the same breeding sites over a one-year period, between January and December 1999. At each site, 30 samples of Anopheles larvae and aquatic insects were taken monthly. Simultaneously with mosquito larvae sampling, five selected variables of water were measured: conductivity, salinity, dissolved oxygen, temperature and pH. Seasonal and temporal variations of A. aquasalis larvae and aquatic insects were determined in the two larval habitats. For the entire study period, the abundance of larvae was higher in the mangrove. Correspondence analysis showed a strong relation between some chemical factors of water and larval abundance. The abundance of A. aquasalis larvae in both seasons, was positively correlated with water salinity, pH and conductivity, and negatively and with dissolved oxygen in the dry season. The presence of larvae was positively correlated with the presence of Avicenia germinans. In the mangrove there was a positive association between larvae abundance and Scirtidae family abundance and a negative correlation between larvae abundance and monthly precipitation (Spearman), as well as a significant negative correlation between Gerridae abundance and monthly precipitation. In the herbaceous swamp, there were not significant associations between A. aquasalis larvae abundance and abundance of others aquatic insects associated to habitat.
库里按蚊被认为是委内瑞拉北部人类疟疾的主要传播媒介。在苏克雷州帕里亚半岛的沿海地区开展了一项纵向研究。库里按蚊的幼虫栖息地被分类为：1——咸淡水红树林，以及2——淡水草本沼泽。1999年1月至12月期间，在同一繁殖地点对蚊虫幼虫和水生昆虫进行了为期一年的实地调查。在每个地点，每月采集30份按蚊幼虫和水生昆虫样本。在采集蚊虫幼虫样本的同时，测量了五个选定的水质变量：电导率、盐度、溶解氧、温度和pH值。确定了咸淡水红树林和淡水草本沼泽这两种幼虫栖息地中库里按蚊幼虫和水生昆虫的季节和时间变化。在整个研究期间，红树林中的幼虫数量更多。对应分析表明，一些水质化学因素与幼虫数量之间存在密切关系。两个季节中库里按蚊幼虫的数量均与水的盐度、pH值和电导率呈正相关，而在旱季与溶解氧呈负相关。幼虫的存在与白骨壤的存在呈正相关。在红树林中，幼虫数量与阎甲科昆虫数量呈正相关，与幼虫数量和月降水量呈负相关（斯皮尔曼相关性），以及仰蝽科昆虫数量与月降水量之间存在显著负相关。在草本沼泽中，库里按蚊幼虫数量与其他与栖息地相关的水生昆虫数量之间没有显著关联。
