Barik Mousumi, Bhattacharjee Indranil, Ghosh Anupam, Chandra Goutam
Mosquito Microbiology and Nanotechnology Research Units, Parasitology Laboratory, Department of Zoology, The University of Burdwan, Bardhaman, West Bengal, India.
Department of Zoology, Dr. Bhupendra Nath Dutta Smriti Mahavidyalaya, Hatgobindapur, West Bengal, India.
BMC Res Notes. 2018 Nov 8;11(1):804. doi: 10.1186/s13104-018-3902-8.
This study assessed the predatory potentiality of two unexplored fishes, Puntius tetrazona and Hyphessobrycon rosaceus on Culex vishnui subgroup larvae in order to utilize natural resources to diminish mosquito population. Larval feeding rate was evaluated in laboratory under varying prey density and volume of water. The experiment was extended to semi field condition.
Puntius tetrazona and H. rosaceus consumed from 66 to 600 and from 87 to 718 Cx. vishnui larvae respectively in laboratory condition at 10 prey density levels (100-1000 larvae) at an increment of 100 larvae at 2 l water volume. In semi field condition, a 78% reduction in larval density was observed at day 30 post introduction of P. tetrazona, whereas 91% reduction was noted on day 21 for H. rosaceus and in the subsequent samples no mosquito larvae were found in ditches. Withdrawal of predators from the ditches resulted gradual increase in larval density. Laboratory and semi field bioassay of both the species indicated their potentiality as efficient mosquito larval predator though H. rosaceus exhibited better performance than P. tetrazona. It is recommended to utilize these natural resources to diminish mosquito population in the countries of their native range.
本研究评估了两种未被探索的鱼类——虎皮鱼（Puntius tetrazona）和玫瑰魮脂鲤（Hyphessobrycon rosaceus）对致倦库蚊（Culex vishnui）亚组幼虫的捕食潜力，以便利用自然资源减少蚊虫数量。在实验室中，于不同猎物密度和水量条件下评估幼虫的摄食率。该实验扩展至半野外条件。
在实验室条件下，当水量为2升，猎物密度水平为10个（100 - 1000只幼虫，每次增加100只幼虫）时，虎皮鱼和玫瑰魮脂鲤分别消耗66至600只和87至718只致倦库蚊幼虫。在半野外条件下，引入虎皮鱼后第30天，幼虫密度降低了78%，而引入玫瑰魮脂鲤后第21天，幼虫密度降低了91%，且在后续样本中沟渠里未发现蚊虫幼虫。从沟渠中移除捕食者后幼虫密度逐渐增加。两种鱼类的实验室和半野外生物测定均表明它们作为高效蚊虫幼虫捕食者的潜力，尽管玫瑰魮脂鲤的表现优于虎皮鱼。建议在其原生范围国家利用这些自然资源减少蚊虫数量。
