Tyagnes-Hanindia Desca, Sumanto Didik, Sayono Sayono
District Health Office of Demak District Government, Central Java Province, Indonesia.
Undergraduate School in Public Health Science, Faculty of Public Health, Universitas Muhammadiyah Semarang, Semarang, Indonesia.
J Arthropod Borne Dis. 2023 Jun 30;17(2):120-127. doi: 10.18502/jad.v17i2.13617. eCollection 2023 Jun.
Reduction of the population is the priority effort to control dengue virus transmission including the use of larvivorous fish. Biologically, the predatory efficiency of fish will slow down when the water acidity and temperature change from normal conditions. This study aimed to determine the predatory efficiency of three species of larvivorous fish against the larvae in different water temperatures.
Three well-known species of larvivorous fish namely , and were placed into 12 cm diameter jars with three water temperature ranges namely 20-21 °C, 27-28 °C, and 34-35 °C, and allowed to three days acclimatization. As many as one hundred 4-instars larvae of were gradually entered into each jar, and a longitudinal observation was made at 5, 10, 30, 60, 120, 240, 360, 480, 600, and 720 minutes. The predated larvae were recorded.
In normal temperature ranges, the predatory efficiency of the larvivorous fish was 75%, 72.3%, and 32.8% for , and , respectively. The predation abilities decreased due to temperature changes. and indicated the best predatory efficiency against larvae in different temperature conditions.
is the best larvivorous fish in the lower to normal, but is the best in the normal to higher temperature ranges. This finding should be considered by public health workers in selecting larvivorous fish to control the Dengue vectors.
减少种群数量是控制登革热病毒传播的首要任务，包括使用食蚊鱼。从生物学角度来看，当水的酸碱度和温度偏离正常条件时，食蚊鱼的捕食效率会降低。本研究旨在确定三种食蚊鱼在不同水温下对登革热幼虫的捕食效率。
将三种著名的食蚊鱼，即 、 和 放入直径为12厘米的罐子中，水温设置为三个范围，即20 - 21°C、27 - 28°C和34 - 35°C，并让它们适应三天。将100只四龄期的 幼虫逐渐放入每个罐子中，并在5、10、30、60、120、240、360、480、600和720分钟时进行纵向观察。记录被捕食的幼虫数量。
在正常温度范围内， 、 和 三种食蚊鱼的捕食效率分别为75%、72.3%和32.8%。捕食能力因温度变化而下降。在不同温度条件下， 和 对 幼虫表现出最佳的捕食效率。
在低温到正常温度范围内， 是最佳的食蚊鱼，但在正常温度到高温范围内， 是最佳的。公共卫生工作者在选择食蚊鱼来控制登革热传播媒介时应考虑这一发现。
