Venus Bantoto-Kinamot and Jaydon Soringa Lomoljo

DOI: 10.14456/sjst-psu.2021.200

pp. 1535 - 1541

Abstract

This study examined the response and tolerance of freshwater-derived Aedes aegypti and Aedes albopictus on salinity.
Pre-imaginal stages of both species were exposed to salt concentration ranging from 3.5, 7, 10.5 ppt under laboratory conditions.
The maximum salinity tolerance of Ae. aegypti and Ae. albopictus was at 7 ppt. Survival rate ranged from 53% to 93% and 63%
to 90% for Ae. aegypti and Ae. albopictus, respectively. Percent emergence of Ae. aegypti ranged from 50% to 90%; 60% to 90%
for Ae. albopictus. As salinity increases, larval duration increases while growth rate decreases. The LC50 for Ae. aegypti ranged
from 6.1-7.1 ppt while LC90 ranged from 9.8-11.6 ppt. The LC50 of Ae. albopictus ranged from 6.5-7.1 ppt while LC90 ranged
from 10.4-11.6 ppt. Findings of this study confirmed the need to implement control programs for mosquito vectors that also
target brackishwater.