@article{fdi:010077210, title = {{T}olerance of disease-vector mosquitoes to brackish water and their osmoregulatory ability}, author = {{K}engne, {P}ierre and {C}harmantter, {G}. and {B}londeau-{B}idet, {E}. and {C}ostantini, {C}arlo and {A}yala, {D}iego}, editor = {}, language = {{ENG}}, abstract = {{S}alinity tolerance is an important trait that governs the ecology of disease-vector mosquitoes by determining their choice of larval habitat, and consequently their ecological and geographical distribution. {H}ere, we used laboratory strains to determine the osmotic responses of larvae of obligate freshwater disease-vector mosquitoes ({A}edes aegypti, {A}edes albopictus, {A}nopheles coluzzii, {A}n. gambiae, {C}ulex pipiens, and {C}x. quinquefasciatus) and assessed their relationship with salinity tolerance. {F}irst, we analyzed the acute dose-mortality response of fourth-instar larvae to salinity; then, we measured their hemolymph osmolality after 24-h exposure to varying salinities. {W}e found that {A}e. albopictus was the most tolerant species, followed by {A}n. coluzzii, {A}e. aegypti, {C}x. quinquefasciatus, and {A}n. gambiae, in decreasing order. {C}x. pipiens was the least tolerant species. {A}ll mosquitoes were hyper-iso-osmoregulators, but with species-specific differences. {S}pecifically, hemolymph osmolality in deionized water varied among species, and {C}x. pipiens and the two {A}edes species showed the lowest and highest osmolality. {A}lthough all species were osmoconformers at higher salinity values, hemolymph osmolality approached environmental osmolality more rapidly in species of the {C}ulex genus, compared with {A}edes species where it increased slowly. {M}oreover, hemolymph osmolality in deionized water was significantly correlated with tolerance to salinity across species. {T}his could allow predicting the salinity tolerance of untested species on the basis of their osmoregulatory ability. {H}owever, this correlation disappeared when considering the hemolymph osmolality of larvae exposed to salinities higher than deionized water.}, keywords = {adaptation ; {A}edes ; {A}nopheles ; {C}ulex ; hemolymph osmolality ; lethal concentration ; mosquitoes ; osmoregulation ; salinity tolerance}, booktitle = {}, journal = {{E}cosphere}, volume = {10}, numero = {10}, pages = {art. e02783 [14 ]}, ISSN = {2150-8925}, year = {2019}, DOI = {10.1002/ecs2.2783}, URL = {https://www.documentation.ird.fr/hor/fdi:010077210}, }