Ochlerotatus togoi

Theobald, 1907

Ochlerotatus togoi is a salt-tolerant euryhaline mosquito that inhabits coastal rock pools with salinities ranging from freshwater to seawater. It is a known of flaviviruses and filarial worms affecting humans, including Wuchereria bancrofti and Brugia . Rising sea levels have expanded its suitable , increasing public health concerns in coastal regions. Laboratory studies show complex salinity-dependent traits: highest oviposition preference occurs in freshwater, yet optimal development occurs at moderate salinities around 25 psu.

Pronunciation

How to pronounce Ochlerotatus togoi: /ˌɒklɪroʊˈteɪtəs ˈtoʊɡoʊaɪ/

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Habitat

Coastal rock pools containing mixtures of seawater and rainwater; stagnant water in artificial structures near coasts. Tolerates euryhaline conditions from freshwater (0 psu) to high salinity (50 psu), with physiological adaptations for osmotic regulation including active ion via gastric caeca, , and anal papilla.

Distribution

South Korea (Geoje, Jeju, Pohang); North America; Southern Asia; Canada. Primarily coastal areas with documented presence in East Asian and North American coastal regions.

Host Associations

humans - bites; transmits flaviviruses and filarial wormsprimary epidemiological concern
Wuchereria bancrofti - lymphatic
Brugia malayi - lymphatic
Brugia pahangi - filarial worm
Brugia patei - filarial worm
Brugia tupiae - filarial worm
Brugia timori - filarial worm
Dirofilaria immitis - (laboratory); demonstrated in laboratory conditions

Life Cycle

are laid in rock pools and stagnant coastal water. Hatching rate peaks at 10 psu salinity (72.11%). Larval development proceeds through , with highest pupation rate at 25 psu. rate is highest at 5 psu. Overall development rate is maximized at 25 psu despite oviposition preference for freshwater. Developmental studies conducted at 27°C ± 1°C, 70% humidity, 12:12 L:D .

Behavior

Exhibits salt-tolerant euryhaline physiology with active ion mechanisms. Oviposition preference decreases markedly with increasing salinity above 15 psu, creating a mismatch between preferred oviposition sites and optimal developmental conditions.

Ecological Role

with potential for increased expansion and disease transmission risk due to rising sea levels and coastal salinization. Population can be predicted from salinity changes using the regression equation y = −14.318 + 9.821x, where y = incidence rate and x = salinity.

Human Relevance

Public health concern as of lymphatic and potentially other . Risk of Oc. togoi-borne is increasing with climate change-induced sea level rise and coastal expansion. Control strategies must account for its euryhaline and salinity-dependent .

More Details

Taxonomic Note

Listed as synonym of Aedes togoi in some databases; Ochlerotatus togoi reflects historical -level classification within the Aedes/Ochlerotatus complex.

Climate Change Implications

Rising sea levels have created more favorable environments for Oc. togoi, with documented range expansion and increased transmission risk in coastal South Korea.