mosquitoes in sites of coexistence with Ae aegypti in Medellin Colombia Project 3 Aedes aegypti and Aedes albopictus are two of the worlds most invasive mosquito species Primary transmitter of dengue yellow fever Zika and chikungunya ID: 722584
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Slide1
Egg-laying behavior of
Ae. albopictus mosquitoes in sites of coexistence with Ae. aegypti in Medellin, Colombia
Project 3Slide2
Aedes aegypti and Aedes albopictus
are two of the world’s most invasive mosquito species
Primary transmitter of dengue, yellow fever, Zika, and chikungunya
Aedes aegypti
Aedes albopictus
Secondary transmitter of dengue, Zika, and chikungunyaSlide3
Both species have a very similar ecology
Live in urban environments Feed primarily on human blood during the dayLay their eggs above the water line in containers of standing water, often containers left out by peopleEggs hatch and larvae develop in the waterSlide4
Hypothesis:
Ae. albopictus prefers to lay eggs in containers with Ae. aegypti larvae because it is proof of high-quality
habitat, and this increases competition between the two species.
Ae. albopictus
has previously invaded into places where Ae. aegypti is established
Sometimes Ae. albopictus beats and replaces Ae. aegyptiSometimes this results in failure of Ae. albopictus to establishSometimes the two species co-exist
It’s unclear what drives these variable outcomes. One theory:
Larval competition in locations where there are limited containersSlide5
MARK
RELEASE
RECAPTURE
ProtocolSlide6
(Gracias Ethan)
1. Rear and blood feed
Ae. albopictus,
wait until they are gravid
2
. Mark 30-50 per release house with Day-Glo dust
ProtocolSlide7
Control – just fish food
100 Ae. albopictus
larvae + fish food
3. Clean existing oviposition sites from three houses and seed them with ovitraps with two levels of species and density
Protocol
100 Ae. aegypti
l
arvae + fish food
2
0 Ae. aegypti
larvae + fish food
2
0 Ae. albopictus
larvae + fish food
Control – just fish food
4
. Release marked gravid
Ae. albopictus
females Slide8
6
. Aspirate in release houses and surrounding houses to attempt to collect any
untrapped
marked mosquitoes
Protocol
5. Quantify marked mosquitoes caught in each ovitrapSlide9
Results