The fact that this normally happens only when more water is added to a container increases the probability that a container will have enough water for the larvae to complete their development before the container dries out.
While male mosquitoes feed only on plant juices, females suck blood from animals to get the nutrients they need to develop their eggs.
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First-time dengue infections in children are usually mild and often unnoticed, but first-time infections in adults may be severe.
Fatalities are rare, but high fever, chills, headache, vomiting, severe prostration, muscle and bone aches and severe weakness for more than a month after the fever subsides make dengue fever an illness that many adults remember as the worst sickness they ever experienced.
These case studies start by showing how changes in the human social system changed human - ecosystem interaction in ways that in turn have changed the ecosystem with detrimental consequences for people.
Each case study then demonstrates how people can translate ecological ideas into concrete actions to move human - ecosystem interaction in a healthier and more sustainable direction.
Originally a tree-hole-breeding mosquito in Africa, it long ago acquired an urban life style by breeding in similar situations around human habitations.