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Distention-mediated egg maturation in the mosquito,Aedes aegypti
Affiliation:1. Laboratory of Paper Coating and Converting, Center for Functional Materials, Åbo Akademi University, Porthansgatan 3, FI-20500 Åbo, Turku, Finland;2. Aerosol Physics, Faculty of Natural Sciences, Tampere University of Technology, P.O. Box 692, FI-33101 Tampere, Finland;3. Medical Microbiology and Immunology, University of Turku, Kiinamyllynkatu 13, FI-20520 Turku, Finland;4. Laboratory of Physical Chemistry, Åbo Akademi University, Porthansgatan 3, FI-20500 Åbo, Turku, Finland;5. Department of Chemistry, University of Eastern Finland, P.O. Box 111, FI-80101 Joensuu, Finland;6. Research Institutes of Sweden, RISE Bioscience and Materials/Chemistry Materials and Surfaces, Drottning Kristinas väg 45, Box 5607, SE-11486 Stockholm, Sweden
Abstract:Abdominal distention accelerates the release of a factor from the head of blood-fed Aedes aegypti mosquitoes. The critical period during which the head is required for oögenesis following blood ingestion is approx 6 h with a 5 μl meal, but small blood meals of 1 μl require the head to be present for significantly longer. Increasing the abdominal distention by supplementing the 1 μl meal with saline results in a critical period similar to that with 5 μl of blood. The information from the distended abdomen appears to travel via the ventral nerve cord. Transection of the ventral nerve cord prevents oögenesis from occurring after small blood meals, but not with larger blood volumes. Topical application of 100 pg of juvenile hormone III can substitute for the distention message.
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