Journal
JOURNAL OF VECTOR ECOLOGY
Volume 36, Issue 1, Pages 94-99Publisher
SOC VECTOR ECOLOGY
DOI: 10.1111/j.1948-7134.2011.00145.x
Keywords
Population dynamics; egg survival; hatching; winter diapauses; temperate climate
Categories
Funding
- Agencia Nacional de Promocion Cientifica y Tecnologica [01258]
- Universidad de Buenos Aires [UBACyT X210, X617]
Ask authors/readers for more resources
In temperate regions, populations of Aedes aegypti survive the cold season in the egg stage. In the present work, we studied the cold-season mortality of Ae. aegypti eggs and their subsequent hatching pattern in Buenos Aires city. Eggs were exposed during the winter season (three months) in three neighborhoods located along a gradient of distance toward the Rio de la Plata River, coincident with a gradient of activity of Ae. aegypti. Results showed mortalities lower (30.6%) than those from tropical regions during the dry season. Significant differences were detected among the egg mortalities of each site with a maximum value at the site nearest the Rio de la Plata River (50%), and a minimum value at the most continental site (9%). Post-experimental hatching response of eggs differed between sites, with the highest proportion of hatched eggs during the first immersion in the site nearest to the river and the lowest proportion in the most continental site. The hatching proportion also differed between age classes, with older (early-laid) eggs hatching later than new (late-laid) ones. Our results provide the first information of Ae. aegypti egg mortality in temperate South America and support the hypothesis that differences in egg mortality are associated with abundance patterns of Ae. aegypti in Buenos Aires city. Journal of Vector Ecology 36 (1): 94-99. 2011.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available