[Characterization of Aedes albopictus (Skuse, 1894) (Diptera:Culicidae) larval habitats near the Amazon River in Colombia].
BACKGROUND
Because the role of Aedes albopictus as an incriminated vector of several viral pathogens, its control is important to human health. To establish appropriate control methods, characterization of the larval habitats is a necessary first step.


OBJECTIVE
Habitats of the immature stages of Ae. albopictus were characterized with respect to physical-chemical parameters and by floral and faunal arrays present.


METHODS
Leticia is located at the southernmost tip of Colombia on the banks of the Amazon River. In the urban area, 154 houses were inspected in December 2002 and January 2003. Physical-chemical data were collected, including exposure to sunlight, location, container size and material, water conductivity, and dissolved oxygen. Macroinvertebrates and plankton samples were taken at each positive larval site. The results were compared using descriptive analysis, principal component analysis, classification dendrograms, and diversity indexes.


RESULTS
Twenty-one habitats were found positive for Diptera, and 13 were positive for Ae. albopictus larvae. Most of the positive habitats (92%) were located near the houses--they were small or medium size receptacles located in the shade. This water generally had low conductivity and low turbidity, although high values of these parameters were also identified. The habitats had low diversity indexes for macroinvertebrates and high diversity indexes for plankton. In the principal component analysis, significant correlation was found with mites, oligochaetes and hemipterans (the macroinvertebrates) and with bacilarophyceaes, clorophyceaes and cianophyceas (the algal forms).


CONCLUSIONS
In Leticia, females of Ae. albopictus were found in newly established habitats with sufficient availability of resources, low conductivity, and turbidity, lower intra-and interspecific competition.
Carvajal
José Joaquín
JJ
Universidad Nacional de Colombia, Leticia, Colombia. jjcarvajalc@unal.edu.co
Moncada
Ligia Inés
LI
Rodríguez
Mauricio Humberto
MH
Pérez
Ligia del Pilar
Ldel P
Olano
Víctor Alberto
VA
D000330:Aedes / Q000502:physiology*; D000818:Animals; D003105:Colombia; D017753:Ecosystem; D007814:Larva; D045483:Rivers