Navegando por Orientadores "MASCARENHAS, Bento Melo"

Agora exibindo 1 - 2 de 2

Acesso aberto (Open Access)
Contribuição ao conhecimento da fauna anofélica antropofílica da Praia da Saudade na Ilha de Cotijuba - Belém - Pará: uma área endêmica da malária
(Universidade Federal do Pará, 2004-04-11) GUIMARÃES, Delma Gomes; MASCARENHAS, Bento Melo; http://lattes.cnpq.br/3279744837272788
In spite of its localization near the city of Belém, Pará, Cotijuba Island has been the site of outbreaks of malaria during recent years, especially in the months of April and May. The island is part of an archipelago at the southern margin of Marajó Bay, located 29 km from Belém, as an island portion of the municipality of Belém. The island has a total area of about 60 km² and 20 km of beaches that correspond to about 66% of the total area. Because of the epidemic, it tias become necessary to identify the anopheline species that are the malaria vectors on the island. From 2002 to 2004 periodic collections were made of mosquito larvae and adults, and their breeding sites were located and characterized. Larvae were collected with dippers, while adults were collected manually in individual tubes from human volunteers. Two collections were made of adults in forested areas, one collection during the dry season and the other during the rainy season. Each collection was made during a continuous 24 hour period. Six bi-monthly collections were made near residents' houses, each lasting 6 hours. Both in the forest and near houses, only two species of anophelines were found to bite people, Anopheles (Nyssorhynchus) aquasalis and Anopheles (Anopheles) intennedius. A. aquasalis was more common near houses, whereas A. intermedius was more common in the forest. Most of the island's malaria cases were found to occur two months after the beginning of the rainy season, in the month of May. On all of Cotijuba Island there are four lakes that are possible anopheline breeding sites, and Gabriela Lake is the principal breeding site, responding for 42% of the malaria cases on the island during 2003. Climatic conditions, the resident population's behavior and housing, and the lack of resources for effective vector control, among other factors, favor the continual presence of malaria on Cotijuba Island.
Acesso aberto (Open Access)
Os mosquitos (Diptera : Culicidae) da Estação Científica Ferreira Penna - ECFPn, Caxiuanã, Melgaço Pará, Brasil: ataque, sazonalidade e estratificação arbórea
(Universidade Federal do Pará, 1996-12-10) ROCHA, José Almir Moraes da; BARATA, José Maria Soares; http://lattes.cnpq.br/5244792275470127; MASCARENHAS, Bento Melo; http://lattes.cnpq.br/3279744837272788
This research was developted in 1995 from February to December, at the Ferreira Penna Research Station, in the municipality of Melgaço, state of Pará, within the Caxiuanã National Forest, with the objective of study the seasonal and daily activities in the forest and anthropic environment and the levels at which various species are found in the forest. The collects were made using human bait and CDC light trap with bird bait in the forest at ground and canopy and human bait in the anthropic environment. The total collection consisted of 1.919 mosquitoes belonging to the genera Aedes Meigen, 1818, Anopheles Meigen, 1818, Haemagogus Williston, 1896, Psorophora Robineau-Desvoidy, 1827, Culex Linnaeus, 1758, Coquillettidia Dyar, 1905, Mansonia Blanchard, 1904, Uranotaenia Lynch-Arribalzaga, 1891, Limatus Theobald, 1901, Phoniomyia Theobald, 1903, Ruchomyia Theobald, 1903, Sabethes Robineau-Desvoidy, 1827, Trichoprosopon Theobald, 1901 e Wyeomyia Theobald, 1901. The predominant species were Culex (Melanoconion) portes! Senevet & Abonnec, 1941 (50,65%), Coquillettídia (Rhynchotaenia) venezuelensis (Theobald, 1912) (9,17%) and Haemagogus (Haemagogus) janthinomys Dyar, 1921 (6,51%). The daily and seasonal activities of mosquitoes species was correlated with temperature, relative humidity and rainfall, using the Spearman correlation, and statistically significant relations were found for some species with these factors. The hypothesis of the significative difference between the species and exemplaries mosquitoes number at ground and canopy was tested using X² test, that was just significant between the exemplaries mosquitoes number at ground and canopy in human bait in the forest.