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Uherek C.B.,Escola Superior Batista do Amazonas | Uherek C.B.,University of Alberta | Pinto Gouveia F.B.,Escola Superior Batista do Amazonas | Pinto Gouveia F.B.,National Institute of Amazonian Research
International Journal of Ecology | Year: 2014

Aquatic environments are being modified by anthropogenic activities regarding their biological, physical, and chemical conditions; even pristine aquatic ecosystems can be threatened. This study focused on the biological monitoring of Maroaga Stream - a first order stream located in an Environmental Protection Area in the Amazon using the Biological Monitoring Working Party (BMWP) Score System. The BMWP Score System revealed that the Maroaga Stream was a Class I stream (score of 138 points), indicating clean or not significantly altered water quality. The results suggest the adequate environmental conditions and ecological responses of the Maroaga Stream. © 2014 Christiane Brito Uherek and Fernando Bernardo Pinto Gouveia. Source


de Macedo F.A.F.,State University of Maringa | Lourenco F.J.,Federal University of Mato Grosso | Santello G.A.,Escola Superior Batista do Amazonas | Martins E.N.,State University of Maringa | And 2 more authors.
Acta Scientiarum - Animal Sciences | Year: 2014

The accuracy of the FAMACHA© method was evaluated on the identification of female sheep fed two levels of crude protein, naturally infected with Haemonchus contortus, by means of the correspondent hematocrit value. Forty-seven female sheep of the breeds Santa Inês (n = 16), Texel (n = 16) and Ile de France (n = 15) aged between eight and twelve months were assigned to two treatments, 12 or 16% crude protein in the diet. All the animals were wormed thirty days before the first data collections, which were done fortnightly between July 2005 and March 2006. The color of the ocular conjunctiva was individually evaluated according to the precepts of the FAMACHA© method and the hematocrit value of each animal was obtained in laboratory. A correlation of 1:0.7991 was found between the hematocrit values and the classification given by the FAMACHA© method aiming to identify animals with different degrees of anemia. The method was efficient to identify animals to worm, thus representing a support in the identification of animals susceptible to Haemonchus contortus. Source


da Cunha N.C.,Federal Rural University of Rio de Janeiro | Rangel C.P.,Federal Rural University of Rio de Janeiro | Piranda E.M.,Escola Superior Batista do Amazonas | de Rezende J.,Federal Rural University of Rio de Janeiro | And 2 more authors.
Ciencia Rural | Year: 2010

This study assesses the weight gain of partially engorged Rhipicephalus sanguineus females that were artificially fed via capillary tubes and the influence of capillary tube feeding on the biological parameters of the non-parasitic stage of the species. The ticks were sorted into four groups, each containing ten females of a homogeneous weight. The groups were each treated for different feeding times, 2, 6, 12 and 24 hours. The weight gain of the artificially fed females was measured, and the biological parameters of the non-parasitic stage of the tick were observed for each treatment group. The statistical non- parametrical Dunn and Kruskal-Wallis tests were used to compare the results. The mean weights (mg) were 0.2±2.4; 4.3±5.8; 7.4±5.8 and 12.0±11.2 for the 2, 6, 12 and 24 hours feeding groups, respectively. The weight of the fed groups increased as the capillary feeding time increased, and this relationship was highly significant (P<0.05) between the groups fed for 2 and 24 hours. No statistically significant differences (P>0.05) were observed in the parameters of the non-parasitic stage for the artificially fed groups. It can be concluded that artificial feeding via capillary tubes provides an efficient and easy method for the artificial intake of blood by R. sanguineus. Furthermore, it was noted that the ticks fed in vitro were able to establish a new generation. The experimental method shows great promise in studies that aim to investigate biological disease agents. Source

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