Results: 293

A new species of Tereancistrum (Monogenea: Dactylogyridae), parasite of Prochilodus lineatus (Characiformes: Prochilodontidae) from southeast Brazil

Abstract A new species of Tereancistrum Kritsky, Thatcher & Kayton, 1980 collected of Prochilodus lineatus gills from the Batalha River, Tietê-Batalha basin, São Paulo State, Brazil is described. The new species can be distinguished from its congeners mainly by the configuration of the ventral bar,...

Short-term response of fish assemblages to instream habitat restoration in heavily impacted streams

Neotrop. ichthyol; 18 (1), 2020
Habitat homogenization has been a major impact in stream ecosystems, and it is considered one of the main drivers of biotic homogenization as well, leading to the loss of water quality and fish diversity. In this study, we added artificial woody structures and leaf packs in physically impacted streams to...

Padrão sazonal dos casos de malária e a relação com a variabilidade hidrológica no Estado do Amazonas, Brasil

Rev. bras. epidemiol; 23 (), 2020
RESUMO: Introdução: A malária é uma doença infecciosa de alta transmissão na região amazônica, porém sua dinâmica e distribuição espacial podem variar, dependendo da interação de fatores ambientais, socioculturais, econômicos e políticos e serviços de saúde. Objetivo: Verificar a e...

Saúde dos rios, saúde dos povos e do planeta: um olhar sobre o documentário Saúde! Velho Chico, de Stella Oswaldo Cruz Penido e Eduardo Vilela Thielen

RECIIS (Online); 13 (4), 2019
Análise do documentário Saúde! Velho Chico, de Stella Oswaldo Cruz Penido e Eduardo Vilela Thielen, tomando-o como registro, a um só tempo, dos padrões históricos de interação com o Rio São Francisco e de alternativas capazes de construir uma relação mais sinérgica e sustentável com as água...

Myxobolus sp. (Myxozoa; Myxosporea) causing asymptomatic parasitic gill disease in Astyanax aff. bimaculatus (Characiformes; Characidae) in the Tocantins river basin, amazon region, Brazil

Abstract The middle course of the Tocantins river is located in the eastern portion of the "Legal Amazon" region of Brazil and the Dantas river is one of its tributaries. Among the components of the aquatic biota, eukaryote microparasites establish direct relationships with several species of fish and ha...

First report of Artystone trysibia (Isopoda: Cymothoidae) in Caquetaia spectabilis (Cichliformes: Cichlidae)

Abstract The present study provides the first record of an isopod parasite (Artystone trysibia) on Caquetaia spectabilis, a cichlid from the eastern Amazon collected in the State of Amapá, northern Brazil. In May 2018, specimens of C. spectabilis were collected in the lower Jari River, and 33.3% were pa...

Infectivity of Simulium damnosum s.l. and therapeutic coverage of ivermectin distribution 10 years post treatment around Owena Dam, Ondo state, Nigeria

Braz. j. infect. dis; 23 (6), 2019
ABSTRACT Background: Studies related to infectivity status of insect vectors are seen as necessities in understanding the epidemiology of vector-borne diseases and planning effective control measures. This study assessed the infectivity ofSimulium damnosum s.l. around Owena River as well as evaluated th...

Reproductive ecology of Otocinclus vittatus (Regan, 1904) in the Pantanal floodplain, upper Paraguay River basin

Braz. j. biol; 79 (4), 2019
Abstract We studied the reproductive biology of Otocinclus vittatus in the southern Pantanal, Brazil. A total of 1066 fishes were analyzed (490 males, 488 females and 88 individuals of undetermined sex), sampled with a rectangular sieve and a seine net from February/2009 to January/2011. Variations in t...

Genotoxicity effects on Geophagus brasiliensis fish exposed to Doce River water after the environmental disaster in the city of Mariana, MG, Brazil

Braz. j. biol; 79 (4), 2019
Abstract The Doce River basin has suffered the largest environmental accident ever occurred in Brazil with the influx of tailings from Fundão and Santarém, belonging to Samarco mining company, due to the disaster in Mariana. A spill between 50 and 60 million m3 of tailings was estimated by the company...

Ecotoxicological risk assessment due to the presence of bisphenol A and caffeine in surface waters in the Sinos River Basin - Rio Grande do Sul - Brazil

Braz. j. biol; 79 (4), 2019
Abstract Bisphenol A (BPA) is an emerging contaminant, regularly detected in aquatic ecosystems, considered as an endocrine disrupting compound (EDC). Caffeine is another chemical related to human activity, often found in surface waters. The objective of this study was to evaluate the ecotoxicological r...