Trophic functional characterization of chironomidae larvae (Diptera: Chironomidae) in a first order stream at the mountain region of Rio de Janeiro State, Brazil

1998 ◽  
Vol 26 (4) ◽  
pp. 2115-2119 ◽  
Author(s):  
Jorge Luiz Nessimian ◽  
Angela Sanseverino
Keyword(s):  
Rio De Janeiro ◽  
Functional Characterization ◽  
Mountain Region ◽  
Order Stream ◽  
First Order ◽  
Chironomidae Larvae ◽  
Janeiro State

Characterization of the zoonotic potential of Toxoplasma gondii in horses from Rio de Janeiro State

Acta Tropica ◽  
2017 ◽  
Vol 171 ◽  
pp. 159-162 ◽  
Author(s):  
Sabrina S. Venturi ◽  
Andressa F. da Silva ◽  
Edwards Frazão-Teixeira ◽  
Francisco C.R. de Oliveira ◽  
Angélica Consalter ◽  
...  
Keyword(s):  
Toxoplasma Gondii ◽  
Rio De Janeiro ◽  
Zoonotic Potential ◽  
Janeiro State

scholarly journals Diversity and habitat preference of aquatic insects along the longitudinal gradient of the Macaé River basin, Rio de Janeiro, Brazil

2001 ◽  
Vol 61 (2) ◽  
pp. 249-258 ◽  
Author(s):  
D. F. BAPTISTA ◽  
D. F. BUSS ◽  
L. F. M. DORVILLÉ ◽  
J. L. NESSIMIAN
Keyword(s):  
River Basin ◽  
Aquatic Insects ◽  
Habitat Preference ◽  
Rainy Season ◽  
Rio De Janeiro ◽  
Dry Season ◽  
Longitudinal Gradient ◽  
Order Stream ◽  
Surber Sampler ◽  
Janeiro State

Diversity and habitat preference of macroinvertebrates were studied in Macaé River basin, Rio de Janeiro State, Brazil, along its longitudinal gradient. We selected stream reaches corresponding to 1st, 2nd, 4th, 5th and 6th orders. A Surber sampler was used to collect four macroinvertebrates samples of each substrate (sand, litter in pool areas, stones, and litter in riffle areas) during the three sampling periods, defined based on the rain regime: April (end of the rainy season), July (dry season), and October (beginning of the rainy season). We identified 46,431 specimens corresponding to 117 taxa. Analysis of diversity numbers (both for family or genus level) indicated that all insect taxonomic orders had higher numbers on 2nd order stream reach, except for Ephemeroptera, on 4th order. However when considering morph-species taxonomic level, the higher diversity number occurred on 4th order stream. The highest richness and diversity numbers were found at the dry season. Considering habitat preference, both litter in pool areas and litter in riffle areas had the highest faunal richness.

scholarly journals Morphobiological, morphometric and ultrastructural characterization of sylvatic Trypanosoma cruzi isolates from Rio de Janeiro state, Brazil

2019 ◽  
Vol 79 (2) ◽  
pp. 294-303 ◽  
Author(s):  
C. Santos da Silva ◽  
A. L. Carbajal-de-la-Fuente ◽  
C. E. Almeida ◽  
T. C. M. Gonçalves ◽  
J. Reis dos Santos-Mallet
Keyword(s):  
Trypanosoma Cruzi ◽  
Rio De Janeiro ◽  
Natural Infection ◽  
Growth Curves ◽  
Maximum Growth ◽  
Ultrastructural Characterization ◽  
High Prevalence ◽  
Janeiro State

Abstract Triatoma vitticeps is a triatomine with geographic distribution restrict to Brazil, which exhibits high prevalence of Trypanosoma cruzi natural infection. Of special epidemiologic concern, this species often invades households in the states of Rio de Janeiro, Minas Gerais and Espírito Santo. The objective of this study was to evaluate morphological and ultrastructural parameters on three T. cruzi isolates obtained from wild T. vitticeps specimens. The growth and cell differentiation of the parasite was evaluated through epimastigote and trypomastigote forms obtained in the growth curves for three distinct isolates. The maximum growth showed differences at the 20th day of the curve. Our in vitro results show a heterogeneity, regarding these features for samples cultivated under the same conditions. Morphometric analyzes based on the shape of epimastigotes and trypomastigotes corroborated such differentiation. These results highlight the need of better understanding the meaning of this diversity under an eco-epidemiological perspective.

scholarly journals Variation and life strategies of the Trichoptera (Insecta) larvae community in a first order tributary of the Paquequer River, Southeastern Brazil

2000 ◽  
Vol 60 (1) ◽  
pp. 73-82 ◽  
Author(s):  
A. A. HUAMANTINCO ◽  
J. L. NESSIMIAN
Keyword(s):  
Rio De Janeiro ◽  
Life Cycles ◽  
Southeastern Brazil ◽  
Life Strategies ◽  
First Order ◽  
Janeiro State ◽  
General Profile

The Trichoptera fauna was sampled in a first order tributary of Paquequer River, in the district of Teresópolis, Rio de Janeiro State. Quantitative samples of litter from pools, litter from riffles, sand, and stones were taken on each season from February 1991 to February 1992.The life cycles of common genera were categorized into three groups of biological strategies. The largest group represented the general profile of the community, in which ultimate instar larvae were predominant in spring and the younger ones in summer. Probably, emergence and oviposition occur in spring.

Molecular detection, characterization of Anaplasma spp. in domestic cats from Rio de Janeiro state

Acta Tropica ◽  
2019 ◽  
Vol 191 ◽  
pp. 239-242 ◽  
Author(s):  
Andresa Guimarães ◽  
Juliana Macedo Raimundo ◽  
Maristela Peckle Peixoto ◽  
Claudia Bezerra da Silva ◽  
Marcus Sandes Pires ◽  
...  
Keyword(s):  
Rio De Janeiro ◽  
Molecular Detection ◽  
Domestic Cats ◽  
Janeiro State

scholarly journals SPATIO TEMPORAL CHARACTERIZATION OF INTERTIDAL MACROFAUNA AT PRAINHA BEACH (RIO DE JANEIRO STATE)

1997 ◽  
Vol 03 (01) ◽  
pp. 213-225 ◽  
Author(s):  
V G Veloso ◽  
R S Cardoso ◽  
D B Fonseca
Keyword(s):  
Rio De Janeiro ◽  
Spatio Temporal ◽  
Janeiro State

Prevalence and Molecular Characterization of Dirofilaria immitis (Filarioidea: Onchocercidae) in Dogs from Endemic Areas of Rio De Janeiro State, Brazil

10.1645/18-96 ◽  
2019 ◽  
Vol 105 (2) ◽  
pp. 387 ◽  
Author(s):  
M. S. G. Silva ◽  
D. Leles ◽  
A. P. Sudré ◽  
P. R. Millar ◽  
F. Uchôa ◽  
...  
Keyword(s):  
Molecular Characterization ◽  
Rio De Janeiro ◽  
Dirofilaria Immitis ◽  
Endemic Areas ◽  
Janeiro State

scholarly journals The Participatory Construction of Agro-Ecological Knowledge As A Soil Conservation Strategy In The Mountain Region of Rio de Janeiro State (Brazil)

2018 ◽  
Vol 3 (1) ◽  
pp. 17-24
Author(s):  
Renato Linhares de Assis ◽  
Adriana Maria de Aquino
Keyword(s):  
Rio De Janeiro ◽  
Management Practices ◽  
Soil Management ◽  
Mountain Region ◽  
Conservation Strategy ◽  
Ecological Knowledge ◽  
Ecological Processes ◽  
Tillage System ◽  
Current Article ◽  
Janeiro State

Abstract Agriculture in the mountain region of Rio de Janeiro State is characterized by intensive soil use and input. Such mountainous environments are vulnerable to climate events; thus, the current article presents a report on methods applied to exchange academic and traditional knowledge. The aim is to expand farmers’ perception about the need of implementing agro-ecological practices, mainly soil management practices, which are important for agricultural sustainability in mountainous environments. The study was conducted in a Nova Friburgo family production unit, in the mountain region of Rio de Janeiro State (Brazil). It consisted of implementing three observation and soil organic-matter management units. The idea was to reduce the incidence of clubroot of crucifers disease caused by Plasmidiophora brassicae. The soil fauna was discussed with local farmers, with emphasis on the association between ecological processes and soil management. The present study improved the discussion with farmers and the need of introducing other innovative conservation practices such as no-tillage system and participatory research based on agro-ecological propositions.

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