Consulta: creatorFacets:"Loures-Ribeiro,Alan"
Registros recuperados: 6
Data/hora: 09/06/2024 15:45:30

Sensitivity of understorey bird species in two different successional stages of the lowland Atlantic Forest, Brazil
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: Loures-Ribeiro,Alan; Manhães,Marco A.; Dias,Manoel M.
The Atlantic Forest has a high destruction rate and there is little information available on some aspects of the neotropical bird biology. Changes in environment are important factors that affect the resources available to birds. We compared the species sensitivity level of understorey birds in two areas in distinct successional stages (primary and secondary sections). Two 100 ha plots of lowland Atlantic Forest were analysed between August and December 2006. Among 25 bird species recorded, thirteen had lower abundance in secondary forest, two in primary forest, and ten had not clear tendency. According to the criteria used, the percentages for species with low, and medium and high sensitivity to habitat change were 44% and 56%, respectively. The number of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Degradation; Neotropical birds; Point counts; South America; Tropical forest.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000300016

Endocrine cells and nerve ganglia of the small intestine of the Opossum Didelphis aurita Wied-Neuwied, 1826 (Mammalia: Didelphidae)
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: Freitas-Ribeiro,Gláucia M.; Fonseca,Cláudio C.; Sartori,Sirlene S.R.; Loures-Ribeiro,Alan; Neves,Clóvis A.
The nervous and endocrine systems jointly control intestinal movements, secretions of their glands and also participate of the processes of nutrient digestion and absorption. Therefore, the central objective of this study was to verify the existence of a possible relationship between the number of nervous cells and ganglia of the submucosal and myenteric plexuses and the number of endocrine cells in the small intestine of adult D. aurita. The utilized staining techniques were Grimelius, modified Masson-Fontana, direct immunoperoxidase and H-E. Argyrophillic, argentaffin and insulin immunoreactive endocrine cells do not numerically vary between the initial, mid and final regions of the duodenum, jejunum and ileum (P&gt;0.05), except for argyrophillic cells...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Argyrophillic cells; Argentaffin cells; Endocrine cells; Ganglia; Insulin.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000300017

Avifauna da Reserva Biológica Municipal Poço D'Anta, Juiz de Fora, MG
Provedor de dados: Biota Neotropica
Autores: Manhães,Marco Antônio; Loures-Ribeiro,Alan.
A Zona da Mata Mineira está localizada no sudeste do estado de Minas Gerais, nos domínios da Mata Atlântica, e é uma região altamente fragmentada, com muitas manchas pequenas e isoladas, cuja avifauna é pouco estudada. O objetivo deste trabalho foi inventariar a avifauna da Reserva Biológica Municipal Poço D'Anta (277 ha), uma área de floresta do município de Juiz de Fora, sudeste de Minas Gerais, através da caracterização de alguns aspectos ecológicos e o status de conservação. O levantamento foi realizado entre os períodos de março a setembro de 2007, e março de 2008 a maio de 2009, utilizando a lista de Mackinnon, capturas com redes-de-neblina e observações ocasionais. Foram identificadas 156 espécies, das quais 44 (28%) são endêmicas da Mata Atlântica...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Comunidade de aves; Inventário; Mata Atlântica; Sudeste do Brasil.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032011000300023

Analysis of biological parameters of Boophilus microplus Canestrini, 1887 exposed to entomopathogenic nematodes Steinernema carpocapsae Santa Rosa and All strains (Steinernema: Rhabditida)
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Freitas-Ribeiro,Gláucia Marques; Furlong,John; Vasconcelos,Viviane Oliveira; Dolinski,Cláudia; Loures-Ribeiro,Alan.
Engorged and partially engorged females of Boophilus microplus were exposed to 600; 3,000; 6,000 and 30,000 infective juveniles of Steinernema carpocapsae Weiser, 1955 Santa Rosa and All strains per dish, under lab conditions. Eggs weight, pre-laying period, laying period, survival period, reproductive efficiency rate, percentage of larval eclosion and lethal concentrations of 50% and 90% (CL50 and CL90) were calculated for engorged females. In the case of partially engorged females, only egg weight, survival period and CL50 and CL90 were calculated. All biological parameters of engorged or partially engorged females were altered by exposition of S. carpocapsae infective juveniles (IJs), Santa Rosa and All strains (p&lt;0.05). The increase in the response...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Boophilus microplus; Steinernema carpocapsae; Entomopathogenic nematodes; Cattle tick; Reproduction.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000800007

Spatial distribution and diversity of bird community in an urban area of Southeast Brazil
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Manhães,Marco Antônio; Loures-Ribeiro,Alan.
Since the campus of the Federal University of Juiz de Fora, Minas Gerais State, Brazil, has different landscapes, it turns up to be a useful ecological model to evaluate the influence of habitat heterogeneity on bird communities. Our research goals were to know the local avifauna and compare its composition and bird diversity within the different landscapes. Species were identified in point counts without distance estimation, in four habitats: secondary woodlot, lake and surroundings, scrub/abandoned grazing areas and urban areas. One hundred and twenty-one species were identified, but no difference in diversity among the habitats was found. However, analyses indicated the existence of greater similarities among the sampling points belonging to the same...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bird diversity; Southeast Brazil; Habitat heterogeneity; Urban landscapes.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132005000200016

Falconiformes assemblages in a fragmented landscape of the Atlantic Forest in Southern Brazil
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Loures-Ribeiro,Alan; Anjos,Luiz dos.
An ecological analysis focused on distribution of Falconiformes, comprising abundance and morphology data, is provided. Samples were collected in a fragmented landscape within the Atlantic Rainforest, southern Brazil, between August and November 2001. Four main types of habitats were pinpointed among the 30 different sampling sites, while eight external morphological traits were employed. Twenty-one Falconiformes species were detected and jackknife estimates for regional richness reached 24.8 ± 2.56 species (p&lt;0.05). There were no differences between average number of diurnal birds of prey species in the different habitats under analysis (H-test, p&gt;0.05). Mantel's test for relative abundance and species morphology reveals weak association rates,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Birds; Distribution; Falconiformes; Habitat analysis; Richness; Southern Brazil.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000100018