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Esberard C.E.L.,Federal Rural University of Rio de Janeiro | Astua D.,Federal University of Pernambuco | Geise L.,State University of Rio de Janeiro | Costa L.M.,Federal Rural University of Rio de Janeiro | And 2 more authors.
Brazilian Journal of Biology | Year: 2012

Ecological aspects related to parasitism are one of the less studied issues in parasitology research, and the scarce evidence available supports that younger specimens present higher infestation rates. The purpose of this work is to establish if higher infestation rates are observed in nursing females and their young captured inside their roost. Bats were captured inside a shelter located in RPPN Estação Veracel, Santa Cruz de Cabrália, Bahia state, Brazil. A total of 56 individuals of Carollia perspicillata were observed, 17 captured inside the roost during the day and 39 in trails at night. Captures of C. perspicillata during the day in a shelter yielded similar infestation rates to bats netted in trails and higher prevalence. The hypothesis that young were more infected was confirmed, based on the higher infestation of nursing females with neonates and on the significant inverse relation between body weight and number of parasites in young and subadults.

De Andrade Costa B.M.,Federal University of Espirito Santo | Geise L.,State University of Rio de Janeiro | Pereira L.G.,Habtec Engineering Sanitaria e Ambiental Ltda. | Costa L.P.,Federal University of Espirito Santo
Journal of Mammalogy | Year: 2011

The genus Rhipidomys (sigmodontine rodents in the tribe Thomasomyini) is a poorly known radiation of Neotropical mice with few studies addressing their systematics and geographic distribution. We describe 2 new species of Rhipidomys (climbing mice) from southeastern Brazil. One of these species is known only from the type locality and 2 additional sites in the southeastern part of Minas Gerais, north of the Serra da Mantiqueira mountain complex. The other species occurs to the south of this mountain range in eastern Rio de Janeiro and So Paulo states, including coastal islands. These species can be distinguished from each other and from their congeners by morphological and molecular traits, and the new species from south of the Serra da Mantiqueira has a unique chromosomal complement of 2n = 44 and FN = 48, 49, or 50. Phylogenetic analysis of cytochrome-b sequences also revealed an additional unnamed clade of Rhipidomys from central and eastern Brazil, which is closely related to R. cariri from northeastern Brazil. A formal description of this clade requires additional morphological analyses, including specimens from the Guianas and other central Brazilian localities. In addition, the Amazonian species R. macconnelli and R. wetzeli appear as highly divergent from all other species included in the analysis. Finally, intraspecific morphological variation in species from mesic enclaves (brejos) in northeastern Brazil indicates the need for further taxonomic revision of R. mastacalis, R. macrurus, R. cariri, and Rhipidomys sp. © 2011 American Society of Mammalogists.

De Oliveira Moura A.L.,Habtec Engineering Sanitaria e Ambiental Ltda | Morim M.P.,Institute Pesquisas Jardim Botanico Do Rio Of Janeiro
Rodriguesia | Year: 2015

The present study had the goal of carrying out a floristic inventory and taxonomic treatment of Convolvulaceae in three Dense Ombrophilous Forest remnants in the State of Rio de Janeiro: Itatiaia National Park (Parque Nacional do Itatiaia-PNI), Serra dos Órgãos National Park (Parque Nacional da Serra dos Órgãos-Parnaso), Poço das Antas Biological Reserve (Reserva Biológica de Poço das Antas-Rebio). Herbaria were consulted, scientific expeditions to the study area were carried out and the taxonomy of collected species was identified. The results were able to cover the identification of species, diagnoses, commentary, illustrations, and habitat. The survey found five genera, 33 species and one variety. Five species are endemic to the Brazilian Atlantic Rainforest. The number and types of stigma, leaf lamina, fruit and indumentum were the main characteristics identified for the studied taxa. Among the studied species, 90% are herbaceous and 31 (86%) have a voluble habit, the majority resulting in individuals with a low circumference (1-10 cm). The greatest variety of species was observed for Parnaso (23), followed by PNI (15) and finally by Rebio (11). The montane Forest showed greater formation of taxa, with the occurrence of 12 species.

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