Host-ectoparasite specificity in a small mammal community in an area of Atlantic Rain Forest (Ilha Grande, State of Rio de Janeiro), Southeastern Brazil

Bittencourt, Emerson Brum; Rocha, Carlos Frederico Duarte

doi:10.1590/s0074-02762003000600015

Cited by 28 publications

(16 citation statements)

References 26 publications

(29 reference statements)

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“…In South America, particularly in Argentina, many Amblyomma ticks (e.g., A. parvum, A. tigrinum, A. triste) were found in aggregated distribution on rodent hosts (Nava et al 2006(Nava et al , 2009(Nava et al , 2011. In Brazil, tick aggregation has not been commonly measured in studies of tick-small mammal relationship (Barros-Battesti et al 2000;Bittencourt and Rocha 2003;Bossi et al 2002). But, as both prevalence and the mean number of ticks per host, in overall, correlate negatively with aggregation (Poulin 2007), the low prevalence of infestation of ticks observed in that studies may indicate that this phenomenon is more widespread on small mammal hosts.…”

Section: Resultsmentioning

confidence: 99%

Ecological implications on the aggregation of Amblyomma fuscum (Acari: Ixodidae) on Thrichomys laurentius (Rodentia: Echimyidae), in northeastern Brazil

et al. 2012

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We investigated the Amblyomma fuscum load on a pullulating wild rodent population and the environmental and biological factors influencing the tick load on the hosts. One hundred and three individuals of Thrichomys laurentius were caught in an Atlantic forest fragment in northeastern Brazil, as part of a longitudinal survey on ticks infesting non-volant small mammals. Ticks (n = 342) were found on 45 individuals and the overall mean intensity of infestation was 7.6 ticks per infested rodent. Ticks were highly aggregated in the host population and the negative binomial distribution model provides a statistically satisfactory fit. The aggregated distribution was influenced by sex and age of the host. The microhabitat preference by T. laurentius probably increases contact opportunities between hosts and aggregated infesting stages of the ticks and represents important clues about the habitat suitability for A. fuscum.

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Section: Resultsmentioning

confidence: 99%

Ecological implications on the aggregation of Amblyomma fuscum (Acari: Ixodidae) on Thrichomys laurentius (Rodentia: Echimyidae), in northeastern Brazil

et al. 2012

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“…Even if ticks infesting mammals in Brazil have long been studied (Barros-Battesti et al 1998Bittencourt and Rocha, 2003;Martins et al 2009), data on habitat fragmentation and its effects on tick-host-pathogen associations in the Atlantic Forest are meagre. We hypothesized that the Atlantic Forest provides an environment for small mammal communities and ticks, and that small mammals are constantly exposed to pathogens, such as Rickettsia spp.…”

Section: Introductionmentioning

confidence: 99%

Exposure of small mammals to ticks and rickettsiae in Atlantic Forest patches in the metropolitan area of Recife, North-eastern Brazil

et al. 2012

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small mammals were captured in 6 Atlantic Forest patches in Brazil. We assessed tick-host associations and whether they differ among forest strata, sites, seasons, and host age classes or between sexes. Moreover, we assessed the exposure of animals to Rickettsia spp. In total, 432 animals were captured and 808 ticks were found on 32·9% of them. Significant differences were found among host species, collection sites, and forest strata; microhabitat preference was a strong risk factor for tick infestation. The highest tick density rates were recorded in forest fragments settled in rural areas; 91·3% of the ticks were collected from animals trapped in these forest fragments. A high prevalence (68·8%) of antibodies to Rickettsia spp. was detected among animals. This study suggests that disturbed Atlantic Forest fragments provide an environment for ticks and small mammals, which are highly exposed to rickettsiae. It also indicates that forest patches settled in rural areas are usually associated with higher small mammal diversity as well as with higher tick density rates.

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“…sem espécies identificadas Bittencourt & Rocha (2003) Subordem Metastigmata Família Ixodidae sem espécies identificadas Guitton et al (1986) Amblyomma sp.…”

Section: Família Macronyssidaeunclassified

“…Jar, VDR Storni, (2000; Alves (2001); Storni et al(2005); Rocha et al (2008Rocha et al ( , 2009 Ixodes amaralli Fonseca, 1935PVE Guitton et al (1986 Ixodes didelphidis Fonseca & Aragão, 1952 Jar, Cax, VDR Bittencourt & Rocha (2003); Rocha et al (2008Rocha et al ( , 2009 Ixodes loricatus Neumann, 1899 PVE Guitton et al (1986) Ixodes sp. Jar, Cax, VDR Bittencourt & Rocha (2002 …”

Section: Pvementioning

confidence: 99%

Estado Do Conhecimento Da Fauna De Invertebrados Não-Marinhos Da Ilha Grande (Angra Dos Reis, Rj)

et al. 2010

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RESUMOA Ilha Grande, situada ao sul do Estado do Rio de Janeiro, possui importantes remanescentes de Floresta Atlântica. Entretanto, o conhecimento sobre sua fauna de invertebrados não-marinhos ainda é restrito, tanto em abrangência de grupos taxonômicos como em áreas geográficas. Devido à importância de inventários de biodiversidade para a conservação e tendo em vista a falta de informação organizada sobre os registros disponíveis, elaboramos uma lista dos táxons citados e suas respectivas localidades, utilizando dados primários de projetos em andamento e as fontes bibliográficas disponíveis. O resultado consiste em uma lista com 465 táxons de invertebrados não-marinhos, a grande maioria do Filo Arthropoda (72,9%) seguido do filo Mollusca (22,15%). Dos táxons citados 27,2% estão na categoria específica e 60% na categoria gênero. A análise dos dados mostrou que houve um incremento de informação a partir de 1999, e que essa informação está concentrada no entorno da Vila Dois Rios. Os resultados apresentados demonstram a necessidade de realização de inventários de fauna, com ampliação dos grupos taxonômicos e das áreas estudadas, no sentido de completar as imensas lacunas detectadas. Palavras-chave: Banco de dados; diversidade; Floresta Atlântica; lista faunística; Rio de Janeiro. ABSTRACT CURRENT KNOWLEDGE OF THE NON-MARINE INVERTEBRATES FAUNA OF ILHA GRANDE (ANGRA DOS REIS, RJ). Ilha Grande, a continental island located at Southern of Rio deJaneiro state, has important remnants of Atlantic Rainforest. However, the knowledge of the non-marine invertebrate fauna is not sufficiently well known, concerning not only taxonomic groups but also geographic areas. Considering the relevance of biodiversity inventories to conservation, allied to the absence of organized information about the existing data, we prepared a taxonomic list of the non-marine invertebrates reported to Ilha Grande, including distributional data, based on primary data of ongoing research projects and literature. The list is composed of 465 taxa of non-marine invertebrates, mainly Arthropoda (72.9%), followed by Mollusca (22.15%). Among cited taxa 25.52% are in the species category and 60% are in the genus category. The data analysis revealed an information increase since 1999 and that this information are concentrated at Vila Dois Rios region. Results show the need for improving Ilha Grande faunistic inventories, focusing taxonomic groups and areas, in order to fill the huge existing gaps.

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Host-ectoparasite specificity in a small mammal community in an area of Atlantic Rain Forest (Ilha Grande, State of Rio de Janeiro), Southeastern Brazil

Cited by 28 publications

References 26 publications

Ecological implications on the aggregation of Amblyomma fuscum (Acari: Ixodidae) on Thrichomys laurentius (Rodentia: Echimyidae), in northeastern Brazil

Ecological implications on the aggregation of Amblyomma fuscum (Acari: Ixodidae) on Thrichomys laurentius (Rodentia: Echimyidae), in northeastern Brazil

Exposure of small mammals to ticks and rickettsiae in Atlantic Forest patches in the metropolitan area of Recife, North-eastern Brazil

Estado Do Conhecimento Da Fauna De Invertebrados Não-Marinhos Da Ilha Grande (Angra Dos Reis, Rj)

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