13 research outputs found
Visual communication in Hypsiboas curupi (Anura: Hylidae) at Parque Estadual do Turvo, southern Brazil
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Amphibia, Anura, Hylidae, Hypsiboas curupi Garcia, Faivovich and Haddad, 2007: first record for the state of Rio Grande do Sul, Brazil
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New records of Crossodactylus schmidti Gallardo, 1961 (Anura: Hylodidae) for the state of Rio Grande do Sul, Brazil, with data on morphometry and an updated geographic distribution map
Crossodactylus schmidti Gallardo, 1961 is a diurnal frog inhabiting rocky streams in forested areas, recently considered as a threatened species in the Brazilian states of Rio Grande do Sul and Santa Catarina. Herein we present four new population records of C. schmidti for the northwestern region of Rio Grande do Sul state and discuss the major impacts that may be threatening the species in the state. Additionally, we present an updated map of the current known species distribution and compare morphometric data among populations from Rio Grande do Sul state and Paraná state, in Brazil, and from the province of Misiones, Argentina, based on the examination of voucher specimens available from herpetological collections
Levantamento molecular de micoplasma hemotrópico em mão-pelada (Procyon cancrivorus) do sul do Brasil
Hemoplasmas are non-cultivable bacterial parasites of erythrocytes that infect domestic and wild animals, as well as humans. Their means of transmission and pathogenesis remain contentious issues and difficult to evaluate in wild animals. Procyon cancrivorus is a South American carnivore and occurs in all Brazilian biomes. In this study, we aimed to investigate occurrences of hemoplasmas infecting P. cancrivorus and to identify their 16S rRNA gene, in southern Brazil. DNA was extracted from spleen and blood samples of P. cancrivorus (n = 9) from different locations. Hemoplasma DNA was detected in six samples, based on 16S rRNA gene amplification and phylogenetic analysis. Four of the six sequences belonged to the “Mycoplasma haemofelis group”, which is closely related to genotypes detected in Procyon lotor from the USA; one was within the “Mycoplasma suis group”, closely related to “Candidatus Mycoplasma haemominutum”; and one was within the intermediate group between these clusters. Thus, these sequences showed that the molecular identity of hemoplasmas in the population studied was very variable. In five positive animals, Amblyomma aureolatum ticks and a flea (Ctenocephalides felis felis) were collected. The present study describes the first molecular detection of mycoplasmas in P. cancrivorus.Os micoplasmas hemotrópicos (hemoplasmas) são parasitas bacterianos não-cultiváveis de eritrócitos que infectam tanto animais domésticos e selvagens, como seres humanos. A transmissão e a patogênese são discutíveis e difíceis de avaliar em animais selvagens. O mão pelada (Procyon cancrivorus) é um carnívoro Sul-americano, que ocorre em todos os biomas brasileiros. O objetivo do presente estudo é o de investigar a ocorrência de hemoplasmas infectando P. cancrivorus e identificar seu gene 16S rRNA no Sul do Brasil. O DNA foi extraído do baço e amostras de sangue de P. cancrivorus (n= 9). O DNA de hemoplasma foi detectado em seis amostras, com base na amplificação do gene 16S rRNA e na análise filogenética. Quatro das seis sequências pertencem ao “Grupo Mycoplasma haemofelis”, que estão intimamente relacionadas aos genótipos detectados no Procyon lotor dos EUA; uma dentro do “Grupo Mycoplasma suis”, que está intimamente relacionado ao “Candidatus Mycoplasma haemominutum”, e uma dentro do grupo intermediário entre esses clusters, mostrando assim que há uma diversidade genética de hemoplasmas na população estudada. Em cinco animais positivos, foram coletados carrapatos Amblyomma aureolatum e uma pulga Ctenocephalides felis. O presente estudo traz a primeira detecção molecular de micoplasmas em P. cancrivorus
Degree of technification of the sheep herd may be associated with seropositivity for the maedi-visna virus In South Brasil
Maedi-Visna (MV) is a chronic progressive multisystem disease that may be asymptomatic for several months or years, but progress rapidly, and may result in death, when signs and symptoms evolve. Viral elimination occurs mainly through direct contact with positive animal secretions. There is no vaccine or treatment, and prophylaxis is necessary for the health of the herd. The present study aimed to verify the seropositivity of MV and evaluate the factors associated with the risk in sheep herds in Paraná. A total of 1549 serum samples were collected from 90 properties. An epidemiological questionnaire was applied to each property, and the variables were analyzed using the Epi-info program and R environment. Of the 1549 samples analyzed, 22 were positive (1.4%) for the micro-AGID test in 13.3% of the properties. Our study demonstrated variables associated with the prevention and the risk of seropositivity to MVV. Conducting a breeding season, supplying concentrated feed, and separating the breeding stock before birth were factors associated with protection, whereas the previous occurrence of problems with lice, breeding on pasture, and keeping cats close to the flock were factors associated with risk. The seropositivity observed in the present study suggests the circulation of MVV in sheep herds in Paraná, which reinforces the need to implement prevention and control measures since the level of technification may be associated with the occurrence of anti-MVV antibodies in herds
Reptilia, Serpentes, Dipsadidae, Gomesophis brasiliensis (Gomes, 1918): distribution extension in state of Santa Catarina, Brazil
The Brazilian burrowing snake, Gomesophis brasiliensis, occurs in aquatic habitats such as swamps, from Minas Gerais and Distrito Federal until Rio Grande do Sul. In spite of this wide distribution, the species’ geographic range still remains unclear. This note reports the occurrence of G. brasiliensis in the municipality of Vargem Bonita, state of Santa Catarina, south Brazil, extending the species’ range ca. 80 km to the west in this state
Erratum to: Social interactions in a neotropical stream frog reveal a complex repertoire of visual signals and the use of multimodal communication (Behaviour 151 (2014) 719–739, DOI:)
Amphibia, Anura, Hylidae, Hypsiboas curupi Garcia, Faivovich and Haddad, 2007: first record for the state of Rio Grande do Sul, Brazil
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Amphibia, Anura, Hylidae, Hypsiboas curupi Garcia, Faivovich and Haddad, 2007: first record for the state of Rio Grande do Sul, Brazil
Non
Diversidade de formigas (Hymenoptera, Formicidae) do perímetro urbano do município de Chapecó, Santa Catarina, Brasil
Estudos sobre a ocorrência de formigas em ambientes urbanos são escassos em Santa Catarina e só começaram a ser realizados na última década no oeste do Estado. Objetivando conhecer a mirmecofauna urbana do município de Chapecó, Santa Catarina, o perímetro urbano foi dividido em oito áreas onde foram realizadas coletas mensais durante o período de março de 2006 a fevereiro de 2007, em áreas externas de residências e comércios, utilizando-se iscas a base de sardinha e coletas manuais. Do total de registros obtidos para cada espécie caracterizou-se a mirmecofauna através dos índices de diversidade (Shannon-Wiener - H’) e riqueza estimada (Chao 2). Foram identificadas 66 espécies, distribuídas em 29 gêneros, 14 tribos e sete subfamílias: Myrmicinae (31), Formicinae (14), Dolichoderinae, Ponerinae (6), Pseudomyrmecinae (5), Ectatomminae (3) e Ecitoninae (1). O índice geral de diversidade de Shannon-Wiener encontrado foi de 3,89; um valor significante quando comparado a valores obtidos em outros estudos da região. Constatou-se a presença de espécies frequentemente associadas à microorganismos patogênicos, bem como a presença de formigas especialistas de hábitat. Os resultados mostram que a diversidade de formigas do município de Chapecó é alta quando comparada à diversidade conhecida para a região, e que a conservação dos remanescentes e fragmentos de vegetação é fundamental para a manutenção dessa diversidade