Rhipicephalus sanguineus sensu lato(Ixodidae) in synantropic rodents in Rio Grande do Sul, Brazil

Rhipicephalus sanguineus, the brown dog tick, is responsible for maintaining and transmitting various pathogens, both in animals and human beings, and it is of great sanitary importance. This communication reports the first occurrence of Rhipicephalus sanguineus sensu lato parasitizing Rattus norvegicus in the state of Rio Grande do Sul, Brazil, and it is also the first record of this tick species parasitizing Rattus rattus in Brazil. The rodents were captured from the port area, located in the city of Pelotas, Rio Grande do Sul, Brazil. We collected 6 larvae of this tick species from 2 male R. rattus individuals, and 3 larvae from 2 female R. norvegicus individuals; parasitized specimens of both rodent species were captured from different sites within the experimental area. This record broadens the number of Rhipicephalus sanguineus sensu lato hosts in urban areas, indicating the need for continued monitoring on population density for both R. sanguineus and synanthropic rodents.

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Ixodidae fauna of domestic dogs in Parana, southern Brazil

Revista Brasileira de Parasitologia Veterinária ◽

10.1590/s1984-29612017021 ◽

2017 ◽

Vol 26 (3) ◽

pp. 375-377 ◽

Cited By ~ 2

Author(s):

Bianca Ressetti da Silva ◽

Marcos Valério Garcia ◽

Vinicius da Silva Rodrigues ◽

Renato Andreotti ◽

Rosangela Locatelli Dittrich

Keyword(s):

Urban Areas ◽

Tick Species ◽

Rhipicephalus Sanguineus ◽

Domestic Dogs ◽

Southern Brazil ◽

Rural And Urban Areas ◽

Amblyomma Ovale ◽

Rural And Urban ◽

Rhipicephalus Sanguineus Sensu Lato

Abstract The present study aimed to contribute towards identification and registration of tick species that parasitize dogs in rural and urban areas of three mesoregions of Paraná, southern Brazil, and to estimate the rate of occurrence of each species. Fifty-six dogs with ticks living in three mesoregions: Metropolitana de Curitiba (MC), Centro Oriental (COP) and Centro Sul Paranaense (CSP), were used in the study. From these 56 dogs, 253 ticks were collected and were identified and morphologically characterized according to the species. Among all the ticks, 69.6% were identified as belonging to the species Rhipicephalus sanguineus sensu lato (s. l.); 28.1% as Amblyomma aureolatum and 2.4% as Amblyomma ovale. Among the dogs in MC that were evaluated, 57.7% were parasitized by R. sanguineus s. l., 38.5% by A. aureolatum and 3.8% by A. ovale; while in COP, 72.4% of the dogs were parasitized by A. aureolatum and 27.6% by R. sanguineus s. l.. In CSP, one tick was obtained, which was identified as A. aureolatum.

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Herpetofauna from an urban Pampa fragment in southern Brazil: composition, structure and conservation

Check List ◽

10.15560/12.5.1964 ◽

2016 ◽

Vol 12 (5) ◽

pp. 1964

Author(s):

Omar Machado Entiauspe-Neto ◽

Tângela Denise Perleberg ◽

Marco Antonio de Freitas

Keyword(s):

Natural History ◽

Urban Areas ◽

Rio Grande ◽

Southern Brazil ◽

Rio Grande Do Sul ◽

Faunal Composition ◽

Diversity Patterns ◽

Reptile Species ◽

History Of ◽

Composition Structure

Faunistic inventories regarding natural history of amphibians and reptiles are considered scarce and very little is known about their assemblages in urban areas; the Pampas morphoclimatic domain, also known as Uruguayan Savannah or Southern Grasslands, is also poorly known regarding their faunal composition. Herein, we present a checklist of 16 amphibian and 20 reptile species recorded over a course of four years in the Instituto Federal de Educação, Ciências e Tecnologia, Câmpus Pelotas-Visconde da Graça, in Pelotas, Rio Grande do Sul, Brazil. We also present data on natural history and discuss conservation efforts to be undertaken in the area, in one of the least preserved and known Brazilian morphoclimatic domains, providing insights into urban herpetofaunal diversity patterns and showing the importance of modified areas in its conservation.

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First record of species of Liogenys (Coleoptera, Melolonthidae) associated with winter grain crops in Rio Grande do Sul (Brazil)

Revista Brasileira de Entomologia ◽

10.1590/s0085-56262011005000052 ◽

2011 ◽

Vol 55 (4) ◽

pp. 618-620 ◽

Cited By ~ 6

Author(s):

Mariana A. Cherman ◽

Jerson V. C. Guedes ◽

Miguel A. Morón ◽

Elder Dal Prá ◽

Clérison R. Perini ◽

...

Keyword(s):

Rio Grande ◽

First Record ◽

Rio Grande Do Sul ◽

Grain Crops

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Growth curve of Atlantoscia floridana (van Name) (Crustacea, Isopoda, Philosciidae) from a Brazilian Restinga Forest

Revista Brasileira de Zoologia ◽

10.1590/s0101-81752004000100001 ◽

2004 ◽

Vol 21 (1) ◽

pp. 1-8 ◽

Cited By ~ 12

Author(s):

Paula Beatriz Araujo ◽

Georgina Bond-Buckup

Keyword(s):

Growth Rate ◽

Growth Curve ◽

Urban Areas ◽

Field Data ◽

Growth Curves ◽

Rio Grande ◽

Rio Grande Do Sul ◽

Differential Growth ◽

Estimate Life Expectancy ◽

Males And Females

The terrestrial isopod Atlantoscia floridana (van Name, 1940) occurs from the U.S.A. (Florida) to Brazil and Argentina. In the southernmost Brazilian State, Rio Grande do Sul, the species is recorded in many localities, in urban and in non-urban areas. The growth curve of Atlantoscia floridana based on field data is presented. The specimens were sampled from April, 2000 to October, 2001 at the Reserva Biológica do Lami (RBL), Rio Grande do Sul. Captured individuals were sexed and had their cephalothorax width measured, with the data analyzed with von Bertalanffy's model. The growth curves for males and females are described, respectively, by the equations: Wt = 1.303 [1 - e-0.00941 (t + 50.37)] and Wt = 1.682 [1 - e-0.00575 (t + 59.13)]. The curves showed differential growth between sexes, where females reach a higher Wµ with a slower growth rate. Based on the growth curves it was also possible to estimate life expectancy for males and females.

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Mollusca, Bivalvia, Cuspidariidae, Plectodon braziliensis (E. A. Smith, 1915) n. comb.: record of the genus for the South Atlantic, off Brazil

Check List ◽

10.15560/6.4.648 ◽

2010 ◽

Vol 6 (4) ◽

pp. 648 ◽

Cited By ~ 1

Author(s):

Daniel M. Pimpão ◽

Inga L. Veitenheimer-Mendes ◽

Fabrizio Scarabino

Keyword(s):

Type Species ◽

Rio Grande ◽

First Record ◽

South Atlantic ◽

New Combination ◽

Rio Grande Do Sul ◽

The South ◽

Scientific Collections

An analysis of bivalves shells collected off the coast of Rio Grande, Rio Grande do Sul, Brazil and specimens of scientific collections, identified as Cuspidaria braziliensis E. A. Smith, 1915 was made. From the examination of syntypes of C. braziliensis and the type species of the genus Plectodon Carpenter, 1864, a redescription was made and it is proposed to transfer the species to the genus Plectodon, resulting in the new combination Plectodon braziliensis (E.A. Smith, 1915). This is the first record of a Plectodon species for the South Atlantic.

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CHEMICAL CHARACTERIZATION OF ATMOSPHERIC PARTICLES IN URBAN AREAS OF RIO GRANDE DO SUL, BRAZIL-PRELIMINARY STUDY

Southern Brazilian Journal of Chemistry - Southern Brazilian Journal of Chemistry, Volume 28, No. 28, 2020 ◽

10.48141/sbjchem.v14.n14.2006.3_2006.pdf ◽

2006 ◽

Vol 14 (14) ◽

pp. 1-16

Author(s):

E. Teixeira ◽

J. Fachel Braga ◽

J.D. D. Migliavacca ◽

M.L.L.Fomoso Sanchez

Keyword(s):

Chemical Composition ◽

Urban Areas ◽

Chemical Characterization ◽

Rio Grande ◽

Atmospheric Particles ◽

Rio Grande Do Sul ◽

Power Stations ◽

Cluster Data ◽

Steel Industries

This work reports the determination of the concentration and chemical composition of atmospheric particles in the urban districts of Charqueadas and Sapucaia do Sul, State of Rio Grande do Sul, Brazil. Chemical composition, morphology, and particle size were analyzed using a scanning electron microscope with energy dispersive x=ray microanalysis (SEM-EDS). Cluster analysis showed that there were six types of particles: Fe-Zn, Fe, Si=Al, Si, Ca-S, and Na. Factorial analysis from cluster data showed that particles rich in Fe-Zn, Si-Al, and Ca-S appeared more frequently, indicating anthropogenic influence (vehicles, steel plants, coal-fired power stations). The experimental results and consideration of the wind directions show that the main source of pollution in Charqueadas appears to be due to coal mining and steel industries, while in Sapucaia do Sul due to steel plants and vehicles.

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Bovine rabies in Rio Grande do Sul: positivity rates, geographical distribution, and seasonal occurrence

Acta Veterinaria Brasilica ◽

10.21708/avb.2021.15.4.10072 ◽

2021 ◽

Vol 15 (4) ◽

pp. 267-274

Author(s):

Bruno Egídio Cappelari ◽

Jéssica Grace da Silveira ◽

Julio César de Almeida Rosa ◽

José Carlos Ferreira ◽

Giovana Dantas

Keyword(s):

Retrospective Study ◽

Geographical Distribution ◽

Urban Areas ◽

Viral Encephalitis ◽

Rio Grande ◽

Laboratory Diagnosis ◽

Seasonal Occurrence ◽

Human Rabies ◽

Rio Grande Do Sul ◽

The Impact

Rabies is a zoonotic disease characterized by acute viral encephalitis. It is almost 100% fatal for infected animals. While cases of human rabies have still been registered in Brazil, in the state of Rio Grande do Sul rabies is considered a controlled disease in urban areas. However, the transmission of bovine rabies – which has been largely associated with the Desmodus rotundus bat – is endemic. Additionally, there are estimates that only 10% of rabies cases are reported. Therefore, this study aimed to describe the positivity rates, geographical distribution, and seasonal occurrence of bovine rabies in RS, as well as the sampling practices in rabies surveillance. Using samples submitted for laboratory diagnosis from 2016 to 2019, we conducted a retrospective study of the sample results, positivity rates, and seasonal occurrence of rabies in cattle. Throughout these four years, less than a third of state municipalities sent samples for diagnosis, suggesting that the occurrence of rabies might still be underestimated in non-sampled areas. A higher number of rabies cases were reported in 2019, a year in which the most diagnosed samples and the highest positivity percentages were recorded. However, the case numbers registered between 2016 and 2019 were not significantly different. We found that the summer and autumn months presented statistically different positivity rates. Besides this, we did not find any positive D. rotundus samples, despite the positivity rates for bovine rabies. Active surveillance, especially of bat populations and under-sampled regions, must be strengthened to correctly estimate the impact of rabies.

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Earthworm diversity in Rio Grande do Sul, Brazil

Zootaxa ◽

10.11646/zootaxa.4496.1.43 ◽

2018 ◽

Vol 4496 (1) ◽

pp. 562 ◽

Cited By ~ 2

Author(s):

GERUSA PAULI KIST STEFFEN ◽

RICARDO BEMFICA STEFFEN ◽

MARIE LUISE CAROLINA BARTZ ◽

SAMUEL WOOSTER JAMES ◽

RODRIGO JOSEMAR SEMINOTTI JACQUES ◽

...

Keyword(s):

Species Richness ◽

Native Species ◽

Rio Grande ◽

First Record ◽

Diversity Indices ◽

Morphological Characters ◽

Rio Grande Do Sul ◽

Earthworm Species ◽

Aporrectodea Trapezoides ◽

Native Pastures

The knowledge regarding earthworm species richness in subtropical Brazil is limited, particularly in the state of Rio Grande do Sul (RS), where only a few sites have been sampled. In this study we assessed earthworm richness in different ecosystems of RS, prioritizing un-sampled regions. Fifteen ecosystems, including native vegetation and other ecosystems with variable levels of disturbance were sampled in 30 counties in RS, totaling 77 sampling points, mainly in the Pampa biome. Qualitative sampling was performed by handsorting soil monoliths and fixing the earthworms in 4% formalin solution. Species identification was based on morphological characters, and species richness and Shannon (H) and McIntosh (U) diversity indices were calculated for each ecosystem. Twenty-one earthworm species were identified, belonging to seven families: Glossoscolecidae (8), Rhinodrilidae (2), Ocnerodrilidae (4), Megascolecidae (4), Acanthodrilidae (1), Lumbricidae (1) and Criodrilidae (1). From these, ten are new species belonging to the genera: Glossoscolex (6), Fimoscolex (1), Kerriona (1), Eukerria (1), and one aquatic species of the Criodrilidae family, belonging to a new genus. Most of the native species (Urobenus brasiliensis, Fimoscolex n.sp.1 and the Glossoscolex spp.) predominated in ecosystems little altered by human activity, while exotic (Amynthas gracilis, Amynthas rodericensis, Metaphire californica, Aporrectodea trapezoides) and peregrine species (Pontoscolex corethrurus) predominated in areas with more human disturbance. Native ecosystems with lower disturbance, particularly forests and native pastures had higher diversity than disturbed sites. This is the first record of A. rodericencis for Brazil and most sites represent new collection records for the known species in RS.

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Reptilia, Squamata, Leiosauridae, Urostrophus vautieri Duméril and Bribon, 1837: distribution extension, new state record, and geographic distribution map

Check List ◽

10.15560/6.3.432 ◽

2010 ◽

Vol 6 (3) ◽

pp. 432

Author(s):

João Luiz Gasparini ◽

Diogo Andrade Koski ◽

Pedro L.V. Peloso

Keyword(s):

Geographic Distribution ◽

Rio De Janeiro ◽

Rio Grande ◽

First Record ◽

Minas Gerais ◽

The State ◽

Rio Grande Do Sul ◽

Distribution Map ◽

Santa Catarina ◽

The North

We present the first record of Urostrophus vautieri for the state of Espírito Santo and a distribution map for the species. This species was previoulsy known from the states of Minas Gerais, Rio de Janeiro, São Paulo, Paraná, Santa Catarina, and Rio Grande do Sul. The present record represent an extension of nearly 200 km to the North from the nearest published record for the species.

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New species of Temnocephala (Platyhelminthes, Temnocephalida) ectosymbiont on vulnerable species of aeglids (Crustacea, Anomura) from the Neotropical Region

Biota Neotropica ◽

10.1590/1676-0611-bn-2017-0475 ◽

2018 ◽

Vol 18 (4) ◽

Cited By ~ 3

Author(s):

Samantha Alves Seixas ◽

Norton Dametto ◽

Eduardo Périco

Keyword(s):

New Species ◽

Reproductive System ◽

Rio Grande ◽

First Record ◽

Neotropical Region ◽

Vulnerable Species ◽

Rio Grande Do Sul ◽

Anterior Portion ◽

Vaginal Sphincter ◽

A New Species

Abstract: A new species of the genus Temnocephala Blanchard, 1849 from southern Brazil was found on two species of anomuran crustaceans, Aegla spinipalma Bond-Buckup & Buckup, 1994 and Aegla grisella Bond-Buckup & Buckup, 1994, the latter classified as a vulnerable species by the "Lista de Referência da Fauna Ameaçada de Extinção no Rio Grande do Sul. Decreto no 41.672, de 11 junho de 2002". The crustaceans were collected from a tributary creek of the Forqueta river, Perau de Janeiro, Arvorezinha and a tributary creek of the Fão river, Pouso Novo, Rio Grande do Sul, Brazil; both localities belong to the Sub-Basin of Forqueta River. The new species differs from seven other temnocephalans epibionts on Aegla Leach, 1820, by having the following characters: 1. a long and slightly curved cirrus, 2. two vaginal sphincters, one proximal, big and asymmetric, and one distal, smaller and symmetric, and; 3. longer than wide, elongated epidermal 'excretory' syncytial plates (EPs), with a almost horizontally central excretory pore, displaced to the anterior portion of the plate. The new species' EP is the largest in total length among epibionts temnocephalans in crustaceans already registered. Regarding the similarities with the male reproductive system of Temnocephala axenosMonticelli, 1898, the new species has important differences in the female reproductive system. It has a larger proximal vaginal sphincter, located in the middle of the vagina, while the smaller distal one is at the extreme end of the organ. Besides that, the vaginal portion between the proximal and distal sphincters is conspicuous, with a strong muscular wall. This is the first record of a species of Temnocephala in the Taquari Valley, as well in the 'Perau de Janeiro', which is an area with a rich endemic fauna.

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