SIMULAÇÃO DE DESBASTE EM POVOAMENTO DE Hovenia dulcis MEDIANTE DENDROGRAMA DE MANEJO DE DENSIDADE

Este trabalho foi desenvolvido com o objetivo de estudar a densidade e simular intervenções, por meio de dendrogramas de manejo de densidade, em uma população de Hovenia dulcis localizada na região central do estado do Rio Grande do Sul. Para tanto, foram utilizados dados de diâmetro de copa e de fuste, coletados em três estratos: dominante, intermediário e dominado, pelo método da Densidade Pontual de Spurr, num povoamento de aproximadamente 1,3 hectares de uva do Japão com 25 anos de idade. Devido o local de coleta das informações apresentar grande variação na altura dominante, este foi dividido em Sítios I e II. Entre os estratos verificou-se que somente ocorreu diferença estatística significativa entre o estrato dominante do Sítio I e os demais de ambos os sítios. O coeficiente angular do ajuste das linhas de densidade ficaram estabelecidos, para o estrato dominante do Sítio I em -2,492 e, para os demais, em -1,085. A melhor forma de conduzir o povoamento seria aplicando um desbaste, se o mesmo fosse formado somente por árvores com dimensões semelhantes às do estrato dominante do Sítio I, e quatro intervenções se fosse constituído somente de indivíduos pertencentes aos demais estratos.Palavras-chave: Sítio; modelo de Reineke; desbaste. AbstractThinning simulation in Hovenia dulcis population trough density management dendrogram. The main objective of this study was to simulate density and interventions through density management dendrogram in a population of Hovenia dulcis located in the central region of the State of Rio Grande do Sul, Brazil. It was utilized Data from crown and stem diameters, collected in three types of tree stratum dominant, intermediate, and dominant, through the Punctual Density Method developed by Spurr, in a stand of approximately 1.3 hectares of Hovenia dulcis 25 years old were used. Due to the high variability in the trees dominant height the area was divided into two sites, I and II. The results showed that statistic significant difference was detected only between the dominant stratum of site I, and the other strata on both sites. The angular coefficients of the regression adjustment of the density lines were -2.492 for the site I dominant stratum and -1.085 for the others. It was also observed that the best way to manage the stand would be one thinning, if it was formed only by trees with similar dimensions of the dominant stratum of Site I, and four thinnings if the site was composed by individuals belonging to the other strata.Keywords: Site; Reineke model; thinning.

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Balantidium coli in Pigs of Distinct Animal Husbandry Categories and Different Hygienic-Sanitary Standards in the Central Region of Rio Grande do Sul State, Brazil

Acta Scientiae Veterinariae ◽

10.22456/1679-9216.80041 ◽

2017 ◽

Vol 45 (1) ◽

pp. 6 ◽

Cited By ~ 2

Author(s):

Luís Antonio Sangioni ◽

Sônia De Avila Botton ◽

Fernanda Ramos ◽

Gustavo Cauduro Cadore ◽

Silvia Gonzales Monteiro ◽

...

Keyword(s):

Central Region ◽

Intestinal Parasites ◽

Physiological State ◽

Rio Grande ◽

Rio Grande Do Sul ◽

Natural Reservoir ◽

Swine Farms ◽

Balantidium Coli ◽

Significant Difference ◽

Stool Samples

Background: Balantidium coli is a commensal protozoan that infects several animals, but it has pigs as its natural reservoir. In the presence of predisposing factors, B. coli can become pathogenic for swine, causing enteric lesions. Infections determined by this protozoan may be a risk to public health, due to dysentery in animal keepers and veterinarians. This study aimed to determine the occurrence of infection by B. coli in pigs of distinct husbandry categories, as well as unlike physiological state, kept in farms with different hygienic-sanitary standards, located in the central region of Rio Grande do Sul State in Brazil.Materials, Methods & Results: Stool samples were collected from 12 different farms with different hygienic-sanitary standards being four farms of finisher pigs (G1; n = 287), four farms with pregnant females (G2; n = 60) and four farms with lactation sows (G3; n = 40), and all samples were submitted to coproparasitological analyses to verify the presence of cysts or trophozoites of B. coli. The infection levels were considered mild (1-100 cyst/trophozoite), moderate (101300 cyst/trophozoite) and high (>300 cysts/trophozoite). In addition, information about hygienic-sanitary conditions of each farm was collected. The occurrence of B. coli infection in all swine stool samples analyzed was 60.9% (236/387); however, in G1, G2 and G3 was 54.7% (157/287), 91.7% (55/60) and 65% (26/40) respectively. There was significant difference in the occurrence of G1 (P < 0.05) except between farms B and C (67.9% and 56.6% respectively). There was also a significant difference (P < 0.05) between the occurrence of B. coli found in G2 and G3. The infection levels were considered predominantly mild in G1; and mild to moderate in G2 and G3.Discussion: In this research it was confirmed the presence of B. coli in swine farms located in the central region of Rio Grande do Sul State in Brazil. This area is known as being an important producer of pigs in Brazil. The results obtained in this study, demonstrated that swine farms with better hygienic and sanitary standards, had mild infections by B. coli. However, the presence of intestinal parasites, especially protozoa, can occur even in properties with good management practices. However, protozoa infections can cause important production losses, especially when associated with other pathogens or nutritional problems. The occurrence of B. coli observed in pregnant (G2) and lactating (G3) females was significant, and the infection level was mild to moderate. These conditions suggest that pregnancy, childbirth and lactation are critical stages for females, mainly due to physiological stress, resulting in a change in the hormonal levels and immune status of the animals. Thus, these factors cause declines in the immune response of pigs making them susceptible to infections and the increase of cyst excretion of B. coli in feces. The abundance of protozoan cysts in feces contaminates the environment and increases the risk of infections in humans. In addition, it was demonstrated the occurrence of B. coli in an important site of swine production in RS, Brazil. B. coli is related to the physiological state of the animals and the hygienic and sanitary management in different categories of swine. In conclusion, this study highlights the epidemiological importance of swine as natural reservoir of Balantidium coli and the risk potential of infection to animals and humans. Additionally, sanitary program in farming pigs must be improved in order to guarantee healthy and food-safe product for consumers.

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Recent occurrence of Tinamus solitarius (Vieillot, 1819) (Tinamiformes, Tinamidae) in central Rio Grande do Sul state, southern Brazil

Check List ◽

10.15560/14.3.505 ◽

2018 ◽

Vol 14 (3) ◽

pp. 505-508

Author(s):

Ivan Luiz Brondani ◽

Everton Rodolfo Behr ◽

Veronica Pereira Damasceno ◽

Marilise Mendonça Krügel

Keyword(s):

Central Region ◽

Rio Grande ◽

The Other ◽

Southern Brazil ◽

Rio Grande Do Sul ◽

Recent Occurrence ◽

Western Portion

Tinamus solitarius (Vieillot, 1819), the Solitary Tinamou, was observed in the central region of Rio Grande do Sul state, on the western portion of the Serra Geral escarpment, in the municipality of Itaara. This population is the most austral of the species and is isolated from the 2 other populations that inhabit Rio Grande do Sul: 1 in Turvo State Park and the other in the eastern portion of the Serra Geral escarpment.

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Biomphalaria Tenagophila Guaibensis ssp. n. from Southern Brazil and Uruguay (pulmonata: Planorbidae). I. Morphology

Memórias do Instituto Oswaldo Cruz ◽

10.1590/s0074-02761984000400012 ◽

1984 ◽

Vol 79 (4) ◽

pp. 465-469 ◽

Cited By ~ 24

Author(s):

W. Lobato Paraense

Keyword(s):

Rio Grande ◽

Middle Part ◽

The Other ◽

Genital System ◽

Southern Brazil ◽

Rio Grande Do Sul ◽

Porto Alegre ◽

Coastal Belt ◽

Significant Difference ◽

Additional Support

A new subspecies of planorbid snail, biomphalaria tenagophila guaibensis, is described. It has been found along the coastal belt of the Brazilian state of rio grande do Sul and the middle part of Uruguay, from Porto Alegre to Mercedes. It differs from the nominate subspecies, Biomphalaria tenagophila tenagophila, in the appearance of the penial complex (prepuce longer and proportionally slenderer in B. t. guaibensis, shorter and proportionally stouter in b. t. tenagophila), in the ratio between the lengths of the penial sheath and the prepuce, in the ratio between the lengths of the uterine complex and the penial complex, and in a coefficient of difference of 2.44 for the ratio between the penis sheath and prepuce and of 2.02 for the ratio between the uterine complex and penial complex. The shell and the other organs of the genital system are similar in both subspecies. B. t. guaibensis is very similar to Biomphalaria occidentalis Paraense, 1981, but is readily separated from it by the presence of a vaginal pouch, which is lacking in the latter, besides showing highly significant difference in the penis sheath: prepuce and uterine complex: penial complex ratios. Crossbreeding experiments which lend additional support to the recognition of B. t. guaibensis as a subspecies will be reported elsewhere.

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Rendimento de grãos de soja e de milho, no Rio Grande do Sul, não difere entre eventos El Niño Oscilação Sul

Agrometeoros ◽

10.31062/agrom.v26i1.26376 ◽

2018 ◽

Vol 26 (1) ◽

Author(s):

Ronaldo Matzenauer ◽

Bernadete Radin ◽

Alberto Cargnelutti Filho

Keyword(s):

El Niño ◽

El Nino ◽

Southern Oscillation ◽

Rio Grande ◽

La Niña ◽

Rio Grande Do Sul ◽

La Nina ◽

Significant Difference ◽

Income Data ◽

The Relationship

O objetivo deste trabalho foi avaliar a relação entre o fenômeno El Niño Oscilação Sul - ENOS e o rendimento de grãos de soja e de milho no Rio Grande do Sul e verificar a hipótese de que os eventos El Niño são favoráveis e os eventos La Niña são prejudiciais ao rendimento de grãos das culturas. Foram utilizados dados de rendimento de grãos dos anos agrícolas de 1974/75 a 2016/17, e relacionados com as ocorrências de eventos ENOS. Foram analisados os dados de rendimento observados na colheita e os dados estimados com a remoção da tendência tecnológica. Os resultados mostraram que não houve diferença significativa do rendimento médio de grãos de soja e de milho na comparação entre os eventos ENOS. Palavras-chave: El Niño, La Niña, safras agrícolas. Abstract – The objective of this work was to evaluate the relationship between the El Niño Southern Oscillation (ENSO) phenomenon with the grain yield of soybean and maize in Rio Grande do Sul state, Brazil and to verify the hypothesis that the El Niño events are favorable and the La Niña events are harmful to the culture’s grain yields. Were used data from the agricultural years of 1974/75 to 2016/17, and related to the occurrence of ENOS events. We analyzed income data observed at harvest and estimated data with technological tendency was removed. The results showed that there was no significant difference in the average yield of soybeans and corn in the comparison between events.

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Unraveling the identity of Paepalanthus decorus (Eriocaulaceae)

Phytotaxa ◽

10.11646/phytotaxa.518.3.5 ◽

2021 ◽

Vol 518 (3) ◽

pp. 231-238

Author(s):

LUCAS ESPINDOLA FLORÊNCIO DA SILVA ◽

MARCELO TROVÓ

Keyword(s):

Floral Morphology ◽

Rio Grande ◽

Detailed Comparison ◽

The Other ◽

Original Publication ◽

Rio Grande Do Sul ◽

The South ◽

Type Specimens ◽

La Plata

Paepalanthus decorus was described by Delia Abbiatti from a single collection of individuals made by Carlos Luis Spegazzini in Uruguaiana, Rio Grande do Sul state, Brazil, deposited at the La Plata Museum. The species is known only from the type specimens, which were unusual for being collected far to the south of the distribution of the other species included in P. sect. Diphyomene. In recent nomenclatural treatments for P. sect. Diphyomene, P. decorus was disregarded, remaining known only from its original publication. Here, we critically evaluate the protologue, type specimens, and the vegetative and floral morphology of this species. As a result, we propose its synonymization under P. flaccidus. A detailed comparison of these species is provided, along with comments on typification, with a lectotype designated for P. flaccidus.

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Clinical, pathological and epidemiological aspects of outbreaks of bluetongue disease in sheep in the central region of Rio Grande do Sul

Pesquisa Veterinária Brasileira ◽

10.1590/s0100-736x2017001200014 ◽

2017 ◽

Vol 37 (12) ◽

pp. 1443-1452

Author(s):

Ronaldo M. Bianchi ◽

Welden Panziera ◽

Tatiane C. Faccin ◽

Gisane L. de Almeida ◽

Juliana F. Cargnelutti ◽

...

Keyword(s):

Central Region ◽

Striated Muscle ◽

Clinical Signs ◽

Rio Grande ◽

Nasal Discharge ◽

Rio Grande Do Sul ◽

Sample Collection ◽

Area At Risk ◽

Tissue Samples ◽

Facial Swelling

ABSTRACT: This article describes the clinical, pathological and epidemiological aspects of 17 outbreaks of bluetongue (BT) disease in sheep occurring between December 2014 and July 2015 in the central region of Rio Grande do Sul state (RS), southern Brazil. Affected farms were visited for clinical examination, necropsy, sample collection and epidemiological investigation. The outbreaks were seasonal and occurred during the summer and autumn. A total of 180 sheep (20.4%) out of 884 in 17 small herds were affected. All ages of Texel and mixed breed sheep were affected. However, lambs (younger than one year) had higher morbidity than adult sheep. The most frequent clinical signs were anorexia, lethargy, loss of body condition, facial swelling mainly involving the lips, and greenish seromucous or mucous nasal discharge. Pulmonary lesions characterized by edema were the most prevalent findings; however, erosive and ulcerative lesions in the upper gastrointestinal tract, as well as cardiac, skeletal muscle and esophageal striated muscle necrosis, and hemorrhage in the pulmonary artery were also frequent. The bluetongue virus (BTV) genome was detected by RT-PCR in blood and tissue samples (spleen and lungs) of 21 animals from 17 outbreaks. The virus involved in the outbreak 3 was subsequently isolated and shown to belong to serotype 17, for the first time reported in Brazil. In summary, our data support the BTV genotype 17 as the etiological agent of the outbreaks and indicate that the central region of RS is an area at risk for BT in sheep, a disease previously not recognized in the region.

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Brasilochondria riograndensis gen. nov., sp. nov. (Copepoda, Chondracanthidae) a parasite of flounders of Rio Grande do Sul State, Brazil

Revista Brasileira de Zoologia ◽

10.1590/s0101-81752004000300014 ◽

2004 ◽

Vol 21 (3) ◽

pp. 515-518 ◽

Cited By ~ 3

Author(s):

Vernon E. Thatcher ◽

Joaber Pereira Júnior

Keyword(s):

New Genus ◽

Rio Grande ◽

The Other ◽

Rio Grande Do Sul ◽

Spherical Head ◽

Paralichthys Orbignyanus

Brasilochondria riograndensis gen. nov., sp. nov. (Copepoda, Chondracanthidae) a parasite of the flounder, Paralichthys orbignyanus (Valenciennes, 1839), is described. The new genus has a spherical head a post-mandibular "neck" and two pairs of modified biramous legs. In these respects, it resembles Argentinochondria patagonensis Etchegoin, Timi & Sardella, 2003. In the Argentine genus, however, the bulbous head has a medial constriction and the posterior of the female lacks the lateral extensions that are present in the new genus. Pseudolernentoma brasiliensis Luque & Alves, 2003, also resembles the new genus but it lacks the lateral extensions of the trunk and the latter is cylindrical rather than flat. The second leg of the new genus is small and the endopod is shorter than the exopod. The other two genera have large second legs with subequal rami.

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Diversity and spatial distribution of black flies (Diptera: Simuliidae) in the Ijuí river drainage basin, Rio Grande do Sul, Brazil

EntomoBrasilis ◽

10.12741/ebrasilis.v12i2.845 ◽

2019 ◽

Vol 12 (2) ◽

pp. 47-56

Author(s):

Tieli Cláudia Menzel ◽

Sirlei Maria Hentges ◽

David Augusto Reynalte Tataje ◽

Milton Norberto Strieder

Keyword(s):

River Basin ◽

Indicator Species ◽

Drainage Basin ◽

Abiotic Factors ◽

Principal Component ◽

Rio Grande ◽

Anthropogenic Pressure ◽

Black Flies ◽

Rio Grande Do Sul ◽

Significant Difference

Abstract. In southern Brazil there are several problems regarding the hematophageal activity of black flies, and the information on the distribution of species are still insufficient. In this study, our main goals were to recognize Simuliidae species and to analyze abiotic factors regarding the distribution of immature stages (larva and pupa) in streams from the Ijuí River basin, Northwest of Rio Grande do Sul, Brazil. We sampled simulids specimens in 27 study sites, covering three regions (high, intermediate and low altitude). Concomitantly, we recorded abiotic factors in the studied sites, such as: temperature, electrical conductivity, dissolved oxygen, atmospheric pressure, pH, altitude and stream width. For data analysis, we performed Kruskal-Wallis, ANOVA, Principal Component Analysis (PCA), Analysis of Indicator Species and Canonical Correspondence (CCA). A total of 10 species of black Flies was recorded. Simulium pertinax Kollar, Simulium incrustatum Lutz and Simulium orbitale Lutz were the most frequent. There was no significant difference in richness and density of the species between the different regions studied, except for Simulium jujuyense Paterson & Shannon. The sampled environments were segregated according to the location within the basin, and only S. jujuyense was considered an indicator species of the upper region. These results can be explained by the homogeneous conditions of the Ijuí River basin, which have suffered anthropogenic pressure mainly due to agricultural activities, resulting in losses in local aquatic biodiversity. Also, it may indicate that the control must be conducted considering the basin as a whole, and not only as isolated stretches of the streams.Diversidade e distribuição espacial de borrachudos (Diptera: Simuliidae) na bacia hidrográfica do rio Ijuí, Rio Grande do Sul, BrasilResumo. No sul do Brasil existem problemas com atividade hematofágica de borrachudos e as informações referentes à distribuição das espécies ainda são insuficientes. O presente estudo visa reconhecer as espécies de Simuliidae e analisar fatores abióticos quanto a distribuição dos estágios imaturos (larva e pupa) em riachos da Bacia do Rio Ijuí, no Noroeste do Rio Grande do Sul, Brasil. Foram coletados simulídeos em 27 pontos de estudo, cobrindo três regiões da bacia (alta, intermediária e baixa altitude). Concomitantemente, foi feito o registro de fatores abióticos nos trechos estudados, tais como: temperatura, condutividade elétrica, oxigênio dissolvido, pressão atmosférica, pH, altitude e largura do riacho. Foram realizadas análises de Kruskal-Wallis ou ANOVA, Análise de Componentes Principais (PCA), Análise de Espécie Indicadora e de Correspondência Canônica (CCA). Foi registrado um total de 10 espécies de Simuliidae. Simulium pertinax Kollar, Simulium incrustatum Lutz e Simulium orbitale Lutz foram as mais frequentes. Não ocorreu diferença na riqueza e na densidade das espécies entre as diferentes regiões estudadas, exceto para Simulium jujuyense Paterson & Shannon. Os ambientes nos pontos de amostragem foram segregados de acordo com a sua localização na bacia, e apenas S. jujuyense foi considerada uma espécie indicadora da região alta. Tais resultados podem ser explicados pelas condições homogêneas da Bacia do Rio Ijuí, que vêm sofrendo pressão antropogênica principalmente devido às atividades agrícolas, resultando em perdas na biodiversidade aquática local. Também, indicam que o controle deve ser realizado considerando a bacia como um todo e não apenas em trechos isolados dos riachos.

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O lado avesso da extensão: universidade e sociedade (quem é o outro da relação?). Por uma pesquisa-intensão / The reverse side of the extension: university and society (who is the other of this relationship?). For une research-intension

Revista Polis e Psique ◽

10.22456/2238-152x.53947 ◽

2015 ◽

Vol 5 (2) ◽

pp. 150

Author(s):

Fernanda Fontana Streppel ◽

Analice De Lima Palombini

Keyword(s):

Rio Grande ◽

The Other ◽

Rio Grande Do Sul

Este artigo pretende discutir a articulação entre universidade e sociedade, levando a problemática da alteridade ao centro da análise. Parte da experiência do Coletivo de Rádio Potência Mental, como campo de pesquisa, extensão e estágio vinculados ao Instituto de Psicologia da Universidade Federal do Rio Grande do Sul, para debater algumas de suas funções na construção do conhecimento, na contribuição à sociedade e na formação profissional em saúde mental, especialmente do psicólogo. Procura pensar o lugar de alteridade ocupado pelo Coletivo na relação universidade-sociedade, terminando por atentar para a estratégia que o encontro com o fora da academia opera como potência da produção de alteridade em si mesma.

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Anthelminthic resistance of gastrointestinal nematodes in sheep to monepantel treatment in central region of Rio Grande do Sul, Brazil

Pesquisa Veterinária Brasileira ◽

10.1590/1678-5150-pvb-5188 ◽

2018 ◽

Vol 38 (1) ◽

pp. 48-52 ◽

Cited By ~ 4

Author(s):

Fernanda Ramos ◽

Luiza P. Portella ◽

Fernando de S. Rodrigues ◽

Caroline Z. Reginato ◽

Alfredo S. Cezar ◽

...

Keyword(s):

Rio Grande ◽

Gastrointestinal Nematodes ◽

Infected Sheep ◽

The Other ◽

Control Group ◽

Fecal Culture ◽

Rio Grande Do Sul ◽

Anthelminthic Resistance ◽

On Farm ◽

Experimental Group

ABSTRACT: Given the numerous reports of anthelminthic resistance of sheep nematodes to different anthelmintic compounds, this study aimed to evaluate the resistance status of gastrointestinal nematodes from naturally infected sheep to monepantel in the state of Rio Grande do Sul. Four farms that present extensive raising system and absence of anthelmintic treatment for 60 days were selected for the study. Lambs that present counts of eggs per gram of feces (EPG) ≥200 (sensitivity of 50 EPG) one day (D-1) before the treatment were select for the study and randomly separated into two groups, a control group and an experimental group treated with monepantel. Feces were collected 9 days after the treatment (D+9) for EPG counts and fecal culture. The monepantel was 100% effective only on 2. The efficacy found on farm 1, 3, and 4 were 2.82%, 25.8%, and 78.4%, respectably. There were no viable larvae post-treatment at farm 2, but the genera Haemonchus, Trichostrongylus, Cooperia, and Strongyloides were resistant to it at the other farms. This study shows the presence of parasites resistant to the treatment with monepantel, pointing to the importance of monitoring its efficacy in sheep flocks of Rio Grande do Sul, Brazil.

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