SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

Oliveira, Márcia Teixeira de; Universidade Federal de Mato Groo; Hardoim, Edna Lopes; Universidade Federal do Mato Grosso.

An evaluation was made of the effect of temporal variations on an assembly of Testaceae in several water bodies located in Chapada dos Guimarães National Park. A sampling point was selected at each study site, where 4 samplings were collected per season, considering the climatic conditions of the dry and rainy periods. The findings revealed 80 infrageneric taxa, 05 families and 12 genera. Pearson’s correlation between the second axis of the DCA and the first axis of the PCA was significant, even after applying Bonferroni’s correction for multiple significance tests (r = 0.683; p = 0.014). Thus, the temporal variation of the limnological data, which showed higher values of turbidity, total solids, color and temperature for the rainy period and higher...

Palavras-chave: Testacean; Protozoa; Rhizopoda; Waterfall regions Testacean; Protozoa; Rhizopoda; Waterfall regions.

Ano: 2010

URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/7456

Planktonic heterotrophic nanoflagellate abundance along a trophic gradient in subtropical reservoirs: influence of a bottom-up or top-down control mechanism

Pereira, Danielle Goeldner; Universidade Estadual de Maringá; Rodrigues, Luzia Cleide; Universidade Estadual de Maringá; Lansac-Tôha, Fábio Amodêo; Universidade Estadual de Maringá; Velho, Luiz Felipe Machado; Universidade Estadual de Maringá.

The aim of the current study was to assess the variability in heterotrophic nanoflagellate abundance attributable to variables responsible for the influence of bottom-up and top-down control mechanisms in the plankton food web along a trophic gradient in subtropical reservoirs (Paraná State,Brazil). In particular, we hypothesised that food resources were the main determinant for the abundance of heterotrophic nanoflagellates (HNF) along a trophic gradient. Results showed that HNF communities were weakly influenced by the bottom-up mechanism. Moreover, there was evidence of a slight influence from a top-down control mechanism on this community. Therefore, the results of the present study did not corroborate the hypothesis initially proposed, and further...

Species richness of testate amoebae in different environments from the upper Paraná river floodplain (PR/MS) - doi: 10.4025/actascibiolsci.v33i3.7261

Palavras-chave: 2.00.00.00-6 plankton; Protozoa; Food resource availability; Cascading effect; Freshwater environments Ecologia.

Ano: 2014

URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/19084

Costa, Deise de Morais; Universidade Estadual de Maringá; Alves, Geziele Mucio; UEM; Velho, Luiz Felipe Machado; UEM; Lansac-Tôha, Fábio Amodêo; UEM.

This study evaluated the species richness of testate amoebae in the plankton from different environments of the upper Paraná river floodplain. Samplings were performed at subsurface of pelagic region from twelve environments using motorized pump and plankton net (68 µm), during four hydrological periods. We identified 67 taxa, distributed in seven families and Arcellidae, Difflugiidae and Centropyxidae were the most representative families. Higher values of species richness were observed in the lakes (connected and isolated) during the flood pulses. Centropyxis aculeata, Difflugia gramem and D. pseudogramem were frequent throughout the study period. Seasonal variability of species in the channels and isolated lakes was evidenced by beta...

Palavras-chave: Protozoa; Plankton; Diversity; Species composition Protozoa; Plankton; Diversity; Species composition.

Ano: 2011

URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/7261

Seasonal distribution of nanoflagellates and bacterioplankton and relationship with environmental factors in a brazilian semi-arid reservoir - doi: 10.4025/actascibiolsci.v34i4.10832

Amorim, Aline de Souza; Universidade Federal do Rio Grande do Norte; Araújo, Magnólia Fernandes Florêncio de; Universidade Federal do Rio Grande do Norte.

The semi-arid region of Rio Grande do Norte State, in northeast Brazil exhibits specific physical-climatic aspects: the climate is very hot, with mean annual rainfall of 550 mm, characterized by periodic drought and uneven distribution of rains. Due to these features, is important to study and preserve its water bodies. The purpose of this paper was to characterize and investigate bacterioplankton and heterotrophic nanoflagellates, and their seasonal variations in a reservoir located in the semi-arid region of Rio Grande do Norte State, in 2008. To this aim, four samplings were carried out in the rainy season and three in the dry season to determine the biotic and abiotic variables. Bacterial densities in the reservoirs ranged from 8.98 x 106 to 1.62 x 107...

Tipo: Estudo ecológico

Palavras-chave: 2.00.00.00-6 microorganisms; Dam; Protozoa; Abiotic variables 2.12.00.00-9.

Ano: 2012

URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/10832

Flagellate protist abundance in phytotelmata of Aechmea distichantha Lem. (Bromeliaceae) in the upper Paraná river basin - doi: 10.4025/actascibiolsci.v35i4.17134

Duarte, Gisele Silva Costa; Alves, Geziele Mucio; Lansac-Tôha, Fernando Miranda; Velho, Luiz Felipe Machado; Lansac-Tôha, Fábio Amodêo.

In some Bromeliaceae species the leaf sheaths form a tank or phytotelma, accumulating water and organic detritus, conditions that allow the establishment of different communities. Thus, this study evaluated the relationship between diameter and volume of water in the tank of the bromeliad Aechmea distichantha Lem. and density of flagellates found in the phytotelmata, as well as the influence of the hydrological periods and proximity of sampled strata on the phytotelma patterns of abundance distribution. Samplings were conducted in two hydrological periods in 2010. In each sampling, four plants were collected from three different strata, classified according to the distance from the river level. A one-way ANOVA identified significant differences in...

Presence of parasitic structures in lettuces served in self-service restaurants of São Miguel do Oeste, Santa Catarina State, Brazil

Palavras-chave: Ecologia/Ecologia de Ecossistemas Phytotelma; Protozoa; Bromeliad; Rocky walls Ecologia de Protoplâncton.

Ano: 2013

URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/17134

Vidigal, Tiago Mateus Andrade; Landivar, Elaine Eloiza Cortellini.

Consuming raw food like lettuce may carry protozoa cysts and helminth eggs, causing parasitic infections. Therefore, the parasitological analysis of this type of food it’s important for public health because it provides data on the hygiene conditions in which these vegetables were produced, transported, processed and handled until the ingestion. This study aimed to evaluate the occurrence of parasitic structures in samples of lettuce (Lactuca sativa) sold in self-service restaurants in São Miguel do Oeste, Santa Catarina State, Brazil. The samples were randomly collected in 20 locations in duplicate, prepared according to the method of Hoffman, Pons, and Janer (1934) and analyzed with an optical light microscopy. The parasitic structures found were Cysts...

Relationship between testicular lesion and hormone levels in male rats infected with Trypanosoma evansi

Palavras-chave: Protozoa; Helminths; Contamination; Food; Vegetables..

Ano: 2018

URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/35027

Anais da ABC (AABC)

FACCIO,LUCIANA; SILVA,ALEKSANDRO S. DA; TONIN,ALEXANDRE A.; OBERHERR,LUCAS; GRESSLER,LUCAS T.; OLIVEIRA,CAMILA B.; OLIVEIRA,DIONATAN T.; SANGOI,MANUELA B.; MORESCO,RAFAEL N.; SAMARA,YASMIN N.; VEIGA,MARCELO; DUARTE,MARTA M.M.F.; MONTEIRO,SILVIA G..

The aim of this study was to evaluate the relationship between testicular lesions and hormone levels in rats experimentally infected with Trypanosoma evansi. For that, the measurement of reproductive hormones, histopathology and biomarkers of cellular injury were carried out in twenty-four animals, which were divided into two groups with 12 animals each. Group A was the negative control, or uninfected, while group B was composed by animals infected with T. evansi. Both groups were divided again into two other subgroups (n=6), from which serum and testicular fragments were collected on days 5 (A1 and B1) and 15 (A2 and B2) post-infection (PI). The morphological analysis showed increased alterations of head and tail of sperm in infected rats when compared...

Quantification of ruminal microbiota and production of methane and carbonic dioxide from diets with inclusion of glycerin

Palavras-chave: Protozoa; Wistar rats; Testicular lesion; Reproduction; Oxidative stress.

Ano: 2014

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000301537

Arq. Bras. Med. Vet. Zootec.

Santos,V.C.; Ezequiel,J.M.B.; Homem Junior,A.C.; Pinheiro,R.S.B..

The aim of this study was to quantify the liquid-associated bacteria and protozoa of the rumen and to evaluate the potential of in vitroproduction of gases CH4 and CO2 of diets with inclusion of glycerin for sheep. Two diets were formulated with a roughage:concentrate ratio of 20:80, according to the presence or absence of glycerin: G0 - control, without glycerin; and G10 - 10% glycerin as part of the concentrate. To quantify the liquid-associated bacteria and protozoa from the rumen and production of CH4 and CO2 gases, a completely randomized design was used. The diets had no effect (P>0.05) on production and composition of liquid-associated protozoa and bacteria from the rumen of lambs. Likewise, a (P>0.05) diet effect was not observed on...

First report of Epibiont ciliates (Ciliophora: Peritrichia) living on larvae of Leptophlebiidae (Ephemeroptera) from Brazil

Palavras-chave: Sheep; Bacteria; Gases; Nitrogen; Protozoa.

Ano: 2015

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352015000100205

BABT

Abrahão,Daniel Peroni; Mello,José Leonardo; Gorni,Guilherme; Corbi,Juliano José.

ABSTRACT Epibiosis was understood as a commensalism relation between two or more organisms. However, some studies have shown that epibionts can cause deleterious effects to their host. Here, we reported the first report of epibiosis between protozoa Epibiont ciliates (Ciliophora: Peritrichia) living on larvae of Ephemeroptera from Brazil.

Ocorrência de protozoários e helmintos em amostras de fezes de cães e gatos da cidade de São Paulo

Palavras-chave: Epibiosis; Protozoa; Ephemeroptera.

Ano: 2017

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132017000100401

Braz. J. Vet. Res. Anim. Sci.

GENNARI,Solange Maria; KASAI,Nobuko; PENA,Hilda Fátima de Jesus; CORTEZ,Adriana.

Foram examinadas, pelo Laboratório de Doenças Parasitárias do Departamento de Medicina Veterinária Preventiva e Saúde Animal, da Faculdade de Medicina Veterinária e Zootecnia da Universidade de São Paulo, no período de janeiro de 1991 a janeiro de 1995, amostras de 353 cães e de 187 gatos, com idades variadas e de diferentes áreas da cidade de São Paulo. Os métodos de diagnóstico empregados foram: centrífugo-flutuação em solução de sacarose e centrífugo-sedimentação em água-éter. Aproximadamente 45,0% das amostras de cães examinadas (160 amostras) apresentaram-se positivas e o percentual de ocorrência de parasitos, em relação ao total de amostras foi: Ancylostoma spp. 20,40; Toxocara canis 8,49; Giardia sp. 7,65; Cryptosporidium parvum 2,83; Cystoisospora...

Involvement of nitric oxide and its up/down stream molecules in the immunity against parasitic infections

Palavras-chave: Cães; Gatos; Helmintos; Protozoa.

Ano: 1999

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-95961999000200006

BJID

Nahrevanian,Hossein.

Nitric oxide (NO) is a potent mediator with diverse roles in regulating cellular functions and signaling pathways. The NO synthase (NOS) enzyme family consists of three major isoforms, which convey variety of messages between cells, including signals for vasorelaxation, neurotransmission and cytotoxicity. This family of enzymes are generally classified as neuronal NOS (nNOS), endothelial NOS (eNOS) and inducible NOS (iNOS). Increased levels of NO are induced from iNOS during infection; while eNOS and nNOS may be produced at the baseline in normal conditions. An association of some key cytokines appears to be essential for NOS gene regulation in the immunity of infections. Accumulating evidence indicates that parasitic diseases are commonly associated with...

Evaluación in vitro de subproductos agrícolas y plantas con capacidad desfaunante sobre la producción de metano.

Palavras-chave: INOS; Nitric oxide; NO; Immunity; Helminth; Parasite; Protozoa.

Ano: 2009

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702009000600010

Colegio de Postgraduados

Portela Díaz, Diego Felipe.

Actualmente se necesitan alternativas que disminuyan la emisión de metano asociada a la producción ganadera, una opción, es el uso de plantas que contienen metabolitos secundarios y causan la desfaunación ruminal. El presente estudio tuvo como objetivo principal, evaluar la capacidad desfaunante in vitro de diferentes plantas y subproductos agrícolas, así como su efecto en algunas variables de fermentación ruminal, población de microorganismos, producción de dióxido de carbono y metano. En la primera fase, se evaluaron 10 plantas y 6 subproductos agrícolas. El follaje del chicalote blanco (Argemone ochroleuca) y el subproducto, cascabillo de café (Coffea arabica) fueron seleccionados, ya que presentaron la mayor capacidad desfaunante. A la 96 h de...

Palavras-chave: Metano; Desfaunación; Protozoarios; Coffea arabica; Argemone ochroleuca; Methane; Defaunation; Protozoa; Ganadería; Maestría.

Ano: 2012

URL: http://hdl.handle.net/10521/1711

Estado de conocimiento de los tecamebianos dulceacuícolas de Chile

Gayana

Zapata Madrid,Jaime.

Las tecamebas son un grupo de protozoos que viven principalmente en las comunidades acuáticas y de ambientes húmedos (suelos, turberas, etc.), en donde juegan un importante rol como descomponedoras de celulosa y lignina; además participan activamente en diversos procesos biológicos que ocurren en los ecosistemas acuáticos. Con respecto al conocimiento de las tecamebas en Chile, éste se mantiene en un estado muy incipiente, de ahí la necesidad de contar con más especialistas, ya que este grupo está adquiriendo cada vez más importancia por su uso en problemas de paleolimnología, como bioindicadores de ambientes lacustres contaminados, como indicadores pedológicos, entre otros.

Tipo: Journal article

Palavras-chave: Protozoa; Tecamebas; Taxonomía; Chile.

Ano: 2006

URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-65382006000100006

Определитель фауны Чёрного и Азовского морей: Свободноживущие беспозвоночные.Т.1.Простейшие, губки, кишечнополостные, черви, щупальцевые

IBSS Repository

Мордухай-Болтовский, Ф. Д. (ред.).

Определитель обеспечивает возможность точного установления научного названия и систематического положения всех встречаемых в море организмов. Для каждой группы приводятся анатомо-морфологический обзор, определительные таблицы отрядов, семейств и родов с их краткими характеристиками и таблицы для определения видов. Рисунки приводятся для всех видов. Определитель выпущен в трех томах. В первый том включены простейшие, губки, кишечнополостные, черви, щупальцевые. Второй том охватывает всех свободноживущих представителей класса ракообразных, включая виды, населяющие опресненные солоноватоводные районы (с соленостью не менее 2-3%). Третий том посвящен группам свободноживущих беспозвоночных, не вошедшим в первые два тома, а именно: членистоногим (кроме...

Tipo: Book

Palavras-chave: Protozoa; Porifera; Coelenterata; Nemertini; Nemathelminthes; Annelida; Tentaculata; Oligochaeta; Hirudinea.

Ano: 1968

URL: http://repository.ibss.org.ua/dspace/handle/99011/1078

Ingestion of a bacterivorous ciliate by the oyster Crassostrea gigas: Protozoa as a trophic link between picoplankton and benthic suspension-feeders

Le Gall, Solange; Bel Hassen, Malika; Le Gall, Pierre.

The linked concepts of 'microbial loop' and 'protozoan trophic link' have been very well documented in filter-feeding microzooplankton such as copepods, but have not been applied to energy transfer to benthic suspension-feeding macrofauna, with the exception of the recent demonstration of heterotrophic flagellate assimilation by mussels. The oyster Crassostrea gigas obtains energy resources by filtering microalgae (similar to 5 to 100 mu m). However, in turbid estuaries, light-limited phytoplanktonic production cannot entirely account for oyster energy requirements. Conversely, picoplankters (<2 mu m), which are main effecters of coastal energy flow and matter cycling, are not efficiently retained by oyster filtration. Ciliate protozoal as both...

Tipo: Text

Palavras-chave: Oyster; Food sources; Picoplankton; Protozoa; Trophic link.

Ano: 1997

URL: http://archimer.ifremer.fr/doc/00337/44788/44482.pdf

Factors affecting bacterial biomass and growth in the Duplin River estuary and coastal Atlantic Ocean.

Mise au point d'outils moléculaires pour le diagnostic des parasites de type « Mikrocells » chez l'huître

Fallon, R; Newell, S; Sherr, B; Sheer, E.

Bacterial numbers and growth rates were measured in coastal, planktonic systems of the Western Atlantic ocean. Seasonal responses in growth rates of the bacterial assemblage were present at some sites, but these may be related to seasonal changes in substrate supply rather than to changes in temperature. Bacterial growth rates tended to decline with increasing distance from shore. There was evidence for predator-prey population cycles in the bacteria and < 17 mu m protozoa in the Duplin River Estuary which may indicate that the bacterial assemblage serves as prey for protozoan populations. In summer, a significant negative correlation between mu (instantaneous growth rate) and cell numbers in the bacterial assemblage indicated that substrate limitation...

Tipo: Text

Palavras-chave: Protozoa; Plankton; Bacteria; Predators; Grazing; Temperature effects; Seasonal variations; Limiting factors; Interspecific relationships; Nutrients (mineral); Growth.

Ano: 1984

URL: http://archimer.ifremer.fr/doc/1984/acte-955.pdf

Release of dissolved amino acids by flagellates and ciliates grazing on bacteria

Kerdudou, Nolwenn.

Tipo: Text

Palavras-chave: Protozoa; Parasite identification; Ostrea edulis.

Ano: 2001

URL: http://archimer.ifremer.fr/doc/2001/rapport-1764.pdf

Flow cytometry characterisation of defense cellular mechanisms from flat oyster, Ostrea edulis, parasited with Bonamia ostreae

Ferrier-pages, C; Karner, M; Rassoulzadegan, F.

Release of amino acids was examined in the laboratory in the form of dissolved primary amine (DPA) by two marine planktonic protozoa (the oligotrichous ciliate, Strombidium sulcatum and the aplastidic flagellate Pseudobodo sp.) grazing on bacteria. DPA release rates were high (19-25 x 10(-6) and 1.8-2.3 x 10(-6) mu mol DPA cell(-1) h(-1) for flagellates and ciliates, respectively) during the exponential phase, when the ingestion rates were maximum. Release rates were lower during the other growth phases. The release of DPA accounted for 10 % (flagellates) and 16 % (ciliates) of the total nitrogen ingested. Our data suggest that the release of DPA by protozoa could play an important role in supporting bacterial and consequently autotrophic pico- and...

Tipo: Text

Palavras-chave: Acides aminés; Protozoaires; Taux d'excrétion; Matière organique dissoute; Amino acids; Protozoa; Excretion rates; Dissolved organic matter.

Ano: 1998

URL: http://archimer.ifremer.fr/doc/00326/43670/43200.pdf

Diseases of cultured molluscs in Australia

Garcia, Sandrine.

Tipo: Text

Palavras-chave: Cytometry; Disease resistance; Protozoa; Ostrea edulis.

Ano: 2000

URL: http://archimer.ifremer.fr/doc/2000/rapport-1925.pdf