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A preliminary analysis of death cause, capture-related mortality, and survival of adult red deer in northwestern Patagonia Ecología austral
Flueck,Werner T; Smith-Flueck,Joanne M; Bonino,Never A.
The red deer (Cervus elaphus), among the world´s 14 most invasive exotic mammals, has recently arrived in Patagonia. Forty-seven deer were captured, marked with radio collars, and monitored in order to determine survival rates and identify causes of death. Net gunning from a helicopter allowed captures to be evenly distributed through the study area and in a timely manner. The absence of capture related mortality in our study agrees with previously reported low rates for this method. Animals were monitored for periods ranging from 5 to 2611 days. Ten animals provided censored values due to radio failures or being shot: they survived on average 811 days (SE = 221) after capture. Ten animals experienced natural deaths with an average time alive after capture...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Invasion; Cervus elaphus; Puma concolor; Predation; Disease; Radio telemetry; Population dynamics; Capture by net gunning.
Ano: 2005 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1667-782X2005000100004
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Apical membrane antigen 1 is a cross-reactive antigen between Neospora caninum and Toxoplasma gondii, and the anti-NcAMA1 antibody inhibits host cell invasion by both parasites OAK
Zhang, Houshuang; Compaore, Muller K.A.; Lee, Eung-goo; Liao, Min; Zhang, Guohong; Sugimoto, Chihiro; Fujisaki, Kozo; Nishikawa, Yoshifumi; Xuan, Xuenan.
The cross-reactive antigens of Neospora caninum and Toxoplasma gondii are important in the exploration to determine the common mechanisms of parasite-host interaction. In this study, a gene encoding N. caninum apical membrane antigen 1 (NcAMA1) was identified by immunoscreening of a N. caninum tachyzoite cDNA expression library with antisera. from mice immunized with recombinant T gondii apical membrane antigen 1 (TgAMA 1). NcAMA1 was encoded by an open reading frame of 1695 bp, which encoded a protein of 564 amino acids. The single-copy NcAMA1 gene was interrupted by seven introns. NcAMA1 showed 73.6% amino acid identity to TgAMA1. Mouse polyclonal antibodies raised against the recombinant NcAMA1 (rNcAMA1) recognized a 69-kDa native parasite protein by...
Palavras-chave: Neospora caninum; Toxoplasma gondii; Apical membrane antigen 1; Cross-reactive; Invasion.
Ano: 2007 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1034
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Apoptosis in HEp-2 cells infected with Ureaplasma diversum Biol. Res.
Amorim,Aline Teixeira; Marques,Lucas Miranda; Santos,Angelita Maria Oliveira Gusmão; Martins,Hellen Braga; Barbosa,Maysa Santos; Rezende,Izadora Souza; Andrade,Ewerton Ferraz; Campos,Guilherme Barreto; Lobão,Tássia Neves; Cortez,Beatriz Araujo; Monezi,Telma Alvez; Machado-Santelli,Glaucia Maria; Timenetsky,Jorge.
BACKGROUND: Bacterial pathogens have many strategies for infecting and persisting in host cells. Adhesion, invasion and intracellular life are important features in the biology of mollicutes. The intracellular location ofUreaplasma diversum may trigger disturbances in the host cell. This includes activation or inhibition of pro and anti-apoptotic factors, which facilitate the development of host damage. The aim of the present study was to associate U. diversum infection in HEp-2 cells and apoptosis induction. Cells were infected for 72hs with four U. diversum clinical isolates and an ATCC strain. The U. diversuminvasion was analyzed by Confocal Laser Scanning Microscopy and gentamicin invasion assay. The apoptosis was evaluated using pro-apoptotic and...
Tipo: Journal article Palavras-chave: Ureaplasma diversum; Invasion; Apoptosis; HEp-2 cells.
Ano: 2014 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602014000100038
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Babesia bovis: Effects of cysteine protease inhibitors on in vitro growth OAK
Okubo, Kazuhiro; Yokoyama, Naoaki; Govind, Yadav; Alhassan, Andy; Igarashi, Ikuo.
In the present study, we examined the effects of four kinds of cysteine protease inhibitors (E64, E64d, leupeptin, and ALLN) on the in vitro asexual growth of Babesia bovis. Of these, only the lipophilic inhibitors, E64d and ALLN, were found to effectively inhibit the growth of B. bovis. In further experiments, E64d, but not ALLN, significantly suppressed the parasite’s invasion of host erythrocytes, while both chemicals, especially ALLN, inhibited the parasite’s replication within the infected erythrocytes. These data suggested the presence of cysteine protease(s) derived from B. bovis, in which the protease(s) would play important roles in the erythrocyte invasion and/or replication processes of the parasite.
Palavras-chave: Babesia bovis; Cysteine protease; Inhibitor; Invasion; Replication.
Ano: 2007 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1041
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Effects of a native and a non-native macrophyte species of Hydrocharitaceae on Chironomidae and Oligochaeta assemblages structure doi: 10.4025/actascibiolsci.v35i3.10855 Biological Sciences
Behrend, Rômulo Diego de Lima; Universidade Estadual de Maringá; Teixeira, Mariana Carolina; Universidade Estadual de Maringá; Fernandes, Sue Ellen Prata; Universidade Estadual de Maringá; Camargo, Janielly Carvalho; Universidade Estadual de Maringá; Rosin, Gisele Cristina; Universidade Estadual de Maringá; Takeda, Alice Michiyo; Universidade Estadual de Maringá.
This study investigated the structure of the Oligochaeta and Chironomidae assemblages associated with monospecific stands of two submerged macrophyte species: Egeria najas and Hydrilla verticillata. Samplings were carried out in Leopoldo Backwater and Paraná river, in August 2008. To assess the structure of Oligochaeta and Chironomidae assemblage in each macrophyte we calculated: species density, richness, diversity, and evenness. A detrended correspondence analysis (DCA) was used to summarize Oligochaeta and Chironomidae assemblages composition. The highest values of species density and richness for the two groups were recorded in H. verticillata. Although there were no significant differences in density, richness and Shannon diversity, the assemblage...
Tipo: Distribuição espacial Palavras-chave: Ecology upper Paraná river; Submerged macrophytes; Hydrilla verticillata; Egeria najas; Invasion; Naididae Ecology.
Ano: 2013 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/10855
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Host Cell Specificity on The Entry of Eimeria stiedai Sporozoites in Cultured Cells OAK
Rodriguez, M. E.; Njenga, M. J.; Kawano, T.; Omata, Yoshitaka; Saito, Atsushi; Toyoda, Yutaka.
Palavras-chave: Hepatobiliar epithelial cell; Eimeria stiedai; Invasion; Rabbit.
Ano: 1998 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/280
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Invasion of Matrix Species in Small Habitat Patches Ecology and Society
The diversity, expressed as species richness in equal-sized samples, of wood-living beetles in successional stages of deciduous forest after forest fires approximately 100 years ago did not differ between patch sizes in this study. Thus, the crucial question for conservation is whether the lack of reduction in diversity in small patches means that a number of small patches can elevate the regional diversity as efficiently as can one larger area. In the present study, the smaller patches did not differ from larger patches in substrate availability, quality, or heterogeneity. The frequency of a group of species was measured as the number of occurrences, viz. the number of trees on which a species was found, summed over all species in the group. The number of...
Tipo: Peer-Reviewed Reports Palavras-chave: Alpha (local) diversity; Beta (between-habitats) diversity; Deciduous forest; Disturbance; Diversity; Fire; Gamma (regional) diversity; Invasion; Matrix habitat; Patch size; Species-richness..
Ano: 1999
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Invasion of weedy rice in rice fields in Thailand: problems and management International Rice Research Institute
Maneechote, C.; Jamjod, S.; Rerkasem, B..
p.20-22
Palavras-chave: Weedy rice; Invasion; Weed control; Thailand.
Ano: 2004 URL: http://hdl.handle.net/123456789/975
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Invasiveness of Cut-Leaf Ground-Cherry (Physalis angulata L.) Populations and Impact of Soil Water and Nutrient Availability Chilean J. Agric. Res.
Travlos,Ilias S.
Biological invasions are a major threat to natural ecosystems and agroecosystems, while weed flora is noticeably changing globally. In this study we evaluated the potential of cut-leaf ground-cherry (Physalis angulata L.), a species native to America, to invade the semi-arid regions of Greece. Greenhouse and laboratory experiments were conducted to evaluate the effects of different environmental resources (nutrient and water availability) on seedling growth, biomass production, fecundity, and seed germination of four populations of cut-leaf ground-cherry. Our results suggest that cut-leaf ground-cherry does not tolerate extreme drought during the first growth stages, while it can survive and produce adequate and rapidly germinated seed (> 85%) under low...
Tipo: Journal article Palavras-chave: Physalis angulata; Invasion; Greece; Water stress.
Ano: 2012 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392012000300009
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Involvement of a Host Erythrocyte Sialic Acid Content in Babesia bovis Infection OAK
TAKABATAKE, Noriyuki; OKAMURA, Masashi; YOKOYAMA, Naoaki; OKUBO, Kazuhiro; IKEHARA, Yuzuru; IGARASHI, Ikuo; 横山, 直明; 五十嵐, 郁男.
Host sialic acid (SA) has recently been suggested to play an important role in erythrocyte (RBC) infection by Babesia spp. The present study attempted to further determine the specific type of SAs important in the RBC invasion. Bovine RBC was found to bear abundant α2-3-linked SA residues but not α2-6-linked SA in nature, confirmed by flow cytometric analysis of the neuraminidase (Nm)-treated RBCs. Lectin-blot analyses revealed the removal of α2-3-linked SAs from the 97-, 33-, and 31-kDa bands by the Nm treatment. Addition of the Nm-treated RBCs into an in vitro culture of B. bovis resulted in a decreased population of the parasitized RBCs. The thin smear samples from the cultures were then observed under a confocal laser scanning microscope after staining...
Palavras-chave: Babesia bovis; Erythrocyte; Invasion; Sialic acid.
Ano: 2007 URL: http://ir.obihiro.ac.jp/dspace/handle/10322/4166
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Microsatellite markers developed through pyrosequencing allow clonal discrimination in the invasive alga Caulerpa taxifolia ArchiMer
Arnaud-haond, Sophie; Candeias, Rui; Serrao, Ester A.; Teixeira, Sara.
Polymorphic microsatellites were developed for the invasive green algae Caulerpa taxifolia using next generation DNA sequencing. Results showed a limited rate of microsatellites for the amount of sequences, possibly explaining failure of previous attempts for microsatellite development through classical methods. Eight polymorphic loci were selected that exhibited polymorphism and a null or negligible rate of amplification failure. The number of alleles per locus ranged from two to seven. The reconstruction of Multi Locus Genotypes and the heterozygosity and departure from Hardy-Weinberg equilibrium confirmed the influence of clonal reproduction and showed the usefulness of this set of markers to successfully discriminate clonal lineages and analyze the...
Tipo: Text Palavras-chave: Caulerpa taxifolia; Algae; Invasion; Mediterranean; Queensland; New South Wales; Seagrass.
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00126/23720/21598.pdf
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Modeling trophic interactions in Lake Kivu: What roles do exotics play? ArchiMer
Villanueva, Ching-maria; Isumbisho, M; Kaningini, B; Moreau, J; Micha, J.
An Ecopath model of the southern part of Lake Kivu, a deep African equatorial lake was constructed to quantitatively describe the possible impact of fish introductions in this ecosystem. This study is considered as an initial step in summarizing ecological and biological information, under a coherent framework, on this ecosystem. Fourteen compartments were considered. As a phytoplankton-based food web, it is observed that key food sources are not fully utilized as transfer efficiencies per trophic levels (TL) varies between 4.5 and 9.4%. Zooplankton plays a major role in transferring organic matter from TL1 to higher TLs due to the abundance of zooplanktivores. Shifts in food preferences and distribution of some of the fish functional groups were observed...
Tipo: Text Palavras-chave: Lake Kivu; Exotic fishes; Invasion; Transfer efficiency; Food web structure.
Ano: 2008 URL: http://archimer.ifremer.fr/doc/2008/publication-4722.pdf
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Novelty, Adaptive Capacity, and Resilience Ecology and Society
Allen, Craig R; U.S. Geological Survey, Nebraska Cooperative Fish and Wildlife Research Unit; allencr@unl.edu; Holling, C. S.; Department of Zoology, University of Florida; holling@zoo.ufl.edu.
We present a conceptual framework that explores some of the forces creating innovation and novelty in complex systems. Understanding the sources of variability and novelty may help us better understand complex systems. Understanding complex phenomena such as invasions, migration, and nomadism may provide insight into the structure of ecosystems and other complex systems, and aid our attempts to cope with and mitigate these phenomena, in the case of invasions, and better understand and or predict them. Our model is broadly applicable to ecological theory, including community ecology, resilience, restoration, and policy. Characterizing the link between landscape change and the composition of species communities may help policymakers in their decision-making...
Tipo: Peer-Reviewed Insight Palavras-chave: Adaptation; Cross-scale; Extinction; Innovation; Invasion; Speciation.
Ano: 2010
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Relationship between fragmentation, degradation and native and exotic species richness in an Andean temperate forest of Chile Gayana Botánica
ROJAS,ISABEL; BECERRA,PABLO; GÁLVEZ,NICOLÁS; LAKER,JERRY; BONACIC,CRISTIÁN; HESTER,ALISON.
Human impact such as forest fragmentation and degradation may have strong effects on native and exotic plant communities. In addition, these human-caused disturbances occur mostly in lowlands producing greater fragmentation and degradation there than in higher elevations. Plant invasion should be greater in more fragmented and degraded forests and hence lowlands should be more invaded than higher elevations. In turn, native species richness should be negatively related to fragmentation and degradation and hence greater in higher elevations within a forest type or elevation belt. We assessed these hypotheses in an Andean temperate forest of southern Chile, Araucanía Region. We recorded the vascular plant composition in twelve fragments of different size,...
Tipo: Journal article Palavras-chave: Fragmentation; Forest degradation; Elevation gradient; Invasion; Plant diversity.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432011000200006
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Reprimo as a modulator of cell migration and invasion in the MDA-MB-231 breast cancer cell line Biol. Res.
Buchegger,Kurt; Ili,Carmen; Riquelme,Ismael; Letelier,Pablo; Corvalán,Alejandro H.; Brebi,Priscilla; Huang,Tim Hui-Ming; Roa,Juan Carlos.
BACKGROUND: Reprimo (RPRM), a highly glycosylated protein, is a new downstream effector of p53-induced cell cycle arrest at the G2/M checkpoint, and a putative tumor suppressor gene frequently silenced via methylation of its promoter region in several malignances. The aim of this study was to characterize the epigenetic inactivation and its biological function in BC cell lines. METHODS: The correlation between RPRM methylation and loss of mRNA expression was assessed in six breast cancer cell lines by methylation specific PCR (MSP), 5'-Aza-2'-deoxycytidine treatment and RT-PCR assays. MDA-MB-231 cells were chosen to investigate the phenotypic effect of RPRM in cell proliferation, cell cycle, cell death, cell migration and invasion. RESULTS: In the cancer...
Tipo: Journal article Palavras-chave: Reprimo; MDA-MB-231; Migration; Invasion.
Ano: 2016 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602016000100005
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Role of regenerating gene IA expression on local invasion and survival in nasopharyngeal carcinoma Biol. Res.
Xing,Haijie; Chen,Xiangdong; Han,Yaofeng.
Abstract Background Regenerating gene IA (REGIA) plays an important role in tissue regeneration and tumors prognosis of epithelium origin. However, the role of REGIA in nasopharyngeal carcinoma (NPC) is unclear. This study aims to investigate the expression and function of REG1A in NPC. Results We have found that there was 63 patients with REGIA positive expression of 155 patients in this study (40.65%). The positive expression rate of REGIA was 30.50, 44.44 and 47.83% in stage T2, T3 and T4 patients, respectively. The REGIA expression was significantly difference in T2 and T4 stage tumors or T2 and T3–T4 stage. The positive expression rate of REGIA was found to be higher in patients with cervical lymph node persistence than those with cervical...
Tipo: Journal article Palavras-chave: Nasopharyngeal carcinoma; Regenerating gene IA; Invasion; Survival.
Ano: 2017 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602017000100227
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Spatial distribution in a temperate coastal ecosystem of the wild stock of the farmed oyster Crassostrea gigas (Thunberg) ArchiMer
Cognie, B; Haure, Joel; Barille, L.
The Pacific oyster, Crassostrea gigas, well known throughout the world because of its ability to adapt to a wide range of environmental conditions, was introduced for cultivation into France on a massive scale in the 1970s. With global warming, the reproductive population, confined at the beginning to the south of the French Atlantic coast, became established at more northern latitudes (above 45 degrees 58'N), and wild C gigas began to colonize coastal areas such as our study site, Bourgneuf Bay (1 degrees-2 degrees W, 46 degrees-47 degrees N), an oyster-farming site. An original approach, based on orthophotograph analysis and in situ biomass sampling, revealed that, in the northern part of this bay, more than 70% of the total C gigas biomass was composed...
Tipo: Text Palavras-chave: Orthophotographs; Invasion; Wild stock; Introduced species; Crassostrea gigas.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/publication-1878.pdf
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The Effects of Urban Sprawl on Birds at Multiple Levels of Biological Organization Ecology and Society
Blair, Robert; University of Minnesota; blairrb@umn.edu.
Urban sprawl affects the environment in myriad ways and at multiple levels of biological organization. In this paper I explore the effects of sprawl on native bird communities by comparing the occurrence of birds along gradients of urban land use in southwestern Ohio and northern California and by examining patterns at the individual, species, community, landscape, and continental levels. I do this by assessing the distribution and abundance of all bird species occupying sites of differing land-use intensity in Ohio and California. Additionally, I conducted predation experiments using artificial nests, tracked the nest fate of American Robins and Northern Cardinals, and assessed land cover in these sites. At the individual level, predation on artificial...
Tipo: Peer-Reviewed Reports Palavras-chave: Avian community; California; Cardinalis cardinalis; Extinction; Faunal homogenization; Invasion; Landscape heterogeneity; Nesting success; Ohio; Predation; Turdus migratorius; Urbanization.
Ano: 2004
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The occurrence, bionomics and potential impacts of the invasive freshwater snail Tarebia granifera (Lamarck, 1822) (Gastropoda: Thiaridae) in South Africa Naturalis
Appleton, C.C.; Forbes, A.T.; Demetriades, N.T..
The Asian prosobranch snail Tarebia granifera was reported from South Africa (and Africa) for the first time in 1999 in northern KwaZulu-Natal though it was probably introduced sometime prior to 1996. In the 10 years since its discovery it has spread rapidly, particularly northwards, into Mpumalanga province, the Kruger National Park and Swaziland. The snail has colonized different types of habitat, from rivers, lakes and irrigation canals to concrete lined reservoirs and ornamental ponds. It reaches very high densities, up to 21 000 m-2, and is likely to impact on the entire indigenous benthos of the natural waterbodies of the region – more so than any other invasive freshwater invertebrate known from the country. The indigenous thiarids Thiara amarula,...
Tipo: Article / Letter to the editor Palavras-chave: Tarebia granifera; South Africa; Invasion; Bionomics; 42.73.
Ano: 2009 URL: http://www.repository.naturalis.nl/record/311930
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Weed Control as a Rationale for Restoration: The Example of Tallgrass Prairie Ecology and Society
Blumenthal, Dana M; University of Minnesota; dblumenthal@npa.ars.usda.gov; Jordan, Nicholas R; University of Minnesota; perr0128@tc.umn.edu; Svenson, Elizabeth L; University of Minnesota; esvenso1@swarthmore.edu.
The potential weed control benefits of ecological restoration are rarely cited and largely unstudied. Nevertheless, the nature of many restoration target communities, i.e., diverse, late-successional communities, suggests that restoration may control weeds and that the invasibility of plant communities may decrease with both diversity and successional age. Given the high cost of weed control in nonagricultural land, weed control benefits could be a strong incentive for restoration efforts. We examined the cumulative effects of restoration on weed populations 7 yr after tallgrass prairie restoration on a Minnesota sand plain. The numbers and biomass of volunteer weeds were compared among randomized plots with (1) no restoration, (2) prairie seed addition,...
Tipo: Peer-Reviewed Reports Palavras-chave: Community invasibility; Invasion; Prairie; Restoration; Succession; Weed competition; Weed control; Weeds.
Ano: 2003
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