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  • Biology  (3)
  • Echovirus  (1)
  • 2020-2023
  • 2020-2022  (4)
  • 1
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    In:  http://aquaticcommons.org/id/eprint/16697 | 9602 | 2016-05-04 14:28:48 | 16697 | Instituto Nacional de Investigación y Desarrollo Pesquero (INIDEP), Mar del Plata, Argentina
    Publication Date: 2021-07-08
    Description: La glaciaciones ocurridas en la región expusieron en diferente grado la actual plataforma continental Argentina (océano Atlántico sudoccidental). Este trabajo de divulgación científica da a conocer un modelo de evolución paleogeográfica de las costas de la Pampa y la Patagonia, y brinda la posibilidad de localizar temporalmente la formación de los principales rasgos costeros del extremo sur de América del sur. Se incluyen además otras lecturas sugeridas relacionadas al tema.
    Description: Reprinted as: pp.11-17 in, Ciencia del Mar. Volumen temático 1, 12/2014; Asociación Ciencia Hoy. ISBN: 978-987-45584-0-4 (Special issue dedicated to 'Marine Sciences: 1988-2014')
    Keywords: Biology ; Ecology ; Oceanography ; PSW ; Argentina ; marine environment ; Continental shelves ; shelf geology ; glaciation ; palaeogeography ; sea level changes ; models
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 50-56
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  • 2
    Publication Date: 2021-06-28
    Description: Molecular markers based on mitochondrial DNA (mtDNA) are extensively used to study genetic relationships. mtDNA has been used in phylogenetic studies to understand the evolutionary history of species because it is maternallyinherited and is not subject to genetic recombination (Gyllensten et al., 1991). The high mutation rate ofmtDNA makes it a useful tool for differentiating between closely related species (Brown et al., 1979)—a tool that is especially important when significant variations occur between species, but not within species (Hill et al., 2001; Blair et al., 2006; Chow et al., 2006a).
    Keywords: Biology ; Ecology ; Fisheries
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 204-212
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  • 3
    Publication Date: 2021-07-01
    Description: Background:The rising temperature of the world’s oceans has become a major threat to coral reefs globally as the severityand frequency of mass coral bleaching and mortality events increase. In 2005, high ocean temperatures in the tropicalAtlantic and Caribbean resulted in the most severe bleaching event ever recorded in the basin.Methodology/Principal Findings:Satellite-based tools provided warnings for coral reef managers and scientists, guiding both the timing and location of researchers’ field observations as anomalously warm conditions developed and spread across the greater Caribbean region from June to October 2005. Field surveys of bleaching and mortality exceeded prior efforts in detail and extent, and provided a new standard for documenting the effects of bleaching and for testing nowcast and forecast products. Collaborators from 22 countries undertook the most comprehensive documentation of basin-scale bleaching to date and found that over 80% of corals bleached and over 40% died at many sites. The most severe bleaching coincided with waters nearest a western Atlantic warm pool that was centered off the northern end of the Lesser Antilles.Conclusions/Significance:Thermal stress during the 2005 event exceeded any observed from the Caribbean in the prior 20 years, and regionally-averaged temperatures were the warmest in over 150 years. Comparison of satellite data against field surveys demonstrated a significant predictive relationship between accumulated heat stress (measured using NOAA CoralReef Watch’s Degree Heating Weeks) and bleaching intensity. This severe, widespread bleaching and mortality willundoubtedly have long-term consequences for reef ecosystems and suggests a troubled future for tropical marine ecosystems under a warming climate
    Description: NOAA Coral Reef Conservation Program
    Description: Article Nr: e13969
    Keywords: Biology ; Ecology ; Environment ; Fisheries ; Caribbean Sea ; coral reefs ; bleaching ; climate change ; temperature effects ; CCMI
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 1-9
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  • 4
    Publication Date: 2021-11-23
    Description: Enteroviruses cause human diseases such as Mouth, Hand and Foot Syndrome, hemor rhagic conjunctivitis, aseptic meningitis, and viral meningoencephalitis. As yet, there is not specific therapy for most enteroviruses infections. The brown seaweeds of Sargassum genus synthesize a great variety of metabolites, which make them potential sources of compounds with antiviral activities. This study aimed to evaluate the in vitro antiviral activity of a hydro-alcoholic extract of Sargassum fluitans against three human enteroviruses: coxsackievirus A16, echovirus 9 and coxsackievirus A24. Cytotoxicity of the extract was evaluated in Vero, RD and Hep-2 cells by MTT method. Antiviral activity (EC50) was assessed by cytopathic effect inhibition in cells. Extracellular virucidal activity and reduction of viral yield were determined by endpoint viral titration assay. The antiviral activity was characterized by a time of addition assay. The extract showed antiviral inhibi- tory activity against all tested viruses. The extract also exhibited a virucidal effect against E9 and CVA16 and reduced the formation of infective particles in the cells in more than three logs. The extract was able to inhibit earlier and late stages in the enterovirus replication cycle. In conclusion, the present study demonstrated the effective in vitro antiviral activity of the brown seaweed Sargassum fluitans against clinically relevant enteroviruses, supporting their use as potential source of antiviral compounds.
    Description: Los enterovirus causan enfermedades humanas tales como el Síndrome de Mano, Pie y Boca, la conjuntivitis hemorrágica y la meningoencefalitis viral. Hasta el momento no existe una terapia específica para la mayoría de las infecciones por enterovirus. Las algas pardas del género Sargassum sintetizan una gran variedad de metabolitos, los cuales les convierten en fuentes potenciales de compuestos con actividad antiviral. Este estudio tuvo como objetivo evaluar la actividad antiviral in vitro de un extracto hidroalcohólico de Sargassum fluitans contra tres enterovirus humanos: coxsackievirus A16, echovirus 9 and coxsackievirus A24.La citotoxicidad del extracto se evaluó en las células Vero, RD y Hep-2 mediante el método del MTT. La actividad antiviral (CE50) se evaluó mediante la inhibición del efecto citopático en las células. La actividad virucida extracelular y la reducción del número de viriones se determinaron mediante ensayo de titulación viral de punto final. La actividad antiviral se carac- terizó mediante un ensayo de tiempo de adición. El extracto mostró actividad antiviral inhibitoria contra todos los virus probados. El extracto también exhibió efecto virucida contra el echovirus 9 y el coxsackievirus A16 y redujo la formación de partículas virales infectivas en las células en más de tres logaritmos. El extracto fue capaz de inhibir las etapas tempranas y tardías del ciclo replicativo. Se concluye que el pre- sente estudio demostró la efectiva actividad antiviral in vitro del alga parda Sargassum fluitans contra enterovirus clínicamente relevantes, apoyando su uso como fuente potencial de compuestos antivirales.
    Description: Published
    Description: Refereed
    Keywords: Sargassum fluitans ; Antiviral ; Enterovirus ; Echovirus ; Coxsackievirus
    Repository Name: AquaDocs
    Type: Journal Contribution
    Format: pp.43-55
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