ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Articles  (622)
  • Open Access-Papers  (622)
Collection
  • Articles  (622)
Language
  • 1
    Publication Date: 2021-06-28
    Description: Item includes English and Spanish versions of the report.
    Keywords: Fisheries ; GCFI
    Repository Name: AquaDocs
    Type: conference_item
    Format: application/pdf
    Format: application/pdf
    Format: 225-228
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Publication Date: 2021-05-19
    Description: Con el propósito de determinar la variación espacio-temporal en la formación de la estructura vertical de clorofila-a y su variabilidad en la Bahía de La Paz, y zona oceánica adyacente de Baja California Sur, México, se realizaron dos cruceros en los meses de abril (primavera) y septiembre (otoño) durante el año 2009. Para caracterizar los perfiles de clorofila-a se efectuaron muestreos con hidrocalas verticales a profundidades de superficie, 20, 50, 100 y 200 m. Asimismo se obtuvieron perfiles de temperatura, salinidad y densidad con un CTD (temperatura, conductividad y presión). La distribución vertical de la temperatura en la bahía muestra claramente la influencia de los cambios estaciónales durante estas dos épocas. De acuerdo con los diagramas T-S durante primavera se registró Agua Intermedia del Pacifico (AIP), Agua Subsuperficial Ecuatorial (ASsSt) y Agua del Golfo de California (AGC). En otoño en los diagramas T-S se registró AIP, ASsSt, AGC y Agua Superficial Ecuatorial (ASE). En primavera se obtuvieron las mayores concentraciones de clorofila-a de 0,287 mg.m-3 y en otoño de 0,188 mg.m-3. La formación del máximo sub-superficial de clorofila fue una característica común de las aguas de la Bahía de La Paz durante el 2009, sin embargo quedan por investigar los procesos que determinan su forma y magnitud. Se concluye que los procesos hidrodinámicos presentes en la bahía y zona oceánica adyacente regulan, en gran medida la distribución de la clorofila-a.
    Description: With the purpose of determining the space-time variation in the formation of chlorophyll-a vertical structure and its variability in La Paz Bay and adjacent oceanic area, two cruises were carried out in April (spring) and September (autumn), 2009. To characterize the chlorophyll-a profiles, samples were taken by means of vertical oceanographic sounding at the surface and at 20, 50, 100 and 200 m deep. Moreover, profiles of temperature, salinity and density were obtained with a CTD (temperature, conductivity and pressure). The vertical distribution of temperature in the bay clearly shows the influence of seasonal changes during these two periods. In accordance with the TS diagrams for spring, it was registered Pacific Intermediate Water (AIP), Equatorial Subsurface Water (ASsSt) and Water from the Gulf of California (AGC). In autumn, TS diagrams registered AIP, ASsSt, AGC and Equatorial Surface Water (ASE). The highest concentrations of chlorophyll-a in spring was of 0.287 mg.m-3, and in autumn of 0.188 mg.m-3. The formation of the sub-surface chlorophyll maximum was a common feature of the waters in La Paz Bay in 2009. However, the processes that determine its shape and magnitude are yet to be investigated. It is concluded that the hydrodynamic processes present in the bay largely regulate chlorophyll-a distribution.
    Description: Published
    Keywords: Bahía ; clorofila ; oceanografía ; diagrama ; Bay ; oceanography ; distribution
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp. 48-55
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    Publication Date: 2021-05-19
    Description: En la actualidad, los programas de mercaje son necesarios para estudios de vital importancia en la biología de poblaciones, como los patrones de migración; ya que es un hecho aceptado desde hace casi un siglo que los peces pelágicos especialmente los clupeideos presentan un ciclo migratorio anual, lo que se manifiesta en la pesquería como cambios espaciales y temporales en las zonas de pesca, con las respectivas oscilaciones en la magnitud de sus capturas. Las técnicas de marcación también permiten evaluar la extensión de la distribución geográfica de una población, los patrones de migración, el número total de individuos de una población, sus parámetros de crecimiento y estim aciones de mortalidad.
    Description: Currently, programs are needed to mercaje critical studies in population biology, such as ”migration patterns” as it is an accepted fact for almost a century that pelagic fishes especially clupeideos present a migration cycle annually, which is manifested in the fishery as spatial and temporal changes in fishing areas, with the respective fluctuations in the magnitude of their catch. Marking techniques also to assess the extent of the geographical distribution of a population, migration patterns, the total number of individuals in a population, their growth parameters and mortality estimates.
    Description: Unpublished
    Keywords: Fish meal ; Engraulis ringens
    Repository Name: AquaDocs
    Type: Report , Refereed , Article
    Format: 87pp. & Figuras
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 4
    Publication Date: 2021-05-19
    Description: Las algas marinas han sido ampliamente estudiadas por investigadores del área de los productos naturales con el fin de encontrar agentes antitumorales y desarrollar nuevos agentes terapéuticos contra el cáncer. Los extractos crudos del alga roja marina Digenia simplex presentan un potente efecto antimitótico en líneas celulares cancerosas, por lo tanto es de suma importancia determinar las sustancias responsables de esta actividad. Para lograr este objetivo, se realizó un fraccionamiento cromatográfico del extracto etanólico de Digenia simplex guiado por evaluaciones de actividad antimitótica sobre la línea Jurkat (linfoma mieloide humano). Adicionalmente, se efectuó un ensayo de citotoxicidad de la fracción más activa obtenida. Para el fraccionamiento del extracto se utilizó cromatografía en columna con fase normal y cromatografía den capa delgada preparativa. Para el ensayo de citotoxicidad se utilizó el método de viabilidad celular por exclusión de colorante vital azul de tripano. Se obtuvo una fracción de naturaleza polar, que mostró actividad antimitótica y citotóxica. Esta fracción se comportó en forma similar al fármaco antineoplásico Colcemid.
    Description: Marie algae have been widely studied by natural products chemists in the search of antitumor agents and the developmente of new therapeutic agents aginst cancer. Extracts of the red alga Digenia simplex display a powerful antimitotic effect in cancer cell lines. Therefore, it is of extreme importance to determine what substances are responsible of this activity. In order to achieve this objective, the etanol extract of Digenia simplex was subject to chromatographic fractionation guided by evaluation of antimitotic activity on the Jurkat cell line (human myeloid lymphoma). Additionally, the most active fraction obtained was tested for cytotoxicity. Normal phase column chromatography and preparatory thin layer chromatography were used for extract fractionation. Cytotoxicity was assessed by cellular viability methods, determining cellualar viability by the exclusion of the vital dye trypan blue. A cytotoxic and antimitotic fraction of polar nature was obtained. This fraction behaveed in a similar way to the antineoplatic drug Colcemid.
    Description: Published
    Description: Digenia simplex, Red algae, Anti-tumor compounds, Jurkat cancer cell line, Chromatography
    Repository Name: AquaDocs
    Type: Journal Contribution
    Format: pp.109-117
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 5
    Publication Date: 2021-05-19
    Description: En Cuba, el turismo es uno de los principales renglones económicos, desarrollándose fundamentalmente el turismo de sol y playa. Las playas mejor potenciadas para el desarrollo turístico se distribuyen a lo largo de las costas exteriores del Archipiélago cubano, dentro de las que destacan las existentes en la cayería norte de Ciego de Ávila, donde se encuentra Cayo Paredón Grande. El estudio de las playas en esta cayería se concentra fundamentalmente en Cayo Coco. En este trabajo se determina el comportamiento anual de variables morfológicas y sedimentológicas con el procesamiento de 140 muestras de arena y 144 perfiles de playa, para establecer patrones de funcionamiento de las playas Los Pinos y Norte. Las variaciones morfológicas anuales que sufren estas playas responden a un comportamiento cíclico pero no estacional, modificándose estas según las variaciones en el régimen de viento-oleaje.
    Description: In Cuba, the tourism is one of the main economic lines; the main type of tourism that is developed is the one of sun and beach. The beaches better harnessed for the tourist development are distributed throughout the outer coasts of the Cuban Archipelago, within which are the existing ones in North cayería of Ciego de Ávila, where is Key Paredón Grande. The study of beaches in this cayería is concentrated fundamentally in Coco Key. In this work was determined the annual behaviour of morphologic and sedimentológical variables with the processing of 140 sand samples and 144 beach profiles, as well as establishing operation of beaches the Pines and North. The annual morphologic variations that undergo these beaches respond to a cyclical but no seasonal behaviour, modifying these according to the variations in the wind-surge regime.
    Description: Trabajo presentado en COLACMARCUBA celebrado en La Habana entre el 25 y 30 de octubre 2009
    Description: Published
    Description: comportamiento de playas, Cayo Paredón Grande, Beach behavior, Paredón Grande Key.
    Keywords: Beaches ; Beaches
    Repository Name: AquaDocs
    Type: Journal Contribution
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 6
    Publication Date: 2021-05-19
    Description: Las áreas protegidas en Colombia tienen como uno de sus objetivos la conservación de la biodiversidad. En relación con recursos hidrobiológicos, se constituyen en la fuente que alimenta las zonas aledañas, en donde las comunidades de pescadores deben realizar un aprovechamiento sostenible. Sin embargo, las presiones regionales traspasan los límites de las áreas, lo cual, sumado a las limitadas capacidades de control interinstitucional, han obligado a la búsqueda de diferentes estrategias para abordar el conflicto. En este sentido, Parques Nacionales Naturales de Colombia (PNNC), en el cumplimiento de su misión, inició un proceso que conducirá a la definición e implementación de acciones que contribuyan a la disminución de la presión sobre los recursos hidrobiológicos en las AP, siendo inicialmente una de ellas la caracterización de algunos elementos sociales y la presión ejercida por los pescadores en cinco AP del Caribe colombiano: Parque Nacional Natural (PNN) Tayrona, PNN Old Providence McBean Lagoon, PNN Corales del Rosario y San Bernardo, Santuario de Fauna y Flora Los Flamencos y Vía Parque Isla de Salamanca. Para desarrollar el estudio, se aplicó la metodología propuesta en el Sistema de Información Pesquera del Invemar (Sipein) en lo concerniente a la caracterización de la actividad. En total se encuestaron 1664 pescadores, de los cuales dependen 7545 personas directamente, siendo 29.3% menores de edad. Se observó que 40% de los pescadores alternan la pesca con otras actividades dentro de las áreas protegidas (guía turístico, lanchero, ayudante de buceo o vendedor ambulante) y fuera de ellas (agricultor, obrero de construcción o comerciante minorista). Se determinaron 63 lugares de procedencia de los pescadores, localizados en las zonas adyacentes a las áreas protegidas y circunscritos a cinco departamentos del Caribe. Se estimó que existen 1146 unidades económicas de pesca potenciales que usan las áreas protegidas. Se discute el papel que debe asumir PNNC y otras instituciones estatales y territoriales con el propósito de contribuir a la disminución de las presiones al interior de las áreas protegidas. Se recomienda la construcción de propuestas para el manejo de las áreas, elaboradas con participación de los administradores del recurso, investigadores, pescadores, académicos y entidades gubernamentales y no gubernamentales. Entre las propuestas que se recomiendan se mencionan: fortalecer el ejercicio de control y vigilancia, crear alternativas económicas por fuera de las áreas protegidas para los pescadores, generar redes de áreas protegidas y mantener los monitoreos sobre los recursos hidrobiológicos para validar el manejo.
    Description: Colombia’s protected areas have biodiversity preservation as one of their objectives. When dealing with hydrobiological resources, they become the source supporting nearby areas where fisheries communities should use them in a sustainable way. Nevertheless, regional stress go beyond areas’ boundaries which, added to the limited capabilities of institutional control, have forced to look for different strategies to face this conflict. In this context, the Colombian National Natural Park Authority (PNNC in Spanish) began the process looks for definition and implementation of actions for the recovery of aquatic resources, and initially outlined the characterization of some societal elements and the pressure on hydrobiological resources as fundamentals for the implementation of such a strategy in five protected areas in the Colombian Caribbean: Tayrona, Old Providence McBean Lagoon, Rosario and San Bernardo Corals, Floral and Faunal Sanctuary Los Flamencos, and Salamanca Island Way National Park. The methodology applied in order to implement this study was that proposed by Invemar’s Fishing Information System (Sipein in Spanish). A total number of 1664 fishermen were censed; they have 7545 dependent persons, 29.3% of them youngsters. It was observed that 40% of the fishermen alternate fishing with other activities within the protected areas (tourist guides, boatman, scuba aid, and seller) and outside them (farmer, construction worker, minor merchant). 63 places of origin adjacent to protected areas and circumscribed to five Caribbean Colombian provinces were determined for fishermen working in the protected areas. 1146 fishery economic unities potentially use protected areas. The role assumed by PNNC and other regional agencies aimed to minimize pressure within those protected areas is discussed. The construction of joint strategies involving resource managers, researchers, academics, government, and NGOs in the national, regional, and local levels is highly recommended. Elements to be considered in strategies are: prevent and control, economic alternatives outside of protected areas, and monitoring to validate the management. For the future, sustainable fishing in the region will depend upon a network of Marine Protected Areas along with other management measures to reduce fishing mortality.
    Description: Published
    Keywords: Protected areas ; Societal characteristics ; Hydrobiological resources ; Fishing pressure ; ASFA15::P::Protected areas ; ASFA15::R::Resources
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed
    Format: pp.277-306
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 7
    Publication Date: 2021-05-19
    Description: El presente estudio corresponde al levantamiento y análisis de la información biológica-pesquera de la temporada 2010 y la actualización de los indicadores históricos de la pesquería demersal austral (PDA) basada en las especies objetivo merluza del sur (Merluccius australis), congrio dorado (Genypterus blacodes), merluza de tres aletas (Micromesistius australis) y raya volantín (Zearaja chilensis) como también las especies secundarias como cojinoba moteada (Seriolella punctata) y cojinaba ploma (Seriolella punctata) y cojinoba ploma (Seriolelella caerulea). El área de operación de la flota comprende entre las latitudes 37° y 57°S, estableciendo para fines de administración pesquera una zona norte (41°28,6’-47°00’S) y una zona sur (47°01’-57°S) en aguas exteriores (Al oeste de la línea de base recta)
    Description: The present study is to survey and analysis of biological data and fishery of the 2010 season and updating the historical indicators of austral demersal fisheries (PDA) based on the target species in southern hake (Merluccius australis), golden eel (Genypterus blacodes) Southern blue whiting (Micromesistius australis) and kite line (Zearaja chilensis) as well as secondary species such as spotted warehou (Seriolella punctata) and Heermann cushions (Seriolella punctata) and Heermann warehou (Seriolelella caerulea). The area of ​​operation of the fleet between latitudes 37° and 57° S, for administration by establishing a northern fishing (41° 28.6 ’-47° 00’S) and south (47° 01’-57° S) in offshore waters (west of the straight baseline)
    Description: Unpublished
    Keywords: Merluccius australis ; Micromesistius australis ; Zearaja chilensis ; Seriolella caerulea ; Genypterus blacodes ; marine environment ; Benthic environment ; Pelagic fisheries ; Stock assessment ; Trap fishing ; Bathymetric data ; Biomass ; Age determination ; Size-at-age ; Length-weight relationships ; Spawning ; Salinity ; Recruitment
    Repository Name: AquaDocs
    Type: Report , Non-Refereed , Article
    Format: 193pp. & Anexos
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 8
    Publication Date: 2021-05-19
    Description: Con el fin de contribuir al conocimiento de la comunidad zooplanctónica, en particular de la sublcase Copepoda en las islas de Providencia y Santa Catalia (Caribe colombiano), se analizaron 47 estaciones en el mes de octubre de 2005 (época lluviosa). Se encontraron en total 42 especies pertenecientes a los órdenes Calanoida, Poecilostomatoida, Cyclopoida, Harpacticoida y Siphonostomatoida, de las cuales Clausocalanus arcuicornis, C. furactus, Calocalanus pavo, C. contractus, Pontella securifer, Lucicutia flavicornis, Subeucalanus mucronatus, Rhinaclanus cornutus, Pareucalanus sewelli, Centropages bradyi, Acartia tonsa, Lubbockia squillimana, Saphirella tropica, Euterpina sp. y Caligus sp., fueron nuevos registros para las islas. Su distribución espacial y abundancia estuvieron influenciadas principalmente por la entrada de la Corriente Ecuatorial del Caribe, el paso de los huracanes Wilma y Beta en el Caribe colombiano y la presencia de aguas terrígenas en el lado oeste de las islas.
    Description: In order to contribute to the zooplanktonic community knowledge, particularly the Copepoda subclass at Providence and Santa Catalina Islands (Colombian Caribbean), 47 zooplankton samples got in October 2005 (rainy season) were analyzed, 42 species from Calanoida, Poecilostomatoida, Cyclopoida, Harpacticoida and Siphonostomatoida orders were found. Clausocalanus arcuicornis, C. furcatus, Calocalanus pavo, C. contractus, Pontella secuifer, Lucicutia flavicornis, Subeucalanus mucronatus, Rhincalanus cornutus, Paracalanus sewelli, Centropages bradyi, Acartia tonsa, Lubbockia squillimana, Saphirella tropica, Euterpina sp. and Caligus sp. wre new records for the islands. The Caribbean Equatorial Current circulation, Wilma and Beta Hurricanes passing through the Colombian Caribbean and continental runoff on the west side of the island, were the principal factors affecting copepod abundances and spatial distribution.
    Description: Published
    Description: Copepods
    Keywords: Distribution ; Distribution ; Composition
    Repository Name: AquaDocs
    Type: Journal Contribution
    Format: pp.85-103
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 9
    Publication Date: 2021-11-10
    Description: The spatiotemporal variations of megazoobenthos on soft bottoms in Buena Vista (BV) and San Juan de Los Remedios (SJR) bays, Cuba, were assessed to infer the effects of the elimination of bottom trawl fisheries and the creation of protected areas. Data were collected at 11 sites in 2010-2013 (six routines and five exploratories) and 11 sites in 2014-2017 (four routines and seven exploratories). Samples were obtained by dredging. Mollusks were the most frequent and diverse group, followed by echinoderms and crustaceans. Total density (7.60 ind m-2) and biomass (15.82 g m-2) of the benthic community were highest in SJR in 2015. Although total biomass was lower at BV (t = 2.21; P = 0.032), there were no significant differences in density between bays (t = 0.77; P = 0.444). The site with a lower total density and biomass was located at BV. There were no differences between years except at one site, where density increased between 2010 and 2017. Total density and biomass were not significantly different inside and outside of the Zone Under Special Regime of Use and Protection (ZUSRUP) at the beginning of the sampled period. However, both density and biomass were significantly higher within the ZUSRUP at the end (2017), which suggests this protected area’s effectivity. The progressive increase in density at one site and greater density and biomass values at SJR, where bottom trawl fisheries were more intensive, suggest eliminating bottom trawl nets may have contributed to the benthic fauna recovery.
    Description: Published
    Description: Refereed
    Keywords: Megazoobenthos ; Trawl fishing ; Habitat quality ; Environmental impact ; Protected areas
    Repository Name: AquaDocs
    Type: Journal Contribution
    Format: pp.97-109
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 10
    Publication Date: 2022-05-04
    Description: A recent analysis of the Fermi Large Area Telescope data provided evidence for a high-intensity emission of high-energy gamma rays with a E 2 spectrum from two large areas, spanning 50 above and below the Galactic centre (the ‘‘Fermi bubbles’’). A hadronic mechanism was proposed for this gamma-ray emission making the Fermi bubbles promising source candidates of high-energy neutrino emission. In this work Monte Carlo simulations regarding the detectability of high-energy neutrinos from the Fermi bubbles with the future multi-km3 neutrino telescope KM3NeT in the Mediterranean Sea are presented. Under the hypothesis that the gamma-ray emission is completely due to hadronic processes, the results indicate that neutrinos from the bubbles could be discovered in about one year of operation, for a neutrino spectrum with a cutoff at 100 TeV and a detector with about 6 km3 of instrumented volume. The effect of a possible lower cutoff is also considered.
    Description: Published
    Description: 7–14
    Description: 1.8. Osservazioni di geofisica ambientale
    Description: JCR Journal
    Description: restricted
    Keywords: Neutrino telescope ; Fermi Bubbles ; KM3NeT ; 03. Hydrosphere::03.03. Physical::03.03.05. Instruments and techniques
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...