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  • Distribution  (24)
  • Geodesy
  • Instituto Oceanográfico de la Armada, Guayaquil, Ecuador  (25)
  • Springer  (1)
  • 2005-2009  (26)
  • 1950-1954
  • 2008  (26)
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  • 2005-2009  (26)
  • 1950-1954
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  • 1
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    Condiciones del plancton en una estación fija: Puerto El Morro-Playas, Golfo de Guayaquil, 2000-2002 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: En este estudio se examina la abundancia estructura poblacional y variación temporal del plancton, especialmente de copépodos en el Golfo de Guayaquil, a través de tres años de estudio, en condición no El Niño.
    Description: Changes on some oceanographic conditions as well surface planktonic community structure were studied during 33 months (December 1999- August 2002) at a fixed station in the Gulf of Guayaquil. Copepods, ostacods and decapod larvae were the most abundant zooplankton (300 µ mesh size) taxa, followed by fish larvae, chaetognaths, medusae, and mysidaceans. The lower abundance taxa were fish eggs, polychaeths, amphipods, pteropods, lamellibranch, cirriped larvae, and gasteropods. Phytoplankton was dominated by diatoms. The effect of the oceanographic variability on the zooplanktonic distribution, abundance, and population dynamics is unknown due to lack of appropriate continuity on sampling and analyses. The two most abundant copepod species were identified. Acartia danae dominated on the dry season, and Labidocera lubbocckii on the rainy season. Although, in general, copepod abundance was high, this diminished during the rainy seasons of 2000 (138-199 org/m3) and 2002 (175-327 org./m3), with relation to 2001 (1235-2238 org/m3). In march and april it was (6785 y 19887 org./m3). Ostracods, mainly Conchoecia sp., were relatively abundant (compared to copepods) and they were sometimes present in higher numbers. Decapods larvae were more abundand during the rainy season, specially in 2002. High abundance of copepods was find to be associated to lower water temperature, and decapod larvae, to higher temperatures. Diatoms were the main components of the phytoplankton community, with dominance of Skeletonema costatum, Coscinodiscus excentricus y Thalassiotrix frauenfeldii.
    Description: Incluye ref.bibl., grafs.
    Description: Published
    Keywords: Population structure ; Plankton ; Phytoplankton ; Distribution ; Zooplankton ; Diatoms ; Fish larvae ; Plankton ; Phytoplankton ; Abundance ; Distribution ; Zooplankton ; Marine crustaceans ; Fixed stations ; Population structure ; Diatoms ; Fish eggs ; Fish larvae
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 2
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    Presencia de Platasterias latiradiata Gray en aguas ecuatorianas (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: Se amplía la distribución biogeográfica de Platasterias latiradiata (Gray), hasta el Ecuador, considerada un fósil viviente, la que ha sido encontrada sólo en el Pacífico Litoral mexicano y centroamericano. En un mapa se da a conocer la nueva distribución, así como también un estudio comparativo de la morfología externa de una manera similar a los reportes y contribuciones de Caso, M, (1961, 1970, 1976). También se incluye una tabla con las medidas de algunas partes del cuerpo consideradas de importancia taxonómica y fotografías mostrando la predación de gasterópodos (Olivela semistriata) como uno de sus alimentos preferidos.
    Description: Incluye ref. bibl., ilus., maps., tbls.
    Description: Published
    Keywords: Distribution ; Taxonomy ; Biogeography ; Parasites ; Distribution ; Biogeography ; Parasites ; Taxonomy
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 3
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    Los eufáusidos en el mar ecuatoriano como indicadores de masas de agua, durante el crucero oceanográfico CO-II-99. Septiembre-octubre de 1999 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: Se analiza la distribución, abundancia relativa y composición de especies del orden Euphausiacea en el mar ecuatoriano, en el período septiembre-octubre de 1999 (CO-II-99). De un total de 25047 org/1000m³ se identificaron las siguientes especies Nyctiphanes simplex; Euphausia distinguenda; E. diomedeae; E. tenera; Stylocheiron sp., S. carinatum; S. longicorne; Nematoscelis sp., N. gracilis; N. tenella; Nematobrachion flexipes y Thysanopoda orientalis. La información biológica obtenida se correlaciona con las condiciones físicas del océano observadas durante el período de estudio. Se destaca la abundancia de Nyctiphanes simplex, en el área de influencia de la Corriente de Humboldt. La distribución de las especies propias de aguas tropicales y subtropicales como Euphausia diomedeae, E. distinguenda, E. tenera, Stylocheiron carinatum, S. longicorne; Nematobrachion flexipes, Nematoceslis gracilis, N. Tenella, guardan relación con las masas de agua reportadas. Se registró por primera vez la presencia de Thysanopoda orientalis y su incursion en esta región debe ser estudiada con mas detalle.
    Description: This study examines the distribution, relative abundance and composition of the order Euphausiacea species in the Pacific Ocean off the coast of the Galapagos Islands, from the period of September 1, 1999 through October 31, 1999. A total of 25,047 org/1000m³, the following species were identified: Nyctiphanes simplex; Euphausia distinguenda; E. diomedeae; E. tenera; Stylocheiron sp., S. carinatum; S. longicorne; Nematoscelis sp., N. gracilis; N. tenella; Nematobrachion flexipes and Thysanopoda orientalis. This research correlates biological information obtained from the physical conditions of the ocean observed during the period of the study. The abundance of Nyctiphanes simplex in the Humboldt Current is detected . The distribution of species characteristic of tropical and subtropical waters such as Euphausia diomedeae, E. distinguenda, E. tenera, Stylocheiron carinatum, S. longicorne, Nematocrachion flexipes, Nematoceslis gracilis, and N. Tenella, are in normal relationship with the reported water masses. The presence Thysanopoda orientalis is registered for the first time in the region of the Galapagos Islands, and its presence must studied very carefully.
    Description: Incluye ref.bibl., grafs.
    Description: Published
    Description: Krill
    Keywords: Distribution ; Indicator species ; Indicator species ; Water masses ; Distribution ; Abundance ; Composition ; Cruises ; Marine crustaceans ; New records
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  • 4
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    Los dinoflagelados como indicadores de "El Niño" en el mar ecuatoriano (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: En el presente trabajo se determina la distribución de los dinoflagelados por medio de un análisis cualitativo y de abundancia relativa, calculándose además de su diversidad. Se considera especies de dinoflagelados, indicadoras de los avances hacia el sur del agua cálida ecuatorial y de baja salinidad que apareció frente a las costas de Ecuador en Diciembre de 1972, año conocido como de "El Niño". Los resultados se relacionan con algunas condiciones hidrográficas coincidentes con la predominancia de los dinoflagelados. Así mismo se compara y se discuten estos antecedentes con la información disponible en relación a la presencia de otros organismos planctónicos típicos de aguas ecuatoriales y que también aparecieron durante Diciembre de 1972 en el mar ecuatoriano.
    Description: Incluye ref.bibl., ilus., tbls.
    Description: Published
    Description: Dinoflagelados, Fitomastigóforos
    Keywords: Distribution ; Phytoplankton ; Distribution ; Phytoplankton
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  • 5
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    Estudio de la comunidad fitoplanctónica en el estuario interior de Esmeraldas, Ecuador durante mayo de 2002 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: El presente trabajo tiene por finalidad determinar la composición, abundancia y distribution de las especies que se encuentran en los ríos de la ciudad de Esmeraldas.
    Description: The present investigation comprehended, three kinds of method: Chlorophyll a, cell count, cualitative analysis. That to contributed with ecology information about of phytoplankton community. These information were carry out in five area that included 31 stations in the internal stuary of the Esmeraldas city during on may of 2002. In the water example was identify 51 species and 87 species was observed in net 50 u. In the community of phytoplankton. The diatoms was dominant and the low concentration the dinoflagellates, cianobacters, clorophyta, euglenophyta and tintinnoids. In count cells was observed the dominant of Mesodinium rubrum and Thalassiosira subtilis in all area. However in examples of net (50u) was registered species typical of estuary environmental Chaetoceros affinis, Skeletonema costatum, Bacteriastrum elongatum, Pseudo-nitzschia paradoxa and reported the high abundance and diversity. These species presented a broad distribution and were dominan tipical of area.
    Description: Incluye ref.bibl., grafs., tbls.
    Description: Published
    Keywords: Phytoplankton ; Estuaries ; Distribution ; Chlorophylls ; Diatoms ; Species diversity ; Chlorophylls ; Phytoplankton ; Abundance ; Diatoms ; Species diversity ; Cell counters ; Estuaries ; Community composition ; Distribution
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  • 6
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    Composición y distribución de la biomasa del plancton en el frente ecuatorial (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: Este trabajo presenta los resultados de la distribución de la biomasa y composición del fitoplancton y zooplancton en el frente ecuatorial, cuya presencia caracteriza las condiciones consideradas como "normal" para el sistema de circulación oceánica del Pacífico Tropical.
    Description: Incluye ref.bibl., ilus.
    Description: Published
    Keywords: Distribution ; Biomass ; Phytoplankton ; Zooplankton ; Composition ; Distribution ; Biomass ; Cruises ; Phytoplankton ; Zooplankton
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  • 7
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    Determinación del datum vertical en La Libertad, Ecuador (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: Normalmente en los levantamientos geodésicos se utilizan dos tipos de referencias: las coordenadas de origen y el datum vertical: Las primeras están en función del elipsoide o superficie matemática de referencia que más se ajusta al área, y el segundo; por la determinación del nivel medio del mar con 19 años de observación. El Ecuador tiene como elipsoide de referencia, el Internacional y el datum horizontal del punto localizado en la Canoa, Venezuela (Provisional South American Datum 1956, PSAD 56), cuya coordenadas han sido transportadas a nuestro país mediante redes geodésicas. En 1948, el Ecuador instaló una estación mareográfica en la Libertad (Lat. 020° 12'S., Long. 80° 55'W) y a la determinación del datum vertical se refiere el presente trabajo.
    Description: Incl. ref.bibl., grafs.
    Description: Published
    Keywords: Geodesy ; Datum levels ; Geodesy
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  • 8
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    Distribución cuali-cuantitativa del fitoplancton en el Pacífico sureste (3°16'-31°23'S), durante El Niño 1997-1998 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: El objetivo del presente artículo es estudiar la distribución de las concentraciones de clorofila "a" y feopigmentos en diciembre/97 y marzo/98, y cuales serían los indicadores biológicos del fitoplancton que han avanzado con la corriente cálida hacia el sur en diciembre/97, en condiciones de El Niño 97-98, en el Pacífico sudeste exceptuando la región peruana (Fig.1).
    Description: During the VII Ecuadorian Expedition to Antarctic in the Guayaquil - Valparaíso - Guayaquil route (december/97 - march/98), oceanographic stations were performing to register cuali-cuantitative variations of phytoplankton of Southeastern Pacific Ocean during "El Nino" 1997-98 conditions. The biomass of phytoplankton is measured chlorophylls "a" levels showed lower concentrations between 0.015-04 mg/m³ to the 100m depth. The phytoplankton composition in december/97, registered the most dominance of diatoms at southward Gulf of Guayaquil with lower concentration at 20° S, the main species were Chaetoceros affinis, Skeletonema costatum, Rhizosolenia imbricata, Ch, leavis, R. alata var curvirrostris, Climacodium biconcavum, R. styliformis. The dinoflagellates species had the widest distribution in the area studied (3°16'-31°23'S) with rank of temperature between 27.54°C and 17.67°C, were Ceratium incisum, C. carriense, C. breve, C. teres, C. falcatiforme, C. euuarcuatum, C. pavillardi, Dinophysis caudata, Ornithocercus steinii, O. Thumi, O. magnificus, Pyrocystis fusiformis, Protoperidinium quarnerense, P. cf conicum, P. longipes, P. ocanicum, P. pedunculatum, Prorocentrum micans, Podolampas bipes, and some Epiplocides reticulata, Eutintinnus lusussundae, was indicators of oceanic waters advanced to chilean area. At to 30° S, the dinoflagellates were most dominant groups, with C. tripos, C. furca, C. pentagonum var subrrostrum, Goniodoma polyedricum, G. polygramma, species.
    Description: Incluye ref.bibl., grafs., ilus.
    Description: Published
    Keywords: Distribution ; Phytoplankton ; Biomass ; Diatoms ; Chlorophylls ; Distribution ; Phytoplankton ; Biomass ; Community composition ; Diatoms ; El Nino phenomena ; Oceanographic stations ; Chlorophylls
    Repository Name: AquaDocs
    Type: Journal Contribution , Non-Refereed , Article
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  • 9
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    Distribución del primer nivel trófico (fitoplancton) en el Pacífico ecuatoriano, período 1996-1997 (pre-El Niño) (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: Este artículo describe las condiciones bio-oceanográficas del primer nivel trófico, distribución y concentración de la biomasa fitoplanctónica (clorofila "a") y contajes celulares) a nivel superficial y subsuperficial de la capa fótica a los 75 m. de profundidad, se da la distribución de especies indicadoras del fitoplancton y su relación con las variables de temperatura y nutrientes, registrados en tres cruceros oceanográficos realizados en octubre/1996, abril-mayo/1997 y agosto/1997.
    Description: Published
    Keywords: Distribution ; Biomass ; Phytoplankton ; Trophic levels ; Chlorophylls ; Indicator species ; Distribution ; Biomass ; Chlorophylls ; Phytoplankton ; Indicator species ; El Nino phenomena ; Trophic levels ; Multiship expeditions
    Repository Name: AquaDocs
    Type: Journal Contribution , Non-Refereed , Article
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  • 10
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    Distribución del fitoplancton en la región costera del mar ecuatoriano, durante diciembre 2000 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: La presente investigación describe el comportamiento del primer nivel trófico (clorofila, feopigmentos, biomasa celular e indicadores del fitoplancton) en el ecosistema costero del mar ecuatoriano, conocer la incidencia de las principales especies que se encuentran formando núcleos de mayor productividad e inter-relacionadas con las condiciones ambientales durante el Crucero realizado en diciembre/2000.
    Description: This study was carried out during December 2000, onboard the R/V Orion of the Oceanographic Institute of the Ecuadorian Navy. The objetive was to establish the relationship between chlorophyll "a" content and the abundance of species or groups of species of micro-algae inside a region with ocean-climate system variability in the Tropical Pacific Ocean along the Ecuadorian coast. The highest chlorophyll content was found between 1°3 S and 3°S, with a positive correlation to the cellular biomass, including species of phytoplankton such as Rhizosolenia stoltherfothi, Thalassiosira subtiles, Pseudonitzschia delicatissima, P. longissima, Leptocylindrus danicus, Gymnodinium sp., y Messodinium rubrum. However, the biomass calculated from the content of the 55 µm mesh size was dominated by Rhizosolenia imbricata, T. subtiles, Chaetoceros affinis, L. danicus, Chaetoceros curvisetus. The dinoflagellates showed concentrations of species that characterized zones of warm water masses (Protoperidinium crassipes, Gonyaulax polyedra, Dinophysis caudata towards the NE, and C. tripos, G. polyedricum, C. furca towards the SE of the study area). The phytoplankton distribution did not reflect the position of the Equatorial Front, determined as an almost zonal phenomenon with a weak surface thermal gradient (23-25°C). The high abundances of M. rubrum and Gymnodinium sp., might have been related to the influence of the cold Humboldt Current and this may have produced some "red tide" events towards the coastal margin.
    Description: Incluye ref.bibl., grafs.
    Description: Published
    Keywords: Distribution ; Phytoplankton ; Biomass ; Chlorophylls ; Indicator species ; Distribution ; Phytoplankton ; Chlorophylls ; Biomass ; Indicator species ; Cruises
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  • 11
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    Composición, distribución y abundancia del plancton en el estuario de San Lorenzo, Esmeraldas - Ecuador (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: El presente trabajo es una contribución al estudio del plancton estuarino presente en el área comprendida del Canal de San Lorenzo, provincia de Esmeraldas, para lo cual existe poca información sobre este tema.
    Description: The present work comprehends the study of the qualitative and quantitative distribution of the phytoplankton, zooplankton and ichthyoplankton at San Lorenzo in Esmeraldas Province. For the effect 12 stations were established located at the Estero Chimbusal, Estero Nadadero, Canal de San Lorenzo. The sample was taken in the phases flow and refflux the days ist and 2nd of september 2001. There were identified 63 species in water samples and 77 species in samples with net of 50u in the community of the phytoplankton. The diatoms prevailed dominant and in smaller concentration the dinoflagellates, tintinnoids, cianobacters and flagellates. The cell biomass was represented by Messodinium rubrum and Chaetoceros compressus, they were the most abundant species in all the area. In net samples of 50u the dominant species were: Biddulphia sinensis, B.mobiliensis, Chaetoceros compressus, Pleurosigma angulatum and Skeletonema costatum, tytical of a high fertility in the area. The regimen refflux registered 17 taxas of zooplankton an the dominants were Copepods (35%), Chaetognaths (34%) and the Crustacean Larvae such as Zoeas of Brachyuran (11%). The regimen flow showed 14 taxas and were evident the Copepods (60%), Fish Larvae (21%) these groups of zooplankton were considered dominant and frequent. With regard to Ichthyoplankton registered in the regimen flow 3462 fish eggs/10m², the dominant families were Engraulidae (62%), Clupeidae (33%), however it was observed a high abundance of fish larvae with a total 11495/ 10m² and registered the dominant families Clupeidae (40%), Engraulidae (37%) and Scianidae (16%). The regimen refflux presented the biggest abundance on eggs of fish with 19649 eggs/ 10m². The dominant families were Clupeidae 68% and Engraulidae 31%, the fish larvae were low on abundance with 826 larvas/10m² being the dominant families Clupeidae (57%), Scianidae (24%) and Engraulidae (14%).
    Description: Incluye ref.bibl., grafs.
    Description: Published
    Keywords: Distribution ; Plankton ; Phytoplankton ; Zooplankton ; Biomass ; Diatoms ; Distribution ; Composition ; Abundance ; Plankton ; Phytoplankton ; Zooplankton ; Ichthyoplankton ; Diatoms ; Biomass
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  • 12
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    Estado actual del recurso malacológico (Bivalvos y gasterópodos) de la zona infralitoral del Golfo de Guayaquil (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: Del análisis de 144 muestras de sedimento (Tabla 1), obtenidas en seis (6) cruceros realizados en el Estero Salado y los canales de Cascajal, Jambelí y del Morro, así como al Oeste de la Isla Puná en el Golfo de Guayaquil (Fig.1); se identificaron 52 especies de moluscos vivos de los cuales 31 son bivalvos y 21 gasterópodos. Se da a conocer la distribución areal de las especies con sus principales características ecológicas, se relacionan con el tipo de sedimento, profundidad y hábitat para determinar los ecosistemas marinos, estuarinos y barreras ecológicas. Se encontró que las especies que podrían considerarse como posibles recursos de importancia económica y alimenticia en la Zona infralitoral estudiada son: Mytella strigata, Mytella guyanensis, Crassostrea columbiensis y anadara turberculosa. De las cuales M. strigata se presentó como la más abundante y con una distribución en forma de un gran parche en el Estero Salado Superior, en un ambiente estuarino. M. guyanensis y C. columbiensis se presentaron raros en la Zona Infralitoral, pero son más comunes y abundante en la Zona Mesolitoral y constituyen un importantísimo recurso alimenticio, que se lo debe cultivar y explotar racionalmente. En cuanto a Anadara tuberculosa fue encontrada solamente al Oeste de la Isla Puná en un ambiente con influencia de aguas oceánicas de mayor salinidad, en el Golfo de Guayaquil exterior. Se considera que ésta importante especie es poco común en el Golfo. La mayor diversidad se encontró en el Estero Salado Inferior y al Oeste de la Isla Puná donde predomina un sedimento arenoso y bien clasificado (Soledispa, 1987); mientras que la menor diversidad y mayor pobreza se la observó en los canales de Jambelí y Cascajal donde predomina el limo-arcilloso proveniente del Río Guayas, considerándose a este sedimento mal clasificado y leptocúrtico (Jácome y Llanos, 1987).
    Description: From the analysis of 144 benthic samples obtained on six cruises in the Estero Salado: the Cascajal, Jambelí and El Morro channel; also the West and South of Puna island in the Gulf of Guayaquil, were identified 52 species of living molluscks, 31 of which are Bivalvia and 21 are Gastropds. the areal distribution with the principal ecological characteristics are given and the relationship with the texture of sediment, depth, habitat are made for understanding the marine ecosystem and the ecological border. The species with economic importance that are living in the infra-littoral zone are Mytella strigata, Mytella guyanensis, Crassostrea columbiensis y Anadara tuberculosa; of which M. strigata was the most abundant with the great distribution in an estuarine environment. M. guyanensis and C. columbiensis are rares in the infra-littoral zone, because they have preference for living in the intertidal zone and are very important economic resource, that must culture. Anadara tuberculosa was found only to the west of Puna island and environment with marine influence in the Gulf of Guayaquil (External zone); this specie is considered no common. the highest diversity was found in the outer part of Estero Salado and the west of Puna island, where there is a sandy sediment very good classified (Soledispa, 1987). While the lower diversity and poorness were observed in the Jambelí and Cascajal channels, where there are muddy and fluvial sediments from the Guayas river. This sediment is good classified and leptocurtic (Jácome y Llanos, 1987).
    Description: Incluye ref.bibl., grafs., maps., tbls.
    Description: Published
    Keywords: Malacology ; Distribution ; Estuaries ; Species diversity ; Malacology ; Marine molluscs ; Check lists ; Cruises ; Distribution ; Species diversity ; Estuaries
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  • 13
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    Plancton alrededor de las Islas Galápagos durante el crucero oceanográfico efectuado en mayo de 2004 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: El presente trabajo comprende la composición y distribución del plancton en las Islas Galápagos. Para el efecto se establecieron 13 estaciones ubicadas en las secciones 92° - 90° y 89° W, realizadas en mayo del 2004.
    Description: The paper has reference of the composition and distribution of the species the phytoplankton and zooplankton around of Galapagos Islands. It was established 13 stations located in the sections folowing 92°-90° y 89° west, carry out during in may of 2004. It was identificated 58 species phytoplankton in water example and 70 species in net (50u). The diatoms were dominants and low concentration was registered the Dynoflagellates, Cocolitophorides, Silicoflagellates, Cianobacters, Tintinnoids. The cellular biomass were represented main the species Mesodinium rubrum y Gynodinium sp. that were the high abundance, coincidental with the species obtained of net example was registered Rhizosolenia hebetata and Thalassiosira subtilis that characteristic the most productivity in the sections 90° West and 1° sur. The zooplankton were registered 17 taxa of zooplankton representated the groups dominants the Copepods (35%), Chaetognaths (34%), and Zoeas of Brachiuras (11%) and it were frecuent around the Galapagos Islands. The species of chaetognathas was registered the dominance Sagitta enflata asociated S. pacifica with the hight density of individuals localizated in the section 90°W and 1° north in the surface. Aditionally it was registered the species Sagitta hexaptera determinance the hight abundance in the subsurface in the section 89°W between the 1° to 3° southeastern of the Galapagos Islands.
    Description: Incluye ref.bibl., grafs., ilus.
    Description: Published
    Keywords: Biomass ; Plankton ; Distribution ; Phytoplankton ; Zooplankton ; Diatoms ; Plankton ; Community composition ; Distribution ; Phytoplankton ; Zooplankton ; Diatoms ; Biomass ; Cruises
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  • 14
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    Distribución y enriquecimiento de metales traza en núcleos de sedimento de tres sistemas costeros del Estado de Sonora, México (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: Este trabajo tiene como objetivo principal, conocer el enriquecimiento y distribución de los metales traza y su relación con la materia organic y el tamaño medio de partícula (Mz) en la columna sedimentaria con el fin de determinar su acción e influencia ecológica en el medio ambiente marino.
    Description: Concentration of Ni, Cu, Pb, Mn y Fe, in sediment nuckeus of three lacunars of Sonora State, Mexico, were valued using methods of Absortion Atomic Spectrophotometry. established the existents relation between the concentration of named metals, organic matter contained and the granulometry with proposite of point the action or ecologic influence in acuatic environmental. The results suggest that resolution to distribution and form of studied metals, could be being transfered at the sediment by means of deposit of the organic material.
    Description: incluye ref.bibl., grafs., tbls.
    Description: Published
    Keywords: Distribution ; Organic matter ; Distribution ; Trace metals ; Sediments ; Inorganic matter ; Organic matter
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 15
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    Los eufáusidos en el Pacífico sudeste (03°16'S-31°23'S) durante el evento "El Niño", diciembre de 1997 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: El objetivo de este trabajo es establecer las especies de eufáusidos que caracterizan a las masas de agua en el Pacífico sudeste durante "El Niño 1997".
    Description: This study concerns the distribution, composition and relative abundance of euphausiids in the Southeastern Pacific Ocean, in december de 1997, during "El Niño conditions". Thirteen species were identified from approximately 1619 org/m³ and they are: Stylocheiron sp., S. carinatum; S. affine; S. elongatum, S. longicorne; Nematoscelis sp., N. microps; Nematobrachion flexipes; Euphausia eximia; E. tener; E. lamelligera; E. gibboides; E. distinguenda; E. diomedae y Nyctiphanes simplex. Eleven of the euphausiids live in epipelagic marine environment, and only two are mesopelagic. Sixty-nine percent of the species were located in their respective latitudinal zones (Brinton, 1962, Boltovskoy,1975; Cornejo de González, 1980, Antezana, 1981), excep: Euphausia eximia that normally is distributed between 40°N - 30°S; E. lamelligera between 25°N-10°S; E. distinguenda between 30°N-20°S,y E. diomedae between 25°N-25°S. These four species extended their southward distribution to 31°23?S, in waters with temperatures of 17.9°C and 11.6°C; and salinities of 34.4‰ and 34.6‰, from 0 and 200 m. de profundidad, respectively. This study demostrates the increased distribution of four species of euphausiids in the Southeastern Pacific Ocean during "El Niño 1997-1998".
    Description: Incluye ref.bibl., grafs., tbls.
    Description: Published
    Description: Krill
    Keywords: Distribution ; Zooplankton ; Species diversity ; Distribution ; Abundance ; Marine crustaceans ; El Nino phenomena ; Species diversity ; Zooplankton
    Repository Name: AquaDocs
    Type: Journal Contribution , Non-Refereed , Article
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  • 16
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    Distribución del nitrito en las aguas costeras ecuatorianas (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: Este trabajo fue realizado con el fin de analizar la distribución regional y vertical del nitrito máximo en relación con las características hidroquímicas y la posible existencia de un segundo máximo de nitrito en las aguas costeras del Ecuador, y está basado en los datos obtenidos a través de varios cruceros de investigación realizados por el Instituto Oceanográfico de la Armada del Ecuador (INOCAR) durante los años comprendidos entre 1973-1980.
    Description: Incluye ref.bibl., ilus.
    Description: Published
    Keywords: Distribution ; Nitrites ; Coastal waters ; Distribution ; Nitrites ; Coastal waters
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  • 17
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    Distribución de los foraminíferos bentónicos del Golfo de Guayaquil (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: Este trabajo sobre la distribución de los foraminíferos bentónicos del Golfo de Guayaquil, es el complemento de un estudio taxonómico realizado en la misma área, Gualancañay (1983). Durante la expedición científica "Eastwards/76. De acuerdo a los resultados de los análisis cualitativo y de abundancia relativa de las especies de foraminíferos bentónicos del Golfo de Guayaquil, demuestran que esta área pertenece al provincia zoogeográfica panameña propuesta por (Boltovskoy, 1965; Boltovskoy & Gualancañay, 1975; Boltovskoy, 1976; Gualancañay, 1978).
    Description: Incluye ref.bibl.,ilus., tbls.
    Description: Published
    Keywords: Benthos ; Distribution ; Taxonomy ; Zoogeography ; Distribution ; Foraminifera ; Zoogeography ; Benthos ; Taxonomy
    Repository Name: AquaDocs
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  • 18
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    Estudio sedimentológico y mineralógico de la plataforma continental ecuatoriana en el tramo comprendido entre Salinas y Ayampe (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: Esta investigación tiene como principal objetivo conocer como están distribuidos los sedimentos en el área, su origen, procedencia y su comportamiento en relación a los agentes de transporte y sedimentación que allí actúan.
    Description: Incluye ref.bibl., grafs., tbls.
    Description: Published
    Keywords: Mineralogy ; Distribution ; Sedimentology ; Mineralogy ; Distribution ; Sediment analysis
    Repository Name: AquaDocs
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  • 19
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    Estudio de la distribución y diversidad de los poliquetos bentónicos en las Islas Galápagos, Sept./Oct. de 1999 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: Esta investigación tiene como propósito el de identificar las especies de los poliquetos bentónicos y conocer la actividad biológica de estos organismos marinos en las diferentes bahías y puertos en el área del Archipiélago de Galápagos, con la finalidad de determinar la composción, distribución y abundancia de cada uno de ellos y sus asociaciones existentes en la zona estudiada, durante el segundo Crucero de la Armada del Ecuador a bordo del B7I "ORION" entre septiembre y octubre de 1999.
    Description: During the II Oceanographic Cruise accomplished by the Oceanografic Institute of the Navy of the Ecuador aboard B/I "ORION" between September and October of 1999, 11 sediment samples obtained with drag type Van Veen, were studied in the principal ports and bays of the Genovesa (Bay Darwin)), Floreana (Pto. Velasco Ibarra). St. Cristobal (Naufragio) Bay), Isabel (Pto. General Villamil) and Santa Cruz Islands (Academy Bay) of the Galapagos Islands, Ecuador. In this period of taking samples the temperature of the water of the sea oscillated between 20° C in the south part under study are and 25° C northward. The salinity between 33.9 and 34.7 ‰. A total of 11 families of poliquetos (bentonic) distributed in 12 genus and 12 especies were identified, being Boccardia tricuspa the most frequent species with 41.6%, followed by Capitella capitata, Glicera branchiopoda, Ophiodromus sp. and Pilargis sp. with 16.6%, the other species represent 1%. The Naufragio Bay (St. Cristobal) was the area of highest abundance of specimens with 59 organism. The most extense diversity of 6 species was found on the Isabel Island in sediment of sand.
    Description: Incluye ref.bibl., grafs.
    Description: Published
    Keywords: Benthos ; Distribution ; Aquatic communities ; Distribution ; Marine organisms ; Marine invertebrates ; Benthos ; Aquatic communities ; Biodiversity ; Composition ; Abundance ; Cruises ; Oceanic islands
    Repository Name: AquaDocs
    Type: Journal Contribution , Non-Refereed , Article
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  • 20
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    Variabilidad anual del fitoplancton marino en áreas costeras de La Libertad y Manta (Ecuador), su inter-relación con eventos El Niño (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: En este artículo se describen los resultados anuales de la biomasa fitoplanctónica cuantitativa (primer nivel trófico), períodos de mayor densidad fitoplanctónica anual en dos estaciones fijas de Manta (1991-1997), La Libertad (1994-1997) y su inter-relación en condiciones frías de 1996 y eventos cálidos El Niño en 1991-92 y 1997.
    Description: This paper describes the phytoplankton biomass composition and distribution (cell/l) in the surface and subsurrface levels, its seasonaly variability in two coastal station (ten miles offshore) in the south-eastern Pacific Ocean: Manta (1991 to 1997) with two event El Niño (1991-92; 1997); and La Libertad (1994 to 1997) with a event El Niño 1997. In this time its registered a could event during 1996 year. The highest concentration of phytoplankton 〉5x10 cell/l, its was present with the seasonal changes during winter to summer (april to may), and summer (june, july, august, september and october), its relationship with the termoclina position of 22-23°C. The less densities in this areas were present between the El Niño 1991-1992, to end 1995 and 1997 events. The phytoplankton was more representative neritic organisms to as Nitzschias, Chaetoceros, Rhizosolenias, Gymnodinium spp. and Oxytoxun spp., Messodinium rubrum, and microflagellates. In relationship of phytoplankton abundance during this study in Manta and La Libertad, registered different compositions: 1) Less phytoplankton biomass before El Niño 1991-1992; 2) Highest phytoplankton biomass before El Niño 1997.
    Description: Incluye ref.bibl., grafs., ilus.
    Description: Published
    Keywords: Distribution ; Biomass ; Phytoplankton ; Variability ; Distribution ; Biomass ; Phytoplankton ; El Nino phenomena
    Repository Name: AquaDocs
    Type: Journal Contribution , Non-Refereed , Article
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  • 21
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    Zooplancton en el estuario interior del Golfo de Guayaquil, durante mayo del 2001 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: Los objetivos del estudio son conocer la situación actual del zooplancton con la finalidad de conocer la composición, distribución y abundancia de las comunidades del zooplancton, resaltando las áreas de mayor productividad en el segundo eslabón de la cadena alimentaria. Establecer especies dominantes en la comunidad de quetognatos y su relación con los parámetros físicos en el estuario interior del Golfo de Guayaquil.
    Description: The present study reports in detail the distribution and composition of the zooplankton biomass in diferent places of the Gulf of Guayaquil and the main goal it is to know the areas of most productivity in the zooplankton. The most biomass of zooplankton was observed in the area of estuary Salado than in other areas in the study. The biomass was represented by microcrustacea the dominant group was Infra orden Brachiuran and it was observed the most at the station located in front of Quiñonez Island. The low zooplankton biomass was registered at the station located the area of the bridge ways around of Guayaquil city. The zooplankton community was represented by 17 taxa and 10 represented the Crustacea kind and it registered the most diversity at the estuary Salado and low diversity was observed at the bridge of ways around Guayaquil. The phylum Arthropoda showed a broad distribution and observed the abundance of insect larvae at Miraflores bridge it is not usually observed in the examples of zooplankton. The chaetognaths phylum showed that Sagitta bedoti was dominant and it may be considered a indicative changes on saltiness rate, in the area where the blend process between the Guayas River and Salado estuary happens.
    Description: Incluye ref.bibl., grafs.
    Description: Published
    Keywords: Biological production ; Estuaries ; Distribution ; Biomass ; Zooplankton ; Salinity ; Composition ; Distribution ; Biomass ; Zooplankton ; Salinity ; Abundance ; Biological production ; Estuaries ; Estuarine organisms
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  • 22
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    Larvas de peces clupeiformes y microzooplankton en la estación fija "La Libertad" desde noviembre de 1999 a julio del 2000 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: Uno de los principales objetivos es la evaluación de los impactos que los eventos de El Niño tienen en las poblaciones del ictioplancton, con especial referencia a huevos y larvas de especies de interés comercial. Para el efecto se utilizan también, a más de los datos oceanográficos, especies de foraminíferos planctónicos como indicadores del estado del ecosistema. En el presente documento se detalla la distribución de larvas de Sardinops sagax (sardina), Ophistonema sp., Cetengraulis mysticetus (chuhueco), Anchoa y Engraulis ringens (anchoveta) durante el primer semestre del año 2000.
    Description: The present paper is the result of the analysis of ichthyoplankton samples colected ten miles off shore from Salinas - Península Santa Elena, since november 1999 until july 2000. During this period it has been found two points of high secondary productivity: in subsurface waters ( 0-50 m depth) during may, and in surface waters during march. The biomass of microzooplankton, eggs and fish larvae Engraulidae and Clupeidae were found in high quantity in these months mainly between the 0-50 m depth. The interrelation among planktonic foraminifers species: Globigerina bulloides, Globigerinoides ruber, Globigerinella aequilateralis, G. menardii, G. dutertrei and G. sacculifer, characterized the surface equatorial waters with the influence of cold waters of the Humboldt Current during this study, specially in march. Fish larvae like Anchoa sp., Anchovia (anchoa), Engraulis ringens (anchoveta) y Cetengraulis mysticetus (chuhueco), were identify since march to july. C. mysticetus was the most abundant specie. High diversity of zooplankton and fish larvae E. ringens and Opisthonema sp. (pinchagua) ocurred in may of 2000 also.
    Description: Incluye ref.bibl., grafs., tbls.
    Description: Published
    Keywords: Biological production ; Biomass ; Zooplankton ; Distribution ; Environmental impact ; Fish larvae ; Ichthyoplankton ; Biological production ; Biomass ; Zooplankton ; Distribution ; Fish eggs ; Fish larvae ; El Nino phenomena ; Environmental impact ; Fixed stations
    Repository Name: AquaDocs
    Type: Journal Contribution , Non-Refereed , Article
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  • 23
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    Estudio de las comunidades del fitoplancton en los Ríos Daule, Guayas y Estero Salado (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: El objetivo del presente estudio es evaluar la biomasa, diversidad y relación del fitoplancton con las comunidades planctónicas estuarinas basándose en las condiciones ambientales durante la época de verano.
    Description: The principal objective was to know the distribution of chlorophyll, cell counts and qualitative (net 50µ) on the community of the phytoplankton accomplished in five profiles around of the city of Guayaquil (estuary interior) between 8th and 14th of may/2001. There were identified 87 species in water samples and 110 species in net samples (50µ), in the community of the phytoplankton. The diatomms prevailed dominant and in smaller concentration the dinoflagellates, tintinnoids, silicoflagellates, cianobacters and flagellates. In cell counts Pseudonitzschia longissima y Skeletonema costatum, they were the species of greater concentration in all the area. In net samples (50µ), were registered species stuarines and benthics: Polymixis coranalis, Actinoptychus splendes, Chaetoceros affinis, to report a height variability and abundance of species. The distribution and dominance of species presented a which one characteristic for the area.
    Description: Incluye ref.bibl., grafs.
    Description: Published
    Keywords: Phytoplankton ; Distribution ; Biomass ; Rivers ; Environmental factors ; Summer ; Chlorophylls ; Species diversity ; Phytoplankton ; Distribution ; Chlorophylls ; Species diversity ; Biomass ; Rivers ; Salt marshes ; Environmental factors ; Summer ; Cell counters
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  • 24
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    Distribución de los foraminíferos bentónicos del Golfo de Guayaquil interior y su relación con algunos factores ambientales (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: En la presente investigación se realiza el estudio de algunos factores ambientales: salinidad del agua superficial, turbidez, sedimentos y pH del sedimento, relacionados con las especies de foraminíferos bentónicos identificadas en el Golfo de Guayaquil, durante marzo y septiembre de 1988. Igualmente se realiza la distribución relativa de cada una de las especies halladas en el área.
    Description: Incluye ref.bibl., grafs., tbls.
    Description: Published
    Keywords: Distribution ; Environmental factors ; Distribution ; Foraminifera ; Environmental factors
    Repository Name: AquaDocs
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  • 25
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    Macrofauna bentónica en la zona intermareal y submareal en Caleta Aeolian, Isla Baltra (Galápagos, Ecuador) (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: Esta investigación tiene como propósito identificar y dar a conocer las especies de marco invertebrados bentónicos más comunes del área de la Caleta de Aeolian, Isla Baltra del Archipiélago de Galápagos, y conocer la actividad biológica de estos organismos marinos en la zona intermareal y submareal con la finalidad de determinar la composición, distribución y abundancia de cada uno de ellos y sus asociaciones existentes en la zona estudiada, como un marco referencial futuro que nos permita conocer los cambios para evaluar el impacto ambiental que puedan tener los hábitat de estos invertebrados marinos.
    Description: Of the analysis of 14 stations in the subtidal zone in Aeolian Creek, Galápagos Islands, 9 species of mollusks were identified, being the species most abundant Pitar helenae. The polichaetos were few frequent represented by the species Nereis sp. of the Nereidae family, Glycera sp. of the Glyceridae family, Nepthys sp. of the Nepthyidae family and Diopatra tridentata of the Onuphidae family. In the intertidal zone the results of the analysis of the 7 macrobentónicas samples 24 species in total of invertebrates and one species of macro-alga Padina durvillea were identified. In the rocky zone the bivalvia Brachiodontes adamsianus and Sipunculidos they are the specimens more abundant. The polichaetos appear with low diversity being Bocardia tricuspa the species more abundant, but of the same way the genus Dasybranchus sp. and Aphrodita parva. The most frequent crustaceans on the rocks is represented by Grapsus grapsus and few frequent Oxius verreauxii, Porcellana sp., Calcino sp. (Ermitaño) and in the sand Ocypode gaudichaudii. A table with values of relative frequency appears and figures with the percentage abundance of the identified species.
    Description: Incluye ref.bibl., ilus., tbls.
    Description: Published
    Keywords: Distribution ; Benthos ; Intertidal environment ; Microorganisms ; Microorganisms ; Abundance ; Marine organisms ; Community composition ; Distribution ; Marine invertebrates ; Benthos ; Intertidal environment
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  • 26
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    VLNDEF Project for Geodetic Infrastructure Definition of Northern Victoria Land, Antarctica (2008)
    Springer
    Details
    Publication Date: 2022-05-30
    Description: Scientific investigations in Antarctica are, for many different reasons, a challenging and fascinating task. Measurements, observations and field operations must be carefully planned well in advance and the capacity of successfully meeting the goals of a scientific project is often related to the capacity of forecasting and anticipating the many different potential mishaps. In order to do that, experience and logistic support are crucial. On the scientific side, the team must be aware of its tasks and be prepared to carry out observations in a hostile environment: both technology and human resources have to be suitably selected, prepared, tested and trained. On the logistic side, nations, institutions and any other organisation involved in the expeditions must ensure the proper amount of competence and practical support. The history of modern Italian Antarctic expeditions dates back to the middle 80’s when the first infrastructures of “Mario Zucchelli Station”, formerly Terra Nova Bay Station, were settled at Terra Nova Bay, Northern Victoria Land. Only a few years later, the first geodetic infrastructures were planned and built. Italian geodetic facilities and activities were, ever since, being constantly maintained and developed. Nowadays, the most remarkable geodetic infrastructures are the permanent Global Positioning System (GPS) station (TNB1) installed at Mario Zucchelli and the GPS geodetic network Victoria Land Network for DEFormation control (VLNDEF) entirely deployed on an area extending between 71° S and 76° S and 160° E and 170° E. These facilities do not only allow carrying out utmost geodetic investigations but also posses interesting capacities on the international multidisciplinary scientific scenario. In order to fully exploit their potentiality, management and maintenance of the infrastructure are crucial; nevertheless, in order to perform high quality scientific research, these abilities must be coupled with the knowledge concerning a proper use and a correct processing of the information that these infrastructures can provide. This work focuses on the different methods that can be applied to process the observations that are performed with GPS technique in Northern Victoria Land, aiming at reaching the highest accuracy of results and assuring the larger significance and versatility of the processing outcomes. Three software were used for the analysis, namely: Bernese v.5.0, Gipsy/Oasis II and Gamit/Globk. The working data sets are (i) the permanent GPS station TNB1 observations continuously performed since 1998 and (ii) the five episodic campaigns performed on the sites of VLNDEF. The two infrastructures can be regarded as neat examples of standard geodetic installation in Antarctica. Therefore, the technological solutions that were adopted and applied for establishing the GPS permanent station and the VLNDEF geodetic network as well as the data processing strategies and the data analysis procedures that were tested on their observation will be illustrated in detail. The results will be presented, compared and discussed. Furthermore, their potentials and role in geodetic research will be carefully described; their versatility will also be highlighted in the foreground of a multidisciplinary Antarctic international scientific activity.
    Description: Published
    Description: 37-72
    Description: 1.8. Osservazioni di geofisica ambientale
    Description: reserved
    Keywords: Antarctica ; Geodesy ; Geodetic Infrastructures ; GPS ; 01. Atmosphere::01.01. Atmosphere::01.01.08. Instruments and techniques
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: book chapter
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