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  • Phytoplankton  (47)
  • Internal waves  (46)
  • Instituto Oceanográfico de la Armada, Guayaquil, Ecuador  (40)
  • American Meteorological Society  (38)
  • John Wiley & Sons  (15)
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  • 1
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    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Publikationsdatum: 2021-05-19
    Beschreibung: Esta investigación es parte del Proyecto Indicadores Biológicos de diferentes ecosistemas marinos del Ecuador, correspondiente a la región Insular de Galápagos durante agosto 2000, con el propósito de comprender la dinámica poblacional del fitoplancton (cuali-cuantitativo) de las diferentes masas de agua que afloran al este y oeste de Galápagos y entre las islas enfocando áreas de mayor fertilidad marina en la época seca.
    Beschreibung: This study corresponds to the cruise around the Galapagos Islands carried out by the Oceanographic Institute of the Ecuadorian Navy in August 2000. The purpose was to understand, quantitatively and qualitatively, the ecological dynamics of the phytoplankton during the dry season. The chlorophyll "a" data from surface waters registered high concentrations (0.87 - 2.18 mg/m3) southwest off the Galapagos Islands, reflecting upwelling processes. Sub-surface-water values were higher southward, while the lowest values were found to the north. Nuclei of high chlorophyll "a" content were found to the southwest of the Galapagos (10 m), and to the southeast (40-50 m). The cellular biomass was represented by P. delicatissima, species responsible for the high fertility in the center of the upwelling area and to the southwest and south off the Galapagos, Thalassiosira subtilis and Gymnodinium sp. were dominant to the east. The incidence of the Cromwell Current was accented toward 91° and 92°W; toward 89°W different conditions were shown, probably associated to the influence of the Humboldt Current. The biomass in 55µm mesh size fraction was dominated by P. delicatissima (0 m); P. delicatissima, C. compresus and C. curvisetus ( 0 - 50 m). C. tripos and G. polyedra, warm water species dominated to the north off the Galapagos in surface waters, while in sub-surface waters these species dominated to the southeast. This atypical behaviour was observed during the cruise of May 2000, when upwelling conditions were not evident.
    Beschreibung: Incluye ref.bibl., grafs.
    Beschreibung: Published
    Schlagwort(e): Phytoplankton ; Biomass ; Chlorophylls ; Marine ecology ; Population dynamics ; Phytoplankton ; Chlorophylls ; Biomass ; Upwelling ; Marine ecology ; Water masses ; Population dynamics ; Cruises ; Oceanic islands
    Repository-Name: AquaDocs
    Materialart: Journal Contribution
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
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    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Publikationsdatum: 2021-05-19
    Beschreibung: 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.
    Beschreibung: 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.
    Beschreibung: Incluye ref.bibl., grafs.
    Beschreibung: Published
    Schlagwort(e): 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
    Materialart: Journal Contribution
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
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    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Publikationsdatum: 2021-05-19
    Beschreibung: This research is part of an environmental monitoring of plankton and its physical and chemical response around the platform located offshore Campo Amistad, near Santa Clara Island, southeast of the Gulf in external Guayaquil. The study was carried out between july 30 and augut 31-2001, onboard the R/V Orión of the Oceanographic Institute of the Ecuadorian Navy. The chlorophyll "a" biomass presented values between 0.6 and 1.52 mg/m3 in surface waters, with averages of 1.07 to 0.99 mg/m3 (10 m), 0.79 (20 m) and 0.58 (30 m) mg/m3. The larger amounts of biomass and daily variability were found in the northern part of the platform, while the opposite trend was observed in its western area. One hundred and three phytoplankton species were identified, with dominance of centric diatoms of mainly Skeletonema costatum and Chaetoceros curvisetus. Dinoflagellates presented high diversity and low biomass; Ceratium dens was the dominant species, characterizing influences of external water masses in the estuary. The zooplankton fauna was represented by 28 groups, with dominance of cladocera and copepods; the highest density of organisms was found around the 17h00 hours. High density of Cladocera presented a strong positive relationship to phytoplankton abundance, and a negative correlation to copepod abundance. The environmental conditions in the surface thermal structure were almost stable, with an average of 22.5°C. The lowest temperatures were found southwest of the platform (subsurface), coincident with a slight increase in nutrients (nitrate and silicate). The marine biota associated with these environmental conditions presented high diversity, implying the absence of eutrophication incidence in the estuary area of the platform.
    Beschreibung: Esta investigación es parte de un monitoreo sobre la situación ambiental del plancton y sus condiciones ambientales alrededor de la plataforma Amistad de Producción de Gas ubicada en el campo Amistad cerca de la Isla Santa Clara (Sureste del Golfo de Guayaquil externo), realizada entre el 30 de julio al 3 de agosto de 2001, abordo del B/I ORION del Instituto Oceanográfico de la Armada del Ecuador con un total de 12 estaciones. La biomasa clorofila "a" presentó valores superficiales entre 0.6-1.52 mg/m3, con promedios de 1.05 (10m), 0.79 (20m) y 0.58 (30m) mg/m3, la mayor biomasa y variabilidad diaria fue hacia el norte de la plataforma, ocurriendo lo contrario hacia el oeste. Se identificaron 103 especies fitoplanctónicas, con dominancia de diatomeas centricas principalmente por Skeletonema costatum y Chaetoceros curvisetus. Los dinoflagelados presentaron la mayor diversidad de especies y baja biomasa, Ceratium dens fue la especie dominante, caracterizando influencias de masas de aguas externas en el estuario. El zooplancton estuvo representado por 28 grupos, siendo dominantes cladóceros y copépodos; la mayor densidad de organismos fue hacia las 17h00 horas. La mayor densidad de cladóceros presentó una estrecha relación con la abundancia del fitoplancton, y los copépodos con su menor abundancia. Las condiciones ambientales en la estructura térmica superficial se presentaron casi estables entre 22.5°C, las menores fueron hacia el sudoeste de la plataforma (subsuperficial) coincidente con el ligero aporte de nutrientes (nitrato y silicato). Bajo estas condiciones se puede mencionar que en el entorno de la plataforma, la biota marina presentó gran variabilidad y no se registró incidencia de eutroficación.
    Beschreibung: Incluye ref.bibl., grafs.
    Beschreibung: Published
    Schlagwort(e): Phytoplankton ; Chlorophylls ; Biomass ; Zooplankton ; Environmental assessment ; Producttion platforms ; Nutrients (mineral)
    Repository-Name: AquaDocs
    Materialart: Journal Contribution , Non-Refereed , Article
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
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    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Publikationsdatum: 2021-05-19
    Beschreibung: Los objetivos del presente estudio son:- Establecer el estado actual del plancton en el estero Santa Rosa, estero Jambelí y río Jubones durante las fases de flujo y reflujo. - Determinar la productividad, dominación y diversidad del plancton presentes en el área de estudio.
    Beschreibung: During the study was colected samples water on superficial at 27 stations, it was distributed in the Port Bolívar stuary with maing goal it to know primary productivity. the samples of plankton was colected in two phases: flux and reflux during the days 3 to 18 of july-2002. The diversity phytoplankton was identified to method Uthermohl 88 species in the lawyer superficial and 96 species were determined in samples net of 50u. In the phytoplankton community the diatoms were dominant and lower concentration the dinoflagellates, silicoflagellates, cyanobacter and cocolithophorides. In cell count the species the most dominant at the area were Skeletonema costatum and Pseudonitzschia delicatissima, in the net (50u) samples were registered the stuarine and benthic species: Skeletonema costatum, Cyclotella menenghiniana. It was destacated that the most phytoplankton diversity found in the areas river Jubones and the Santa Rosa stuary during the phase flux. The zooplankton community was registered hight diversity of groups zooplanktonic with a total of 32 and 28 taxa during flux and reflux respectivetly and terms of diversity max was registered a 2.19 bits found in the estero Jambelí. The high biomas of zooplankton it was observed during reflux in the station 14 and the lower biomas. It was found during flux in the station 5 localited in the estero Santa Rosa. The ichthyoplankton was registered low abundance of eggs and lavals of fish in the study area, and determinated. The number max of diversity were 0.8 bits observed in the area Punta Jambelí and determinated in the group of eggs of fish the following familys: Clupeidae, Sciaenidae, Engraulidae and the larval of fishes the dominant family was Engraulidae.
    Beschreibung: Incluye ref. bil., grafs.
    Beschreibung: Published
    Schlagwort(e): Biological production ; Plankton ; Phytoplankton ; Zooplankton ; Biomass ; Species diversity ; Species diversity ; Biological production ; Plankton ; Phytoplankton ; Zooplankton ; Biomass
    Repository-Name: AquaDocs
    Materialart: Journal Contribution
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
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    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Publikationsdatum: 2021-05-19
    Beschreibung: El presente trabajo trata de la distribución de la abundancia de huevos y larvas de peces en relación con la abundancia del zooplancton y fitoplancton colectado en 13 estaciones muestreadas a bordo del B/I TOHALLI durante el crucero pelágico-oceanográfico realizado en abril de 1995. Se analizó un total de 12820 huevos de peces. (10m²)¹ y 5145 larvas de peces (10m²)¹. La mayor abundancia de huevos y larvas de peces se localizó al este de las Islas Galápagos, en las estaciones 1P y 10, situadas en los extremos norte y sur del área de muestreo a la altura de la Isla San Cristóbal, con 5226 huevos (10m²)¹ y 1042 larvas (10m²)¹, respectivamente, mientras que la menor abundancia se localizó también al este de la Islas Galápagos, en las estaciones 7 y 5 con 109 huevos (10m²)¹ y 87 larvas (10m²)¹, respectivamente, y en las estaciones localizadas en el meridiano 83° W, frente a las provincias del Guayas y Manabí, con menos de 100 larvas (10m²)¹. Se reporta la presencia de larvas de Sardinops sagax en las estaciones cercanas a la Isla San Cristóbal. Huevos de Scomber japonicus y de engráulidos se identificaron cerca de esta isla. La familia ENGRAULIDAE se ausentó en el meridiano 83° W. Se identificaron larvas de peces pertenecientes a 17 familias, de las cuales, la familia MYCTOPHIDAE y GONOSTOMATIDAE fueron las más abundantes, representaron el 39% y 22% del total de larvas, respectivamente. Las áreas de abundancia de huevos y larvas estuvieron relacionadas con áreas de riqueza fito y zooplanctónica. Las mayores concentraciones de fitoplancton en aguas superficiales, más de 170000 células.m³, se dieron al este de Galápagos. Las menos concentraciones de fitoplancton se dieron en cambio a la altura del Golfo de Guayaquil, con 5000 células m³, lugar donde prosperó el zooplancton tanto en superficie como en profundidad, con 1800 y 2800 organismos.m³, respectivamente. Siguió en abundancia de zooplancton la zona norte de la Isla San Cristóbal tanto en superficie como en aguas profundas.
    Beschreibung: Incluye ref.bibl.,ilus.
    Beschreibung: Published
    Schlagwort(e): Phytoplankton ; Zooplankton ; Fish larvae ; Abundance ; Ichthyoplankton ; Phytoplankton ; Zooplankton ; Cruises ; Fish eggs ; Fish larvae
    Repository-Name: AquaDocs
    Materialart: Journal Contribution
    Standort Signatur Erwartet Verfügbarkeit
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  • 6
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    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Publikationsdatum: 2021-05-19
    Beschreibung: El objetivo del presente estudio es conocer la distribución cualitativa y cuantitativa de las especies del fitoplancton, zooplancton e ictioplancton y su relación con las condiciones ambientales durante el período en estudio.
    Beschreibung: The present work includes/understands the study of the qualitative and quantitative temporary variability of the phytoplankton, zooplankton and ichthyoplankton in the shores of the Santay Island, of the Province of the Guayas. For the effect 16 samples, obtained during november of the 2000 and january of the 2002 were analyzed. 38 species of phytoplankton in water samples and 51 species in network samples were identified (50u). The diatoms were dominant and in smaller concentration the dinoflagellates ones, cianobacterys, silicoflagellates, and tintinides. The cellular biomass was represented mainly by Skeletonema costatum, Paralia sulcata and Coscinodiscus excentricus, species that were abundant in the study area. In network samples species were observed estuarys and benthicas: Actinoptychus senarius, Coscinodiscus excentricus, C. concinnus, Polymixus coronalis, Cyclotella menenghiniana, characteristic of a high fertility. During year 2000 a smaller zooplanctónica biomass with a variability in the abundance of the main groups of zooplancton appeared, standing out the dominant group the Larvae of Fish and represented by the sort Anchovy sp. and its temporary abundance is influenced mainly by the seasonal time, physical factors and states of tides. Wheres during year 2002 a greater zooplanctónica biomass was observed and greater diversity of species, this biomass was represented mainly by microcrustaceans such as Nauplios of cirripedios, Copépodos, Zoeas of brachiuras, Copépodos, Larvae of fish and Larvae of poliquetos, in comparison with year 2000. The abundance of a fraction of some groups of zooplankton pertaining to meroplancton is an index that mainly characterizes productive areas by the presence of larval estadíos of crustaceans and fish.
    Beschreibung: Incluye ref.bibl., grafs., ilus.
    Beschreibung: Published
    Schlagwort(e): Plankton ; Phytoplankton ; Zooplankton ; Biomass ; Biological production ; Species diversity ; Marine ecology ; Species diversity ; Plankton ; Phytoplankton ; Zooplankton ; Ichthyoplankton ; Biomass ; Abundance ; Biological production ; Marine ecology ; Temporal variations
    Repository-Name: AquaDocs
    Materialart: Journal Contribution
    Standort Signatur Erwartet Verfügbarkeit
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  • 7
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    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Publikationsdatum: 2021-05-19
    Beschreibung: En el presente artículo se va a referir principalmente a los eventos de Marea Roja (MR) registrados entre 1989-1999 (Fig. 1y2).
    Beschreibung: Some Red Tides were reported during the last decade (1989-1999) in Ecuadorian waters, these observed during coastal monitorings and cruises oceanographic, and they migth have a relationship to coastal oceanographic aspects. The Red Tides are of world occurrence, in Ecuador they appeared with high frequency in the Gulf of Guayaquil (Canal de Jambelí, Estero Salado, Puná Island and Río Guayas), but they have been also evidenced to the south of the Peninsula Santa Elena, Manglaralto, Manta, Cojimíes and in the Galapagos Islands. Their highest occurrence was in February and March, another one in April, June, September and November. During El Niño event, the marine fertility decreases when warm water masses arrive with a low dominance of dinoflagellates. This organisms can caused red tide especially in the Gulf of Guayaquil. Red tide events were caused specially by the dinoflagellates and ciliates their species have been Cochlodinium catenatum, Cochlodinium sp., Gymnodinium splendens, Gonyaulax monilata, Gonyaulax spp., Gymnodinium spp., Gyrodinium striatum, Noctiluca scentillans, Prorocentrum sp., Prorocentrum maximun, Scrippsiella trochoidea, Ceratium gibberum, Ceratium deflexum, Mesodinium rubrum, giving discoloraciones yellowish and reddish coffee; but there has also been diatomeas with yellow staions - greenish as Skeletonema costatum, Coscinodiscus sp., Chaetoceros affinis, C. curvisetus; and due to whitish to masses of jellyfishs.
    Beschreibung: Incluye ref.bibl., ilus., tbls.
    Beschreibung: Published
    Schlagwort(e): Phytoplankton ; Public health ; Red tides ; Phytoplankton ; Public health
    Repository-Name: AquaDocs
    Materialart: Journal Contribution
    Standort Signatur Erwartet Verfügbarkeit
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  • 8
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    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Publikationsdatum: 2021-05-19
    Beschreibung: 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.
    Beschreibung: Incluye ref.bibl., ilus., tbls.
    Beschreibung: Published
    Beschreibung: Dinoflagelados, Fitomastigóforos
    Schlagwort(e): Distribution ; Phytoplankton ; Distribution ; Phytoplankton
    Repository-Name: AquaDocs
    Materialart: Journal Contribution
    Standort Signatur Erwartet Verfügbarkeit
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  • 9
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    Unbekannt
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Publikationsdatum: 2021-05-19
    Beschreibung: 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.
    Beschreibung: 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.
    Beschreibung: Incluye ref.bibl., grafs., tbls.
    Beschreibung: Published
    Schlagwort(e): Phytoplankton ; Estuaries ; Distribution ; Chlorophylls ; Diatoms ; Species diversity ; Chlorophylls ; Phytoplankton ; Abundance ; Diatoms ; Species diversity ; Cell counters ; Estuaries ; Community composition ; Distribution
    Repository-Name: AquaDocs
    Materialart: Journal Contribution
    Standort Signatur Erwartet Verfügbarkeit
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  • 10
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    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Publikationsdatum: 2021-05-19
    Beschreibung: 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.
    Beschreibung: Incluye ref.bibl., ilus.
    Beschreibung: Published
    Schlagwort(e): Distribution ; Biomass ; Phytoplankton ; Zooplankton ; Composition ; Distribution ; Biomass ; Cruises ; Phytoplankton ; Zooplankton
    Repository-Name: AquaDocs
    Materialart: Journal Contribution
    Standort Signatur Erwartet Verfügbarkeit
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