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  • Abundance  (20)
  • Internal waves
  • Instituto Oceanográfico de la Armada, Guayaquil, Ecuador  (22)
  • Elsevier B.V.  (1)
  • Oxford University Press  (1)
  • American Meteorological Society
  • 2005-2009  (24)
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Keywords
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Years
Year
  • 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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    Abundancia y distribución del ictioplancton, fito y zooplancton en el mar ecuatoriano en abril de 1995 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: 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.
    Description: Incluye ref.bibl.,ilus.
    Description: Published
    Keywords: Phytoplankton ; Zooplankton ; Fish larvae ; Abundance ; Ichthyoplankton ; Phytoplankton ; Zooplankton ; Cruises ; Fish eggs ; Fish larvae
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 3
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    Aspectos ecológicos del plancton en las riberas del humedal Isla Santay, Río Guayas durante los años 2000 y 2002 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: 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.
    Description: 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.
    Description: Incluye ref.bibl., grafs., ilus.
    Description: Published
    Keywords: 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
    Type: Journal Contribution
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  • 4
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    Moluscos bivalvos de la plataforma continental de Manabí, Ecuador (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: El presente estudio tiene como propósito principal el dar a conocer las especies de bivalvos de la plataforma superior interna de la Provincia de Manabí; relacionándolos con la profundidad, tipo de sedimento, parámetros químicos, abundancia relativa y distribución de estos organismos. Considera que la información recopilada a través de estos trabajos, permitirá tener el cuadro referencial de las condiciones bióticas y abióticas de los bivalvos marinos de la plataforma superior interna de la Provincia de Manabí.
    Description: Incluye ref.bibl., grafs., tbls.
    Description: Published
    Description: Bivalvos, Veneridae
    Keywords: Geographical distribution ; Marine molluscs ; Geographical distribution ; Abundance
    Repository Name: AquaDocs
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  • 5
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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
    Repository Name: AquaDocs
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  • 6
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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
    Repository Name: AquaDocs
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  • 7
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    Composición, distribución y abundancia relativa de copépodos pelágicos calanoideos y no calanoideos en aguas ecuatorianas durante el evento La Niña en septiembre de 2001 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: El presente trabajo es una contribución para el conocimiento de la oceanografía biológica de la región ecuatorial tropical donde se manifiestan estas importantes perturbaciones climáticas.
    Description: The present study is based on the plankton samples collected in the cruise carried out by the Oceanographic Institute of the Equatorian Navy during september 2001. For this study 10 zooplankton samples was analyzed and corresponding to five coastal stations, located approximately in a transect between 81 W and from 1° N to 3°S. 8,208 organisms belonging to 23 families, 43 genus and 97 copepods species were identified. For each station was obtained the percentages of males and females, and the total average for the five stations too. Of the total of identified species 72.51% corresponded to females specimens and 27.49% to males specimens. The distribution of the copépodos species was associated to the conditions oceanographic that were presented during september of 2001. The copepods species of the south of the coast of the Ecuador, they were conformed mainly by species of cold waters, associated to a strong influence of the Humboldt Current that would have contributed to the displacement of characteristic species of cold waters, from the costs of Chile and Perú toward the costs of Ecuador. While in waters of intermediate temperatures, they were species conformed mainly by a transition fauna between cold waters of the south and the warm of the north. On relationship to the station more to the north, the copepods were conformed mainly by species of warm waters. This way, new expectations about the study of biological indicators in the oceanography one could wait, with the analysis and study of the climatic variability and their effect in the populations of the plankton in the ocean.
    Description: Incluye ref.bibl., grafs., tbls.
    Description: Published
    Keywords: Plankton ; Zooplankton ; Geographical distribution ; Marine ecology ; Indicator species ; Community composition ; Marine crustaceans ; Abundance ; Plankton ; Zooplankton ; Marine ecology ; Indicator species ; El Nino phenomena ; Geographical distribution
    Repository Name: AquaDocs
    Type: Journal Contribution , Non-Refereed , Article
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  • 8
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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
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 9
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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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  • 10
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    Variabilidad temporal del fitoplancton en áreas costeras del mar ecuatoriano y su interrelación con el evento La Niña 1999-2000, Ecuador (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: La presente investigación tiene como objetivo conocer la variabilidad espacio temporal del fitoplancton y su interrelación con el evento La Niña 1999-2000 durante la época húmeda y seca considerando los parámetros ambientales: contajes celulares, abundancia relativa, en las estaciones fijas La Libertad y Manta.
    Description: Twenty four and twelve coastals stations were analyze in Manta during the event La Niña 1999 - 2000, graphic of the (with a net of 50u) and the relation with the parameters physical and quimical. The physical conditions during the development of "La Niña 1999-2000" event, were not continued as a defined pattern, showing particular characteristics for each region of the south Pacific ocean. In Ecuador was evidented that the biological productivity creased considerally in the Libertad during the year 2000 before evidencing the upwelling with chlorophyll nucleus creasing of the abundance relative. The main species with mayor cell density in the Libertad were Chaetoceros affinis, Rhizosolenia hebetata, R. stolterfothii, Thalassiosira subtilis, Leptocylindrus danicus. The species representatives in Manta were with mayor cell density in the three cruises were Hemiaulus sinensis, Rhizosolenia imbricata, Chaetoceros curvisetus, Ch. coarctatus, Dityllum brighTwelli which showed variability in their distribution, shaping high nucleus cells.
    Description: Incluye ref.bibl.,grafs.
    Description: Published
    Keywords: Biological production ; Phytoplankton ; Temporal variations ; Biological production ; Phytoplankton ; Upwelling ; Abundance ; El Nino phenomena ; Cell counters
    Repository Name: AquaDocs
    Type: Journal Contribution , Non-Refereed , Article
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