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  • 1
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    Diversidad del plancton en el estuario interior de Puerto Bolívar, Ecuador durante julio de 2002 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: 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.
    Description: 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.
    Description: Incluye ref. bil., grafs.
    Description: Published
    Keywords: Biological production ; Plankton ; Phytoplankton ; Zooplankton ; Biomass ; Species diversity ; Species diversity ; Biological production ; Plankton ; Phytoplankton ; Zooplankton ; Biomass
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 2
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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
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  • 3
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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
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  • 4
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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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  • 5
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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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  • 6
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    Composición y variación estacional del fitoplancton, zooplancton y microbentos en el estuario interior del Golfo de Guayaquil, durante el año 2003 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: El presente trabajo comprende el estudio de la distribution cualitativa y cuantitativa del fitoplancton en el Golfo de Guayaquil, durante dos épocas: Húmeda y seca. El propósito del presente trabajo con respecto al zooplankton está orientado a conocer los cambios en la composición, abundancia y diversidad del zooplancton y en particular el Phyllum Chaetognatha con el objetivo de relacionar la distribución de las especies de Quetognatos con los parámetros físicos. En lo relacionado al estudio del microbentos, se pretende estudiar la composición específica y la abundancia relativa de las especies de la microflora béntica y de la microfauna bentónica y su relación con factores ambientales.
    Description: The present work comprehends the study of the qualitative and quantitative distribution of the phytoplankton in the Gulf of Guayaquil, during two season: Winter and summer. There were identified 63 species in water samples and 79 species in samples with net of 50u in the community of the phytoplankton. The diatoms prevailed dominant and in smaller concentration the dinoflagellates, cianobacters flagellates and tintinnoids. The cell biomass was represented by Paralia sulcata and Skeletonema costatum, they were the most abundant species in all the area. In net samples of 50u the dominant species were: Polymyxus coronalis, Thalassiotrix frawenfeldii, Pseudonitzschia longissima y species benthics: Coscinodiscus perforatus y Cyclotella menenghiniana. The most biomass of zooplankton was registered at the 17 ava bright and the less productivity of zooplankton was registered at Daule River however it was observed a coexist a good diversity of zooplankton groups during season. Stablishment that the species of chaetognatha has a distributions variability in the space and temporal, during september was observed the hight diversity and destacated the most individual numbers density of S. peruviana, S. bodoti and S. neglecta at the Canal of Cascajal and Posorja areas. It was observed a broad distribution main of the species S. bedoti and S. neglecta in the Guayas river ecosystem where it was registered sporadic at 23 stations located near of Mondragon Island until the Canal of Cascajal. It was reported to first registered the species S. bedoti and S. neglecta at the stations denominated second of Perimetral bright and it is distribution continued until the Portete and 17 ava brights localized at interior ramal of Estero Salado during wet season. In the related to the study of the microbenthics, it is sought to study the composition of species and the relative abundance of the species of the benthics microflora and of the benthics microfauna and their relationship with environmental factors.
    Description: Incluye ref.bibl., grafs.
    Description: Published
    Keywords: Phytoplankton ; Biomass ; Zooplankton ; Benthos ; Geographical distribution ; Estuaries ; Diatoms ; Microorganisms ; Community composition ; Seasonal variations ; Phytoplankton ; Diatoms ; Biomass ; Zooplankton ; Microorganisms ; Benthos ; Geographical distribution ; Estuaries
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  • 7
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    Comunidades del plancton en la Caleta Aeolian de la Isla Baltra - Galápagos (Ecuador), durante 2005 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: El propósito del trabajo es determinar la composición, abundancia de los grupos dominantes del fitoplancton y zooplancton, establecer las especies de Quetognatos y su relación con la temperatura superficial del mar durante marzo de 2005 correspondiente a la época húmeda.
    Description: During the study one collected superficial water samples in 12 stations distributed in the Aeolian Bay of the Baltra, Galapagos Islands to determine the primary productivity and secundary on the chain it would feed, the samples of plankton were collected during days 9 to the 13 of march of 2005. In relation to the biomass cellular one identified 24 species in the superface waterproof cloak and 84 species were determined in the samples of network of 50u. In the phytoplankton community, the diatoms prevailed dominant and in smaller concentration the dinoflagelados groups, silicoflagellates, cocolithoforids. In counts cells the dominant species in the area in study were Gymnodinium sp., Filamentos sp., Coscinodiscus excentricus, Thalassiotrix frauenfeldii. In the netwoork samples (50u), the typical water species were registered with high productivity characteristics; Corethron criophyllum, Chaetoceros peruvianus. As far as the zooplanktony productivity a greater biomass collected with the network of 335u in comparison with the network of 600u was determined, and it stands out that the hight biomass of zooplankton was in station 4. Additionally a proportional relation inversely between the abundances of Eggs of fish and taxa of Quetognatos was observed. As far as the species of Quetognatos the presence in abundance order was observed Sagitta neglecta, S. bedoti, S. pacifica, these species are typically of wet season.
    Description: Incluye ref.bibl., grafs.
    Description: Published
    Keywords: Plankton ; Primary production ; Biological production ; Phytoplankton ; Zooplankton ; Biomass ; Plankton ; Primary production ; Biological production ; Phytoplankton ; Zooplankton ; Biomass ; Abundance ; Community composition ; Fish eggs ; Surface temperature
    Repository Name: AquaDocs
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  • 8
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    Procesos planctónicos en el Golfo de Guayaquil (Campo Amistad) julio-agosto/2001 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: El presente trabajo es una contribución al estudio del fitoplancton y zooplancton marino-estuarino y su relación con las condiciones ambientales físico-químicas presentes en el entorno de la plataforma Amistad de producción de gas (Campo Amistad - Golfo de Guayaquil Externo), realizada por el Instituto Oceanográfico de la Armada en el B/I ORION durante julio-agosto del 2001.
    Description: 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 august 31-2001, onboard the R/V Orión of te 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 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.
    Description: Incluye ref.bibl., grafs.
    Description: Published
    Keywords: Biomass ; Zooplankton ; Phytoplankton ; Chlorophylls ; Environmental assessment ; Biomass ; Chlorophylls ; Nutrients (mineral) ; Zooplankton ; Phytoplankton ; Environmental assessment ; Production platforms
    Repository Name: AquaDocs
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