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  • 1
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    Composición y distribución de huevos y larvas de peces frente a la costa ecuatoriana. Septiembre 2007 (2013)
    Details
    Publication Date: 2021-05-19
    Description: Entre el 04 y 13 de septiembre de 2007, se realizó el crucero T07-09-04HL, para determinar la composición de huevos y larvas de peces en la zona marine costera de la costa ecuatoriana. El área de estudio se subdividió en cuatro subáreas, dentro de las cuales se ubicaron 157 estaciones donde se realizaron arrastres verticales utilizando una red CalVET. Se registro un total de 15 940 huevos de peces.m-2, correspondientes a 11 órdenes, 19 familias, 18 géneros, 18 especies y además huevos en su primer estadio embrionario. También se identificaron 23 140 larvas.m-2, que correspondieron a 12 órdenes, 32 familias, 45 géneros, 45 especies, y organismos en estado de prelarva. La distribución de las áreas de abundancia de huevos y larvas de peces determine zonas de mayor concentración alrededor de la Isla Santa Clara, en el área oceánica sur del Golfo y a la altura de Chanduy y Punta Santa Elena (Subárea A). Las larvas de peces pelágicos pequeños, especialmente los engraulidos fueron las más abundantes en el Golfo de Guayaquil, mientras que en las subá¬reas B, C y D, fueron los peces demersales. Esta distribución, tendría relación con las condiciones oceanográficas existentes, puesto que se evidencio la presencia de "La Nina" en dirección sur del mar ecuatoriano.
    Description: Between September 4th and 13th , 2007, took place on cruise T07-09-04HL, to determine the composition of eggs and larvae of marine fish in the coastal area of the Ecuadorian coast. The study area was divided into four sub-areas, inside of which were located 157 stations which were carried out using a vertical drag CalVET network, a total of 15940 eggs peces.m-2 was recorded, corresponding to 11 orders, 19 families, 18 genera, 18 species and also eggs in his first embryonic stage. We also have identified 23140 larvas.m-2, corresponding to 12 orders, 32 families, 45 genera, 45 species, and also other organisms in a state of prelarva. The distribution of the areas of abundance of fish eggs and larvae found areas with the highest concentration around the Santa Clara Island, in the southern area of the Gulf of Guayaquil, and in front of the coast of Chanduy and Punta St. Helena (Sub A). The larvae of small pelagic fish, especially engraulidos were most abundant in the Gulf of Guayaquil, while in subareas B, C and D, were the demersal fish. This distribution would have relation to oceanographic conditions exist, since it have showed the presence of "La Nina" in the southern Ecuadorian sea.
    Description: Published
    Keywords: Fish eggs ; Fish larvae ; Species composition ; Spatial distribution ; Ichthyoplankton
    Repository Name: AquaDocs
    Type: Journal Contribution , Refereed , Article
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  • 2
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    Composición del plancton en la Puntilla Santa Elena durante agosto 2002 (Ecuador) (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: Esta investigación comprende los estudios del fitoplancton-zooplancton-ictioplancton, realizados en tres sitios de la Península Santa Elena durante agosto 2002, área designada para la proyección de "Arrecife Artificial de las Fuerzas Militares del Ecuador": un avión, barco y tanque de guerra, estructuras artificiales consideradas como basura chatarra (de gran tamaño), que serían recicladas para la bio-exploración artificiales hacia la seguridad de los recursos marinos del Ecuador. En el Estudio Ambiental se describen las consideraciones necesarias de carácter multidisciplinario (EIA-INOCAR, 2002).
    Description: The objective of the present study was to carry out a assess of plankton productivity nearest of the Puntilla Santa Elena, for the projection of future Artificial Reefs, carried out by the Oceanographic Institute of the Ecuadorian Navy, during august 2002. The investigated area presented high concentrations of primary and secondary productivity in the column of water (0-10m), with certain daily fluctuation characteristic of the trphic coastal systems that shows the circulation of the coastal currents and submarine topography. The main alimentary complements were the centric diatoms with high chlorophyll (Phytoplankton); the copepods and cladocera were the representative in the second level trophic (Zooplankton). It was a high diversity of fish eggs and larvae, information that would confirm that this sector is an spawn area for this month. The high diversity of crustaceans larvae, makes show off that the substrates of artificial reefs will be an attraction for crabs, shrimp and other crustaceans. Although the stadiums of sessile benthic organisms presented low density of briozoos larvae, cirrepedios, shells (bivalve mollusks and gastropods), they would be those that would populate the superficial layer of the new artificial structures. These marine organisms of the food chain constitute an excellent natural resource for fish and invertebrate organisms, consequently the artificial reefs would be favorable for the reception of the sessile organisms (as macroalgae and corals) and refuge area to alimentary support for other organisms like the fish.
    Description: Incluye ref.bibl., grafs., tbls.
    Description: Published
    Keywords: Biological production ; Plankton ; Zooplankton ; Phytoplankton ; Artificial reefs ; Biological production ; Artificial reefs ; Plankton ; Zooplankton ; Phytoplankton ; Ichthyoplankton
    Repository Name: AquaDocs
    Type: Journal Contribution
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  • 3
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    Unknown
    Bio-oceanografía en el entorno de la isla de La Plata, durante agosto/2001 (2008)
    Instituto Oceanográfico de la Armada, Guayaquil, Ecuador
    Details
    Publication Date: 2021-05-19
    Description: El objetivo de la presente investigación, fue dar un comprensivo entendimiento de las condiciones bio-oceanográficas del fitoplancton-zooplancton-ictioplancton, y las interacciones con el medio circundante (físico, químico), procesos que son complicados cuando involucran aspectos hidrográficos costeros como áreas de afloramiento, áreas de pesca y áreas de soporte alimentario para los diferentes recursos marinos costeros planctónicos-bentónicos y aves-mamíferos marinos.
    Description: The oceanographic Institute of the Ecuadorian Navy carried out a coastal cruise around La Plata Island in August 2001 onboard the R/V RIGEL. The main objective was to study the distribution and interaction of ecological variables affecting phyto-zooplankton and ichthyoplankton, as a tool for the evaluation of coastal marine resources. An important aspect is the bathymetry of the area influencing the biological component. Shallower waters are found southwards allowing the occurrence of upwelling and advection processes that bring nutrient rich waters to the surface. This is shown by the high chlorophyll "a" content found in the south, favorable for phyto- and zooplankton production, also abundant in that region. The cellular biomass was composed by species that are indicative of mixed waters, warm-oceanic and upwelling waters with increased abundance towards the south. The tendency of increased biological productivity in the southern margin of La Plata Island is coincident with other ecosystems such as the Galápagos Islands and Santa Clara Island. These southern areas area important ecological niches, i.e. birds and marine mammals, decisive for coastal marine resources support. It is of extreme importance to continue the vigilance and control of these areas, specially due to the negative effects that the proximity of commercial marine traffic may produce.
    Description: Incluye ref.bibl., grafs.
    Description: Published
    Keywords: Marine resources ; Phytoplankton ; Zooplankton ; Biological production ; Marine ecology ; Marine ecology ; Phytoplankton ; Zooplankton ; Ichthyoplankton ; Upwelling ; Biological production ; Marine resources ; Cruises ; Oceanic islands ; Coastal zone
    Repository Name: AquaDocs
    Type: Journal Contribution
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