Composición y distribución de Amphipoda (Hyperiidae) en aguas ecuatorianas durante el evento de La Niña 2005
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2007
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El presente trabajo de investigación fue realizado, basado en muestras recolectadas de zooplancton durante el crucero, CO-II-05 a bordo del BAE ORIÓN”, del Instituto Oceanográfico de la Armada durante Octubre, 2005. En este estudio se analizaron 36 submuestras de zooplancton, correspondientes a 18 estaciones completas a lo largo del mar ecuatoriano, ubicadas en varias transectas. Las muestras colectadas fueron efectuadas mediante arrastres superficiales; empleando redes cónicas simples con poro de malla de 600 μ y 335 μ. Se realizó, un estudio de taxonomía de las especies de anfípodos hipéridos, para determinar la composición, distribución y abundancia relativa en el área del Frente Ecuatorial. Se identificaron un total de 13 familias, 25 géneros y 30 especies de anfípodos. Al muestrear una mayor cantidad de organismos con redes de diferentes poros de malla, permitió obtener un mayor número de especies con diferentes rangos de tallas y número de especímenes. Al emplear diferentes tipos de redes se permite apreciar mejor la variabilidad de los diferentes estadios de desarrollo, observándose una mayor presencia de juveniles La distribución de las especies se asoció con las condiciones oceanográficas registradas durante Octubre, 2005. Además para ampliar el conocimiento de las especies de este taxón se analizaron submuestras de zooplancton en las que se separó anfípodos hipéridos correspondientes al crucero, CO-II-01 del INOCAR recolectadas en Septiembre, 2001. Estas muestras fueron recolectadas con arrastres oblicuos desde una profundidad de 150 m que correspondieron a 15 estaciones completas con un total de 409 organismos identificados
The present research was conducted, based on zooplankton samples collected during the cruise, CO-II-05 BAE aboard ORION ", the Oceanographic Institute of the Navy in October, 2005. In this study, we examined 36 sub-samples of zooplankton, for 18 full seasons along the Ecuadorian sea, located in several transects. The collected samples were conducted using surface tows, using simple conical nets with mesh pore 600 μ and 335 μ. We conducted a study of taxonomy of amphipods hyperiid to determine the composition, distribution and relative abundance in the area of the Equatorial Front. We identified a total of 13 families, 25 genera and 30 species of amphipods. Sampling a larger number of organisms with different pore networks mesh yielded a greater number of species with different size ranges and number of specimens. By employing different types of networks allows better appreciate the variability of the different stages of development, with a greater presence of juveniles The distribution of species was associated with oceanographic conditions registered in October, 2005, Also to increase awareness species of this taxon were analyzed zooplankton subsamples in which amphipods hyperiid separated for the cruise, CO-II-01 INOCAR collected in September, 2001. These samples were collected with oblique tows from a depth of 150 m which corresponded to 15 full seasons with a total of 409 bodies identified
The present research was conducted, based on zooplankton samples collected during the cruise, CO-II-05 BAE aboard ORION ", the Oceanographic Institute of the Navy in October, 2005. In this study, we examined 36 sub-samples of zooplankton, for 18 full seasons along the Ecuadorian sea, located in several transects. The collected samples were conducted using surface tows, using simple conical nets with mesh pore 600 μ and 335 μ. We conducted a study of taxonomy of amphipods hyperiid to determine the composition, distribution and relative abundance in the area of the Equatorial Front. We identified a total of 13 families, 25 genera and 30 species of amphipods. Sampling a larger number of organisms with different pore networks mesh yielded a greater number of species with different size ranges and number of specimens. By employing different types of networks allows better appreciate the variability of the different stages of development, with a greater presence of juveniles The distribution of species was associated with oceanographic conditions registered in October, 2005, Also to increase awareness species of this taxon were analyzed zooplankton subsamples in which amphipods hyperiid separated for the cruise, CO-II-01 INOCAR collected in September, 2001. These samples were collected with oblique tows from a depth of 150 m which corresponded to 15 full seasons with a total of 409 bodies identified
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AMFÍPODOS, ABUNDANCIA RELATIVA, COMPOSICIÓN, DISTRIBUCIÓN, TALLA