Composición y abundancia de zooplancton en el ecosistema marino de Cerro Negro y El Brujo - La Libertad 2017
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Date
2018
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Universidad Nacional de Trujillo
Abstract
La composición y abundancia del zooplancton en zonas del ecosistema marino de Cerro Negro y El Brujo, se determinarondurante julio a diciembre 2017. Se establecieron cinco perfiles con tres estaciones para El Brujo y tres perfiles con cuatro estaciones para Cerro Negro, las muestras fueron colectadas, empleando una red de 300 μ, siendo conservadas con formaldehido al 4%. Se tomaron parámetros físicos (Temperatura (°C), Salinidad (ups)) y parámetros químicos (Oxígeno disuelto (mL/l), pH). Se determinó composición, densidad, frecuencia de ocurrencia e índices ecológicos de Shannon – Wiener (H´) y Dominancia de Simpson (1-λ´). Se reportaron 80 y 86 especies en las zonas de Cerro Negro y El Brujo respectivamente,distribuidas en los Phyllum Foraminífera, Arthropoda, Chordata, Annelida, Mollusca, Brachiopoda, Briozoa, Chaetognatha, Cnidaria, Ctenophora y Phoronida en ambas zonas, siendo la especie Bolivina sp., la más frecuente y abundante. La mayor densidad dezooplancton se presentó en el mes de agosto con 23 259 ind/𝑚3en El Brujo, y en setiembre con 10 047 ind/𝑚3 en Cerro Negro. La mayor diversidad, se presentó en Cerro Negroen el mes de julio con2,82 bits/ind. y El Brujo en el mes de Julio con 2,20 bits/ind.
The description and abundance of zooplankton in zones of the marine ecosystem of Cerro Negro and El Brujo, was determined in July to December of 2017. Five profiles were established with three stations for Cerro Negro, the samples were collected, using a red of 300 μ, being preserved with 4% formaldehyde. Physical parameters were taken (Temperature (° C), Salinity (ups)) and chemical parameters (Dissolved oxygen (mL / l), pH). The composition, density, frequency of occurrence and ecological indexes of Shannon - Wiener (H ') and Dominance of Simpson (1 - λ') were determined. 80 and 86 species were reported in the areas of Cerro Negro and El Brujo respectively, distributed in the Phylum Foraminifera, Arthropoda, Chordata, Annelida, Mollusca, Brachiopoda, Briozoa, Chaetognatha, Cnidaria, Ctenophora and Phoronida in both zones, being the Bolivina sp. species, the most frequent and abundant. The zooplankton density density was presented in the month of August with 23 259 ind / m ^ 3 in El Brujo, and in September with 10 047 ind / m ^ 3 in Cerro Negro. The greatest diversity was presented in Cerro Negro in the month of July with 2,82 bits / ind. and El Brujo in the month of July with 2,20 bits/ind.
The description and abundance of zooplankton in zones of the marine ecosystem of Cerro Negro and El Brujo, was determined in July to December of 2017. Five profiles were established with three stations for Cerro Negro, the samples were collected, using a red of 300 μ, being preserved with 4% formaldehyde. Physical parameters were taken (Temperature (° C), Salinity (ups)) and chemical parameters (Dissolved oxygen (mL / l), pH). The composition, density, frequency of occurrence and ecological indexes of Shannon - Wiener (H ') and Dominance of Simpson (1 - λ') were determined. 80 and 86 species were reported in the areas of Cerro Negro and El Brujo respectively, distributed in the Phylum Foraminifera, Arthropoda, Chordata, Annelida, Mollusca, Brachiopoda, Briozoa, Chaetognatha, Cnidaria, Ctenophora and Phoronida in both zones, being the Bolivina sp. species, the most frequent and abundant. The zooplankton density density was presented in the month of August with 23 259 ind / m ^ 3 in El Brujo, and in September with 10 047 ind / m ^ 3 in Cerro Negro. The greatest diversity was presented in Cerro Negro in the month of July with 2,82 bits / ind. and El Brujo in the month of July with 2,20 bits/ind.
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Keywords
Zooplancton, Cerro Negro, El Brujo,Diversidad, Densidad