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Estudio de la macrofauna bentónica en Bahía Chile y Ensenada Guayaquil (Isla Greenwich, Antártica).

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Estudio de la macrofauna bentónica ...
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Author
Calderón, T.
Jaramillo, S.
Date
1998

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Abstract
Durante la VII Expedición Antártica Ecuatoriana (Verano austral 1998), se tomaron un total de 4 muestras de sedimentos en los fondos de la Bahía Chile y 7 en la Ensenada Guayaquil, utilizando una draga tipo Van Veen de capacidad de 0.1m2. Los taxones más representativos de la macrofauna bentónica fueron Poliquetos con 13 familias, Anfípodos 7 familias y el filo nemátodos. Se identificó a nivel de familia los Poliquetos y Anfípodos. Como fauna acompañante se obtuvo un total de 15 taxas bentónicas representados por 8 filos. Las familias más abundantes de poliquetos en Bahía Chile fueron Capitellidae con 37.38% y Spionidae con 17.89%. Además se reconocieron 4 familias de Anfípodos, de las que Phoxocephalidae representó el 57.89% el total de dicho grupo. En la Ensenada Guayaquil las familias de Poliquetos con mayor número de ejemplares fueron Maldanidae con el 50.20% y Capitellidae con el 30.68%. Se encontró 6 familias de Anfípodos de las cuales Eusiridae con el 41.58%, e Ischyroceridae con el 31.68% son los más abundantes. Otros grupos menos numerosos también fueron registrados, entre ellos Bivalvos, Gasterópodos, Cumáceos, Isópodos, Tanaidáceos, Sipuncúlidos, Poliplacóforos, Asteroideos, Ofiuroideos, Ascidias y Antozoos. Se presentan fotos y tablas de porcentajes de los grupos bentónicos y de familias.
During the VII Antarctic Ecuadorian Expedition (Austral summer, 1998), we were carried out a total of 4 patterns of silts in the funds of the Bay Chile, and 7 in the Guayaquil Cove, utilizing a dredge type Van Veen of capacity of 0.1 m2. The more representative taxon of its benthonic macrofauna was Polychaetes with 13 families, Anphipods with 7 families, and Nematods worms. The Polychaetes and Amphipods was identified to level of family. As accompanying fauna was gotten a total of 15 benthonic taxas, represented by 8 phyllums. The most abundant families of Polychaetes in Bay Chile was Capitellidae with 37.38% and Spionidae with 17.89%. Further, 4 families and Amphipods were recognized, of that which Phoxocephalidae represented the 57.89% the total of this group. In the Guayaquil Cove, the families of Polychaetes with greater number of individuals, were Maldanidae with the 50.20% and Capitellidae with the 30.68. There were 6 families of Amphipods of the who, Eusiridae with the 41.58% and Ischyroceridae with the 31.68%, are the most abundant. Other group less numerous they also were registered, among them Bivalves, Gasteropds, Cumaceos, Isopoda, Tanaidacea, Sipunculida, Poliplacophora, Asteroidea, Ophiures, Ascidans, and Anthozoa. Photos are introduced, graphics and list of percentages of the benthics groups and families.
Journal
Acta Antartica Ecuatoriana
Volume
4
Issue/Article Nr
1
Publisher or University
Instituto Antártico Ecuatoriano
URI
http://hdl.handle.net/1834/3853
Collections
Acta Antártica Ecuatoriana

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