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Redalyc.POLIQUETOS BENTÓNICOS DE LOS FIORDOS MAGALLÁNICOS DESDE EL SENO RELONCAVÍ HASTA EL GOLFO CORCOVADO See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/50285797 POLIQUETOS BENTÓNICOS DE LOS FIORDOS MAGALLÁNICOS DESDE EL SENO RELONCAVÍ HASTA EL GOLFO CORCOVADO (CHILE) Article · January 2009 Source: DOAJ CITATIONS READS 2 144 5 authors, including: Nicolas Rozbaczylo Rodrigo A. Moreno Pontifical Catholic University of Chile University Santo Tomás (Chile) 76 PUBLICATIONS 709 CITATIONS 45 PUBLICATIONS 346 CITATIONS SEE PROFILE SEE PROFILE Roger D. Sepúlveda Universidad Austral de Chile 37 PUBLICATIONS 312 CITATIONS SEE PROFILE Some of the authors of this publication are also working on these related projects: El Paisaje post-desastre en ambientes tsunamicos / The Post-disaster Landscape in tsunami-prone environmemts View project Poliquetos de Sudamérica View project All content following this page was uploaded by Roger D. Sepúlveda on 31 May 2014. The user has requested enhancement of the downloaded file. Redalyc Sistema de Información Científica Red de Revistas Científicas de América Latina, el Caribe, España y Portugal ROZBACZYLO, NICOLÁS; MORENO, RODRIGO A.; SEPÚLVEDA, ROGER D.; CARRASCO, FRANKLIN D.; MARISCAL, JOSEFINA POLIQUETOS BENTÓNICOS DE LOS FIORDOS MAGALLÁNICOS DESDE EL SENO RELONCAVÍ HASTA EL GOLFO CORCOVADO (CHILE) Ciencia y Tecnología del Mar, vol. 32, núm. 2, 2009, pp. 101-112 Comité Oceanográfico Nacional Valparaíso, Chile Disponible en: http://redalyc.uaemex.mx/src/inicio/ArtPdfRed.jsp?iCve=62416056005 Ciencia y Tecnología del Mar ISSN (Versión impresa): 0716-2006 [email protected] Comité Oceanográfico Nacional Chile ¿Cómo citar? Número completo Más información del artículo Página de la revista www.redalyc.org Proyecto académico sin fines de lucro, desarrollado bajo la iniciativa de acceso abierto Cienc. Tecnol. Mar, 32 (2): 101-112,Poliquetos 2009 bentónicos desde Reloncaví al Corcovado (Chile) 101 POLIQUETOS BENTÓNICOS DE LOS FIORDOS MAGALLÁNICOS DESDE EL SENO RELONCAVÍ HASTA EL GOLFO CORCOVADO (CHILE)* BENTHIC POLYCHAETES ON SOFT BOTTOMS OF MAGELLANIC FJORDS FROM SENO RELONCAVÍ TO GOLFO CORCOVADO (CHILE) NICOLÁS ROZBACZYLO1 RODRIGO A. MORENO1, 2 ROGER D. SEPÚLVEDA3 FRANKLIN D. CARRASCO4 JOSEFINA MARISCAL1 1Departamento de Ecología, Facultad de Ciencias Biológicas, Pontificia Universidad Católica de Chile, Casilla 114-D, Santiago, Chile. E-mail: [email protected] 2Instituto Milenio de Ecología y Biodiversidad (IEB), Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago, Chile. 3Instituto de Ecología y Evolución, Universidad Austral de Chile, Casilla 560, Valdivia, Chile. 4Departamento de Oceanografía, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Casilla 160-C, Concepción, Chile. Recepción: agosto de 2008 – Versión corregida aceptada: mayo de 2009 RESUMEN Se presentan los resultados del análisis taxonómico y ecológico de los poliquetos bentónicos submareales obtenidos durante el crucero CIMAR 11 Fiordos. Las muestras fueron obtenidas en el mar interior de los fiordos magallánicos entre el seno Reloncaví (41° 40’ S) y golfo Corcovado (43° 43’ S), Pacífico suroriental, Chile, con un box-corer, entre 16 y 357 m de profundidad. Se recolectaron un total de 1.608 ejemplares de poliquetos pertenecientes a 7 clados, 30 familias y 57 especies. Los grupos funcionales que presentaron mayor abundancia fueron los depositívoros superficiales con un 41%, seguido por los omnívoros/carnívoros con un 27%. Los valores de diversidad específica fue- ron moderados entre 0,71 y 2,43; siendo la dominancia de Berger-Parker entre 0,18 y 0,86 que refleja una relación inversa con los valores de diversidad. Las especies más abundantes fueron Capitella capitata con un 15,92%, seguido de Maldane chilensis con un 10% y Eranno chilensis con un 9,3%. Las especies Amphicteis chilensis, Glycinde armata, Prionospio orensanzi y Thelepus * Proyectos CONA-C11F 05-15. 102 Revista Ciencia y Tecnología del Mar, Vol. 32 (2) - 2009 plagiostoma se distribuyeron entre los 16 y 357 m de profundidad, y 16 especies se recolectaron en una sola profundidad. Con estos resultados llega a 200 el número de especies de poliquetos bentónicos registrados entre el seno Reloncaví y el golfo Corcovado. Palabras claves: Polychaeta, fiordos magallánicos, Pacífico Suroriental, CIMAR 11 Fiordos. ABSTRACT We present the results of taxonomic and ecological analyses of benthic polychaetes obtained during the CIMAR 11 Fjords. Samples were obtained using a box-corer, between Seno Reloncaví (41°40’ S) and Golfo Corcovado (43° 43’ S), in the inner seas of the Magellanic fjords from southeastern Pacific coast of Chile, between 16 and 357 m depth. We collected a total of 1,608 specimens of polychaetes belonging to 7 clades, 30 families and 57 species. The functional groups which presented the greatest abundances were surface deposit-feeders corresponding to 41% of the total, and omnivores and/or carnivores corresponding to 27%. The specific diversity values oscillated between 0.71 and 2.43. Berger-Parker dominance values oscillated between 0.18 and 0.86, reflecting in general a negative relationship with increasing species number in the samples. The most abundant species were Capitella capitata which accounted for 15.92% of all samples, followed by Maldane chilensis with 10%, and Eranno chilensis comprising 9.3% of the total abundance. The species Amphicteis chilensis, Glycinde armata, Prionospio orensanzi and Thelepus plagiostoma were distributed between 16 to 357 m depth; 16 species were collected in a single depth. These results raise the total number of benthic polychaetes recorded between Seno Reloncaví and Golfo Corcova- do to 200 species. Key words: Polychaeta, Magellanic Fjords, SE Pacific, CIMAR 11 Fjords INTRODUCCIÓN dición Mar Chile I", que recolectó 44 espe- cies en el golfo de Ancud (Hartmann- A lo largo de la costa de Chile continental se Schröder, 1965). Recientemente, con el apor- han registrado hasta ahora un total de 496 espe- te del crucero CIMAR 10 Fiordos, después de cies de poliquetos bentónicos (Rozbaczylo & más de 40 años de realizadas las dos primeras Moreno, 2006), mientras que en el área com- expediciones científicas, se ha incrementan- prendida entre el seno Reloncaví (41º 40’ S) y do considerablemente el número de especies la boca del Guafo (43º 45’ S), correspondiente a de poliquetos registradas. Una revisión deta- la costa pacífica de la provincia biogeográfica llada de los resultados de estas expediciones magallánica (42° S-56° S) se han registrado 181 se encuentra en Rozbaczylo et al. (2006a). especies, representando el área geográfica con la mayor riqueza de especies registrada hasta el En la actualidad, gracias al desarrollo de momento en Chile (Rozbaczylo et al., 2006a) y los programas de investigación CIMAR Fior- conformando una zona de "hotspot" de riqueza dos (Palma & Silva, 2006) se han podido in- de especies y endemismo de poliquetos bentó- crementar las investigaciones en términos nicos (Moreno et al., 2006). cuantitativos en aguas más profundas de esta área, contribuyendo a generar nuevo conoci- En esta área geográfica la poliquetofauna miento científico sobre los poliquetos bentó- sólo ha sido explorada por dos importantes ex- nicos de esta región. El objetivo del presente pediciones: la "Lund University Chile Expedi- trabajo es entregar información actualizada tion, 1948-1949", que recorrió principalmente sobre la riqueza de especies, distribución geo- las localidades del seno Reloncaví (41º 28’ S), gráfica, batimétrica, aspectos ecológicos y golfo de Ancud (42º 25’ S), golfo Corcovado zoogeográficos de los poliquetos bentónicos (42º 46’ S), y boca del Guafo (43º 33’ S), regis- obtenidos por el crucero CIMAR 11 Fiordos trando aproximadamente 74 especies de poli- en el área comprendida entre el seno Relon- quetos (Wesenberg-Lund, 1962), y la "Expe- caví y el Golfo Corcovado. Poliquetos bentónicos desde Reloncaví al Corcovado (Chile) 103 MATERIALES Y MÉTODOS (animales y sedimento) fueron fijadas en una solución de formalina en agua de mar al 10%. Análisis taxonómico En el laboratorio, los poliquetos contenidos en cada muestra de sedimento fueron extraídos Los poliquetos se obtuvieron como parte de bajo una lupa binocular Wild M5 y transferi- muestras bentónicas recolectadas durante el dos a una solución de etanol al 70% para su crucero CIMAR 11 Fiordos a bordo del B. O. preservación. Los taxa fueron agrupados en de la Armada de Chile AGOR “Vidal Gormaz”, clados según Rouse & Fauchald (1997) y desde el seno Reloncaví (41º 40’ S) al golfo Rouse & Pleijel (2001) (Tabla I). Corcovado (43° 43’ S), entre el 16 y 27 de ju- lio de 2005, a profundidades de 16 a 357 m Determinación de grupos funcionales (Fig. 1). Las muestras fueron obtenidas con Box-corer de 0,025 m2, principalmente en fon- Los poliquetos fueron categorizados en gru- dos fangosos. Luego, las muestras completas pos funcionales (Tabla II, fig. 2) siguiendo los 80° W 60° 20° 20° S 7 30° 30° 6 Sección CP 5 1 3 4 40°40° 40°40° 2 4 3 8 42° 5 6 9 S 50° 50° 7 Sección HC 14 2 3 5 90°W 53°W Golfo de Ancud Antártica Chilena 6 16 1 60° 60° 7 8 Sección DQ Sección 1 2 3 DH 20 1 45 Castro 1 6 2 2 3 21 Pacífico 4 CIMAR 11 4 5 5 7 8 6 6 7 32 FIORDOS C hiloéSección CL 8 Sección CQ 43° 1 3 33 2 4 5 6 Sección QL 7 36 3 6 5 4 1 7 8 38 Océano Isla 9 olfo Corcovado G 41 Boca del Guafo 51 Bahía Tictoc 50 49 44° 75°W 74° 73° Fig. 1: Mapa con las estaciones de muestreo realizadas durante el crucero CIMAR 11 Fiordos donde se obtuvieron poliquetos bentónicos entre el seno Reloncaví y el golfo Corcovado, Chile. Fig. 1: Map of the sampling stations visited during the CIMAR 11 Fjords sampling cruise were obtained benthic polychaetes between Seno Reloncaví and Golfo Corcovado, Chile. 104 Revista Ciencia y Tecnología del Mar, Vol. 32 (2) - 2009 Tabla I. Composición taxonómica de poliquetos bentónicos recolectados entre el seno Reloncaví y el golfo Corcovado, Chile, durante el crucero CIMAR 11 Fiordos.
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