seasonal and vertical distribution of medusae in aysén region, southern chile distribución estacional y vertical de medusas en la región de aysén, sur de chile

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ID: 208914
2011
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Abstract
Medusae collected in winter and spring 2007 were analyzed in a longitudinal transect made between the Boca de Guafo and Elefantes Fjord, southern Chile. A total of 30 species were identified, Hydromedusae (29) and Scyphozoa (1), where Bougainvillia macloviana, Hybocodon chilensis, Hydractinia tenuis, Laodicea pulcra, L. undulada, Modeeria rotunda and Chrysaora plocamia represent new records for the area. A significant increase in the jellyfish abundance was higher in spring than in winter (fourteen times higher), with 68% of common species in both seasons. The specific diversity was slightly higher in winter (3.4 bits) than spring (3.2 bits), the species richness instead was higher in spring than in winter, with a mean of 5 and 12 species, respectively. The vertical distribution showed the presence of surface (H. borealis), deep (A. apicata, C. peregrina and R. velatum) and wide bathymetric distribution (B. muscoides and B. muscus) species. Results from the area were compared with previous results (2002-2003) thus proving that most species identified are common in southern Chilean fjords and channels.
Se analizaron las medusas colectadas en invierno y primavera de 2007, en una transecta longitudinal efectuada entre la boca del Guafo y fiordo Elefantes, sur de Chile. Se identificó un total de 30 especies, Hydromedusae (29) y Scyphozoa (1), de las cuales Bougainvillia macloviana, Hybocodon chilensis, Hydractinia tenuis, Laodicea pulcra, L. undulada, Modeeria rotunda y Chrysaora plocamia constituyen nuevos registros para esta área. Se determinó un fuerte incremento en la abundancia de medusas en primavera respecto a invierno y (14 veces mayor), con un 68% de especies comunes en ambas estaciones. La diversidad específica fue levemente mayor en invierno (3.4 bits) que primavera (3.2 bits), en cambio la riqueza de especies fue mayor en primavera que en invierno, con una media de 5 y 12 especies, respectivamente. La distribución vertical mostró en ambas estaciones la presencia de especies superficiales (H. borealis), profundas (A. apicata, C. peregrina y R. velatum) y de amplia distribución batimétrica (B. muscoides y B. muscus). Los resultados obtenidos en esta área se compararon con resultados obtenidos anteriormente (años 2002 y 2003) y se confirmó que la mayoría de las especies identificadas son comunes en fiordos y canales australes de Chile.
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bravo2011latinseasonal Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Viviana Bravo;Sergio Palma;Nelson Silva
Journal Orthopaedic journal of sports medicine
Year 2011
DOI
DOI not found
URL
http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-560X2011000200017
Keywords
fisheries cnidaria anglingoceanographybiology (general)

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