IIMYC   23581
INSTITUTO DE INVESTIGACIONES MARINAS Y COSTERAS
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Trophic spectrum of corymorphid hydroid polyps in the Bahía Blanca Estuary (Southwestern Atlantic Ocean)
Autor/es:
CARCEDO M. CECILIA; GENZANO GABRIEL N.; NAHUELHUAL EUGENIA; CONTE ALBERTO F.; DUTTO M. SOFÍA; GARCIA MAXIMILIANO; HOFFMEYER MÓNICA S.
Lugar:
Camboriú
Reunión:
Congreso; COLACMAR; 2017
Resumen:
Hydroids play important roles in bentho-pelagiccoupling processes in shallow marine ecosystems since their great abundances and the high predation impact on a wide food spectrum, from detritus and benthic microplankton to egg and fish larvae (GILI and HUGHES 1995; OREJAS et al. 2013). The ecological significance of these benthic stages was particularly proved for colonial hydroid polyps (COMA et al. 1995; OREJAS et al. 2000; OREJAS et al. 2001; GENZANO 2005; GILI et al. 2008; OREJAS et al. 2013). Comparatively, trophic knowledge for solitary polyps is scarce and practically no data exists on the natural feeding of Corymorphiidae polyps. The record in nature of these kind of polyps comprises a rare event, sometimes fortuitous (e.g. WATSON 2008; VERVOORT 2009; GENZANO et al. 2009). Numerous polyps of Corymorpha januarii, however, have been observed in muddy-bottom channels of the Bahía Blanca Estuary in Argentina during late spring by local fisherman for more than 20 years. Our work aimed at describing a population of the conspicuous and solitary C. januarii polyp providing one of the first approaches to its feeding ecology.To this end, our objectives were to describe the zonation and the main features of the population and its individuals, and to analyze the diet and the trophic preference of C. januarii polyps.