El COB-IEO presenta dos comunicaciones en el XII Congreso Nacional de Acuicultura 2009

La semana próxima da comienzo en Madrid el “XII Congreso Nacional de Acuicultura 2009” que se desarrollará durante los días 24 al 26 de noviembre de 2009 y al que asistirá la investigadora del Centre Oceanogràfic de les Balears, Montserrat Ramón que presentará dos comunicaciones orales:

• Pautas de crecimiento y mortalidad del mejillón cultivado en mar abierto en el delta del Ebro. Autores: M. Ramón, E. Dámaso y E. Galimany.

  Abstract: Growth and mortality of cultured mussels were analyzed in a semi-exposed area during two years by means of a floating structure. Initial mean lengths were 33 mm in October 2007 and reached 60 mm in June 2008. For the first culture cycle (2007-2008), mussels near the surface showed higher growth than those on other depths studied (3 and 6 m) except for August, when we found no length differences between depths. Monthly mortality was below 5% except for summer. Even so, such mortality rates were much lower than those found for mussels cultured in a nearby location, Alfacs bay (100%). It still needs to be confirmed if these tendencies are also observed in the second culture cycle (2008-2009). These results are very important for the local mussel shellfisheries showing similar mussel yield (size and length) between the semi-exposed area and the Ebro Delta bays. Moreover, mortality associated to high temperatures in the bays could be avoided.

• Preferencias alimentarias de Mytilus galloprovincialis. Autores: E. Galimany, M. Ramón y M. Delgado.

  Abstract: The feeding behavior of cultured mussels (Mytilus galloprovincialis) was investigated in a N.W. Mediterranean estuary. For this purpose, the phytoplankton species of the bay water, and stomach contents, feces and pseudofeces of mussels were identified and quantified at four different periods throughout a year. Despite the high abundances of diatoms in the natural water, it was mostly dinoflagellates that were positively selected and ingested.

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