Coastal upwelling, primary production and mussel growth in the Rías Baixas of Galicia

作者: F.G. Figueiras , U. Labarta , M.J. Fernández Reiriz

DOI: 10.1023/A:1021309222459

关键词:

摘要: The Rias Baixas are four flooded tectonic valleys located on the northwest Iberian Peninsula that support a mussel production of about 250 × 106 kg y−1 from 3337 rafts. Mussel in this region is highest Europe and one most intensive world, giving employment to 9000 people directly 20000 indirectly. causes high discussed through analysis published some unpublished information. interaction between coastal upwelling circulation patterns Rias, which channel 3-dimensional variability open ocean into 2-dimensional system, promotes massive response productivity phytoplankton populations inside even during weak events along coast. Coastal area typically occurs March–April September–October. mean value gross primary whole season ∼1.4 g C m−2 d−1, although sporadic values ∼4 d−1 may occur relaxation events, when export shelf restricted. growth mainly season. It estimated harvest extracts ∼10% production. provides food quality (f ∼0.5) determines absorption efficiency (∼0.6), whereas characteristics maintains seston concentration at levels (0.5 – 1.3 mg TPM l−1 <5 Chl m−3) below threshold pseudo-faeces physiological behaviour mussels indicates yield culture Galicia consequence particular seston.

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