Heavy metals in seabed sediments beneath off-shore fish cages

  1. Hernández-Sánchez, C.
  2. Martinez-López, S.
  3. Riera, R.
  4. González-Weller, D.
  5. Gutiérrez, A.J.
  6. Burgos, A.
  7. Rubio, C.
  8. Martínez-Sánchez, M.J.
  9. Pérez-Sirvent, C.
  10. Hardisson, A.
Revista:
Vieraea

ISSN: ISSN 0210-945X

Año de publicación: 2017

Volumen: 45

Páginas: 367-380

Tipo: Artículo

GOOGLE SCHOLAR lock_openAcceso abierto editor

Resumen

Laindustria de la acuicultura ha estado aumentando constantemente en todo el mundo en la última década, existiendo en la actualidad numerosas jaulas “off-shore”. Los impactos ambientales de las jaulas off-shore se han centrado en los efectos de los restos no consumidos y de las heces de peces en las estructuras bentónicas. Sin embargo, la liberación de metales pesados asociados con las actividades acuícolas sigue siendo poco estudiada. En el presente estudio se analizaron las concentraciones de metales pesados (Cd, Co, Cr, Cu, Mn, Ni, Pb y Zn) en los sedimentos de las jaulas de peces offshore. Dos concesiones de acuicultura fueron muestreadas en dos localidades, NEySOdeTenerife (Islas Canarias, NE OcéanoAtlántico). Los sedimentos de lugares no afectados fueron analizados para determinar si hubo cambios significativos en la composición de metales pesados en los debido a las actividades de acuicultura. Hubo diferencias significativas en Cd, Co, Cr, Cu, Ni, Pb y Zn en ambas áreas, con la excepción de Mn que estaba en grandes cantidades. El alto contenido de Mn recogido en muestras de ambas áreas podría tener un origen volcánico. Las concentraciones de metales pesados que se encuentran en los sedimentos debajo de las jaulas de fondo marino no presentan riesgo para el medio ambiente.

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