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Mussel mortality in the Gulf of La Spezia, Italy
Collinson, R.I.; Rees, C.P. (1978). Mussel mortality in the Gulf of La Spezia, Italy. Mar. Pollut. Bull. 9(4): 99-101
In: Marine Pollution Bulletin. Macmillan: London. ISSN 0025-326X, more
Peer reviewed article  

Available in  Authors 

Keywords
    Dredging; Mortality causes; Mytilus galloprovincialis Lamarck, 1819 [WoRMS]; Marine

Authors  Top 
  • Collinson, R.I.
  • Rees, C.P.

Abstract
    High mortality of mussels (Mytilus galloprovincialis) on culture-ropes observed during dredging operations in the Gulf of La Spezia, Italy, was due primarily to reduced levels of dissolved oxygen. Mud particles blocking the mantle cavity produced suffocation, and their presence on the valves and in the vicinity of the mussels produced a high BOD which markedly reduced the oxygen concentration in the water. The effect of soluble and insoluble phases of copper released from the perturbed mud and re-suspended in the water column is difficult to ascertain, but under certain conditions it may have introduced additional mechanical and physiological stress.

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