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Acoustic stress responses in juvenile sea bass Dicentrarchus labrax induced by offshore pile driving
Debusschere, E.; Hostens, K.; Adriaens, D.; Ampe, B.; Botteldooren, D.; De Boeck, G.; De Muynck, A.; Sinha, A.K.; Vandendriessche, S.; Van Hoorebeke, L.; Vincx, M.; Degraer, S. (2016). Acoustic stress responses in juvenile sea bass Dicentrarchus labrax induced by offshore pile driving. Environ. Pollut. 208(Part B): 747-757. https://dx.doi.org/10.1016/j.envpol.2015.10.055
In: Environmental Pollution. Elsevier: Barking. ISSN 0269-7491; e-ISSN 1873-6424
Peer reviewed article  
Available in  Authors 
Keywords
    Fitness
    Marine/Coastal
Author keywords
    Impulsive sound; In situ experiments; Juvenile fish; Acute stress responses
Authors  Top 
  • Debusschere, E.
  • Hostens, K., more
  • Adriaens, D.
  • Ampe, B.
  • Botteldooren, D.
  • De Boeck, G.
  • De Muynck, A.
  • Sinha, A.K.
  • Vandendriessche, S.
  • Van Hoorebeke, L.
  • Vincx, M., more
  • Degraer, S., more
Abstract
    Underwater sound generated by pile driving during construction of offshore wind farms is a major concern in many countries. This paper reports on the acoustic stress responses in young European sea bass Dicentrarchus labrax (68 and 115 days old), based on four in situ experiments as close as 45 m from a pile driving activity. As a primary stress response, whole-body cortisol seemed to be too sensitive to ‘handling’ bias. On the other hand, measured secondary stress responses to pile driving showed significant reductions in oxygen consumption rate and low whole-body lactate concentrations. Furthermore, repeated exposure to impulsive sound significantly affected both primary and secondary stress responses. Under laboratory conditions, no tertiary stress responses (no changes in specific growth rate or Fulton's condition factor) were noted in young sea bass 30 days after the treatment. Still, the demonstrated acute stress responses and potentially repeated exposure to impulsive sound in the field will inevitably lead to less fit fish in the wild.
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