4.7 Article

Effects of acute exposure to dispersed oil and burned oil residue on long-term survival, growth, and reproductive development in polar cod (Boreogadus saida)

Journal

MARINE ENVIRONMENTAL RESEARCH
Volume 140, Issue -, Pages 468-477

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.marenvres.2018.09.005

Keywords

Arctic; Petroleum hydrocarbons; Growth; Reproductive cycle; Sublethal effects; Oil spill response

Funding

  1. International Association of Oil and Gas Producers, Arctic Oil Spill Response Technology - Joint Industry Programme
  2. flagship research programme Environmental impact of industrial development in the north (MIKON) of the Fram Centre
  3. NRC project EWMA [195160]
  4. NRC project ARCEx [228107]

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The present study investigates the potential long-term physiological effects on maturing polar cod (Boreagadus saida), an Arctic key species, after an acute exposure (48 h) to environmentally realistic concentrations of either mechanically dispersed oil (MDO), chemically dispersed oil (CDO) or burned oil residues (BO) (N = 58-60 per treatment). Following exposure, fish were monitored in a common tank supplied with clean water for a seven month period coinciding with the period of reproductive development. Females exposed to BO residues were more frequently found in an earlier phase of gonadal maturation compared to unexposed females while no effects of different oil spill response (OSR) actions were seen in the reproductive development of males. Mechanically and chemically dispersed oil induced a transient short-term reduction in growth in the first week post-exposure. Overall, no significant long-term effects of exposure were seen in growth or mortality. Ultimately, this study provides information for the assessment of population consequences of different OSR actions as part of a net environmental benefit analysis.

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