Endocrine, osmoregulatory, respiratory and haematological parameters in flounder exposed to the water soluble fraction of crude oil

Flounders Pleuronectes flesus with an implanted vascular catheter were exposed to a 50% dilution of the water soluble fraction of Omani crude oil and serial blood samples taken to determine their endocrine status and the resultant and/or causal physiological disturbances

A. Y. A. Alkindi; J. A. Brown; C. P. Waring; J. E. Collins

2005

Scholarcy highlights

  • Flounders Pleuronectes flesus with an implanted vascular catheter were exposed to a 50% dilution of the water soluble fraction of Omani crude oil and serial blood samples taken to determine their endocrine status and the resultant and/or causal physiological disturbances
  • This resulted in a progressive increase in plasma cortisol concentrations from 3 h onwards, and increased plasma glucose concentrations indicating a generalized stress response
  • Plasma osmolality and sodium and chloride concentrations were stable in WSF-exposed fish, plasma potassium concentrations were increased significantly at the 24-and 48-h sampling points
  • The most profound physiological disturbance in WSF-exposed fish was a dramatic decline in blood oxygen content, which is likely to be the cause of the increased plasma noradrenaline concentrations from 3 h onwards
  • Increased noradrenaline is likely in turn to have been responsible for the significant increase in blood haematocrit and blood haemoglobin at the 3-h sampling point, the dominant effect in the longer-term was a significant decline in both of these haematological parameters

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