Endocrine and metabolic dysfunction in yellow perch,Perca flavescens, exposed to organic contaminants and heavy metals in the ST. Lawrence river

The endocrine and biochemical responses to the acute stress of capture and handling were investigated in sexually mature and in immature male and female yellow perch, Perca flavescens, from a site contaminated by organic contaminants and heavy metals and from a reference site in the St

Alice Hontela; Pierre Dumont; Dominick Duclos; RÉJean Fortin

2010

Scholarcy highlights

  • The endocrine and biochemical responses to the acute stress of capture and handling were investigated in sexually mature and in immature male and female yellow perch, Perca flavescens, from a site contaminated by organic contaminants and heavy metals and from a reference site in the St
  • Following a standardized capture and handling stress, fish from the contaminated site did not exhibit the expected physiological stress response observed in fish from the reference site
  • Blood Cortisol and thyroxine levels were lower, and liver glycogen stores were greater in mature males and females, as well as in the immature fish from the contaminated site, compared to the reference site
  • The impaired ability to elevate blood Cortisol in response to an acute stress may be used as a biomarker of toxic stress in health assessment of feral fish from polluted environments

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