Is behavioral variation along the bold-shy continuum associated with variation in the stress axis in zebrafish?

  title={Is behavioral variation along the bold-shy continuum associated with variation in the stress axis in zebrafish?},
  author={Mary E. Oswald and Robert E. Drew and Matt Racine and Gordon K. Murdoch and Barrie D. Robison},
  journal={Physiological and biochemical zoology : PBZ},
  volume={85 6},
We tested whether boldness is associated with attenuation of the physiological stress response in behaviorally selected lines of zebrafish Danio rerio. We measured three component behaviors of boldness: cortisol levels under control and stressed conditions, growth rate, and expression of key genes linked to the hypothalamic-pituitary-interrenal axis in the brain. Surprisingly, bold animals did not differ from shy animals with respect to cortisol levels. However, significant differences between… CONTINUE READING


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