Obese and lean Zucker rats demonstrate differential sensitivity to rates of food reinforcement in a choice procedure.

@article{Buckley2012ObeseAL,
  title={Obese and lean Zucker rats demonstrate differential sensitivity to rates of food reinforcement in a choice procedure.},
  author={Jessica L. Buckley and Erin B. Rasmussen},
  journal={Physiology & behavior},
  year={2012},
  volume={108},
  pages={19-27}
}
The obese Zucker rat carries two recessive fa alleles that result in the expression of an obese phenotype. Obese Zuckers have higher food intake than lean controls in free-feed studies in which rats have ready access to a large amount of one type of food. The present study examined differences in obese and lean Zucker rats using concurrent schedules of reinforcement, which more ecologically models food selection using two food choices that have limited, but generally predictable availability… CONTINUE READING
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