Hormone and metabolite changes associated with extended breeding fasts in male northern elephant seals (Mirounga angustirostris).

  title={Hormone and metabolite changes associated with extended breeding fasts in male northern elephant seals (Mirounga angustirostris).},
  author={Daniel E Crocker and Rudy M Ortiz and Dorian S. Houser and Paul M. Webb and Daniel P Costa},
  journal={Comparative biochemistry and physiology. Part A, Molecular & integrative physiology},
  volume={161 4},
We measured metabolic hormones and several key metabolites in breeding adult male northern elephant seals to examine the regulation of fuel metabolism during extended natural fasts of over 3 months associated with high levels of energy expenditure. Males were sampled twice, early and late in the fast, losing an average of 23% of body mass and 47% of adipose stores between measurements. Males exhibited metabolic homeostasis over the breeding fast with no changes in glucose, non-esterified fatty… CONTINUE READING
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