Upper thermal limits of the hearts of Arctic cod Boreogadus saida: adults compared with larvae

J Fish Biol. 2016 Feb;88(2):718-26. doi: 10.1111/jfb.12807. Epub 2015 Nov 25.


Wild adult and reared larval Boreogadus saida were acclimated to 3·5° C before testing their cardiac response to acute warming. Heart rate transition temperatures during warming were similar for adult and larval hearts, except that the maximum temperature for heart rate was 3° C warmer for adults. Thus, in a rapidly warming Arctic Ocean, the upper temperature limit for larval rather than adult B. saida appears more likely to dictate the southern range of the species.

Keywords: climate change; food web; heart rate; transition temperatures: TAB, TQB, Tmax, TAR.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acclimatization
  • Animals
  • Arctic Regions
  • Gadiformes / physiology*
  • Heart / physiology*
  • Heart Rate
  • Larva / physiology
  • Temperature*