Small Dendrobaena earthworms survive freezing better than large worms.

@article{Holmstrup2007SmallDE,
  title={Small Dendrobaena earthworms survive freezing better than large worms.},
  author={Martin Holmstrup and Johannes Overgaard and Mark Bayley},
  journal={Cryobiology},
  year={2007},
  volume={54 3},
  pages={
          298-300
        }
}
Dendrobaena octaedra is a freeze tolerant earthworm widely distributed in boreal regions. Specimens collected in Sweden were cold acclimated and then frozen at -7 degrees C to examine the influence of body mass on survival of freezing. Results showed that survival was negatively correlated to body mass. Glycogen content of the worms was variable and seemed to decrease with increasing body mass consistent with the hypothesis that freeze survival is dependent on the ability to rapidly break down… CONTINUE READING
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