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Table 3 Effect of litter order and duration of long photoperiod (LP) acclimation on torpor use and molting in Siberian hamsters born in first or third litters, and acclimated to LP for 3 or 5 months. Each group consisted of 50 individuals acclimated to the short day for 16 weeks. Bold text indicates statistically significant differences (P < 0.05) between groups acclimated to LP for 3 or 5 months

From: Polymorphism of winter phenotype in Siberian hamster: consecutive litters do not differ in photoresponsiveness but prolonged acclimation to long photoperiod inhibits winter molt

  Torpor use Molting
Number of individuals Number of individuals
Duration of LP acclimation (months) Litter using torpor not using torpor using torpor after 20 weeks under SP molting to white remaining grey molting to white after 20 weeks in SP
3 1 24 20 6 34 12 4
3 27 17 6 37 9 4
5 1 22 20 8 28 15 7
3 21 20 9 26 16 8
  1. Each group consisted of 50 individuals acclimated to the short day for 16 weeks
  2. Values indicated in bold show significant differences (P < 0.05) between groups acclimated to LP for 3 or 5 months