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Experimental tests of food limitation

Experimental tests of food limitation. Individual as the experimental unit. Becker et al. 1998. Oikos 81:81-92. Larsen et al. 1997. J. Mamm. 78:192-203. Boutin & Larsen 1993 J.Anim.Ecol. 78:192-203. The effects of food supplementation on winter survival…. p=0.07. p=0.22.

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Experimental tests of food limitation

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  1. Experimental tests offood limitation • Individual as the experimental unit Becker et al. 1998. Oikos 81:81-92 Larsen et al. 1997. J. Mamm. 78:192-203 Boutin & Larsen 1993 J.Anim.Ecol. 78:192-203

  2. The effects of food supplementation on winter survival… p=0.07 p=0.22

  3. …body mass p=0.79 p=0.27

  4. …parturition date p=0.003 p=0.73

  5. …litter size p=0.14 p=0.10

  6. …weaning success p=0.63 p=0.73

  7. ReproductiveEnergetics • Natural and experimental variation in litter size • Short-term energetic and behavioural consequences • Long-term life history consequences Humphries & Boutin 2000 Ecology 81:2867-77 Humphries & Boutin 1999 Can.J. Zool. 77:171-73 Humphries & Boutin. 1996. J. Anim. Ecol. 65:332-338

  8. M.Sc.

  9. +/-/ 2 offspring Weigh and tag Maternal behaviour and energetics

  10. Juvenile growth Treatment p=0.009 Year p<0.001

  11. Maternal behaviour Treatment p=0.54 Year p<0.001

  12. Maternal expenditure Treatment p=0.001 Temperature p<0.001

  13. Post-weaning Juvenile Survival Treatment p=0.04

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