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Neonatal mortality in roe deer

Jarnemo, Anders (2004). Neonatal mortality in roe deer. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae. Silvestria, 1401-6230 ; 321
ISBN 91-576-6705-5
[Doctoral thesis]

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Using radiotelemetry I investigated magnitude and main causes of neonatal mortality of the European roe deer Capreolus capreolus in two long-term studies (Ekenäs 1986-1999, Bogesund 1997-2003) in central Sweden. Summer mortality was 51 and 52% in the two areas, respectively, and predation by red fox Vulpes vulpes accounted for 88% of the mortality in both areas. Other causes of death were starvation/hypothermia/disease and mowing machines. Potential mowing mortality was, however, estimated to 25-44% during a three-year period, but it was also shown that the use of scaring devices was an effective countermeasure. Fox abundance was the only factor with significant effect on between-year variation in fawn survival in the 14-year study at Ekenäs. Predation and fawn survival was strongly correlated to fox abundance. High survival during years of low fox abundance suggested that predation mortality was additive during summer. Fawns born just after the birth peak had the lowest predation risk. Predation rate was highest for fawns born very early or very late. Predation thereby seems to strengthen the birth synchrony in roe deer. Contrary to earlier roe deer findings, there was no difference in vulnerability to predation between the sexes. Also differing from earlier findings was that predation rate was highest during the first week of life and declined thereafter almost linearly. Eighty-five percent were killed before 30 days of age and 98% before 40 days. Different types of landscapes may explain the discrepancies between our study and earlier findings. Maternal age or size of maternal home range did not affect fawn survival whereas type of habitat did. Female reproductive success decreased as area open habitat in home range increased, but only during years of high fox abundance. In years when foxes were scarce, females in open habitats had a higher reproductive success, suggesting a trade-off between using habitats of high-quality forage and habitats of low neonatal predation risk. Analyses of fox and roe deer female behaviour supported the hypothesis that it is easier for the fox to find fawns in open habitats. Roe deer females were, however, quite capable to defend fawns attacked by fox, which may affect the fox’s hunting strategy.

Authors/Creators:Jarnemo, Anders
Title:Neonatal mortality in roe deer
Series Name/Journal:Acta Universitatis Agriculturae Sueciae. Silvestria
Year of publishing :October 2004
Number of Pages:34
ALLI. Jarnemo, A. and Liberg, O. Red fox removal and roe deer fawn survival – a 14-year study. Journal of Wildlife Management, in press. II. Jarnemo, A., Liberg, O., Lockowandt, S., Olsson, A. and Wahlström, K. 2004. Predation by red fox on European roe deer fawns in relation to age,sex, and birth date. Canadian Journal of Zoology 82: 416-422. III. Jarnemo, A., Kjellander, P., Liberg, O., Månsson, J. and Nordström, J. Trade-off between high-quality forage and neonatal predation risk. Manuscript. IV. Jarnemo, A. 2004. Predation processes: Behavioural interactions between red fox and roe deer during the fawning season. Journal of Ethology 22: in press. V. Jarnemo, A. 2002. Roe deer Capreolus capreolus fawns and mowing – mortality rates and countermeasures. Wildlife Biology 8: 211-218.
Place of Publication:Uppsala
ISBN for printed version:91-576-6705-5
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:L Animal production > L20 Animal ecology
Subjects:Not in use, please see Agris categories
Agrovoc terms:roe deer, population dynamics, predators, newborn animals, mortality, predator prey relations, mange, ungulates, foxes, sweden
Keywords:Capreolus capreolus, deer population dynamics, generalist predator, juvenile mortality, predator-prey, predator removal, sarcoptic mange, ungulates, Vulpes vulpes
Permanent URL:
ID Code:656
Department:(NL, NJ) > Institutionen för naturvårdsbiologi (fr.o.m. 970101)
Deposited By: Anders Jarnemo
Deposited On:08 Oct 2004 00:00
Metadata Last Modified:02 Dec 2014 10:06

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