Body Mass of Roe Deer Fawns during Winter in 2 Contrasting Populations

Gaillard, Jean‐Michel; Delorme, Daniel; Boutin, Jean-Marie; Laere, Guy Van; Boisaubert, B.

doi:10.2307/3802036

Cited by 111 publications

(138 citation statements)

References 27 publications

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“…In our study, on the other hand, we did not find any evidence of an effect of climatic conditions during spring (rainfall), but found that only density accounted for long-lasting cohort effects. This was positively related to early fawn survival (Gaillard et al 1997) and winter mass of fawns (Gaillard et al 1996). Thus, roe deer at Chizé that were born during years of high density not only grew more slowly than fawns born at low density (Gaillard et al 1996), but were also unable to compensate for low initial growth (this study).…”

Section: Discussionmentioning

confidence: 77%

“…This was positively related to early fawn survival (Gaillard et al 1997) and winter mass of fawns (Gaillard et al 1996). Thus, roe deer at Chizé that were born during years of high density not only grew more slowly than fawns born at low density (Gaillard et al 1996), but were also unable to compensate for low initial growth (this study). Under such conditions, early growth of fawns may be a good predictor of individual performance later in life, as reported in male white-tailed deer (Schultz & Johnson 1995), red deer (Kruuk et al 1999) and male bighorn sheep .…”

Section: Discussionmentioning

confidence: 77%

“…Lond. B (2002) juvenile survival (Gaillard et al 1997) and fawn body mass (Gaillard et al 1996), between-habitat differences in density, if they occur, did not balance between-habitat differences in quality that consistently influenced mass in all sex and age classes of roe deer (Pettorelli et al 2001). Such pervasive effects of habitat quality may result from the very sedentary habits of adult roe deer at Chizé (N. Pettorelli, J.-M. Gaillard, G. Van Laere, D. Delorme, P. Duncan and D. Maillard, unpublished data), which limit exchanges between habitats.…”

Section: Discussionmentioning

confidence: 99%

“…The effects of cohort (20 or 19 modalities depending on sex) and habitat type (two modalities) on adult mass were analysed by a two-way ANOVA using Glim software (Francis et al 1993). We then sought to account for cohort variation using the most probable sources of environmental variation, population density and rainfall in May-June, which account for most of the temporal variation in fawn body mass (Gaillard et al 1996) and early survival (Gaillard et al 1997). Accurate estimates of population density based on the capturemark-recapture monitoring (Gaillard et al 1993) were available Proc.…”

Section: (D ) Statistical Proceduresmentioning

confidence: 99%

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Variations in adult body mass in roe deer: the effects of population density at birth and of habitat quality

Pettorelli

Gaillard

Laere

et al. 2002

Proc. R. Soc. Lond. B

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158

139

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Body mass is a key determinant of fitness components in many organisms, and adult mass varies considerably among individuals within populations. These variations have several causes, involve temporal and spatial factors, and are not yet well understood. We use long-term data from 20 roe deer cohorts in a 2600 ha study area (Chizé, western France) with two habitats contrasting in quality (rich oak forest in the North versus poor beech forest in the South) to analyse the effects of both cohort and habitat quality on adult mass (i.e. median body mass between 4 and 10 years of age) of roe deer (Capreolus capreolus). Cohort strongly influenced the adult body mass of roe deer in both sexes: males born in 1994 were 5.2 kg heavier when aged between 4 and 10 years old than males born in 1986, while females born in 1995 were 4.7 kg heavier between 4 and 10 years old than females born in 1982. For a given cohort, adult males were, on average, 0.9 kg heavier in the rich oak forest than in the poor beech forest. A similar trend occurred for adult females (0.5 kg heavier in the oak forest). The effects of cohort and habitat were additive and accounted for ca. 40% of the variation observed in the adult mass of roe deer at Chizé (males: 41.2%; females: 40.2%). Population density during the spring of the birth accounted for about 35% of cohort variation, whereas rainfall in May-June had no effect. Such delayed effects of density at birth on adult body mass probably affect population dynamics, and might constitute a mechanism by which delayed density-dependence occurs in ungulate populations.

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Section: Discussionmentioning

confidence: 77%

Section: Discussionmentioning

confidence: 77%

Section: Discussionmentioning

confidence: 99%

Section: (D ) Statistical Proceduresmentioning

confidence: 99%

See 2 more Smart Citations

Variations in adult body mass in roe deer: the effects of population density at birth and of habitat quality

Pettorelli

Gaillard

Laere

et al. 2002

Proc. R. Soc. Lond. B

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158

139

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“…Gaillard et al 2000b), and the body mass of calves are found to be closely related to environmental conditions associated with food quality and quantity (e.g. Gaillard et al 1996 on population density in roe deer, Saether 1997 in general, Herfindal et al 2006 for moose), as well as maternal effects (e.g. Keech et al 1999, Monteith et al 2009).…”

Section: Modelmentioning

confidence: 99%

Spatio‐temporal relationship between calf body mass and population productivity in Fennoscandian moose Alces alces

Tiilikainen¹,

Solberg

Nygrén³

et al. 2012

Wildlife Biology

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Body mass is an important life history trait related to survival, mating success and fecundity in ungulates. Accordingly, we may expect that both body mass and reproductive measurements at the population level can be used as valid indices of population condition. However, several factors may modify the relationship between body mass and fecundity because of trade‐offs between maturity and early body growth, and varying mortality patterns and sex/age structure among populations. To evaluate the use of such indices for population monitoring and examine the current variation in moose Alces alces population condition in Fennoscandia, we studied the spatio‐temporal relationship between calving rate, twinning rate and average autumn calf body mass of moose in Norway and Finland. Calving rate and twinning rate were based on moose observations by hunters while body mass was the average carcass mass of harvested calves. We found a positive relationship between indices both within and among populations. Calves were on average heavier and the observed recruitment rates higher in Finland than in Norway, which is consistent with the higher moose density and presumably lower primary productivity (higher altitude) of moose ranges in Norway. We also found higher observed recruitment rates in populations and years with more even adult sex ratios (females per male) and low relative harvest rates of calves. This suggests that variation in recruitment rate is not only a matter of nutritional condition, but is also affected by varying hunting regulations and harvest structure. For monitoring purposes, we believe that twinning rate is best suited for ranking populations according to nutritional status as this index is closely related to fitness and is relatively insensitive to variation in perinatal and harvest mortality. However, variation in calf body mass may better reflect temporal variation in living conditions. This is because early body growth is sensitive to variation in food availability (and quality) and because body mass may respond more instantaneously than recruitment indices to adverse conditions. Accordingly, we found both calving rate and twinning rate to be best related to variation in mean calf body mass in the previous year.

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Definitive Case Studies

Owen‐Smith

Marshal

2010

Dynamics of Large Herbivore Populations in Changing Environments

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Body Mass of Roe Deer Fawns during Winter in 2 Contrasting Populations

Cited by 111 publications

References 27 publications

Variations in adult body mass in roe deer: the effects of population density at birth and of habitat quality

Variations in adult body mass in roe deer: the effects of population density at birth and of habitat quality

Spatio‐temporal relationship between calf body mass and population productivity in Fennoscandian moose Alces alces

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