Some Factors Affecting Survival of Desert Mule Deer Fawns

Smith, Ronald H.; LeCount, Albert L.

doi:10.2307/3808744

Cited by 43 publications

(40 citation statements)

References 2 publications

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“…This eect was expected in ChizeÂ where severe droughts occur, causing either direct (overheating reported for musk deer, Chaplin 1977) or indirect consequences through eects on vegetation. A positive eect of spring rainfall on fawn survival has also been reported in white-tailed deer (Smith and Lecount 1979;Kie and White 1985), fallow deer (Mulley et al 1990) and roe deer (Gill 1994) in areas where droughts are frequent. The positive eect of spring rainfall observed in Trois Fontaines is more surprising because the long-term average (150 mm in May±June) is almost twice that at ChizeÂ (88 mm).…”

Section: Proximate Causes Of Yearly Variation In Summer Survivalmentioning

confidence: 82%

Early survival in roe deer: causes and consequences of cohort variation in two contrasted populations

et al. 1997

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Time- and sex-specific summer survival of roe deer fawns was estimated using capture-mark-recapture methods in two enclosed populations living in contrasting conditions. The population of Trois Fontaines (eastern France) was roughly constant in size throughout the study period, while in Chizé (western France), the population experienced frequent summer droughts and numbers decreased continuously during the study. Early survival of fawns was low and highly variable over the years at both Chizé and Trois Fontaines, and demonstrated marked variations between cohorts that need to be taken into account when modelling roe deer population dynamics. In Trois Fontaines, fawn survival was positively correlated with early body growth and total rainfall in May and June. In Chizé, fawn survival decreased with increasing density and tended to increase with increasing rainfall in May and June and adult female body mass. These factors explained more than 75% of the variability in early survival observed in both populations. Variation between cohorts had different consequences for the two populations. At Trois Fontaines, cohort variation was limited to a numerical effect on early survival. However at Chizé, cohort variation was long-lasting and affected the phenotypic quality of survivors at later ages, and thereby future survival and breeding abilities (both numerical and quality effects). Male and female fawns had similar survival over their first summer in both populations. This result contrasts with the lower survival of young males often observed in ungulates. Two ultimate causes can be proposed to account for the low and variable survival of roe deer fawns over the first summer: the high energy expenditures incurred by does during each breeding attempt and/or the low absolute body size of newborn roe deer fawns.

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Section: Proximate Causes Of Yearly Variation In Summer Survivalmentioning

confidence: 82%

Early survival in roe deer: causes and consequences of cohort variation in two contrasted populations

et al. 1997

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“…They found that concealment cover at the 0.0-0.5 m height interval made the largest contribution. Dense bedsite cover was found to be critical to fawn survival in Montana (Riley and Dood, 1984), Arizona (Smith and LeCount, 1979) and Iowa (Huegel et al, 1986). Germaine et al (2004) found that site temperature and canopy closure were the most influential attributes in bedsite selection by deer.…”

Section: Introductionmentioning

confidence: 97%

Daytime bedsite selection by the texan white-tailed deer in xerophyllous brushland, North-eastern Mexico

Gallina

Bello

Verteramo

et al. 2010

Journal of Arid Environments

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“…files and personnel (Smith et al, 1969;Smith and LeCount, 1979;Horejsi, 1982;Boyd, 2001;O'Brien et al, 2002). Surveys to count and classify deer have been conducted in the TBWA in January annually since the late 1950s.…”

mentioning

confidence: 95%

“…Fawn survival of white-tailed deer (Odocoileus virginianus) was positively correlated to precipitation during the gestation period in the Welder Wildlife Refuge in Texas (Kie and White, 1985), and there was a strong influence of rainfall on mule deer fawn survival in southwestern Texas (Leopold and Krausman, 1991). In Arizona, Smith and LeCount (1979) reported a significant correlation between fawns per 100 females (hereafter fawn:female ratio[s]) and October-June precipitation preceding the fawning period, and Wakeling (2001) reported a positive correlation between monthly precipitation and Palmer Drought Severity Index to mule deer fawn:female ratios.…”

mentioning

confidence: 98%

“…Cattle were permanently removed in 1947 (McCulloch, 1954) and the TBWA was closed to hunting until 1961, when any-deer hunting was implemented until 1968. At that time female mule deer hunting was discontinued in favor of male-only hunting (Smith and LeCount, 1979). From 1973 to 1979, the TBWA was closed for hunting and afterwards it was opened for male-only harvest until the present.…”

mentioning

confidence: 99%

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