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Reproductive characteristics of female white-tailed deer (Odocoileus virginianus) in the Midwestern USA.
Green, Michelle L; Kelly, Amy C; Satterthwaite-Phillips, Damian; Manjerovic, Mary Beth; Shelton, Paul; Novakofski, Jan; Mateus-Pinilla, Nohra.
Afiliación
  • Green ML; Department of Animal Sciences, University of Illinois at Urbana-Champaign, 205 Meat Science Laboratory, 1503 S. Maryland Drive, Urbana, IL 61801, USA; Illinois Natural History Survey, University of Illinois Urbana-Champaign, 1816 S. Oak Street, Champaign, IL 61820, USA. Electronic address: mlgreen@i
  • Kelly AC; Department of Animal Sciences, University of Illinois at Urbana-Champaign, 205 Meat Science Laboratory, 1503 S. Maryland Drive, Urbana, IL 61801, USA. Electronic address: amy.kelly@ars.usda.gov.
  • Satterthwaite-Phillips D; Illinois Natural History Survey, University of Illinois Urbana-Champaign, 1816 S. Oak Street, Champaign, IL 61820, USA. Electronic address: damian@phillips-research.com.
  • Manjerovic MB; Department of Animal Sciences, University of Illinois at Urbana-Champaign, 205 Meat Science Laboratory, 1503 S. Maryland Drive, Urbana, IL 61801, USA; Illinois Natural History Survey, University of Illinois Urbana-Champaign, 1816 S. Oak Street, Champaign, IL 61820, USA. Electronic address: mmanjerov
  • Shelton P; Division of Wildlife Resources, Illinois Department of Natural Resources, One Natural Resources Way, Springfield, IL 62702, USA. Electronic address: Paul.Shelton@Illinois.gov.
  • Novakofski J; Department of Animal Sciences, University of Illinois at Urbana-Champaign, 205 Meat Science Laboratory, 1503 S. Maryland Drive, Urbana, IL 61801, USA. Electronic address: jnova@illinois.edu.
  • Mateus-Pinilla N; Illinois Natural History Survey, University of Illinois Urbana-Champaign, 1816 S. Oak Street, Champaign, IL 61820, USA. Electronic address: nohram@illinois.edu.
Theriogenology ; 94: 71-78, 2017 May.
Article en En | MEDLINE | ID: mdl-28407863
Knowledge of reproductive characteristics of wild populations is necessary to inform responsible management decisions that promote herd health. As management, goals, and free-ranging populations change over time and landscapes, updated knowledge of reproductive characteristics are needed to inform responsible management practices. We estimated reproductive characteristics of female white-tailed deer in Illinois, including pregnancy rate, litter size, fetal growth and fetal sex ratio. We found maternal age to have an important influence on several reproductive factors. Approximately 66% of tested females (n = 3884) were pregnant and pregnancy rates increased with increasing maternal age, from 20.5% in fawns to 85.8% in adult deer. Litter size ranged from 1 to 5 fetuses per pregnant female. The average litter size was 1.9 ± 0.54 fetuses per pregnant female and also increased with age, from 1.2 in fawns to 2.0 in adults, respectively. Breeding season peaked in November with the mean estimated conception dates of fetuses varying with maternal age. Fawns conceived fetuses later in the breeding season (December 2) compared to yearlings and adults (November 11 and 8, respectively). We measured the body mass index (BMI) of all fetuses and found that litter size and female age influence fetal size. We found no bias in fetal sex ratio (average 1.0:1.0, male:female) but we observed a sex bias in fetal size (mean BMI male = 0.71, female 0.67) across all maternal age classes. A comparison of the current study and previous reports indicate that variation in maternal age within a population is an important driver of reproductive metrics, likely because maternal age and body size or condition are related. Furthermore, variation in resource availability will influence reproductive rates, especially among fawn females.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Reproducción / Ciervos Tipo de estudio: Prognostic_studies Límite: Animals / Pregnancy País/Región como asunto: America do norte Idioma: En Revista: Theriogenology Año: 2017 Tipo del documento: Article Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Reproducción / Ciervos Tipo de estudio: Prognostic_studies Límite: Animals / Pregnancy País/Región como asunto: America do norte Idioma: En Revista: Theriogenology Año: 2017 Tipo del documento: Article Pais de publicación: Estados Unidos