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Related Experiment Video

Updated: May 5, 2026

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Environmental sensitivity differs between rabbit lines selected for reproductive intensity and longevity.

D Savietto1, C Cervera, E Blas

  • 11 Institute for Animal Science and Technology (ICTA). Universitat Politècnica de València. Camino de Vera s/n, 46022 Valencia, Spain.

Animal : an International Journal of Animal Bioscience
|November 19, 2013
PubMed
Summary
This summary is machine-generated.

Rabbit does from two selection lines (LP and V) were tested in normal, nutritional, or heat stress conditions. LP does showed better milk yield and reproductive performance under stress than V does, indicating distinct adaptive strategies.

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Area of Science:

  • Animal Science
  • Reproductive Biology
  • Environmental Physiology

Background:

  • Understanding animal adaptation to environmental challenges is crucial for sustainable livestock production.
  • Rabbit production systems face challenges from heat stress and nutritional deficiencies, impacting doe productivity.
  • Selection lines with different genetic backgrounds may exhibit varied responses to environmental stressors.

Purpose of the Study:

  • To investigate the impact of normal (NC), nutritional deficiency (NF), and heat challenge (HC) environments on rabbit doe performance.
  • To compare the adaptive strategies of two rabbit selection lines (LP and V) under these challenging conditions.
  • To elucidate the relationship between energy intake, milk yield, perirenal fat thickness (PFT), and reproductive output.

Main Methods:

  • Two rabbit lines, LP (selected for longevity) and V (selected for litter size), were subjected to NC, NF, and HC conditions from first to third parturition.
  • Environmental conditions involved controlled temperature (18-24°C for NC/NF, 25-35°C for HC) and dietary energy levels (11.6 MJ DE/kg DM for NC/HC, 9.1 MJ DE/kg DM for NF).
  • Measurements included digestible energy (DE) intake, milk yield, perirenal fat thickness (PFT) dynamics, and litter size.

Main Results:

  • Both LP and V does reduced DE intake under NF and HC conditions, with LP does showing a greater reduction.
  • Milk yield was higher in LP does under challenging conditions, correlating with energy intake.
  • A significant genotype-by-environment interaction was observed for PFT; LP does utilized PFT reserves differently than V does, particularly under NC and HC, while V does showed reduced litter size in HC and NF.

Conclusions:

  • LP does demonstrate a strategy of direct energy utilization for reproduction with minimal PFT changes under stress.
  • V does appear to utilize perirenal fat reserves for reproduction, but this is associated with reduced litter size under challenging environments.
  • Selection criteria significantly influence rabbit doe adaptability to environmental stressors, highlighting the potential for breeding programs to enhance resilience.