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Related Experiment Videos

Quantifying energy dissipation by grazing animals in harsh environments.

Raúl Cañas C1, Roberto A Quiroz, Carlos León-Velarde

  • 1Biotecnología Agropecuaria SA, PO Box 1558, Lima 12, Peru.

Journal of Theoretical Biology
|November 8, 2003
PubMed
Summary

Grazing animals dissipate energy during pasture harvesting, impacting production efficiency. This study quantifies energy dissipation as a function of available energy to improve livestock management strategies.

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Area of Science:

  • Animal Science
  • Agricultural Engineering
  • Ecology

Background:

  • Grazing systems in harsh environments are crucial for resource-poor farmers globally.
  • Animal production relies heavily on efficient energy conversion from pasture to product.
  • Understanding energy expenditure in grazing animals is key to optimizing production.

Purpose of the Study:

  • To develop a method for quantifying energy dissipation in grazing animals.
  • To analyze energy dissipation as a function of available pasture energy.
  • To inform management strategies for enhancing livestock conversion efficiency.

Main Methods:

  • Utilized an energy balance approach: Metabolizable Energy Intake (MEI) minus energy expenditures (maintenance, temperature regulation, production).

Related Experiment Videos

  • Quantified dissipated energy as the difference when MEI exceeds total energy expenditures.
  • Modeled energy dissipation as a function of available energy in the pasture.

    • Main Results:

    • Energy dissipation during grazing is directly linked to the energy expenditure in locomotion and stress due to low pasture availability.
    • The efficiency of converting consumed energy into animal products is inversely related to the magnitude of energy dissipation.
    • A method was presented to quantify this energy dissipation based on available energy.

    Conclusions:

    • Quantifying energy dissipation is essential for understanding and improving grazing animal production efficiency.
    • Management strategies should focus on mitigating energy loss associated with grazing in low-availability environments.
    • This research provides a framework for optimizing livestock production in challenging environments.