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Net production efficiency (NPE) is the efficiency at which organisms assimilate energy into biomass for the next trophic level. Due to low metabolic rates and less energy spent on thermoregulatory processes, the NPE of ectotherms (cold-blooded animals) is 10 times higher than endotherms (warm-blooded animals).
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Strain improvement is a foundational strategy in industrial microbiology aimed at maximizing microbial productivity, particularly because natural isolates typically yield commercially valuable products in very low concentrations. Although optimizing the culture medium and environmental conditions can improve yields, these adjustments are inherently limited by the organism’s genetic potential. As a result, the focus shifts toward genetic modifications to enhance biosynthetic capacity. The...
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Optimizing growth media enhances microbial proliferation and maximizes product yield. Statistical experimental design methodologies provide structured and reproducible approaches, offering progressively higher levels of robustness and efficiency.The One-Factor-at-a-Time (OFAT) MethodThe One-Factor-at-a-Time (OFAT) method involves adjusting a single variable while keeping all others constant. However, it cannot detect interactions between variables, often leading to suboptimal outcomes when...
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Upstream processing represents a critical phase in biomanufacturing, wherein biological systems such as microorganisms, mammalian cells, or insect cells are cultivated to produce therapeutic proteins, vaccines, enzymes, or other biologically derived products. This phase encompasses all steps from the selection and genetic manipulation of the production organism to the cultivation of cells in bioreactors under tightly controlled environmental conditions.Host Selection and Genetic OptimizationThe...
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Related Experiment Video

Updated: Mar 22, 2026

Author Spotlight: Improving Beef Cattle Nutrition and Production with a Focus on Feed Efficiency and Meat Quality Traits Through Advanced Biochemical and Molecular Assays
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Author Spotlight: Improving Beef Cattle Nutrition and Production with a Focus on Feed Efficiency and Meat Quality Traits Through Advanced Biochemical and Molecular Assays

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Improving efficiency in meat production.

John M Brameld1, Tim Parr1

  • 1School of Biosciences,University of Nottingham,Loughborough,Leics LE12 5RD,UK.

The Proceedings of the Nutrition Society
|April 19, 2016
PubMed
Summary

Improving animal growth efficiency is crucial for sustainable food production. This review explores enzyme additives, growth promoters, and transcriptomics to enhance livestock feed utilization and product quality.

Keywords:
BA β-adrenergic agonistsEU European UnionEnzymesFCR feed conversion ratioFE feed efficiencyFeed efficiencyGH growth hormoneGM genetic manipulationGrowth promotersMeatRFI residual feed intake

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Area of Science:

  • Animal Science
  • Nutritional Biochemistry
  • Genetics

Background:

  • Selective breeding and nutrition have boosted pig and poultry growth efficiency using human-edible feedstuffs.
  • Ruminants are less efficient, often consuming lower-quality feedstuffs unsuitable for humans.
  • Balancing feed resources for growing human populations, biofuels, and livestock is a key challenge.

Purpose of the Study:

  • To explore strategies for maintaining pig and poultry growth efficiency with alternative feed ingredients.
  • To investigate methods for improving ruminant growth efficiency.
  • To examine approaches for producing high-quality animal products while addressing feed resource competition.

Main Methods:

  • Review of enzyme additives to enhance feed digestibility.
  • Discussion of growth-promoting agents (growth hormone, β-agonists, anabolic steroids) and their global usage.
  • Analysis of transcriptomic studies on molecular mechanisms for improved growth efficiency, including low residual feed intake.
  • Consideration of genetic manipulation in livestock.

Main Results:

  • Enzyme additives can improve feed digestibility in livestock.
  • Growth promoters, though regulated, influence animal growth.
  • Transcriptomic research reveals molecular pathways linked to feed efficiency.
  • Genetic manipulation offers potential for enhanced growth traits.

Conclusions:

  • Integrating enzyme additives, understanding growth promoters, and leveraging transcriptomics are vital for sustainable animal agriculture.
  • Optimizing ruminant efficiency and utilizing non-human-edible feedstuffs are critical.
  • Future research should focus on genetic and molecular strategies for improved livestock growth and product quality.