Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Acetate metabolism in lactating sheep

D W Pethick, D B Lindsay

    The British Journal of Nutrition
    |September 1, 1982
    PubMed
    Summary
    This summary is machine-generated.

    Lactating sheep redirect acetate utilization from muscle to the mammary gland, with muscle glucose uptake decreasing significantly during lactation. Mammary gland metabolism in sheep mirrors that of cows and goats.

    Related Concept Videos

    You might also read

    Related Articles

    Articles linked to this work by shared authors, journal, and citation graph.

    Sort by
    Same author

    Association of sire breeding values for lean meat yield and eating quality attributes on the sensory perception of Australian lamb.

    Meat science·2026
    Same author

    The impact of lean meat yield on Australian lamb eating quality is partially driven by intramuscular fat.

    Meat science·2025
    Same author

    Consumer flavour liking contributes the most to sensory overall liking of Australian lamb.

    Meat science·2025
    Same author

    Oxygen concentration in MAP can be reduced with minimal impact on eating quality of lamb.

    Meat science·2024
    Same author

    The construction of a sheepmeat eating quality prediction model for Australian lamb.

    Meat science·2024
    Same author

    Changing Australia's trading language has enhanced the implementation of objective carcase measurement technologies.

    Meat science·2024

    Area of Science:

    • Animal physiology
    • Nutrient metabolism
    • Ruminant biochemistry

    Background:

    • Understanding nutrient partitioning is crucial for optimizing animal productivity.
    • Lactation significantly alters metabolic demands and nutrient utilization in ewes.
    • Previous studies have focused on dairy cows and goats, with less data available for sheep.

    Purpose of the Study:

    • To investigate the in vivo metabolism of acetate, glucose, and D(-)-3-hydroxybutyrate in lactating and non-lactating sheep.
    • To quantify nutrient utilization by hind-limb muscle and the lactating mammary gland.
    • To compare nutrient metabolism between lactating and non-lactating states and across species.

    Main Methods:

    • In vivo study of acetate, glucose, and D(-)-3-hydroxybutyrate metabolism in sheep.

    Related Experiment Videos

  • Measurement of nutrient uptake by hind-limb muscle and mammary gland.
  • Analysis of oxygen consumption and lactate production in muscle.
  • Quantification of mammary gland blood flow and nutrient extraction percentages.

    • Main Results:

    • Acetate entry into circulation was similar across groups, but muscle extraction decreased in lactation, with acetate being redirected to the udder.
    • Muscle glucose utilization (corrected for lactate release) fell from 57% in non-lactating to 32% in lactating ewes.
    • D(-)-3-hydroxybutyrate contributed 16-17% to muscle oxygen consumption in both states.
    • Lactating mammary gland extraction percentages were: glucose (25%), O2 (28%), acetate (62%), and D(-)-3-hydroxybutyrate (53%).

    Conclusions:

    • Lactation induces a significant shift in acetate utilization from muscle to mammary gland in sheep.
    • Muscle's reliance on glucose decreases during lactation, partly due to increased lactate production.
    • Mammary gland metabolism in sheep is comparable to that observed in dairy cows and goats, particularly for acetate uptake.