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    Animal Science

    animal behavior
    animal nutrition
    animal genetics
    Created at: 27-09-2023
    Last updated: 13-12-2023
    366
    Heat stress, animal production, dairy cows, cattle, sheep, ewes, animal physiology and reproduction, ultrasound in dairy cow, protocol synchronization in dairy cattle

    Savani Anbalagan

    Tue Dec 12 2023

    Blindmen and an elephant: The need for animals in research, drug safety studies, and understanding civilizational diseases

    08:01

    Animal-based research and drug safety studies are essential to understanding the mysteries of nature and the long-term survival of humans. Due to the rapid increase in the global human population, conflict- and economically driven human migration, tourism-related activities, densely populated metropolitan areas, and local policies, humans will be affected by a multitude of novel disease-causing microorganisms and civilizational diseases. Despite disparities among countries, recent and planned changes in regulations concerning animal research and drug safety studies could have detrimental effects on both the animal research community and nations lacking sufficient social support systems. Based on existing scientific literature, I argue that depending on the nature of the research questions and local challenges, a suitable animal model organism should be made mandatory. Anbalagan S. Animal Model Exp Med. 2023 Dec 7. https://doi.org/10.1002/ame2.12364

    Matthias Corion

    Mon Nov 13 2023

    EggGuardians: Revolutionizing Poultry Welfare with In Ovo Sexing to Spare Male Chicks from a Grim Fate

    04:39

    The culling of day-old male chicks is an animal welfare issue within the laying hen industry that raises substantial ethical concerns. After 21 incubation days, hatched male chicks are separated from their female counterparts and are euthanized since they are genetically inefficient for meat production and have thereby no economic value. Hence, the industry is actively seeking alternative methods to identify and selectively incubate only female embryos. This method is called in ovo sexing and allows for a more humane approach to managing the population of male chicks. In this study, a robust and non-invasive in ovo color sexing technique using visible-near-infrared spectroscopy was developed and validated. Prediction accuracies for this high-throughput approach ranged up to 99% on day 13 of incubation. This advancement not only addresses ethical concerns but also boosts hatchery efficiency, fostering sustainability and improved animal welfare standards.

    Yvette Steyn

    Fri Oct 27 2023

    The Importance of historically popular sires on the genetic composition of recent animals in the US Holstein population

    05:35

    The dairy industry is known for its extensive use of reproductive biotechnology, which has allowed a small number of bulls to have a disproportionately large genetic contribution to the population. Some bulls have even produced millions of semen doses around the world and are known by name. The question arises whether their information is still relevant to the population today. The quest is on to find those individuals that are more important and shaped our population. My study used DNA information on over 500 thousand US Holsteins and more than 10 million records to explore the genetic importance of bulls that have produced the progeny in the population. I also identified the bulls that have the greatest genetic impact on recent populations. Read the paper to find out who these bulls are.

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