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The first successfully cloned mammal was Dolly, a sheep, born on 5th July 1996 at Roslin Institute, Scotland. The cloned sheep was named after the American singer Dolly Parton. Dolly lived for seven years and died of respiratory complications, which is speculated to be due to the actual age of her DNA. Because the DNA in cloned cells belongs to an older individual,  the cloned individual’s life expectancy may be affected. Indeed, analysis of Dolly’s DNA revealed shorter telomeres than other...

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Differences in behaviour between sheep and cattle during slaughter.

D K Blackmore

    Research in Veterinary Science
    |September 1, 1984
    PubMed
    Summary
    This summary is machine-generated.

    Differences in slaughter responses were observed between sheep and cattle. Cattle showed longer coordinated movements and later signs of cerebral hypoxia compared to sheep, suggesting distinct physiological responses during slaughter.

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    Area of Science:

    • Veterinary Science
    • Animal Physiology
    • Livestock Welfare

    Background:

    • Assessing animal insensibility during slaughter is crucial for welfare.
    • Previous studies suggest physiological differences between sheep and cattle during slaughter.

    Purpose of the Study:

    • To compare the observable physiological responses to slaughter between sheep and cattle.
    • To investigate differences in the onset of cerebral hypoxia indicators.

    Main Methods:

    • Slaughtering lambs, adult sheep, calves, and a young bull by severing carotid arteries and jugular veins.
    • Observing and comparing coordinated body movements and signs of cerebral hypoxia (clonic convulsions, pupillary dilation).

    Main Results:

    • Cattle (calves and bull) exhibited coordinated body movements for a significantly longer duration than sheep (lambs and adult sheep).
    • Signs associated with cerebral hypoxia, such as clonic convulsions and pupillary dilation, appeared earlier in sheep than in cattle.

    Conclusions:

    • Observable physiological responses during slaughter differ notably between sheep and cattle.
    • These findings support previous electroencephalographic (EEG) studies indicating distinct differences in insensibility onset between these species.