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Copper, Zinc and Molybdenum in Livers of Norwegian Cattle At Slaughter

Kobber, sink og molybden i leuer fra norsk storfeslakt.

Acta Veterinaria Scandinavica volume 21, pages 62–70 (1980)Cite this article

Abstract

The concentrations of copper, zinc and molybdenum were measured in samples of cattle liver from 10 slaughter-houses in Norway. A total of 335 samples were analysed. A clear accumulation of copper with age was found, the average copper level in the younger animals (≦ 3 years, n = 194) being 30 µg Cu/g liver wet weight, and in the older ones (> 3 years, n = 141) 59 µg Gu/g. The range in the copper values found was considerable, though significant differences between some of the districts were recorded. Copper concentrations were classified as low (≦10 µg Gu/g) in 9.6 % of the samples. Zinc showed no accumulation with age, nor were there any differences in zinc levels found in animals from different districts, the average level being 32 µg Zn/g liver wet weight. The picture was the same for molybdenum, no differences between age groups or districts being found. The average level was 1.0 µg Mo/g liver. There was no significant correlation between levels of copper, zinc or molybdenum.

The supply of copper and zinc to cattle in Norway seems close to sufficient, but copper- and zinc-fortified mineral supplementation of cattle feed is still to be recommended. There seems to be no need for molybdenum supplementation in cattle.

Sammendrag

Det ble samlet i alt 335 leverprøver fra storfe ved 10 forskjellige slakterier i Norge. Dyrenes alder ble anslått ved kjøttkontrollen. Alle prøvene ble analysert med hensyn på kobber og sink. Molybdeninnholdet ble bestemt i 69 prøver. For alle distriktene ble det påvist en klar kobberakkumulering med alderen. Gjennomsnittsnivået for unge dyr (≦ 3 år, n = 194) var 3ø µg Cu/g lever våtvekt, mens det for eldre dyr (> 3 år, n = 141) var 59µg Cu/g lever. Det var en betydelig spredning i kobbernivåene i leverprøvene fra de forskjellige slakteriene. For unge dyr slaktet i Bodø og Stavanger var alikevel kobbernivåene signifikant lavere enn i unge dyr slaktet ved andre slakterier. I 9,6 % av prøvene må kobbernivåene klassifiseres som lave (≦ 10 µg Gu/g). For sink ble det ikke funnet noen akkumulering med alderen. Det ble heller ikke funnet noen forskjeller i sinknivået i prøvene fra de forskjellige distriktene. Det gjennomsnittlige sinknivået var 32 µg Zn/g lever våtvekt. Heller ikke for molybden ble det funnet noen aldersakkumulering eller noen forskjeller mellom distriktene. Det gjennomsnittlige molybdennivået var 1,0 µg Mo/g lever. Det ble ikke funnet noen korrelasjon mellom konsentrasjonene av kobber, sink eller molybden i prøvene.

Tilskuddet av kobber og sink til storfe i Norge er nær opp til behovet, men det må fortsatt anbefales å bruke mineralblandinger tilsatt kobber og sink. Det synes ikke å være noe behov for tilskudd av molybden til storfe.

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  1. National Veterinary Institute, Oslo, Norway

    Arne Frøslie, Gunnar Norheim & Erling Waasjø

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  1. Arne Frøslie
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  2. Gunnar Norheim
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  3. Erling Waasjø
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Frøslie, A., Norheim, G. & Waasjø, E. Copper, Zinc and Molybdenum in Livers of Norwegian Cattle At Slaughter. Acta Vet Scand 21, 62–70 (1980). https://doi.org/10.1186/BF03546901

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Acta Veterinaria Scandinavica

ISSN: 1751-0147