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  • 2015-2019
  • 1995-1999
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  • 1
    facet.materialart.
    Unbekannt
    Elsevier
    In:  Deep-Sea Research, 4 . pp. 105-115.
    Publikationsdatum: 2020-11-09
    Beschreibung: Fourteen instances of whales entangled in submarine cables are reported. Ten entanglements occured off the Pacific coast of Central and South America. Six cases occured in about 500 fathoms, with 620 fathoms the maximum depth reported. Five entanglements occured in the period, Februray-March-April. All whales positively identified were sperm whales. The submarine cable was generally wrapped around jaw and often around the flukes and fins. The cable was rarely broken but always badly mauled. The entanglements often occured near former repairs where there is a chance for extra slack cable on the bottom. Two photographs of a sperm whale entangled in a cable and one photograph of a whale-jaw entangled in a cable are presented. It is concluded that sperm whales often swim alog the sea floor in depths as grat as 620 fathoms. It is suggested that the whales become entangled while swimming along with their jaw plowing through the sediment in search of food. It is possible that the whales attack tangled masses of slack cable mistaking them for items of food.
    Materialart: Article , PeerReviewed
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    facet.materialart.
    Unbekannt
    Oxford University Press
    In:  The Journal of Nutrition, 50 (4). pp. 459-467.
    Publikationsdatum: 2022-01-13
    Beschreibung: Comparable values have been obtained for endogenous fecal calcium in cattle by an “isotope dilution” method and a “comparative balance” method. Both procedures involve the use of labeled calcium, but they are different in principle. The “isotope dilution” method offers advantages in being independent of the availability of the dietary calcium and of the uncertainties of balance determinations.
    Materialart: Article , PeerReviewed
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
  • 3
    facet.materialart.
    Unbekannt
    Oxford University Press
    In:  The Journal of Nutrition, 50 (1). pp. 23-33.
    Publikationsdatum: 2022-01-13
    Beschreibung: Endogenous fecal calcium was estimated directly in normal cattle by a method which consisted of 10 daily intravenous injections of radiocalcium, comparison of the specific activities of blood and feces taken on the 4th to 8th day post-injection, and routine determination of calcium balance. The daily endogenous fecal values for three 8-year-old dairy cows averaged 7 gm and for two yearling Hereford steers about 4 gm. The endogenous fecal calcium was not significantly changed when the dietary calcium was varied from normal to a high level. In two animals on a low calcium diet a decrease in endogenous fecal calcium was indicated.
    Materialart: Article , PeerReviewed
    Format: text
    Standort Signatur Erwartet Verfügbarkeit
    BibTip Andere fanden auch interessant ...
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