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Hubbard Re, H. R. (1976). Diets of wild horses, cattles and mule deer in the Piceance Basin, Colorado. J Range Mgmt 29, , 389–392.
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Izraely, H., Choshniak, I., Shkolnik, A., Stevens, C. E., & Demment, M. W. (1989). Factors determining the digestive efficiency of the domesticated donkey.(Equus Asinus Asinus ). Q J Exp Physiol, 74(1), 1–6.
Abstract: Factors determining the digestive efficiency of donkeys were studied in animals fed either a low quality roughage (wheat straw: 77{middle dot}1% neutral detergent fibre, 2{middle dot}8% crude protein) or a high quality forage (alfalfa hay: 47{middle dot}5% neutral detergent fibre, 22{middle dot}7% crude protein). The neutral detergent fibre (NDF) intake when fed wheat straw was 1693 {+/-} 268 g animal-1 day-1, 10% higher than when fed alfalfa hay. Digestive coefficient of NDF and acid detergent fibre (ADF) when fed wheat straw amounted to 50{middle dot}9 {+/-} 4{middle dot}9 and 42{middle dot}0 {+/-} 4{middle dot}1% respectively. NDF and ADF apparent digestibilities and mean retention times (37{middle dot}7 {+/-} 1{middle dot}7 and 36{middle dot}4 {+/-} 3{middle dot}2 h respectively) were not significantly different (P [rang] 0{middle dot}05) between the two diets. The donkey appears to digest cell wall constituents as efficiently as the Bedouin goat when on low quality roughage, but less efficiently when fed alfalfa hay. Its energy digestibility is, however, as high as that reported for the Bedouin goat. The donkey's high energy digestibility is related to its capacity to digest soluble food components more efficiently than the ruminant. The mean retention time in the donkey is shorter than in the Bedouin goat and is consistent with its capacity to compensate for a lower quality diet by increasing its intake rate. Recycling of urea in donkeys maintained on wheat straw amounted to 75{middle dot}5 {+/-} 13{middle dot}0% of the entry rate. A decrease in the rate of renal urea filtration, coupled with an increase in the fraction reabsorbed, increased the retention of nitrogenous waste and permitted recycling of nitrogen into the gut. N1 -
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Kirkpatrick, J. F., Kasman, L. H., Lasley,, B. L., & Turner, J. W. J. (1988). Pregnancy Determination in Uncaptured Feral Horses. J Wildl Manag, 52(2), 305–308.
Abstract: The urinary excretion of estrone sulfate ($\text{E}{1}\text{S}$) by 25 free-roaming feral horses (Equus caballus) was measured by radioimmunoassay applied to extracts of urine-soaked soil. Twelve of 15 mares having $\text{E}{1}\text{S}$ concentrations >1.0 mg/mg creatinine (x = 2.64 +- 1.02 [SD]) produced foals. All 10 mares with $\text{E}{1}\text{S}$ concentrations <1.0 mg/mg creatinine (x = 0.44 +- 0.26) did not foal. Extracting urine from soil and measuring $\text{E}{1}\text{S}$ and creatinine can be used to determine pregnancy in free-roaming feral horses without the stress of capture or immobilization.
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King Jm, K. H. (1965). The use of the oripavine derivative M.99 for the restraint of equine animals and its antgonism with the related compund M.
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Klingel, H. (1967). Soziale Organisation und Verhalten freilebender Steppenzebras (Equus quagga). Z. Tierpsychol., 24(5), 580–624.
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Klingel, H. (1989). Odd-toed Ungulates, Horses. In B. Grzimek (Ed.), Grzimek's Encyclopedia of Mammals (Vol. 4, 550+pp. 557–594). McGraw Hill.
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Klingel, H. (1991). Dix ans parmi les zèbres. Terre Sauvage, 48, 34–43.
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Klingel, H. (1991). Tausend Zebras im Computer. Das Tier, 10, 8–16.
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Klingel, H. (1990). Kalameili – future home of the Przewalski horse? In S. Seifert (Ed.), Proceedings of the 5th International Symposium on the Preservation of the Przewalski Horse, Leipzig (pp. 221–224). Leipzig: Zoolog Garten.
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Kusunose R, S. H. (1984). The behavioral development of thouroughbred foals and the relationship between dams and foals. Jap J Zootechn Sci, 55, 263–271.
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