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Feh, C .; BOLDSUKH, T.; TOURENQ, C. |
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Are family groups in equids a response to cooperative hunting by predators? The case of Mongolian Kulans (Equus hemionus luteus Matschie) |
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1994 |
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Revue d´ écologie (Terre et Vie) |
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Rev Ecol (Terre Vie) |
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49 |
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11-20 |
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1083 |
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Haughton Sh, C.B. |
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Title |
The fossil Equidae of south Africa |
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1931 |
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Ann South Afr Mus |
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28 |
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407-427 |
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from Professor Hans Klingels Equine Reference List |
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no |
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1166 |
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Hoyt Df, T.C. |
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Gait and the energetics of locomotion in horses |
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1981 |
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Nature |
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292 |
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239-240 |
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from Professor Hans Klingels Equine Reference List |
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no |
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1205 |
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Izraely, H.; Choshniak, I.; Shkolnik, A.; Stevens, C.E.; Demment, M.W. |
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Title |
Factors determining the digestive efficiency of the domesticated donkey.(Equus Asinus Asinus ) |
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1989 |
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Q J Exp Physiol |
Abbreviated Journal |
Q J Exp Physiol |
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74 |
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1 |
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1-6 |
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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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from Professor Hans Klingels Equine Reference List |
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yes |
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1216 |
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Nitschelm D, H.V.D.C. |
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The influence of chlormadinone acetate treatment on the concentration of some stereoids in the blood, on the ovarian activity and on.. |
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1977 |
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Tijdschr Diergeneesk |
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102 |
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861-872 |
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from Professor Hans Klingels Equine Reference List |
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no |
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1419 |
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Nitschelm D, H.V.D.C. |
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The influence of chlormadinone acetate treatment on the concentration of some stereoids in the blood, on the ovarian activity, and on the sexual behaviour of the.. |
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1977 |
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Tijdschr Diergeneesk |
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102 |
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61-872 |
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from Professor Hans Klingels Equine Reference List |
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no |
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1420 |
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PITRA, C.H.; STREICH, W.J.; REINSCH, A.; FICKEL, J. |
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Die Population des Somali-Wildesels (Equus africanus somalicus Sclater) in menschlicher Obhut: Demographische und genetische Aspekte |
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1995 |
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Zoologische Garten |
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Zool. Garten. |
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N.F. 65 |
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4 |
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245-257 |
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1472 |
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Author |
Robertshaw D, T.C. |
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Title |
Sweat gland function of the donkey |
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1969 |
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J Physiol |
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205 |
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79-89 |
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from Professor Hans Klingels Equine Reference List |
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no |
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1509 |
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Ruffner Ga, C.S. |
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Title |
Age structure, condition, and reproduction of two burro (Equus asinus) populations from Grand Canyon National Park, Arizona |
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1979 |
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Symposium on the Ecology and Behavior of wild and feral Equids, Laramie |
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235 |
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from Professor Hans Klingels Equine Reference List |
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no |
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1534 |
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Heyes, C.M.; Dawson, G.R. |
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A demonstration of observational learning in rats using a bidirectional control |
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1990 |
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Quarterly Journal of Experimental Psychology Section B: Comparative and Physiological Psychology |
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Q J Exp Psychol B |
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42 |
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1 |
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59-71 |
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appetite; attention; imitation; problem solving; psychomotor performance; Appetitive Behavior; Attention; Imitative Behavior; Problem Solving; Psychomotor Performance |
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Hungry rats observed a conspecific demonstrator pushing a single manipulandum, a joystick, to the right or to the left for food reward and were then allowed access to the joystick from a different orientation. The effects of right-pushing vs left-pushing observation experience on (1) response acquisition, (2) reversal of a left-right discrimination, and (3) responding in extinction, were examined. Rats that had observed left-pushing made more left responses during acquisition than rats that had observed right-pushing, and rats that had observed demonstrators pushing in the direction that had previously been reinforced took longer to reach criterion reversal and made more responses in extinction than rats that had observed demonstrators pushing in the opposite direction to that previously reinforced. These results provide evidence that rats are capable of learning a response, or a response-reinforcer contingency, through conspecific observation. |
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University of Cambridge, U.K. |
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02724995 (Issn) |
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Cited By (since 1996): 49; Export Date: 17 May 2007; Source: Scopus; Language of Original Document: English; Correspondence Address: Heyes, C.M. |
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1766 |
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