000			02690naa a22004697a 4500
003			CR-SiIICA
005			20200203203810.0
006			a|||||r|||| 00| 0
007			ta
008			920101e cr |||||r|||| 00| | eng d
040			_cCR-SiIICA
041			_aeng
090			_a636.084 M864 c.3
100			_944361 _aArnold, G.W.
100			_996761 _aMorley, F.H.W.
245			_aGrazing behaviour
245			_aGrazing animals
260			_aAmsterdam (Países Bajos) _bElsevier _c1981
270			_aCIDIA, Turrialba (Costa Rica)
300			_ap. 79-104
440			_9171511 _aWorld Animal Science (Países Bajos) _v(B1)
500			_aBib. p. 101-104
520			_aThe diurnal pattern of daily maintenance behaviour is determined by grazing, periods of rumination and rest occurring between periods of grazing. The primary determinant of when animals graze is daylength, with major grazing periods around dawn and dusk. However, temperature and humidity may alter the times that grazing periods begin and end. The time spent grazing depends on the physiological state of the animal, its age, and the availability of both herbage and supplementary feed. Dispersion of animals in an environment is influenced by a wide range of factors such as topography, location of shelter and water, weather conditions, and distribution of vegetation. Dispersion is rarely uniform, either during a day or over long periods of time. As a consequence, different areas of the same type of vegetation are utilised to quite different extents in the same paddock or range. Choice between types of vegetation and between plants species or parts of a plant is determined by the responses to chemical stimuli received through the animal's senses of smell, taste and touch. Little is known about these responses. An indication is given of the effect on acceptability of a plant or plant part of constituents such as sugars, organic acids, tannins and alkaloids. Differences between animals of different ages and breeds are small but different species may select different diets when grazing together. There seems to be litte good evidence to show that preferences are primarily motivated by nutritional wisdom
690			_9148417 _aFORRAJES
690			_9157692 _aPASTOREO
690			_9149924 _aHABITOS ALIMENTARIOS
690			_9164242 _aSELECTIVIDAD
690			_9141440 _aCOMPOSICION QUIMICA
901			_aF01 _b14800
902			_aL02
903			_aE
904			_aIICA
905			_aC
906			_a19920101
907			_aCIDIA, Turrialba (Costa Rica)
908			_aB
909			_aAMS
914			_aEXTRA
914			_aRISPAL
942			_cSER
942			_cIMP
999			_c17700 _d17700