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Seasonal variation in the feeding ecology of black rhinoceros (Diceros bicornis L.) in Laikipia, Kenya

Daily indirect observations were made on the diet and feeding habits of the black rhinoceros (Diceros bicornis L.) on Ol Ari Nyiro Ranch, Laikipia, Kenya over a six-month period. Individual rhinos were followed along their feeding tracks, plants consumed by tracked animals were identified and herbivory quantified. In total, 9665 individual feeding points were recorded at 1967 feeding stations. At least 103 plant species from at least 37 families were identified as rhino food plants. The diet of black rhinos

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Comparative Use of Four Different Marker Systems for the Estimation of Digestibility and Low Food Intake in a Group of Captive Giraffes (Giraffa camelopardalis)

In a feeding trial with four captive giraffes, nutrient digestibility was determined using four different marker systems. Although cobalt-ethylenediaminetetraacetic acid proved to have no utility as a digestibility marker in this study, reasonable values could be obtained using C36 n-alkane, acid detergent lignin, and acid insoluble ash as markers. A comparison of methods and literature data suggests that the values derived from the C36 n-alkane assay are the most reliable absolute values. Apparent digestibility ranges thus determined were 63.5–74.3% for

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Regrowth and palatability of acacia shoots following pruning by African savanna browsers’

Stands of two species of African Acacia were monitored for 1 yr in a natural savanna ecosystem, to compare shoot regrowth and leaf chemistry in lightly browsed and heavily browsed trees. Where ungulates concentrated at a seasonal waterhole, A. nigrescens was more severely browsed than the thornier and finer leafed A. tortilis. Shoot regrowth in heavily browsed A. nigrescens more than compensated for herbivory, as net annual shoot extension was not significantly different from that in lightly browsed trees. Foliage

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