Comparative use of four different marker systems for the estimation of digestibility and low food intake in a group of captive giraffes (Giraffa camelopardalis)

Abstract 10.1002/zoo.1031.abs 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 […]

How energy and coavailable foods affect forage selection by the western grey kangaroo

We aimed to identify chemical properties of plant species that correlate with their palatability, quantify a common currency of forage for the western grey kangaroo, Macropus fuliginosus, and test the impact of frequency of occurrence on food selection. Of 24 plant species exposed to kangaroos, those high in salts and tannins were avoided, whereas those […]

Obese and lean Zucker rats demonstrate differential sensitivity to rates of food reinforcement in a choice procedure

The obese Zucker rat carries two recessive fa alleles that result in the expression of an obese phenotype. Obese Zuckers have higher food intake than lean controls in free-feed studies in which rats have ready access to a large amount of one type of food. The present study examined differences in obese and lean Zucker […]