Abstract
Problem statement: The Oryx antelope is a grazing ruminant of the Bovidae family. The macroscopic anatomy of the stomach in one adult Oryx dammah, an extinct species in the wild, was described. Approach: The stomach of the Oryx was composed of the four classic compartments of the ruminants. The weight of all the full stomach was 21.5 kg. The ruminal papillae were distributed unevenly in the rumen. Results: The maximum height of the cristae reticuli was 0.3 cm. The Cellulae reticuli were divided and contained secondary and tertiary crests. The Curvatura omasi measured 30.0 cm and the omasum had 15 primary, 9 secondary, 30 tertiary and 34 cuaternary Laminae omasi. The abomasum had about 17 Plicae spirales abomasi. Conclusion/Recommendations: We concluded that the stomach morphology of the Oryx had characteristics of the others grazing feeders ruminants. An important limitation of this study is the fact that we used only one animal, further studies of the digestive system of this species are necessary.
Highlights
The classification of ruminants into three groups according to their feeding types has been linked to anatomical studies, mainly of African, European and North American species (Hofmann, 1973; Dobson and Dobson, 1988)
In this study we described the stomach of one Scimitar-horned Oryx (Oryx dammah) of Tunicia, North Africa
According to our knowledge there is no available information on the macroscopic anatomy of the stomach of Oryx dammah
Summary
The classification of ruminants into three groups according to their feeding types (browsers, intermediate feeders, grazers) has been linked to anatomical studies, mainly of African, European and North American species (Hofmann, 1973; Dobson and Dobson, 1988).Hofmann (1973) dissected ten animals of the two east African subspecies of Oryx beisa. The classification of ruminants into three groups according to their feeding types (browsers, intermediate feeders, grazers) has been linked to anatomical studies, mainly of African, European and North American species (Hofmann, 1973; Dobson and Dobson, 1988). Oryx antelopes are the only predominantly grass eating ruminants in East Africa which are adapted to extreme arid conditions without surface water (Hofmann, 1973). According to the same author Madoqua kirkii and Litocranius walleri which thrive under similar conditions, are browsers and Nanger granti is an intermediate feeder. In this study we described the stomach of one Scimitar-horned Oryx (Oryx dammah) of Tunicia, North Africa. According to our knowledge there is no available information on the macroscopic anatomy of the stomach of Oryx dammah
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