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The physiological basis of adaptation in goats to harsh environments
Year:
2000
Source of publication :
Small Ruminant Research
Authors :
Silanikove, Nissim
;
.
Volume :
35
Co-Authors:
Silanikove, N., Agric. Res. Organization Bet Dagan, Inst. Anim. Sci., PO Box 6, 50 250, Bet Dagan, Israel
Facilitators :
From page:
181
To page:
193
(
Total pages:
13
)
Abstract:
Goat living in harsh environments represents a climax in the capacity of domestic ruminants to adjust to such areas. This ability is multifactorial: low body mass, and low metabolic requirements of goats can be regarded as an important asset to them for it minimize their maintenance and water requirements, in areas where water sources are widely distributed and food sources are limited by their quantity and quality. An ability to reduce metabolism allows goats to survive even after prolonged periods of severe limited food availability. A skillful grazing behavior and efficient digestive system enable goats to attain maximal food intake and maximal food utilization in a given condition. There is a positive interaction between the better recycling rate of urea and a better digestion of such food in desert goats. The rumen plays an important role in the evolved adaptations by serving as a huge fermentation vat and water reservoir. The water stored in the rumen is utilized during dehydration, and the rumen serves as a container, which accommodates the ingested water upon rehydration. The rumen, the salivary glands and the kidney coordinately function in the regulation of water intake and water distribution following acute dehydration and rapid rehydration. Goats in the tropics, when possible, eat a diet composed of tree-leaves and shrubs (browse), which ensure a reliable and steady supply of food all year around, albeit, from a low to medium quality food. Some of the physiological features of ruminants defined as intermediate feeders like large salivary gland, the large absorptive area of their rumen epithelium, and the capacity to change rapidly the volume of the foregut in response to environmental changes are most likely respOnSible for the goat's superior digestion capacity. (C) 2000 Elsevier Science B.V.
Note:
Related Files :
adaptation
Fermentation
fluid balance
Goat
Grazing
harsh environment
Kidney
salivary gland
tropics
Show More
Related Content
More details
DOI :
10.1016/S0921-4488(99)00096-6
Article number:
Affiliations:
Database:
Scopus
Publication Type:
Review
;
.
Language:
English
Editors' remarks:
ID:
30938
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:58
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Scientific Publication
The physiological basis of adaptation in goats to harsh environments
35
Silanikove, N., Agric. Res. Organization Bet Dagan, Inst. Anim. Sci., PO Box 6, 50 250, Bet Dagan, Israel
The physiological basis of adaptation in goats to harsh environments
Goat living in harsh environments represents a climax in the capacity of domestic ruminants to adjust to such areas. This ability is multifactorial: low body mass, and low metabolic requirements of goats can be regarded as an important asset to them for it minimize their maintenance and water requirements, in areas where water sources are widely distributed and food sources are limited by their quantity and quality. An ability to reduce metabolism allows goats to survive even after prolonged periods of severe limited food availability. A skillful grazing behavior and efficient digestive system enable goats to attain maximal food intake and maximal food utilization in a given condition. There is a positive interaction between the better recycling rate of urea and a better digestion of such food in desert goats. The rumen plays an important role in the evolved adaptations by serving as a huge fermentation vat and water reservoir. The water stored in the rumen is utilized during dehydration, and the rumen serves as a container, which accommodates the ingested water upon rehydration. The rumen, the salivary glands and the kidney coordinately function in the regulation of water intake and water distribution following acute dehydration and rapid rehydration. Goats in the tropics, when possible, eat a diet composed of tree-leaves and shrubs (browse), which ensure a reliable and steady supply of food all year around, albeit, from a low to medium quality food. Some of the physiological features of ruminants defined as intermediate feeders like large salivary gland, the large absorptive area of their rumen epithelium, and the capacity to change rapidly the volume of the foregut in response to environmental changes are most likely respOnSible for the goat's superior digestion capacity. (C) 2000 Elsevier Science B.V.
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