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Titolo:
The physiological basis of adaptation in goats to harsh environments
Autore:
Silanikove, N;
Indirizzi:
Agr Res Org, Inst Anim Sci, IL-50250 Bet Dagan, Israel Agr Res Org Bet Dagan Israel IL-50250 im Sci, IL-50250 Bet Dagan, Israel
Titolo Testata:
SMALL RUMINANT RESEARCH
fascicolo: 3, volume: 35, anno: 2000,
pagine: 181 - 193
SICI:
0921-4488(200003)35:3<181:TPBOAI>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
TANNIN-CONTAINING LEAVES; DESERT BLACK BEDOUIN; SWISS SAANEN GOATS; INFREQUENT DRINKING; DAILY SUPPLEMENTATION; NITROGEN-METABOLISM; POLYETHYLENE-GLYCOL; CERATONIA-SILIQUA; MOROCCAN GOAT; ENERGY-INTAKE;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
92
Recensione:
Indirizzi per estratti:
Indirizzo: Silanikove, N Agr Res Org, Inst Anim Sci, POB 6, IL-50250 Bet Dagan, Israel Agr Res Org POB 6 Bet Dagan Israel IL-50250 t Dagan, Israel
Citazione:
N. Silanikove, "The physiological basis of adaptation in goats to harsh environments", SMALL RUMIN, 35(3), 2000, pp. 181-193

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 minimise 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 behaviour and efficient digestive system enable goats to attain maximal food intake and maximal food utilisation 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 ahuge fermentation vat and water reservoir. The water stored in the rumen is utilised 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 intakeand water distribution following acute dehydration and rapid rehydration. Goats in the tropics, when possible, eat a diet composed of tree-leaves andshrubs (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. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/09/20 alle ore 15:40:58