Effects of acute heat stress on changes in the rate of liquid flow from the rumen and turnover of body water of swamp buffalo

Abstract

549Effects of acute heat stress on changes in the rate of liquid flow from the rumen and turnover of body water of swamp buffalo SUMMARY During 5 h of acute heat exposure (41 °C), there were increases in the heart rate from 43±2 (S.E.) to 51 ± 1 beats/min, respiratory rate from 26±4 to 86± 16 breaths/min and rectal temperature from 385 + 0 1 °C to 39-7 + 0-2 °C. The flow rate of liquid from the rumen and body water turnover significantly increased while biological half life of ehromium-51 ethylenediaminetetra-acetate in the rumen and tritiated water decreased from 12-9±2-5 and 87-7 + 6-8 h to 9-3±20 and 49-2±5

The effects of high temperature and wallow on physiological responses of swamp buffaloes (Bubalus bubalis) during winter season in Thailand

“…Since the THI during the experimental period is well above the critical value of 72 (Johnson, 1985), the buffalo heifers of the present experiment would be thermally stressed (Du Preez et al, 1990;Bouraoui et al, 2002) before and during the period of study. The heat stressed buffaloes in the current study exhibited a markedly higher mean rectal temperature (Table 4) than that of non-heat stressed buffaloes reported in previous studies (37.9 1C (Bunyavejchewin et al, 1985) and 38.5 1C (Chaiyabutr et al, 1987)). …”

“…There are reports indicating that milk yield, growth and fertility of both cattle (De Rensis and Scaramuzzi, 2003;Khongdee et al, 2010) and swamp buffalo (Marai and Habeeb, 2010) are all reduced during periods of high ambient temperature. Each of these variables shows a direct relationship with rectal temperature (Goswani and Nair, 1964), for example, there were increases in rectal temperature from 38.5 to 39.7 1C when swamp buffalo and cows (340-375 kg, 4-7 years old) were subjected to acute heat exposure (41 1C; without wallow) for 5 h (Chaiyabutr et al, 1987).…”

Buffalo's biological functions as affected by heat stress — A review

“…However, other researchers either did not detect significant difference between the stressed and unstressed Friesian bulls in plasma insulin concentration (McVeigh and Tarrant, 1989) or reported an increase in insulin levels during exposure to elevated temperature (Chaiyabuter et al, 1987). Chaiyabuter et al (1987) added that the increase in insulin levels during exposure to elevated temperature was correlated with a marked increase in plasma glucose level. Such increase may be related to the action of glucocorticoids.…”

Thermoregulation and water balance in fat-tailed sheep and Kacang goat under sunlight exposure and water restriction in a hot and dry area

“…Previous studies have shown that the water content in the rumen tends to increase when water consumption increases, and the water turnover rate accelerates in goat (Silanikove, 1989), sheep (Degen and Shkolnik, 1978), cows (Silanikove and Tadmore, 1989) and swamp buffalo (Chaiyabutr et al, 1987). The increased water content in the rumen was used to counterbalance water losses from the systemic fluid during dehydration.…”