The effect of the dietary plane upon the reactions of two breeds of sheep during short exposures to hot environments

1950 ◽  
Vol 1 (2) ◽  
pp. 217 ◽  
Author(s):  
RF Riek ◽  
MH Hardy ◽  
DHK Lee ◽  
HB Carter
Keyword(s):  
Respiratory Rate ◽  
Air Temperature ◽  
Rectal Temperature ◽  
Vapour Pressure ◽  
Experimental Period ◽  
Water Losses ◽  
Evaporative Water ◽  
Respiratory Volume ◽  
Average Maximum ◽  
C 30

Five Camden Park Merino and six Corriedale ewes, each breed divided into three groups and offered the food corresponding respectively to high, medium, and low dietary levels, were exposed for seven hours a day, one to three days a week, to each of several selected hot atmospheres over a range of temperatures 30 to 45°C, and a range of vapour pressures 15 to 40 mm.Hg. Observations were made on the rectal temperature, pulse rate, respiratory rate, respiratory volume, evaporative water loss, food and water consumption, body weight, and behaviour. These sheep were relatively tolerant of the hot conditions, only the highplane Corriedales having to be removed before the completion of the seven hours' exposure from the atmosphere 40°C./40 mm.Hg., with a rectal temperature over 107° F. A sharp rise in respiratory rate followed commencement of the exposure, the rate in the Merino being the higher under all hot conditions above the mildest (300 °C./30 mm.Hg.). The average maximum rates obtained for four sheep were 370/min. for the Merinos and 290/min. for the Corriedales. Pulse rates showed little change from normal rates of 60-65min. until air temperate or humidity reached high levels. The rise in vapour pressure at an air temperature of 40°C., which produced the same effect as a rise of 1°C. in air temperature at a vapour pressure of 30 mm.Hg., was 0.25 mm.Hg. for rectal temperature, 1.7 mm.Hg. for respiratory rate, and 2.3 mm.Hg. for respiratory volume. A high-plane diet reduced the heat tolerance of sheep, and heavy individuals actually lost weight during the experimental period. A very low diet, on the other hand, also impaired heat regulation, probably as part of a general depression of function. Sheep on a medium-plane diet fared best. It is difficult to account for observed water losses under hot conditions unless sweating is admitted.

The effect of increased rectal temperature on nitrogen metabolism in Brahman cross and Shorthorn × Hereford steers fed on a low nitrogen roughage

1970 ◽  
Vol 21 (5) ◽  
pp. 857 ◽  
Author(s):  
JE Vercoe ◽  
JE Frisch
Keyword(s):  
Urinary Excretion ◽  
Nitrogen Metabolism ◽  
Rectal Temperature ◽  
Water Losses ◽  
Fixed Amount ◽  
Evaporative Water ◽  
Urea Nitrogen ◽  
Dry Matter Digestibility ◽  
Collection Period ◽  
Low Nitrogen

A study was made of the effect of increasing the rectal temperature on nitrogen metabolism in Brahman cross and British cross steers offered a fixed amount of a low nitrogen roughage. Increasing the rectal temperature by c. 1.3�C in either breed slightly depressed intake, increased the dry matter digestibility by a small but statistically significant amount, and had no effect on the nitrogen digestibility. It did not significantly increase the urinary excretion of total nitrogen or urea nitrogen over the whole collection period, but over the last 5 days there were increases in the urinary total and urea nitrogen excreted per day which in most cases were significant. Increasing the rectal temperature significantly increased the urinary excretion of creatinine. The ambient temperature at which rectal temperatures were increased by 1.3�C was 35�C for the British cross steers and 43' for the Brahman cross steers. At the increased rectal temperature, the Brahman cross steers drank significantly more water than the British cross steers although faecal and urinary water losses were not significantly different. The calculated evaporative water loss was higher in the Brahman cross steers than in the British cross steers when both breeds were heated.

scholarly journals Physiological Response of Reared Bali Cattle Based on Different Peat Land Characteristics

2020 ◽  
Vol 5 (1) ◽  
pp. 12-21
Author(s):  
H. Hermawansyah ◽  
S. Salundik ◽  
Rudy Priyanto
Keyword(s):  
Wind Speed ◽  
Respiratory Rate ◽  
Air Temperature ◽  
Rectal Temperature ◽  
Physiological Response ◽  
Physiological Responses ◽  
Dry Land ◽  
Central Kalimantan ◽  
Humidity Index ◽  
Microclimate Conditions

This study aimed to investigate the effect of microclimate conditions within cattle houses at wet peatlands and dry peatlands on Bali cow's physiological responses.  The study was carried out from November 2017 to February 2018 in Pulang Pisau Regency, Central Kalimantan Province. There were 58 heads of Bali cows used in this study, comprising 38 cattle at wet peatland in Jabiren Raya sub-district and 20 animals at a dry bog in Maliku sub-district. The observed parameters included microclimate conditions. It was air temperature, humidity, and temperature-humidity index, THI and wind speed, physiological responses (respiratory rate, pulse, and rectal temperature) and leucocyte (neutrophils, lymphocytes, and neutrophils/lymphocytes ratio). The results indicated that the morning microclimate at wet peatland showed significantly (p<0.05) lower humidity, higher THI, and wind speed than that at dry land. The marked difference of microclimate between the two locations in the afternoon occurred only on wind speed.  There were differences between dry and wet peatlands in Bali cow's physiological responses, including respiration rate in the morning, the pulse at noon, rectal temperature in the afternoon, and leucocyte.  However, the local cattle' physiological responses kept in wet and dry peatland were still under normal conditions.

Sweating in cattle. II. Cutaneous evaporative loss measured from limited areas and its relationship with skin, rectal, and air temperatures

1959 ◽  
Vol 52 (1) ◽  
pp. 50-61 ◽  
Author(s):  
G. C. Taneja
Keyword(s):  
Skin Temperature ◽  
Air Temperature ◽  
Rectal Temperature ◽  
Water Losses ◽  
Air Temperatures ◽  
Evaporative Loss ◽  
Cutaneous Evaporation ◽  
The University ◽  
Skin Temperatures

1. Three female calves (Shorthorn, Zebux Australian Illawara Shorthorn, and American Brahman) of about 7–8 months old were exposed to different combinations of wet- and dry-bulb temperatures in the psychrometric chamber at the Physiology Department of the University of Queensland.2. A capsule method has been developed for measurement of cutaneous evaporation from limited areas. This method has been described in detail.3. Cutaneous evaporation from the shoulder area of the Zebu cross was significantly higher than that of the Shorthorn. There was, however, no difference between the two animals in their cutaneous evaporation from the belly area.4. In the Zebu cross the cutaneous water losses from the shoulder area, on the average, increased linearly with increase in skin temperature. In the Shorthorn, there was no important increase in the cutaneous evaporation from the shoulder area, although the skin temperature increased by about 2–3/ F.5. The Zebu cross had lower skin temperatures of the shoulder area when compared with that of the Shorthorn. These lower skin temperatures were associated with higher cutaneous evaporation.6. Increase in rectal temperature was not accompanied by increase in cutaneous evaporation in all the three animals studied.7. In all the three calves the cutaneous evaporation increased with increase in air temperature.

The influence of shade on milk production of Holstein-Friesian cows in a tropical upland environment

1988 ◽  
Vol 28 (2) ◽  
pp. 149 ◽  
Author(s):  
TM Davison ◽  
BA Silver ◽  
AT Lisle ◽  
WN Orr
Keyword(s):  
Milk Yield ◽  
Rectal Temperature ◽  
Somatic Cell Count ◽  
Experimental Period ◽  
Milk Composition ◽  
Holstein Friesian ◽  
Average Maximum ◽  
Fat Yield ◽  
Daily Milk ◽  
Friesian Cows

Sixteen Holstein-Friesian animals, comprising 8 multiparous cows and 8 first-lactation heifers, were divided into 2 equal groups which had access to either tree shade or no shade. All animals were in the first third of lactation and were subjected to treatment for 8 weeks in summer 1985. Average maximum monthly temperatures ranged from 26.2 to 28.22� over the experimental period. The provision of shade increased (P< 0.01) milk yield; however, there was a significant (P<0.05) interaction between response to shade and cow parity. Mean daily milk yields for multiparous cows were 19.2 and 17.2 kg/cow (P< 0.01) and 16.3 and 15.9 kg/cow (P> 0.05) for heifers in the shade and no shade groups respectively. Cows without shade incurred a significant decrease (P< 0.05) in solids-not fat yield, lactose percentage and lactose yield, and a significant increase ( P < 0.05) in somatic cell count. The composition of milk from heifers without shade was no different from that from heifers with shade. Rectal temperature was higher (P < 0.01) in animals without shade (mean 40.0�C) than in animals with shade (mean 39.4�C). The highest mean maximum rectal temperature of 41.6�C was recorded in the noshade group. It was concluded that shade is essential if milk yield and milk composition are to be maximised in this environment.

The water metabolism of a small East African antelope: the dik-dik

1973 ◽  
Vol 184 (1075) ◽  
pp. 167-178 ◽  
Keyword(s):  
Respiratory Rate ◽  
Laboratory Experiments ◽  
Water Exchange ◽  
Urine Osmolality ◽  
Water Metabolism ◽  
East African ◽  
Water Losses ◽  
Evaporative Water ◽  
Air Temperatures ◽  
Cutaneous Evaporation

1. In controlled laboratory experiments, rectal temperature, cutaneous moisture evapora­tion, and respiratory rate were studied in the dik-dik. The water balance of the dik-dik was investigated when the antelope were either fully hydrated or dehydrated at the environ­mental temperature of 22 °C or at temperatures alternating between 22 °C and 40 °C at 12 h intervals. 2. Faecal, urinary and evaporative water losses were all reduced by varying degrees during dehydration at 22 °C and 22 to 40 °C. The highest urine osmolality recorded was 4318 ± 105 mosmol/kg H 2 O which occurred when the antelopes were severely dehydrated. 3. At the high air temperatures (40 to 45 °C) cutaneous evaporation measured with a non-ventilated sweat capsule was 19 g H 2 O m -2 h -1 and the respiratory rate over 360/min. Thus the respiratory tract seems to be the major avenue for dissipating excess heat in dik-dik exposed to thermal stress. Injection of adrenaline, intravenously, stimulated sweat dis­charges similar to those observed in the small gazelles, and sheep and goats. 4. The low-water exchange and an efficient kidney helps explain the ability of this small antelope to inhabit hot arid areas.

scholarly journals Energy Supplementation during the Last Third of Gestation Improves Mother–Young Bonding in Goats

Animals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 287
Author(s):  
Juan M. Vázquez-García ◽  
Gregorio Álvarez-Fuentes ◽  
Héctor O. Orozco-Gregorio ◽  
Juan C. García-López ◽  
Milagros González-Hernández ◽  
...  
Keyword(s):  
Heart Rate ◽  
Birth Weight ◽  
Respiratory Rate ◽  
Rectal Temperature ◽  
First Feeding ◽  
Labor Duration ◽  
Daily Energy ◽  
Energy Supplementation ◽  
Birth Body Weight ◽  
Birth Type

We tested whether maternal energy supplementation during the last third of gestation improves birth weight, neonatal wellbeing, and mother–young bonding. Thirty-six pregnant French Alpine goats were randomly allocated among three nutritional treatments for the last third of pregnancy: (i) Control, fed alfalfa (T-0; n = 12); (ii) alfalfa + 150 g/head daily energy concentrate (T-150; n = 12); (iii) alfalfa + 300 g/head daily energy concentrate (T-300; n = 12). At birth, we collected progeny data on birth weight, birth type, sex, rectal temperature, heart rate, respiratory rate, time to standing, time to udder connection, and time to first feeding. For the dams, we collected data on the duration of labor, time to clean the progeny, and time to allow first suckling. At birth, body weight, rectal temperature, heart rate, and the respiratory rate did not differ among treatments (p > 0.05). In the dams, labor duration was not affected by the treatments (p > 0.05). The T-150 dams were faster to clean the newborn and allow first suckling (p < 0.05). The T-150 progeny were faster to stand and the T-300 progeny were faster to connect to the udder (p < 0.05). We conclude that energy supplementation of the dam during the last third of gestation does not affect the birth weight of the progeny, but enhances the mother–young bonding.

scholarly journals Monitoring of physiological and blood parameters during perinatal and neonatal period in calves

2010 ◽  
Vol 62 (1) ◽  
pp. 1-12 ◽  
Author(s):  
G. Piccione ◽  
S. Casella ◽  
P. Pennisi ◽  
C. Giannetto ◽  
A. Costa ◽  
...  
Keyword(s):  
Heart Rate ◽  
Respiratory Rate ◽  
Total Cholesterol ◽  
Rectal Temperature ◽  
Neonatal Period ◽  
Blood Parameters ◽  
External Jugular Vein ◽  
Individual Values ◽  
Functional Development ◽  
Adaptation Processes

Rectal temperature, heart and respiratory rates, and the course of some blood parameters were monitored in calves during perinatal and neonatal periods. The study was carried out on eight Limousine calves. From all subjects, rectal temperature, heart rate, and respiratory rate were measured. Blood samples were taken at the same hour (9am) from the external jugular vein, and then centrifuged and stored until analyses. By means of an UV spectrophotometer, the following blood parameters were assessed for each subject: total protein, total cholesterol, triglycerides, glucose, non-esterified fatty acids (NEFA), urea, creatinine, cholinesterase, lactate dehydrogenase (LDH), hydroxybutirate, glutamate pyruvate transaminases (GPT), glutamate oxalacetate transaminases (GOT), direct and total bilirubin, magnesium, iron, potassium, phosphorus, chloride and sodium. The results showed a significant effect of days of life (P<0.05) only on total cholesterol, creatinine and GOT during the first week of life and a significant effect of days of life on rectal temperature, heart rate, respiratory rate, total cholesterol, NEFA, creatinina, and GOT during the first month of life. A correlation among individual values for postnatal age (days of life) and heart rate in calves during the first month of life was observed. In conclusion, modifications of studied parameters could be attributed to functional development of calves in neonatal period and contribute to the knowledge of adaptation processes in calf during the first week and the first month of life resulting useful for the diagnosis and treatment of any neonatal diseases.

Lactic Acidosis in Children—Pathophysiology, Diagnosis, and Treatment: A Workbook Exercise

1983 ◽  
Vol 4 (7) ◽  
pp. 225-230
Author(s):  
Marc Yudkoff ◽  
Fred Burg
Keyword(s):  
Case Report ◽  
Lactic Acidosis ◽  
Emergency Room ◽  
Respiratory Rate ◽  
Rectal Temperature ◽  
Opportunity To Learn ◽  
Male Infant ◽  
Diagnosis And Treatment

This article is designed to give you an opportunity to learn how lactic acidosis affects children, and how to diagnose and treat a child with this disorder. The process we have utilized is an interactive one in which you will be presented with questions commingled with problems and discussion. CASE REPORT A 3-month-old male infant had been well until two days prior to admission, when he had developed fever, vomiting, and diarrhea. Initially the vomiting and diarrhea were mild, and a pediatrician recommended administration of clear liquids. On the day of admission the infant ate nothing at all, vomited every one to two hours, and had more than ten stools, all of which consisted primarily of water. The parents reported that by 5 PM the child became suddenly pale and his skin seemed cool, although when they took the rectal temperature it was 37.7 C(100 F). The baby became increasingly lethargic and limp. By 6 PM, when the parents rushed the child to the emergency room, he could not be awakened at all. The receiving physician in the emergency room found an unresponsive flaccid baby with a respiratory rate of 62 breaths per minute. A feeble pulse was 154 beats per minute and the rectal temperature was 38.1 C. The odor of acetone was apprent in the baby's breath.

Acclimatization of calves to a hot dry environment

1959 ◽  
Vol 52 (3) ◽  
pp. 296-304 ◽  
Author(s):  
W. Bianca
Keyword(s):  
Heart Rate ◽  
Respiratory Rate ◽  
Rectal Temperature ◽  
Heat Production ◽  
Metabolic Heat Production ◽  
Metabolic Heat ◽  
Physiological Reactions

1. Three calves were individually exposed in a climatic room to an environment of 45° C. dry-bulb and 28° C. wet-bulb temperature for 21 successive days up to 5 hr. each day.2. In the 21-day period, mostly during the first half of it, the following changes in the physiological reactions of the animals were observed: progressive reductions in rectal temperature, in heart rate and in respiratory rate with a change of breathing from a laboured to a less laboured type.3. It was suggested that a decrease in metabolic heat production might play a part in the observed acclimatization.

scholarly journals The ship of the desert. The dromedary camel (Camelus dromedarius), a domesticated animal species well adapted to extreme conditions of aridness and heat

Rangifer ◽  
1990 ◽  
Vol 10 (3) ◽  
pp. 231 ◽  
Author(s):  
S. Bornstein
Keyword(s):  
Animal Species ◽  
Physiological Adaptation ◽  
Dromedary Camel ◽  
Large Animal ◽  
Water Losses ◽  
Evaporative Water ◽  
Ambient Temperatures ◽  
Adaptive Mechanisms ◽  
Adaptation To Heat ◽  
Arabian Camel

The dromedary camel (Camel dromedarius) is extremely well adapted to life in hot and arid lands. In terms of physiological adaptation to heat and water deprivation it surpasses by far every other large animal of which data have been collected. None of the adaptive mechanisms to cope with the environmental stresses are unique to the Arabian camel, but the efficiency of its adaptation is superior. At high ambient temperatures the camels adapt to the scarcity of water by reducing their faecal, urinary and evaporative water losses. During dehydration, the kidneys reduce water losses both by decreasing the glomerual filtration rate and by increasing the tubular reabsorption of water. Also their ability of regulating their body temperature from 34.5-40.7 &deg;C conserves a lot of water, when most needed.

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