Effect of Thermal Stress on Thermoregulation, Hematological and Hormonal Characteristics of Caracu Beef Cattle

Abduch, Natalya G.; Pires, Bianca Vilela; Souza, Luana Lelis; Vicentini, Rogério Ribeiro; Zadra, Lenira El Faro; Fragomeni, B. O.; Silva, Rafael M. O.; Baldi, Fernando; Paz, Cláudia Cristina Paro de; Stafuzza, Nedenia Bonvino

doi:10.3390/ani12243473

Cited by 11 publications

(3 citation statements)

References 66 publications

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“…According to [16,43], RBC and Ht decrease with heat stress; therefore, there was no such effect in the evaluated breed groups. Except for SE, which presented mean results lower than the others, however, this cannot be considered only as a temperature effect.…”

Section: Discussionmentioning

confidence: 85%

Hematological Normality, Serum Biochemistry, and Acute Phase Proteins in Healthy Beef Calves in the Brazilian Savannah

Motta,

Neto,

Nociti

et al. 2023

Animals

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The Brazilian savannah region, characterized by high average temperatures, well-defined rainy and dry seasons, soil with low productive potential, and high pressure for parasitic diseases, is home to the highest percentage of the beef herd, which is the world’s largest commercial beef producer. Therefore, breeds that present rusticity combined with productivity are the focus of research in cattle breeding in the region. Considering their geographic particularities and their effects on the animals’ blood parameters, the objective was to study the behavior of hematological variables, serum biochemistry, and acute phase proteins in beef calves at weaning age. Jugular blood samples were collected in a single day from 30 weaning calves (about eight months old and 200 kg of body weight) from the following breeds: Nellore, Senepol, Nellore × Aberdeen Angus cross, Nellore × Senepol cross, and Nellore × Aberdeen Angus × Senepol cross. Hematological data were obtained using an automatic cell counter, serum biochemical measurements were obtained using commercial kits, and the electrophoretogram was obtained using the SDS-page technique. In general, the results were consistent with data already published in similar situations regarding health status, age, and level of metabolic activity. However, differences observed between groups can be explained by differences observed in other concurrent variables like temperament. The pure zebu breed was more reactive than pure taurine. While crossbreds showed intermediate values, and parasitic infestation, the pure taurine breed with higher parasite infestation, while the zebu breed had lower values, which produced effects in some laboratory tests, and generated differences between breeds. In conclusion, the reference intervals available for healthy animals can be routinely used without interference from the geographic region for animals produced without nutritional failures as long as changes are recorded in pathological, infectious, metabolic, or nutritional deficiency situations. However, it is suggested that a study covering a larger number of herds may demonstrate a greater geographic effect on the studied variables.

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Section: Discussionmentioning

confidence: 85%

Hematological Normality, Serum Biochemistry, and Acute Phase Proteins in Healthy Beef Calves in the Brazilian Savannah

Motta,

Neto,

Nociti

et al. 2023

Animals

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“…The decrease in the erythrocytic count in polled Bali cattle indicates that sun exposure and exercise during the day can interfere with erythrocytes, as explained by Tamzil et al (2014) that heat stress can affect the erythropoietin hormone in the spinal cord so that the production and development of erythrocytes are inhibited. Abduch et al (2022) reported that daytime sun exposure and exercise had a negative impact on the number of erythrocytes in Caracu beef cattle. Ondruska et al (2011) also reported that rabbits exposed to 36°C daily, for 12 h, within 4 weeks were able to reduce the erythrocytic count.…”

Section: Advances In Animal and Veterinary Sciencesmentioning

confidence: 99%

Effect of Heat Stress on the Physiological and Hematological Profiles of Horned and Polled Bali Cattle

Sukandi¹,

Rahardja²,

Sonjaya³

et al. 2023

AAVS

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Bali cattle are local cattle owned by Indonesia that play a role in meeting the lack of meat demand in the country. In its development, both horned and hornless Bali cattle were found. This study aims to determine the influence of heat stress on the physiological and hematological profiles of horned and polled Bali cattle. Eight male Bali cattle (four horned and four polled) with an age range of 2.5-4.5 years were used. Parameters observed were the body's physiological response (rectal temperature, skin surface temperature, respiration rate, and pulse rate) and hematological profile (erythrocytes, hemoglobin, hematocrit, and leukocytes). Body physiological and hematological data were analyzed using factorial analysis to compare Bali cattle (horned and polled) and the time factor of measurement (morning and afternoon), followed by Duncan's test. The results showed that horned and polled Bali cattle were significantly (P<0.05) different in rectal temperature, erythrocytic counts, hemoglobin levels, and hematocrit values but not in skin surface temperature, respiration rate, pulse rate, and leukocyte counts. The time factor of measurement (morning and afternoon) showed significant (P<0.05) differences in rectal temperature, skin surface temperature, respiration rate, pulse rate, erythrocyte counts, and hemoglobin levels, but not in hematocrit values and leukocytic counts. Compared to horned Bali cattle, polled Bali cattle showed higher increases in rectal temperature, skin surface temperature, and respiration rate caused by the absence of horns. A higher hematological profile supports higher metabolic processes.

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“…Animal thermoregulation is a set of mechanisms that seek to adjust the internal body temperature of animals, in an attempt to maintain it at values compatible with life, when there is fluctuation in the temperature of the environment [ 1 , 2 ]. The use of these mechanisms has a direct influence on the animal’s behavior, energy expenditure and performance [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

Effects of Climatic Conditions and Supplementation with Palm Cake on the Thermoregulation of Crossbred Buffaloes Raised in a Rotational Grazing System and with Natural Shade in Humid Tropical Regions

Brcko,

Silva,

Garcia

et al. 2023

Animals

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In ruminants, diet composition has a positive correlation with heat production, which can influence thermoregulation, energy expenditure and, consequently, animal performance. The objective of this work was to evaluate the effects of climatic conditions and supplementation based on palm kernel cake, on the thermoregulation of crossbred buffaloes in the eastern Amazon. The research was carried out at Embrapa Amazônia Oriental (01°26′ S and 48°24′ W), Belém, Pará, and lasted 12 months (representing the entire year). Twenty-four buffaloes, females, with initial age and an average weight of 54 ± 7 months and 503.1 ± 23 kg, respectively, non-pregnant, non-lactating and clinically healthy were used, divided into four treatments based on the supplementation content of the palm cake (%DM) in relation to their body weight (%): 0, 0.25, 0.50 and 1.0. The animals were kept in paddocks with Brachiaria brizantha (cv. Marandu), in a rotating system, with water to drink and mineral salt ad libitum. Equipment was installed to record environmental data (temperature and relative humidity, dew point temperature, wet bulb and black globe) and physiological data: rectal temperature (RT); respiratory rate (RR); and body surface temperature (BST), recorded twice a day, always in the morning (6:00 a.m. to 7:00 a.m.) and afternoon (12:00 p.m. to 1:00 p.m.) shifts, and were used to calculate the Globe Temperature and Humidity Index (GTHI). Supplementation did not influence the physiological variables of thermoregulation (p > 0.05). However, there were differences in the GTHI between the shifts, with higher means in the afternoon shift, especially in the less rainy period of the year, where the GTHI reached 92.06 ± 2.74 (p < 0.05). In all periods of the year, the mean values of RT, RR and BST were higher in the afternoon shift (p > 0.05). The respiratory rate (RR) is associated with the annual seasonality of the thermal waters, with higher averages in the afternoons of the rainy season. The positive correlation for rectal temperature, respiratory rate and body surface temperature indicated that buffaloes respond to thermal elevations in the atmosphere (afternoon period) and, consequently, reflect on the GTHI. Supplementation does not influence thermoregulation; the changes observed occurred in response to the region’s thermal and rainfall conditions (mainly in the afternoon shift), with higher GTHI values.

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Effect of Thermal Stress on Thermoregulation, Hematological and Hormonal Characteristics of Caracu Beef Cattle

Cited by 11 publications

References 66 publications

Hematological Normality, Serum Biochemistry, and Acute Phase Proteins in Healthy Beef Calves in the Brazilian Savannah

Hematological Normality, Serum Biochemistry, and Acute Phase Proteins in Healthy Beef Calves in the Brazilian Savannah

Effect of Heat Stress on the Physiological and Hematological Profiles of Horned and Polled Bali Cattle

Effects of Climatic Conditions and Supplementation with Palm Cake on the Thermoregulation of Crossbred Buffaloes Raised in a Rotational Grazing System and with Natural Shade in Humid Tropical Regions

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