Thermoregulation differs in Chinampo (Bos taurus) and locally born dairy cattle

Espinoza, José; Gracia, J.; Sanchez, Jesus Rodriguez; Ortega, Ricardo; Palacios, Alejandro

doi:10.3906/vet-0704-24

Cited by 5 publications

(1 citation statement)

References 14 publications

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“…Multiparous cows were also found to be more susceptible to thermal stress. However, small and young animals were less affected than large and old animals, likely because they are better able to dissipate heat and experience thermal stress less rapidly (Espinoza et al, 2009;Verkerk, 2009;Sunil et al, 2011;Pragna et al, 2017).…”

Section: >82mentioning

confidence: 99%

Review on performance responses of dairy cattle against thermal stress

Mohammed

2023

Ethiop. Vet. J.

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This manuscript is aimed at reviewing the performance responses of dairy cattle against thermal stress resulting from climate change. Climate change is the major factor that largely affects the dairy industry. Thermal stress (TS) is the perceived discomfort and physiological strains associated with exposure to excessive ambient temperature. Temperature and Humidity Index (THI) have been adopted to describe thermal conditions that drive thermal stress in dairy cattle. The effects of TS are devastating in the dairy industry if not managed well. The thermo-neutral zone for dairy cattle and calves in the tropics is THI <72. Milk yield reductions of up to 50% have been reported for Holstein cows due to thermal stress under summer climate conditions. Moreover, thermal stress is associated with alterations in milk composition. TS reduces the length and intensity of estrus manifestation. Moreover, 80% of estrus may be unnoticeable during the summer season in temperate regions, which further reduces fertility. Conception rates of dairy cows may drop up to 20–27% in the summer season. Climate-induced thermal stress resulted in a decrease of 3.5 kg and 25 kg in the birth weight and weaning weight of Fogera calves, respectively. Dry matter feed intake was reduced by 9.6%. Commonly used thermal stress reduction strategies included modification of the physical environment, breeding for heat-tolerant dairy cattle, and nutritional management. The productive and reproductive traits are susceptible to the negative impacts of thermal stress with an increase in THI above 68.0 for Holstein Frisian cattle and their crosses and 72 for tropical cattle under an open shed system. Mitigations of thermal stress by breeding heat-tolerant animals, using a loose house system, and season-based feeding should be considered an integral component of the dairy cattle management system.

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Section: >82mentioning

confidence: 99%

Review on performance responses of dairy cattle against thermal stress

Mohammed

2023

Ethiop. Vet. J.

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Nutritional value and coagulation properties of milk from local cow breeds, including the selected macro- and micronutrients and trace elements

et al. 2020

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The aim of the study was to assess the nutritional value of milk based on its chemical composition and content of selected minerals and to determine the coagulation properties of raw milk from native Polish breeds, i.e. the Polish Red and the White-backed, as well as locally raised Simmental cows, taking into account the production season. The research material consisted of 418 milk samples taken during the spring/summer season (April to September) and autumn/winter season (October to March). The following parameters were determined in the samples: chemical composition, energetic value, coagu¬lation properties (RCT - rennet clotting time, A30 - curd firmness, K20 - curd firming time), cheese yield, and content of K, Na, Ca, Mg, Zn, Fe, Mn, Cu, Ni and Co. The percentage of the daily allowance for Ca and Mg in children, adolescents and adults from 250 mL of milk was determined. The milk of Polish Red cows had the highest concentration of basic nutrients (1 kg of milk provided 823.98 kcal) and the best coagulation parameters (the shortest clotting time (16:09 min, p≤0.01) and firmest curd (30.74 mm). This milk had a more beneficial nutritional profile, as it contained the highest percentage of the recommended daily allowances of Ca and Mg among all groups. The raw milk obtained in the pasture season showed more favourable coagulation properties. The content of minerals in milk is not clearly determined by the cow breed or the season. It is probably due to the higher levels of these nutrients in the feed, which in turn results from their content in the soil and the degree of fertilization.

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Tolerancia al calor y humedad atmosférica de diferentes grupos raciales de ganado bovino

Espinoza¹,

P²,

E³

et al. 2011

Rev MVZ Córdoba

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Objetivo. Comparar algunas respuestas fisiológicas al calor y humedad atmosférica entre bovinos Chinampos (Bos taurus; Ch), ½ Charolais ½ Brahman (CB), Holstein (H) y Jersey (J). Materiales y métodos. Se realizó un estudio en La Paz, México. Se utilizaron 12 vacas H, 10 J, 15 Ch y 8 CB. Durante el verano se midieron cada semana (a las 0600 y 1600 horas) la frecuencia respiratoria (FR) y temperatura rectal (TR). Se registraron las variables climáticas para calcular el índice de temperatura-humedad (ITH). Resultados. Durante todo el verano, la FR en los cuatro grupos estuvo por encima de los valores fisiológicos para el ganado bovino, siendo superior en H y J que en Ch y CB (p

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Thermoregulation differs in Chinampo (Bos taurus) and locally born dairy cattle

Cited by 5 publications

References 14 publications

Review on performance responses of dairy cattle against thermal stress

Review on performance responses of dairy cattle against thermal stress

Nutritional value and coagulation properties of milk from local cow breeds, including the selected macro- and micronutrients and trace elements

Tolerancia al calor y humedad atmosférica de diferentes grupos raciales de ganado bovino

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