Caracterización del ambiente térmico para la actividad ganadera bovina en el Valle del Cauca, Colombia

Aguilar, Fernando Silva; Duque, Sandra Milena Perilla; Guerrero, Hugo Sánchez

doi:10.15446/acag.v65n4.49018

Cited by 6 publications

(7 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…These results reinforce the correlations found in individual farms. This could be attributed to similarities among climatic conditions within the study area (Molina et al 2016;Jara et al 2016).…”

Section: Resultsmentioning

confidence: 89%

Influence of climatic conditions on tympanic temperature and milk production in grazing cows

Vélez-Terranova

Molina

Sánchez

et al. 2021

JABB

View full text Add to dashboard Cite

Vasconcelos et al 2020). Animal's body temperature is traditionally estimated through rectal and vaginal measurements; however, alternative methods like tympanic temperatures (TT) also constitute a reliable measure since some studies reported no statistical difference with rectal temperatures (Sellier et al 2014;Shu et al 2021) and high correlation with vaginal temperature (r = 0.77; Bergen and Kennedy, 2000). The differences associated with the anatomical sampling point and its response time were also validated in other studies (Scharf et al 2011;Sellier et al 2014;Godyń et al 2019). TT is an attractive alternative measure Abstract The present study aimed to analyze large volumes of tympanic temperature (TT) data to identify its use as a physiological indicator of climatic conditions and its relationship with milk production in grazing cows under tropical lowland conditions. Three dairy farms and 21 multiparous early lactation cows were included in the study. Seven animals were equipped with tympanic temperature wireless sensors within each farm, and permanent information was collected hourly for 22 days on average. Ambient temperature (AT), relative humidity (RH), wind speed (WS), precipitation (PP), and THI information were obtained from meteorological stations located close to each farm. Statistical analyses included Spearman correlations and random coefficient regression models (P < 0.05). TT presented moderate and significant correlations with AT (0.35 to 0.49), SR (0.25 to 0.32), THI (0.35 to 0.49), and RH (-0.35 to -0.49). Climatic variables like AT, PP, SR, and WS were the most contributing factors to TT prediction (R 2 =0.42 to 0.86). Grazing dairy cows in tropical scenarios accumulate heat during the day and dissipate it at nighttime, although higher producing animals deal with more problems to reach thermal homeostasis. Correlations between TT and daily milk production varied according to animal yield; however, higher TT values were related to the most productive cows. The effect of TT on milk production prediction was not conclusive among farms, possibly by animal management or others characteristics of the systems. TT determination through remote sensors allows a reliable diagnosis of the physiological temperature response to climatic conditions.

show abstract

Section: Resultsmentioning

confidence: 89%

Influence of climatic conditions on tympanic temperature and milk production in grazing cows

Vélez-Terranova

Molina

Sánchez

et al. 2021

JABB

View full text Add to dashboard Cite

show abstract

“…Therefore, to had achieved this homeostasis, the amount of heat gained with metabolic processes and solar radiation, must be equal to the amount of heat lost throughout the most efficient energy exchange routes as follows: 1) sensible heat: conduction, convection and radiation, and 2) latent heat: panting and sweating (Collier & Gebremedhin, 2014). The environmental temperature, solar radiation, relative humidity and wind speed influence positively or negatively on these routes (Molina, Silva, Perílla & Sánchez, 2016).…”

Section: Discussionmentioning

confidence: 99%

“…Animals like cattle (endotherms), have the ability to control their homoeothermic regulation within a range. In environments where temperature variations could be extended, they could face adverse climate scenarios (Molina, Silva, Perílla & Sánchez, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Some literature citations on the influence of physiological mechanism that regulates the animal strain to thermal stress (Barragan, Mahecha & Cajas, 2015;Barrera, Angeli, Machado, Cardoso & Gonzalez, 2015;Belhadj, Najar, Ghram & Abdrrabba, 2015;Collier,Zimbelman, Rhoads, Rhoads & Baumgard, 2011;Dunshea et al, 2013;Molina, Silva, Perílla & Sánchez, 2016;Pejman & Shahryar, 2012). …”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A conceptual model to describe heat stress in dairy cows from actual to questionable loops

Guerrero

Atzori

2018

Acta Agron.

View full text Add to dashboard Cite

A conceptual model to describe heat stress in dairy cows from actual to questionable loops Modelo conceptual para describir el estrés calórico en vacas lecheras a partir de bucles reales a cuestionables AbstractThermal environment is recognized to be one the most important ecological factor to determine domestic animal growth, development and productivity for direct and indirect effects on its physiology and behavior. Despite having specific and individual adaptation, is very common, within seasonal or diurnal temperature variations, animals deal with situations outside their thermal comfort zone. Due to heat stress, dairy cows reduce milk production and fertility, and therefore, had achieved an increasing in metabolic disorders incidence, causing low revenues to farm in short and medium periods. Due to world climate change more impact of the meteorological variables on animal responses is expected for the future. This study aimed to describe and understand the interactions of variables associated with heat stress in dairy cattle. System thinking approach to this specific physiological mechanism might help to better focus managerial aspects related to grazing conditions and animal needs. A causal loop diagram annotation used to connect biological variables included in system boundaries. Causal connections were validated with literature citations on the heat stress influence. The most important feedback loops highlighted underline dominant structure and expected patterns. Four balancing loops involved in physiological mechanisms used by animals in order to reduce metabolic heat production and to regulate homeostasis of the internal temperature, were found. Keywords:Climate change, grazing, livestock production systems, milk production, system dynamics, temperature. ResumenSe reconoce que el ambiente térmico es uno de los factores ecológicos más importantes para determinar el crecimiento, el desarrollo y la productividad de animales domésticos con efectos directos e indirectos sobre su fisiología y comportamiento. A pesar de tener una adaptación específica e individual, es muy común que, dentro de las variaciones de temperatura estacionales o diurnas, los animales se enfrenten a situaciones fuera de su zona de confort térmico. Debido al estrés calórico, las vacas lecheras reducen su producción y fertilidad, y por lo tanto, llevan a cabo un aumento en la incidencia de trastornos metabólicos, causando bajos ingresos para la finca a corto y mediano plazo. Debido al cambio climático mundial, se espera un mayor impacto de las variables meteorológicas en las respuestas de los animales para el futuro. Este estudio tuvo como objetivo describir y comprender las interacciones de las variables asociadas con el estrés calórico en el ganado lechero. El enfoque dinámica de sistemas aplicado a este mecanismo fisiológico específico ayuda a entender el estrés calórico en vacas lecheras cuando se relacionan los aspectos de pastoreo y las necesidades del animal. Se usó una anotación de diagrama de bucle causal para conectar las var...

show abstract

“…Es sabido la importancia de las condiciones medioambientales para la termorregulación y confort animal (Soria y Corva, 2004;Espinoza et al, 2011;Tarazona, 2013;Benavides et al, 2016), aun así, en este estudio la temperatura ambiental y la humedad relativa no tuvieron diferencia significativa (p>0,05) respecto al pH del lomo a las 24 horas o a la presentación de eventos agresivos en el corral de espera presacrificio. Aunque la mayoría de los grupos fueron observados en días diferentes, todo el estudio se hizo en verano y las variaciones climáticas entre días no fueron estadísticamente significativas, por ello, la variación de temperatura y humedad no influyó ni el comportamiento agresivo ni en el pH a las 24 horas de los animales en este estudio.…”

Section: Variables Ambientalesunclassified

Comportamiento de machos cebú en corrales presacrificio y su relación con el pH de la carne

Córdoba¹,

Correa

Barahona

et al. 2017

ARCH ZOOTEC

View full text Add to dashboard Cite

La adaptación de un animal al medioambiente está influenciada por varios factores, entre ellos los métodos utilizados para la reproducción, producción y sacrificio. El objetivo de este estudio fue evaluar el comportamiento individual de machos cebú en corrales presacrificio y relacionarlo con el pH de la carne. Un total de 150 novillos de la raza Brahman, entre 24 y 27 meses de edad y un peso promedio de 447,4±35,4 kg, fueron estudiados en su etapa previa al sacrificio, evaluando los comportamientos agonistas de cada individuo durante seis horas posteriores al desembarque en la Central Ganadera de Medellín. El método utilizado para medir el comportamiento fue un registro continuo en el momento de ocurrencia de alguno de los comportamientos agonistas. Fueron estimadas las relaciones entre el tiempo de transporte (TT), el tiempo de ayuno (TA), el peso vivo (PV), la temperatura ambiental, humedad relativa, y la temperatura superficial (ventral (TV) y dorsal (TD)), con el pH de la carne a las 24 horas post mortem y los comportamientos agonistas de los animales. Se concluye que un TT superior a 20 horas desde la finca hasta la planta de sacrificio, y un TA mayor a 38 horas, implican un aumento en la actividad y la agresividad de los animales durante su espera en corrales. La TV y TD al momento de llegada al corral, influencian el descenso apropiado del pH de la carne. Los cambios en temperaturas superficiales a diferentes momentos, pueden aumentar el comportamiento agresivo, y además, PV superiores a 447 kg al momento del sacrificio, pueden afectar el descenso adecuado del pH.

show abstract

Caracterización del ambiente térmico para la actividad ganadera bovina en el Valle del Cauca, Colombia

Cited by 6 publications

References 11 publications

Influence of climatic conditions on tympanic temperature and milk production in grazing cows

Influence of climatic conditions on tympanic temperature and milk production in grazing cows

A conceptual model to describe heat stress in dairy cows from actual to questionable loops

Comportamiento de machos cebú en corrales presacrificio y su relación con el pH de la carne

Contact Info

Product

Resources

About