Abstract
The aim of study was to evaluate the diagnosis of estrous in Canindé goats used infrared thermographic images. The Canindé goats used in experiment, belong to Production Center of Small Ruminants. The goats were subjected to estrus induction and monitored with regard to their behavior and blood levels of hormones. Temperature measurements were continuous during estrous signs and even disappearance of behavioral characteristics. Were evaluated different areas in females: vulva, perivulvar, dorse and venter regions, delimited by a quadrant that allowed the specification of assessed region. In addition to specific behavior of estrus in ruminants were observed in vulvar region perivulvar signals swelling and redness and parallel identified the temperature rise of region by thermographic images. Were observed in vulvar region perivulvar signals swelling and redness and parallel identified the temperature rise of that region by thermographic images in goats in estrus. There was a significant effect for all temperatures of the regions evaluated for the thermographic images and infrared thermometer, except for the temperature of the vulvar region. The temperatures measured using the thermographic camera submitted a difference in the data set, allowing measurements observed higher temperatures compared with the temperatures measured with an infrared thermometer. So, due the precision and speed of the method the thermographic images used for detecting estrus is applicable and important. In animal production, thermography has seen used in detection of metabolic disorders, diseases and infections. In addiction, is used in understanding thermoregulation due to chenges in temperature and the impact of environmental conditions.
Highlights
An experimental level, the infrared thermography through visible colors, it has assumed an important role as a safe method, non-invasive and used in analysis of different areas of animal production, especially in the identification of thermal comfort in real time (SYKES et al, 2012)
The use of thermographic images have long been used in production systems as a technological tool in the diagnosis of diseases (MCMANUS et al, 2016), as in studies of parasitic tick infestation in cattle (CORTIVO et al, 2016), in bioclimatology (CARDOSO et al, 2016; GEORGE, 2014 ) on animal welfare (STEWART et al, 2005) and animal reproduction (SCOLARI et al, 2009; RAMIRES NETO et al, 2011; SIMÕES et al, 2014; CRUZ JÚNIOR et al, 2015; ALVES et al, 2016)
The identification of estrous in goats showed that the infrared thermography can be a promising technique, and to a highly repeatable method for evaluation of skin temperature in goats
Summary
When associated with increased herd size and the need for improvements work, has increased dependency on estrus detection tools, with emphasis non-invasive diagnostic methods. In the livestock industry has been used for applications in the diagnosis of lesion members, evaluating the scrotal temperature as measure of fertility in cattle and goats (WESCHENFELDER et al, 2013) and evaluation of heat stress in dairy cattle (MONTANHOLI et al, 2008) It has been revealed as auxiliary and efficient technique for estrous detection in dairy ruminants (TALUKDER et al, 2014), especially in identifying the increase in the vulva area of the surface temperature difference between the phases of estrous and diestrus (SIREGAR et al, 2016). This fact is a consequence of changes in body temperature during the estrous cycle, due to increased blood flow, which increases with the approach of ovulation (OLA et al, 2006)
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