Infrared technology for estrus detection and as a predictor of time of ovulation in dairy cows in a pasture-based system

Use of infrared thermography to evaluate the influence of the of Climatic Factors in the Reproduction and Lactation of Dairy Cattle

“…Os resultados do presente experimento são similares aos descritos para a temperatura da superfície da glândula mamária de vacas saudáveis, mostrando a influência dos fatores climáticos temperatura ambiente e umidade relativa do ar na temperatura da pele da glândula mamária [7,13,27].…”

“…As médias das temperaturas da vulva variaram entre 33ºC no mês de maio, até 38,3ºC no mês de abril, semelhante à faixa de temperatura com média de 35,0 ± 2,4ºC [27]; Hoffmann et al [11] obtendo média de 37,2°C e de 36,90 ± 0,50°C [24]. A despeito das diferenças das origens genéticas, da geografia e do clima, verifica-se padrão similar para as faixas de temperatura da vulva em vacas de leite.…”

“…Em vacas, estudos relataram as temperaturas da vulva [8,27,28], glândula mamária [7,13,14,18], tetos [23], abdômen [3,5,7,8,17] e tórax [3,5,6,8]. Necessita-se padronizar as variações fisiológicas de temperaturas das áreas do corpo dos animais de produção [13,17,18,24].…”

Plasma oxidative stress biomarkers and progesterone profiles in a dairy cow diagnosed with an ovarian follicular cyst

“…The structure was accompanied by the display of anoestrus according to the criteria detailed by Leslie and Bosu (1983). Cow 1285 was one of 20 cows enrolled in a study that was conducted to evaluate the potential of infrared thermography temperature monitoring for oestrus detection and prediction of time of ovulation in dairy cows; for more details and findings of the study, the reader is referred to Talukder, Kerrisk, Ingenhoff, Thomson et al (2014) for details about the nutritional and reproductive management of the cows. Of the 20 cows enrolled in this study, 12 ovulated, 7 did not ovulate, and 1 cow developed cystic ovarian disease.…”

“…After eight days, CIDR's were removed and 2 ml (500 mg) of synthetic prostaglandin analogue (PGF 2a ), cloprostenol sodium (Estrumate Ò , Schering-Plough Animal Health Limited, Baulkham Hills, NSW, Australia) were injected intramuscularly to all cows at 6:00 h. Cows were monitored from 36 h after PGF 2a injection six times daily until either ovulation or 128 h after PGF 2a injection for oestrus signs as described in Talukder, Kerrisk, Ingenhoff, Thomson et al (2014).…”