Respostas produtivas e comportamentais durante a ordenha de vacas Holandesas em início de lactação

Porcionato, Marco Aurélio de Felício; Negrão, João Alberto; Paiva, Fernando Fernandes; Delgado, Thiago Ferreira Gonçalves

doi:10.4025/actascianimsci.v31i4.6326

Cited by 5 publications

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References 10 publications

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“…High levels of humidity and temperature in the milking parlor can increase the panting of animals and influence the temperature of external parts of the body (PORCIONATO et al, 2009). However, during the experimental period the THI values remained below 72, characterizing the thermoneutral conditions for dairy cows (SILVA et al, 2009).The minimum temperature recorded in the upper area of the udder was 31.17°C and the maximum 35.83°C.…”

Section: Resultsmentioning

confidence: 99%

Udder Thermography of Gyr Cows for Subclinical Mastitis Detection

PORCIONATO

CANATA²,

OLIVEIRA³

et al. 2009

Revista Brasileira De Engenharia De Biossistemas

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Aiming to evaluate the infrared thermography technique for early detection of subclinical mastitis in Gyr cows, 70 animals were selected in 2 nd or 3 rd lactation, with an average production of 7.2 kg / d between 90 and 200 days in milking. Images of two quarters (front and backside) of the same udder side were monthly performed during three months using a thermal camera to evaluate the surface temperature at three different heights (upper, median and lower), totalizing 420 measurements. Milk samples from each quarter were also collected to evaluate the SCC and microbiological culture. The SCC did not influence udder temperature at different heights (p>0.05). However, temperatures among the regions of the quarter were different, the upper area had higher values than the median and lower regions (p<0.05). There was no difference in udder temperatures in relation to the type of microorganisms isolated in milk (p>0.05). The use of thermal camera allowed the identification of temperature variations of skin surface at different udder regions of Gyr cows. However, this technique was not effective in the detection of subclinical mastitis.Keywords: Gyr, Subclinical mastitis, Thermal camera, Dairy cows. 252 RESUMOCom o objetivo de avaliar a técnica de termografia infravermelho para detecção precoce de mastite subclínica em vacas da raça Gir, foram selecionadas 70 vacas de 2 a ou 3 a lactação, com produção média de 7,2 kg/dia, entre 90 e 200 dias de lactação. Imagens de dois quartos colaterais (anterior e posterior) do úbere, foram realizadas mensalmente, durante três meses utilizando uma câmera termográfica para avaliação da temperatura superficial em três alturas distintas (superior, medial e inferior), totalizando 420 avaliações. Também foram colhidas amostras de leite de cada quarto para avaliação da CCS e cultura microbiana. A CCS não influenciou a temperatura do úbere nas alturas estudadas (p>0,05). Porém, entre as regiões dos quartos houve diferença de temperatura, com valores mais altos na área superior (p<0,05) do que nas regiões medial e inferior. Não houve diferença de temperaturas no úbere em relação ao tipo de microrganismo isolado no leite (p>0,05). O uso da câmera termográfica permitiu identificar as variações de temperatura superficial da pele em diferentes regiões do úbere de vacas Gir. Porém, essa técnica não foi eficiente no diagnóstico da mastite subclínica.

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Section: Resultsmentioning

confidence: 99%

Udder Thermography of Gyr Cows for Subclinical Mastitis Detection

PORCIONATO

CANATA²,

OLIVEIRA³

et al. 2009

Revista Brasileira De Engenharia De Biossistemas

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“…This is reflected in the greater number of MRS 2 cows (defined by mild movements of one or both hind legs when fitting the teat cups), which may in turn reflect animals' habituation to stimuli present during milking, even after an average of three months of milking. Similarly, Porcionato et al (2009) observed a decrease in the number of dairy cows presenting 'undesirable' behaviors during milking after the fourth week of lactation, which, according to the authors, may have occurred due to animals' habituation to handling. In their 2015 article, Hedlund and Løvlie reported that dairy cows had higher consistency for stepping behavior during milking than for other behavioral measures, which highlights the importance of assessing the consistency of individual temperament measures over time.…”

Section: Discussionmentioning

confidence: 72%

The relationship between water buffalo cow temperament and milk yield and quality traits

et al. 2017

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The aims of this study were to assess the relationship between reactivity during milking and daily distances traveled by lactating water buffalo cows and to assess the association of these behavioral traits with milk yield and quality traits. Reactivity during milking was measured as a 4-point milking reactivity score (MRS, N=114 cows) where 1=stands quietly, 2=slight hind leg movements, 3=vigorous hind leg movements, and 4=continual vigorous hind leg movements or the stockperson ties the animal. Cows were classified according to their consistency for MRS within each month as 1) inconsistent (same MRS in fewer than 50% of observations), 2) moderately consistent (same MRS in 50-74.9% of observations), or 3) consistent (same MRS in at least 75% of observations). GPS collars were used to calculate the average daily distance traveled (DDT) by each cow (N=36). Milk yield and quality traits (fat, protein and lactose content, as well as somatic cell count) were measured once a month during the three months of the study. Results showed that DDT was not related to MRS (F=0.78, P=0.47). Furthermore, MRS was negatively associated with milk yield (F 2,66 =3.75; P=0.02), fat content (F 2,71 =3.34; P=0.04), and linear somatic cell score (LSCS) (F 2,69 =4.06; P=0.02). Reactive cows (MRS 3+4) had lower daily milk yield than MRS 1 cows, with lower fat content and higher LSCL than MRS 2 cows. On the other hand, DDT was not associated with milk yield or any quality traits (P > 0.05) other than LSCS (R 2 =0.60; P < 0.05). Since MRS and DDT were not correlated, we conclude that these traits reflect distinct aspects of water buffalo cows' temperament. Milk yield and quality were not related to DDT, indicating that only MRS was associated with the productive traits in lactating water buffalo cows.

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“…Esse resultado sugere que o estresse pontual causado por manejo em situações diversas como vacinação, casqueamento e mudança de instalações não causa queda na quantidade do leite ao longo da lactação, fato que está de acordo também com resultados verificados por Fulkerson & Jamieson (1982), Tancin et al (1995), Marnet e Negrão (2000), Rushen et al (2001), Negrão (2008) e Porcionato et al (2009).…”

Section: Resultsunclassified

Contagem de células somáticas e produção leiteira em cabras Saanen estressadas via aplicação de ACTH

et al. 2012

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RESUMO -Avaliou-se neste estudo o efeito do estresse, via administração de ACTH (hormônio adrenocorticotrófico), sobre a quantidade e qualidade do leite produzido e a indicação de estresse pela alteração no nível de cortisol. Assim, 12 cabras lactantes foram distribuídas em dois grupos: seis animais receberam aplicação de 0,06 UI de ACTH/kg de PV (desafiadas) e seis receberam solução placebo (controle), todas via intravenosa. O desafio ocorreu ao longo da lactação, com aplicação do protocolo aos 30, 60, 120 e 180 dias do início da lactação, avaliando-se em cada data os níveis de cortisol 30 minutos antes, no ato da aplicação, 60, 120 e 300 minutos depois. A produção leiteira foi mensurada diariamente durante 270 dias e, a cada 20 dias, o leite foi colhido para contagem de células somáticas (CCS) pelo método direto. Os teores de cortisol mensurados em -30 e 0 minuto antes da aplicação de ACTH foram baixos e semelhantes entre os grupos. Entretanto, a partir de 60 minutos, constatou-se efeito da aplicação de ACTH, com teor de cortisol de 61,37±6,65 versus 5,47±1,21 ng/mL e de 51,17±10,21 versus 4,67±1,21 ng/mL aos 120 minutos. Aos 300 minutos, o cortisol retornou ao nível basal. Não houve diferença na produção de leite, no teor de proteína e de gordura do leite, cujos valores nos grupos ACTH e Placebo foram 1,37±0,59 e 1,38±0,63 kg de leite, respectivamente. A contagem de células somáticas não foi influenciada pelo estresse e apresentou valores situados na faixa indicada para animais sadios. Constatou-se estresse pontual em decorrência da aplicação de ACTH, porém sem alterações de natureza quantitativa e qualitativa do leite produzido, e isso indica que atividades de manejo que estressam os animais pontualmente não trazem prejuízos ao sistema produtivo.Palavras-chave: apoptose, cortisol, leite, placebo Somatic cell count and milk production of Saanen goats stressed via application of ACTHABSTRACT -The objective of this study was to analyze the stress effect, via administration of ACTH (adrenocorticotropic hormone), on quantity and quality of milk produced and also the indication of stress by alteration of cortisol level. Twelve milking goats were divided in two groups: six animals were subjected to intravenous application of 0.06 UI of ACTH/kg of LW (challenged) and six received placebo solution (control). The challenge occurred during milking with protocol application at 30, 60, 120 and 180 days from the beginning of milking; each date the levels of cortisol were evaluated 30 minutes before, at the application of ACTH, 60, 120 and 300 minutes after ACTH. The milk production was measured daily during 270 days and every twenty days the milk was collected for somatic cell count (SCC) by the direct method. The cortisol levels measured at -30 and zero minutes before ACTH applications were low and similar between the goat groups. However, after 60 minutes it was verified the effect of ACTH application, and cortisol contents of 61.37±6.65 versus 5.47±1.21 ng/mL and of 51.17±10.21 versus 4.67±1.21 ng/mL at 120 minutes. At...

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Respostas produtivas e comportamentais durante a ordenha de vacas Holandesas em início de lactação

Cited by 5 publications

References 10 publications

Udder Thermography of Gyr Cows for Subclinical Mastitis Detection

Udder Thermography of Gyr Cows for Subclinical Mastitis Detection

The relationship between water buffalo cow temperament and milk yield and quality traits

Contagem de células somáticas e produção leiteira em cabras Saanen estressadas via aplicação de ACTH

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