Qualidade e quantidade do leite produzido por cabras da raça Saanen submetidas a estresse por três dias consecutivos

Effect of stress on somatic cell count and milk yield and composition in goats

“…Romero et al (2015) did not find that acute stress for 5 minutes increased the SCC, but these authors only used primiparous IMI-free goats, which would coincide with what we observed in the present work. Other authors did not find that the stress induced by 45 minutes of transportation or by application of ACTH (Gaiato et al, 2012) affected SCC, but in both studies the distribution of goats according to parity number was not described and, therefore, we cannot know if it differs with our results. In ewes aged from to 6 years subjected to stress (isolation test for 10 minutes), Caroprese et al (2010) observed that SCC was higher in high-cortisol ewes than in low-cortisol ewes, but the differences were small (geometric means of 0.426 and 0.223 million cells/ml, respectively).…”

“…The fact that stress in the parity 1+2 goats did not affect the milk yield and composition agree with Romero et al (2015) who found the same result when IMI-free primiparous goats suffered an acute stress for 5 minutes. Gaiato et al (2012) found no alteration of quantitative and composition of milk produced in goats punctually stressed via application of ACTH, but in this study the distribution of goats according to parity number was not described. In ewes, Caroprese et al (2010) also found that a short-term acute stress had no effect on the secretion of milk components.…”

“…In this specie, some authors suggest that certain apparently stressful situations such as ruminal acidosis, vaccination against enterotoxemia (Lerondelle et al, 1992) and milking (Karzis et al, 2004;Salama et al, 2003) increase the SCC. However, other authors found that the stress induced by 45 minutes of transportation or by application of ACTH (Gaiato et al, 2012) did not affect SCC.…”

Desenvolvimento De Software Para Dimensionamento De Silos Multicelulares De Concreto Armado

“…Esses resultados são semelhantes aos obtidos no presente estudo. Porém, alguns autores citam o aumento do teor da gordura ao longo da lactação, provavelmente em decorrência de uma diminuição na quantidade de leite produzido (Barbosa et al, 2002) e outros não verificaram alteração no teor de gordura ao longo da lactação (Gaiato, 2012).…”

Efeito de diferentes estressores na produção de leite de cabras Saanen e suas relações com estresse oxidativo na glândula mamária

“…Outros autores destacaram que as alterações hormonais relacionadas ao estresse, fornecem a energia necessária para dar suportar as respostas fisiológicas que possibilitam o retorno a homeostasia dentro de algumas horas CANAES;NEGRÃO, 2009;GAIATO;DELGADO;NEGRÃO, 2012). De fato, recentemente nosso grupo demonstrou que o estresse cumulativo causou alterações significativas na temperatura retal, nas frequências cardíaca e respiratória, liberação de insulina, T3, IGF1 e na concentração de glicose plasmática (VASCONCELOS et al, 2020).…”