Effet de l'injection de somatotropine bovine recombinée (rbST) sur les performances de brebis laitières. Influence de la nature de l'aliment concentré

Dell’Orto, V.; Chiofalo, V.; Savoini, G.; Zumbo, Alessandro; Sgoifo-Rossi, C.

doi:10.1051/animres:19960410

Cited by 7 publications

(2 citation statements)

References 6 publications

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“…Even in very late lactation, bST administration can modulate its activity and function (Baldi et al 2002). This is consistent with the findings of previous studies in dairy goats (Gallo et al 1997) and dairy sheep (Dell'Orto et al 1996; Chiofalo et al 1999). During early lactation, treatment with exogenous growth hormone had no effect on mammary cell proliferation in goats (Sejrsen et al 1999).…”

Section: The Neuroendocrine System During Lactation and Mammary Glandsupporting

confidence: 93%

The mammary gland in small ruminants: major morphological and functional events underlying milk production – a review

Lérias

Hernández-Castellano

Suárez-Trujillo

et al. 2014

Journal of Dairy Research

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The importance of small ruminants to the dairy industry has increased in recent years, especially in developing countries, where it has a high economic and social impact. Interestingly and despite the fact that the mammary gland is the specialised milk production organ, very few authors studied the modifications occurring in the mammary gland through the lactation period in production animals, particularly in the small ruminants, sheep (Ovis aries) and goat (Capra hircus). Nevertheless, understanding the different mammary gland patterns throughout lactation is essential to improve dairy production. In addition, associating these patterns with different milking frequencies, lactation number or different diets is also of high importance, directly affecting the dairy industry. The mammary gland is commonly composed of parenchyma and stroma, which includes the ductal system, with individual proportions of each changing during the different periods and yields in a lactation cycle. Indeed, during late gestation, as well as during early to mid-lactation, mammary gland expansion occurs, with an increase in the number of epithelial cells and lumen area, which leads to increment of the parenchyma tissue, as well as a reduction of stroma, corresponding macroscopically to the increase in mammary gland volume. Throughout late lactation, the mammary gland volume decreases owing to the regression of the secretory structure. In general, common mammary gland patterns have been shown for both goats and sheep throughout the several lactation stages, although the number of studies is limited. The main objective of this manuscript is to review the colostrogenesis and lactogenesis processes as well as to highlight the mammary gland morphological patterns underlying milk production during the lactation cycle for small ruminants, and to describe potential differences between goats and sheep, hence contributing to a better description of mammary gland development during lactation for these two poorly studied species.

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Section: The Neuroendocrine System During Lactation and Mammary Glandsupporting

confidence: 93%

The mammary gland in small ruminants: major morphological and functional events underlying milk production – a review

Lérias

Hernández-Castellano

Suárez-Trujillo

et al. 2014

Journal of Dairy Research

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“…Entretanto, o menor índice de porcentagem de proteína do leite em búfalas tratadas com bST foi também narrada por Sgoifo Rossi et al (1993) e Rosi et al (1997). Este fato foi previamente relatado por Dell'Orto et al (1996), ao observarem que a redução na porcentagem de proteína do leite de vacas leiteiras tratadas com bST deu-se simultaneamente ao pico de produção leiteira induzida pela administração de bST. Segundo Burton et al (1994), esta depressão relaciona-se ao balanço negativo temporário de nitrogênio, que pode ocorrer no início do tratamento com bST.…”

Section: R Brasunclassified

Efeito da utilização da somatotropina bovina recombinante (bST) sobre a produção de leite em búfalas

2002

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RESUMO -O objetivo deste trabalho foi estudar o resultado da utilização da somatotropina bovina recombinante (bST) atuando na produção de leite em búfalas da raça Murrah. Empregaram-se 28 búfalas multíparas da raça Murrah, divididas em dois grupos homogêneos de 14 animais, recebendo os seguintes tratamentos: Grupo 1 -Controle (solução salina) e Grupo 2 -500 mg de bST/cabeça a cada 14 dias, durante 7 meses. Búfalas tratadas com bST exibiram incrementos de 48,52%, 32,80% e 32,80% nas produções total de leite, corrigida, depois, para 4% de gordura e média diária, respectivamente. A somatotropina elevou a produção total de gordura sem alterar a porcentagem dela no leite. A administração de bST não afetou a porcentagem de proteína do leite todavia, a produção total de proteína foi aumentada. Quanto à duração da lactação, o tratamento com bST diferiu do controle, o que demonstra a maior persistência da lactação de búfalas tratadas com bST.Palavras-chave: búfalas, período de lactação, produção de gordura, produção de proteína Effect of Recombinant Bovine Somatotropin (bST) Utilization on Milk Production from BuffaloesABSTRACT -The objective of this work was to study the effect of recombinant bovine somatotropin (bST) utilization on milk production from Murrah buffaloes. Twenty eight multiparous Murrah buffaloes were used and divided into two homogeneous groups of 14 animals, receiving the following treatments: Group 1 -Control (salt solution) and Group 2 -500 mg of bST/head every 14 days during 7 months. Buffaloes treated with bST presented increase of 48.52%, 32.80% and 32.80% on total milk yield, adjusted to 4% of fat and average daily milk yield, respectively. Somatotropin increased total fat milk yield without alter fat percentage of milk. Administration of bST did not affect protein percentage of milk while total protein milk yield increased. As for the lactating period, the treatment with bST differed of the control, what might have denoted in larger persistence of the lactation from buffaloes treated with bST. Zootec., v.31, n.3, p.1230-1234, 2002 IntroduçãoA produção de leite em búfalas retrata uma atividade de imensurável importância em muitos países do mundo, a saber: Índia, Paquistão, Bulgária, etc. No Brasil, não obstante, ser recente sua introdução, e com o rebanho em formação, o búfalo tem despertado o interesse crescente dos criadores e dos órgãos de pesquisa, no sentido de oferecer nova alternativa para a pecuária leiteira.Dada às características físico-químicas particulares do leite de búfala, como por exemplo, teores de matéria seca, gordura e caseína, 41,1; 88,5 e 47,7% superiores, respectivamente, ao do leite bovino, oscilando em função do nível nutricional. A industrialização dele produz produtos diferenciados (como a mozzarella italiana, provolone e ricota, entre inúme-ros outros) ao receberem remuneração superior aos produtos oriundos do leite bovino.Sabendo-se que a búfala exibe uma produtividade limitada, o aumento da quantidade de leite, produzido sem alteração da qualidade e da composição d...

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Effect of bovine somatotropin on milk production, milk quality and the cheese-making properties of Grana Padano cheese

Masoero

Moschini

Rossi

et al. 1998

Livestock Production Science

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Effet de l'injection de somatotropine bovine recombinée (rbST) sur les performances de brebis laitières. Influence de la nature de l'aliment concentré

Cited by 7 publications

References 6 publications

The mammary gland in small ruminants: major morphological and functional events underlying milk production – a review

The mammary gland in small ruminants: major morphological and functional events underlying milk production – a review

Efeito da utilização da somatotropina bovina recombinante (bST) sobre a produção de leite em búfalas

Effect of bovine somatotropin on milk production, milk quality and the cheese-making properties of Grana Padano cheese

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