Respostas reprodutivas e metabólicas de ovelhas alimentadas com bagaço de caju desidratado, durante o pós-parto

Abstract

Respostas reprodutivas e metabólicas de ovelhas alimentadas com bagaço de caju desidratado, durante o pós-parto RESUMOAvaliou-se o efeito da adição de bagaço de caju desidratado (BCD), durante o pós-parto, em 41 ovelhas, alojadas com suas crias em baias, onde recebiam, à vontade, 75% de capim-elefante + 25% de concentrado (DI; n=17), ou 50% de BCD + 25% de capim-elefante + 25% de concentrado (DII; n=24). Cinquenta dias pós-parto, o estro foi sincronizado, e as ovelhas submetidas à monta natural. O grupo DI perdeu mais peso (P<0,05), e o consumo de proteína bruta e de fibra em detergente neutro foi maior nesse grupo (P<0,001). A inclusão de BCD na dieta II induziu ao aumento do consumo de matéria seca, extrato etéreo e fibra em detergente ácido (P<0,001) e redução significativa das concentrações de colesterol, lipídios totais, albumina e proteína total (P<0,001). Não houve diferença entre os grupos (P>0,05) no tempo de retorno do primeiro corpo lúteo funcional, na resposta à sincronização do estro e nas taxas de gestação e prolificidade. A inclusão de 50% de BCD amenizou as perdas de peso, foi bem consumida e não influenciou nas respostas reprodutivas após a sincronização do estro.Palavras-chave: ovelha, bagaço de caju, metabólitos, pós-parto ABSTRACT

Use of castor meal (Ricinus communis L.) as a source of dietary protein in goats during the mating period: impact on reproductive and metabolic responses

“…These findings demonstrate that the total substitution of soybean meal with detoxified or non-detoxified castor meal does not reduce the reproductive performance of goats. In previous studies by our group, we observed that the inclusion of 50% cashew bagasse in the diet of sheep during the post-partum period also did not influence the response to estrous synchronization (RODRIGUES et al, 2011). Thus, it is believed that the expression of estrous is directly related to the levels of the animal's body reserves (SILVA et al, 2011a), but not to the intake of alternative dietary sources.…”

“…These observations are in accordance with the findings of Kerbler et al (1997), who reported that the luteal secretion of P 4 is essential for the production of oocytes of good quality, as well as for embryonic survival in sheep. In addition, P 4 levels have been successfully utilized for the evaluation of ovarian function in goats (SILVA et al, 2011a) and sheep (RODRIGUES et al, 2011).…”

“…The fetal measurements in goats fed WCM (n = 18), DCM (n = 20) and CM (n = 20) were performed every five days. The following parameters were evaluated according to methods proposed by Santos et al (2004): vesicle diameter (VD), from the 25th to 45th day of pregnancy; crown-rump length (CRL), from the 30th to 50th day of pregnancy; and biparietal diameter (BPD) and abdominal diameter (AD), from the 40th to 60th day of pregnancy. Thoracic diameter (TD) was determined from the 45th to 60th day of pregnancy according to Lee et al (2005).…”

Reproductive responses and productive characteristics in ewes supplemented with detoxified castor meal for a long period

“…Recently, Rodrigues et al (2011) found that the substitution of 50% cashew bagasse for elephant grass did not have any effect on estrus synchronization rates and pregnancy in sheep. Saunders et al (2012) also found that diets containing sources of protein of different ruminal degradability did not alter pregnancy rates in sheep.…”

“…In addition, every 5 days after partum, until 60 days post-partum, blood samples were collected to determine the presence of corpora lutea in the ovaries, based on the progesterone concentration. A functional corpus luteus (CL) was confirmed when at least two consecutive samples showed progesterone levels of over 1 ng/mL; a non-functional CL was indicated by there being no detection of progesterone levels of over 1 ng/mL (Rodrigues et al, 2011).…”