Influência de um nutracêutico no sêmen, testosterona, cortisol, eritrograma e peso corpóreo em touros jovens Bos taurus indicus AbstractThe purpose of this study was to investigate the nutraceutic (Promater) influence on semen, body weight, eritrogram and hormones testosterone and cortisol in Nelore young bulls. Twenty Nelore bulls were utilized, aging between 30 and 36 months, divided in group 1 (G1)=10 (control) and group 2 (G2)=10 (nutraceutic group -Promater: 20 mL/animal/day, during 70 days). Corporal weight, blood samples to eritrogram, testosterone and cortisol were obtained in days zero (D0), 35 (D35) and 70 (D70) in two groups. There was difference (P<0.01) among days collected (0, 35 and 70) with means of 424.30 kg, 480.70 kg and 502.60 kg, respectively, but there was not difference between groups. There was not difference among groups to semen, eritrogram, cortisol (G1 = 3,19 µg/dL; G2 = 2,91 µg/dL) and testosterone (G1 = 274,48 ng/dL; G2 = 509,65 ng/dL). The results exposed allow concluding that were not observed significative effect of the nutraceutic upon evaluated parameters: body weight, semen, hormonal profile and eritrogram.

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Body morphometry and temporary weaning (TW) associated to two protocols of fixedtime artificial insemination (FTAI) with intravaginal progesterone releasing device (IPRD) upon pregnancy rates were evaluated. Cows, at 45-59 days post-partum, were randomly divided into group 1 (n=147) and group 2 (n=197). Group 1: received 1g progesterone (IPRD) and 2mg estradiol benzoate on day 0 (EB-D0); 150g D-cloprostenol on day 7 (PGF-2-D7); 0,5mg estradiol cypionate and (TW-48 hours) on day 9 (EC+TW-D9); FTAI on day 11 (D11); group 2: IPRD+EB (D0); PGF-2+EC+TW (72 hours) on D8; FTAI (D11). The pregnancy rate was higher in cows submitted to TW (72 hours) than in cows with TW (48 hours), or rather, 49.74% vs 30.60% (p<0.05). There was a statistical difference (p<0.05) in groups 1 and 2 between pregnant or non-pregnant cows with regard to body weight (412kg vs 400kg and 419kg vs 390kg) and body condition score (BCS) (3.33 vs 3.08 and 3.53 vs 3/32) respectively. Further, 72-hour weaning associated to the applied protocol improved the pregnancy rate. The evaluation of BCS during post-partum may adjust the start of the breeding season.Keywords: calf, temporary weaning, FTAI, zebu cows, post-partum. RESUMOO presente trabalho teve o objetivo de avaliar a morfometria corpórea e a remoção temporária dos bezerros (RTB), em dois protocolos de inseminação artificial em tempo fixo (IATF) com dispositivo intravaginal liberador de progesterona (DILP), sobre as taxas de prenhez. Vacas com 45 a 59 dias pós-parto foram divididas em grupo 1 (n=147) e grupo 2 (n=197), recebendo no grupo 1: 1g progesterona e 2mg de benzoato de estradiol no dia zero (DILP+BE-D0); 150g de D-cloprostenol sódico no dia 7 (PGF-2-D7); 0,5mg de cipionato de estradiol e RTB (48 horas) dia 9 (CE+RTB-D9); IATF dia 11 (D11) e grupo 2: DILP+BE (D0); PGF-2+CE+RTB-72 horas (D8); IATF (D11). A taxa de prenhez foi maior em vacas submetidas à RTB por 72 horas, em relação à de 48 horas; 49,74% × 30,60% (p<0,05). Houve diferença (p<0,05) nos grupos 1 e 2 entre vacas prenhes e não prenhes para peso (412kg × 400kg; 419kg × * fernandoputti@tupa.unesp.br Brazilian Journal of Biosystems Engineering v. 9(4): 348-357, 2015 349 390kg) e condição corporal (ECC) 3,33 × 3,08; 3,53 × 3,32, respectivamente. A RTB de 72 horas, associada ao protocolo pode ter elevado a taxa de prenhez. A avaliação do ECC durante o pós-parto pode ser usada para estimar o início da estação de monta.Palavras-chave: bezerro, remoção temporária, IATF, vacas zebu, pós-parto.