ResumoO objetivo foi determinar o efeito do sistema de alimentação e do período do ano sobre as medidas corporais e da carcaça de cordeiros abatidos na Cooperativa Cooperaliança (Guarapuava-PR). Cordeiros Ile de France e cruzados (n=253) foram avaliados quando apresentavam, em média, 39,6 kg de peso corporal ao abate, e em três períodos, entre Abril e Setembro de 2010. Foram identificados 4 sistemas alimentares na terminação dos cordeiros: a) ovelhas em pastagem + cordeiros (creep-feeding; n=67) ; b) ovelhas + cordeiros em pastagem e não suplementados (n=47); c) ovelhas e cordeiros em pastagem e suplementados com ração concentrada (n=30); d) sistema irregular de terminação (n=109). Foram realizadas medidas in vivo e por ultrassonografia antes do abate e medidas na carcaça antes e após refrigeração. Cordeiros entregues para o abate entre o final do mês de agosto e a primeira quinzena do mês de setembro apresentaram resultados superiores (p<0,05) quanto ao desenvolvimento muscular, rendimento de carcaça fria e espessura de gordura subcutânea na carcaça, quando comparados aos abatidos nos meses de abril e junho. Concluiu-se que o sistema de alimentação com suplementação das ovelhas e cordeiros não desmamados resultou em melhores características para as medidas corporais e na carcaça, comparado aos demais sistemas. Palavras-chave: Compacidade, condição corporal, estado de engorduramento, ovinos, pH AbstractThe objective was to determine the effect of feeding system and time of the year on the in vivo and carcass characteristics of lambs slaughtered at the Cooperative Cooperaliança (Guarapuava-PR). Ile 1 Projeto de Pesquisa financiado pelo CNPq.
The demand for beef cattle with specific traits is evident from sales in auctions. While purchasing, buyers consider individual traits (e.g., muscularity, frame, racial composition, and weight) as predictors of quality, and adjust their bids according to their preferences. The present study aimed to evaluate the effect of phenotypic and racial characteristics in determining the final sale price of calves of beef cattle in official auctions at the western border of the state of Rio Grande do Sul, Brazil. Five-hundred and seven lots of calves sold in calf auctions from five cities on the western border of Rio Grande do Sul were evaluated. The assignment of visual scores was based on their genetic group, frame, muscularity, and coat. Analysis of variance and the Tukey test at 5% significance level were performed for comparing the final average prices. Variables with the greatest impact on price were the genetic group and the size of the animals. Animals of synthetic breeds obtained higher value in the three years studied and animals without racial definition showed considerable devaluation and a decrease in supply. Larger animals had less value.
RESUMO -O objetivo deste experimento foi comparar a eficiência de um programa hormonal associado ao desmame temporário por 96 horas na indução do estro e ovulação com o desmame definitivo aos 60 dias em vacas de corte. Foram utilizadas 183 vacas de corte amamentando, das raças Charolês (C), Nelore (N) e suas cruzas recíprocas, as quais foram genotipadas como homozigotas (HOM) ou heterozigotas (HET) para o microssatélite (STR) BMS3004, que está localizado no mesmo cromossomo do gene da cadeia β do LH. Entre 60 e 80 dias pós-parto (dia 0), as vacas foram distribuídas em dois grupos. No grupo indução hormonal (IH), as vacas (n=87) receberam (dia 0) 250 mg de acetato de medroxiprogesterona por 8 dias, 2,5 mg de benzoato de estradiol (dia 1) e 500 UI de gonadotrofina coriônica eqüina (dia 7). No dia 8, os bezerros foram desmamados por 96 horas. No mesmo dia (dia 8), as vacas (n=96) do outro grupo apenas foram submetidas ao desmame definitivo (grupo DP). Após, procedeu-se 4 dias de inseminação artificial (IA) e, passado esse período, foram entouradas. O primeiro diagnóstico de gestação (DG) foi realizado 60 dias após o período de IA e, o segundo, 60 dias após o final do entoure. As taxas de estro foram maiores nas vacas do grupo IH em relação as do grupo DP. As vacas com condição corporal 2,5 e 3,0 apresentaram menores percentuais de prenhez ao 1ºDG no grupo IH (29,6 e 46,4%) em relação ao grupo DP (56,0 e 72,2%). Os percentuais de prenhez das vacas com índice corporal 65-73 não diferiram entre os grupos IH e DP. As vacas N do grupo IH, apresentaram menor percentual de prenhez ao 1ºDG que as F1 (27,7 vs. 64,2%), mas não diferiram em relação às C (40,0%). No grupo IH, o percentual de prenhez ao 2ºDG foi menor nas vacas HOM do que nas HET. O desmame definitivo precoce mostrou-se mais eficaz no incremento dos percentuais de prenhez em vacas de corte.Palavras-chave: indução hormonal, pós-parto, condição corporal, índice corporal, marcador molecular, polimorfismo de DNA Hormonal Induction of Ovulation and Early Weaning in Postpartum Fertility of Homozigous and Heterozigous Beef Cows for the Microsatellite BMS3004ABSTRACT -The aim of this experiment was to compare the efficiency of a hormonal protocol, associated to the temporary weaning for 96 hours, with the definitive weaning at 60 days in beef cows, for the induction of estrus and ovulation. One hundred and eightythree suckled beef cows were used. The breeds of the cows were Charolais (C) and Nellore (N) and their crosses. The animals were genotyped as homozygous (HOM) and heterozigous (HET) for the microsatellite BMS3004, that is localized in the same chromossome of the LH β chain gene. The cows were distributed in two groups between 60 and 80 days postpartum (day 0). In the hormonal induction group (HI), the cows (n=87) received (day 0) 250 mg of medroxiprogesteron acetate for 8 days, 2.5 mg of estradiol benzoate (day 1) and 500 UI of eCG (day 7). On day 8, the calves were weaned for 96 hours. In the same day (day 8), the cows (n=96) of the other group were just submi...
This study aimed at analyzing and comparing the phenotypic characteristics of height, body length, and fleece wool fineness with the liquidity and final price sold in auctions in the city of Uruguaiana, RS, Brazil, for three consecutive years (2015 to 2017). A total of 412 one-year-old (two teeth) male sheep, of the Australian Merino (n = 50), Polwarth (n = 130), and Corriedale (n = 232) breeds were evaluated. Height and length of the animals were measured on the day of the auction with a measuring tape, and animals were grouped into small or tall and short or long categories, as defined in this study. Wool fineness was measured using an Optical-based Fibre Diameter Analyser (FDA 2000) device and classified according to official wool classification standards (the Bradford System). There was no statistical difference in the average selling price of different breeds. There was a correlation between the breed and liquidity, in which Corriedale lambs were sold more than the Polwarth lambs, as expected; however, there was no such correlation for Merino lambs. The tall Merino lambs were sold at a higher selling price
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