Roger Esteves

Morfologia, características da carcaça e componentes do peso vivo em borregos Corriedale e Ideal

The objective of this study was to compare Corriedale and Polwarth breeds as to morphologic and carcass characteristics, as well as, to evaluate liveweight and liveweight components variation. Forty wethers (castrated at 30 days of age), were used (19 Polwarth and 21 Corriedale), weaned at 70 days, and slaughtered with one year of age. Animals were raised under extensive native pasture conditions at Embrapa Pecuaria Sul - CPPSUL, Bage, RS. Laboratory measurements were carried out at the Animal Science Department of Universidade Federal de Pelotas, in Pelotas, RS. Corriedale breed showed higher values (P 0.05). Corriedale breed presented higher slaughtering weight and higher hot carcass weight. Polwarth showed lower cooling losses, both in weight and percentage (P 0.05). Corriedale wethers presented higher weight for feet and lungs and lower weight for internal fat. In relative values, Polwarth wethers showed higher proportion of liver and internal fat. It is concluded that morphological differences are observed only in live animals. Liveweight components showed quantitative and qualitative differences for both breeds.

Influência da castração e da idade de abate sobre as características subjetivas e instrumentais da carne de cordeiros Corriedale

The objective of this trial was to evaluate the effects of castration and slaughtering age on subjective and instrumental characteristics of meat from Corriedale lambs raised on native pasture. Sixty male lambs (30 castrated and 30 intact) slaughtered at 120, 210 and 360 days of age were used in this experiment. The Longissimus dorsi muscle was used for all meat evaluations and analysis. No significant castration ´ slaughtering age interaction was observed for the studied variables. A significant slaughtering age effect was found for meat fat thickness and marbling, which had lower scores in animals slaughtered at more advanced age as well as for all instrumental characteristics of the meat, mainly tenderness that was reduced in older lambs. However, a significant castration effect was observed only for meat color (brightness according to the CIELAB system). It can be concluded that meat quality from Corriedale lambs grazing native pasture was not affected by castration. Slaughtering age affected meat quality with lambs slaughtered at 120 days of age showing the best results.

Avaliação da época de nascimento sobre o desenvolvimento corporal e os rendimentos pós-abate de cordeiros da raça Texel

Forty-nine intact Texel lambs were used to evaluate the effects of different birth periods (August vs. November) on body development, body measurements and carcass characteristics. Animals were maintained in pasture and slaughtered in December for those born in August and April for those born in November at 129 and 164 days of age, respectively. Prior to slaughtering forage yield was estimated by the Botanal technique, which showed that animals born in August had access to better quality pasture. These lambs had greater retail and true carcass yields, hot and cold carcass weights, and carcass fat score and covering fat than those born in November. However, green viscera yield was higher in lambs born in November probably due to the observed differences in pasture nutritional conditions. It can be concluded that birth period affected carcass characteristics in the present trial.

COMPONENTES CORPORAIS EM OVINOS CORRIEDALE NÃO CASTRADOS, CASTRADOS E CRIPTORQUIDAS ABATIDOS EM DIFERENTES IDADES

O presente estudo objetivou verificar o efeito da castracao, da idade de abate e da interacao castracao x idade, assim como do peso corporal sobre os componentes corporais em ovinos Corriedale. Foram utilizados 57 animais criados em condicoes extensivas, alimentados com pastagens nativas, no municipio de Pedras Altas, Rio Grande do Sul, Brasil. Os cordeiros foram desmamados aos 120 dias de vida, sendo abatidos 21 animais aos 120 dias (sete nao castrados, sete castrados e sete criptorquidas induzidos), 18 abatidos aos 210 dias de idade (seis nao castrados, seis castrados e seis criptorquidas induzidos) e 18 abatidos aos 360 dias de idade (tres nao castrados, sete castrados e oito criptorquidas induzidos). Atraves da analise de variância dos dados verificou-se efeito da interacao castracao x idade de abate para os componentes corporais: penis em kg e porcentagem e para porcentagem de patas. Houve efeito da castracao para: testiculos em valores absolutos (kg) e em valores relativos (%). A idade de abate apresentou efeito significativo sobre: carcaca quente (%), cabeca (kg), patas (kg), pele (kg e %), visceras verdes (kg e %), pulmoes (kg e %), baco (kg e %), figado (kg e %), rins (kg), gordura pelvica (%) e bexiga (kg). O peso corporal evidenciou influencia significativa sobre: carcaca quente (kg e %), visceras verdes (kg e %), pele (kg e %), cabeca (kg e %), pulmoes (kg), figado (kg), coracao (kg e %), rins (kg), diafragma (kg) e baco (%). Conclui-se que houve efeito da castracao, da idade de abate e da interacao desses fatores, assim como do peso corporal sobre os componentes corporais em ovinos da raca Corriedale e que estes fatores devem ser considerados na uniformizacao e valorizacao para um entendimento da cadeia produtiva e comercial.

The Role of the Abdominal Vessels for Vascular Access in Difficult Cases

Abstract Central venous obstruction of the upper limbs is a common problem in patients on long-term dialysis therapy. Some of them have exhausted all suitable vessels, including those from the lower limbs, because of previous catheter, arteriovenous fistula or graft placement. These are considered difficult cases and the search for other options, like the iliac vessels or the vena cava, become a challenge for both nephrologists and surgeons. We report our experience in six patients (five female and one male, average age 62) over a seven year period, all of whom underwent an arteriovenous graft to the abdominal vessels: four cases of femoral artery-iliac vein, one case of femoral artery-vena cava and one case of iliac artery-vena cava. The mean primary patency was 2.8 years. Arteriovenous grafts to the abdominal vessels are a valid and durable option whenever other alternatives (upper limb and thigh) are exhausted. The graft configuration as described above, provides high flow, a long segment for comfortable puncture and easy access for eventual PTA vein stenosis revisions.