Resumo O objetivo deste estudo foi caracterizar a dinâmica de alguns parâmetros hematológicos em cordeiros recém-nascidos sadios, antes e após a ingestão de colostro. Foram coletadas amostras sanguíneas de 28 cordeiros recém-nascidos, determinando-se o eritroleucograma, as concentrações de proteína plasmática total (PPT) e de fibrinogênio nos momentos pré e pós-colostro. Os dados foram analisados comparando-se a variabilidade dos parâmetros entre os dois momentos. O hematócrito (P<0,001), a concentração de hemoglobina (P<0,05) e o volume globular médio (VGM) (P<0,05) diminuíram após a ingestão de colostro, enquanto a concentração de hemoglobina globular média (CHGM) aumentou (P<0,01) no momento pós-colostro. Houve aumento no número de leucócitos totais (P<0,001) e nas contagens absolutas de neutrófilos segmentados (P<0,05) e de linfócitos (P<0,01) após a ingestão de colostro. As concentrações de PPT e de fibrinogênio também aumentaram no momento pós-colostro (P<0,001 e P<0,01, respectivamente). O eritroleucograma, as concentrações de PPT e de fibrinogênio variam consideravelmente antes e após a ingestão de colostro, sendo modificados em função da própria ingestão do colostro e/ou da adaptação dos processos fisiológicos do animal à vida extrauterina. Portanto, recomenda-se que a interpretação de hemogramas realizados em cordeiros recém-nascidos seja feita com base em intervalos de referência específicos para o período neonatal.

Abstract The aim of this study was to characterize the dynamics of some hematological parameters in healthy newborn lambs before and after colostrum intake. Blood samples of 28 newborn lambs were collected, determining the erythro-leukogram, the total plasma protein (TPP) and fibrinogen concentrations in pre and post-colostrum moments. The data were analyzed comparing the variability of the parameters between the two moments. The packed cell volume (P<0.001), the hemoglobin concentration (P<0.05) and the mean corpuscular volume (MCV) (P<0.05) decreased after colostrum intake, while the mean corpuscular hemoglobin concentration (MCHC) increased (P<0.01) at the post-colostrum moment. There was an increase in the total white blood cell count (P<0.001) and in the absolute counts of segmented neutrophils (P<0.05) and lymphocytes (P<0.01) after colostrum intake. The TPP and fibrinogen concentrations also increased at the post-colostrum moment (P<0.001 and P<0.01, respectively). The erythro-leukogram, the TPP and fibrinogen concentrations vary considerably before and after colostrum intake, being modified according to the own colostrum intake and/or the adaptation of the physiological processes of the animal to the extrauterine life. Therefore, it is recommended that the interpretation of complete blood cell counts performed in newborn lambs be made based on the specific reference intervals for the neonatal period.

This study intended to evaluate three identification devices for adult goats reared in semi-intensive system. They were (1) the ruminal bolus, electronic identification device composed of non-toxic ceramic and weighing 74.4 g; (2) small ear tag on left ear, visual identification device with dimensions of 50 × 15mm; and (3) big ear tag on right ear, also a visual identification device with dimensions of 42 × 48 mm. Twenty-two crossbred Boer female goats with mean age of 4 years and mean body weight (BW) of 52.6 kg were used. The identification devices were applied on all animals. Time spent for administration/application, readability and retention rate of devices were assessed. Problems during and after the application of devices, as well as device losses were recorded. Evaluations were performed one day and one week after application, then, monthly, for six months. The time spent for administration/application of the devices showed mean of 21 s and was similar between the evaluated devices. One big ear tag was lost, which decreased the retention rate of this device to 95.5%. The other devices showed retention rate of 100%. The readability was 100% for all studied devices. Small ear tags and ruminal boluses used in this study are recommended for adult goats. Production systems, environment, and ear tags with large dimensions may affect the retention rates of these visual identification devices.

Objetivou-se analisar os custos e a rentabilidade de sistemas de produção de ovinos em pastagem sob três estratégias de suplementação de cordeiros lactentes: (1) creep grazing de trevo branco; (2) creep feeding; e (3) sem suplementação. Utilizaram-se dois métodos de análise financeira: análise anual (de curto prazo) e de fluxo de caixa (de longo prazo). Os custos foram segmentados em variáveis, fixos, operacionais e totais. O fator de produção que exerceu maior influência no custo variável da produção foi a alimentação, e no custo total foi o custo de oportunidade do capital imobilizado. O sistema com creep grazing não apresentou resultados econômico-financeiros superiores aos com creep feeding.

The objective was to analyze production costs and profitability of grazing sheep productions systems under three strategies of lamb's supplementation: (1) white clover on creep grazing; (2) creep feeding; and (3) not supplemented. Two methods of financial analyses where used: annual (short term) and cash flow (long term). Costs were classified into variable, fixed, operational and total. Results showed that feeding and opportunity cost over investment was the most important production factors at variable and total costs, respectively. System with creep grazing supplementation did not show greater economic financial results over creep feeding supplementation system.