U. G. P. de Abreu

Análise de características reprodutivas indicadoras de puberdade em tourinhos Pantaneiro

EnglishThe Pantaneiro cattle are descendant from animals brought by settlers in the beginning of the colonization of Brazil. Ten months old Pantaneiro steers, raised under pasture conditions in Brazil, were used to study puberty. Monhtly measurement of scrotal circumference and testicular width and length were recorded. Semen was collected by eletroejaculation and evaluated according to physical and morphological aspects. Penile and prepuce detachment percentages were also evaluated. The ages of first spermatozoa presence in the ejaculate, first motile spermatozoa in the ejaculate, seminal puberty and detachment between penis and prepuce was studied. portuguesDescendentes de animais oriundos da Penin- sula Iberica, os bovinos Pantaneiros foram introduzidos no Brasil na epoca do descobrimento. Caracteristicas reprodutivas foram monitoradas em dez tourinhos, no intervalo de idade de dez a vinte meses, criados em pastagens nas condicoes de Brasil central com objetivo de determinar a idade a puberdade. Mensalmente eram mensuradas a circunferencia, o comprimento e a largura testicular. O semen foi coletado e os aspectos de morfologia e fisicos do ejaculado avaliado. Foi avaliada a idade do desprendimento entre penis e prepucio, do aparecimento da primeira celula espermatica, da primeira celula espermatica movel e da puberdade seminal.

Potencial leiteiro de animais da raça Pantaneira na região do Alto Pantanal do Mato Grosso do Sul

Este trabalho teve como objetivo determinar o periodo de lactacao e uma composicao fisico-quimica do leite das vacas da raca panteira. ABSTRACT: The Pantaneira breed is in danger of extinction. Due to the lack of scientific information on the Pantanal milk potential, this work had the objective of determining the lactation period and a physical-chemical composition of the milk of cows in second order of parturition. The animals were managed in a pasture system rotated in mombaca grass (Panicum maximum) and individually supplemented with concentrate. The milking was performed mechanically twice a day and the milk weighed daily. The physical-chemical characteristics of the milk were evaluated by the ultrasound method and the lactation curves were estimated using the univariate parameter. The average milk yield was 5.34kg/milk/ day and the fat, protein, lactose and total non-fat solids contents were 5.3, 3.7, 6.0 and 10.7%, respectively. Lactation of the cows in second order of calving ended naturally at 180 days and the peak of milk production was reached between 51 and 60 days. Furthermore, there was no difference in milk composition in the different lactation periods.