Biometria testículo-epididimária e reserva espermática ovinos (ovis aries) deslanados criados no Estado do Ceará

• Autor(a) principal: Monteiro, Alexandre Weick Uchôa
• Data de Publicação: 2007
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: Repositório Institucional da Universidade Federal do Ceará (UFC)
• Texto Completo: http://www.repositorio.ufc.br/handle/riufc/1181
• topic: Alimentos - Valor Nutritivo; Biometria; Ovinos - Reserva epididimária

The aim of this study is to correlate reproductive parameters of easy measurement to represent the reproductive capacity of a male sheep The biometric parameters of the testis and epididymis (length, midth, thickness and weight) of 38 SPRD ram were measured as well as the sperm concentration of the epididymis tail (CECE) and epididymis fluid volume (VFE) contained in the tail. The scrotal circunference (SC) and weight of each animal was measured before slaughter. The age was determined by dental chronology. The spermatozoids epididymis concentration was determined in a Neubauer chamber. All results were expressed by mean and standard deviations. The correlations were calculated by the Person method using the procedure “Proc Corr” of SAS (1999). No significant difference was observed (p>0,05) between the measured parameters of right and left sides of the testis and epididymis biometry. The means and standard deviations obtained for CE, PT, LT, ET, PTE, PCE, PCOE, PCAE, CCAE, LCAE, ECAE were:27,82 + 1,77 cm; 123,97 + 26,58 g; 7,83 + 0,79 cm; 5,74 + 0,48 cm; 4,57 + 0,54 cm; 18,63 + 3,96 g; 6,95 + 1,48 g; 3,45 + 0,87 g; 8,36 + 2,13 g; 3,03 + 0,44 cm;2,22 + 0,2 cm and 1,65 + 0,23 cm, respectively. The sperm concentration of the sperm reserve in the epididymis tail was 2,47 + 1,00 sptz billion for mL. The weight parameters (alive, of the testis and epididymis) showed moderate and significant correlations. The alive weight had medium and significant correlation (p> 0,0001) with biometrics measures of the epididymis tail:CCAE, LCAE and ECAE ( r=0,59; r=0,60 and r=0,59 respectively). LT behaved as good indicator of testis and epididymis development, and could be extrapolated with PT (r=0,88), CE (r=0,57), PTE (r=0,60). CE presented moderate correlations (r=0,38 to 0,69) varying with testis and epididymis measures, and the better correlated measures were PT with r=0,69, CT and LT with r=0,57, respectively. The CCAE parameter presented a better relationship with the majority measurements, mainly the testis (r=0,54 to 0,58) and epididymis characteristics (r=0,48 to 0,73); CCAE parameter also presented positive and moderate correlation (r=0,50) with the epididymis tail volume collected.CECE and VFE presented low and medium correlations, although positive, with the testis and epididymis measures. The characteristic less correlated with all the others measurements, besides the ones expressing negative coefficients, was the thickness of the scrotal fold. The LT and CCAE parameters can be included in the biometry measurements (Live Weight, PE…) of the male reproductive tract to help the precocious selection of male sheep.