Calidad seminal en ovinos pelibuey con inclusión de Hibiscus rosa-sinensis en la dieta

Abstract

: 07-11-2014: 07-11- Aceptación: 11-07-2015 Abstract Introduction: feeding for sheep production in the tropics accounts from 48 to 90% of total production cost; additionally, the use of grains also makes producers dependent on the international market. Moderate weight gains in rams could be obtained with foliage from tropical trees; however, some plants such as Hibiscus Rosa-sinensis have compounds that could act as phytoestrogens, which could compromise its potential use as animal feed.Method: twelve Pelibuey rams, aged 24±3 months old, 45±6 kg live weight and a body condition score of 2.3±0.3 in a scale from 1 to 5, were assigned to one of two treatments for 45 days. T1 (n = 12), commercial feed (500 g d -1 by sheep) with 16% CP, and T2 (n = 12), 20% of H.rosasinensis (451 g DM kg MV ~ 1.6 kg d-1 per animal). Both treatments were supplemented with (Pennisetum purpureum x P. Typhoides var. grass. Parameters of semen quality were evaluated: ejaculate volume (Vol, mL) and concentration (EC, millions per mL) and eight individual motility parameters were used: curvilinear speed (VCL, µ/s), straight line velocity Calidad seminal en ovinos pelibuey con inclusión de Hibiscus rosa-sinensis en la dieta

Evaluation of seminal characteristics of Pelibuey and East Friesian rams at two different times of the year

“…Benítez (2011) also confirmed the importance of scrotal circumference as a variable that must be correlated with body weight, sperm concentration and ejaculate volume. In this regard, sperm concentration in the present study for R1 (Pelibuey) during the non-breeding season was 3.31.5310 9 mL 1 and during the reproductive season was 4.350.2010 9 mL 1 , an increase during the reproductive season, coinciding with the reported (4.0510.729 mL 1 ) by Maza-Gamboa et al (2015) for Pelibuey rams. While, for the East Friesian breed, in the present study, a mean of 3.61.5010 9 mL 1 and in the reproductive season of 4.170.2010 9 mL 1 being higher than that reported by Delgado-Cásares (2013) who obtained an average of 2.010 9 mL 1 , in wool breeds.…”