The objective this study was to evaluate the effect of different doses of Moringa oleifera leaf extract (MOE) on milk production and milk composition in ewes and on preweaning performance of their lambs. Twenty-four lactating ewes were housed individually with their lambs and assigned to four groups in a completely randomized design. The treatments included a basal diet without MOE (MOE0) or a basal diet supplemented with either 20 mL MOE per ewe per day (MOE20), 40 mL MOE per ewe per day (MOE40) or 60 mL MOE per ewe per day (MOE60). Over 45 days, milk production was recorded weekly and individual milk samples were collected for chemical analysis. Milk yield, fat-corrected milk and daily yields were similar among the four treatments. The supply of MOE did not affect ewe weaning efficiency and average daily gain or litter weaning weight of the lambs. Overall, the results from this study showed that dietary supplementation of hydroalcoholic extracts of Moringa oleifera leaves at doses of 20, 40 or 60 mL/ewes/d in lactating ewes does not have negative effects on milk yield, milk composition or lamb performance.

Se evalúo el efecto de la inclusión de Moringa oleifera Lam. y Trichanthera gigantea (Bonpl.) Nees en la dieta de ovinos de pelo (Pelibuey) sobre su calidad seminal. Durante 90 días, se dividieron las dietas de 15 ovinos (24 kg ± 3.95) en tres tratamientos: T1: dieta integral con 30% de M. oleifera + pasto Taiwán (Pennisetum purpureum Schumach.), T2: dieta integral con 30% de T. gigantea + pasto Taiwán y T3: alimento comercial + pasto Taiwán. Se determinaron la ganancia diaria de peso (GDP), rendimiento de la canal (RC), desarrollo testicular (DT) (determinado por el ancho (AE) y la circunferencia escrotal (CE)), el volumen del eyaculado, concentración y motilidad, viabilidad (SYBR-14/IP), actividad mitocondrial (J-C1) e integridad acrosomal (FITC-PSA) en los espermatozoides. No se encontraron diferencias (p>0.05) en la GDP y RC. Se encontraron diferencias (p˂0.05) en el DT, los T1 (AE = 48.84±5.99 mm, CE = 26.48±1.13 cm) y T3 (AE = 48.83±4.34 mm, CE = 26.62±1.27 cm) presentaron valores más elevados que T2 (AE = 44.57±5.59 mm, CE = 25.42±1.50 cm); en la viabilidad, T2 (62.90±6.10%) y T1 (54.00±6.61%) poseen mayores porcentajes que T3 (24.45±7.56%); en la motilidad, T1 (93.9± 2.1%) y T2 (88.6±1.9%) tuvieron mayor porcentaje que T3 (71.9± 4.0%). La inclusión de M. oleifera y T. gigantea en la dieta permite obtener una GDP, RC y DT similar al alimento comercial e incrementa más del 20% de las células espermáticas viables; también mejora algunos parámetros de motilidad, lo que incrementa el potencial reproductivo de los sementales.

The body weight (BW) of an animal is a vital economic trait that might help in decision-making in the handling of animals. The objective of the present study was to develop equations for the prediction of BW in Pelibuey sheep using scrotal circumference (SC). The BW (23.40 ± 6.96 kg) and SC (20.25 ± 6.19 cm) have been recorded in 405 male Pelibuey at the Southeastern Center for Ovine Integration, Mexico. Linear, logarithmic, quadratic, exponential, cubic, and power regression models were used for data analysis. Pearson correlation (R), Coefficient of determination (R²), Adjusted coefficient of determination (Adj.R²) Root mean square error (RMSE), Akaike information criterion (AIC), and Bayesian information criterion (BIC) were used to select the best model. Power regression model showed the highest R (0.93), R² (0.86), Adj.R² (0.86) and lowest RMSE (0.02), AIC (-989.44) and BIC (-981.44). The current study suggests that SC might be used as the only predictor for BW of growing Pelibuey sheep raised under tropical conditions.

Objective: The Mexican hairless pig (Sus scrofa) is a species with high degree of rusticity and environmental adaptation, capable of being included in genetic improvement programs and participant in food sovereignty. As a monogastric animal, its diet is diverse, which could include grains and fodders. However, there are few records about current alternatives used in its diet that are capable of improving the yields and quality of the meat. In the Yucatan Peninsula there are native corns with fodder potential, capable of being used in animal feed. The objective of this review was to show the potential of native corns, and their capacity to be used in the diet of the Mexican hairless pig. Design/Methodology/Approximation: A systematic review of the literature from the period 2000 to 2020 was carried out, where the potential of Creole corns to be used in animal feed was documented, both because of their yields in grain and their plant biomass production. Results: Based on the information analyzed, the use of San Pableño, Dzit bacal, and Nal Tel breeds is recommended, for their inclusion in the diet of the Mexican hairless pig due to their nutritional, mineral and antioxidant value. Study Limitations/Implications: There are studies pending to allow understanding the form and quantity to supply them in the diet. Findings/Conclusions: Creole corns that are present in the Yucatan Peninsula present high rusticity and agroclimatic adaptation, with productive potential to compete with the commercial varieties and hybrids, in the production of corn grain and fodder, reason why they can be used in the diet of the Mexican hairless pig, since it is an animal species of great adaptation.

The objective of this review is to present an overview of the potential of tanniferous trees for the control ofgastrointestinal nematodes in sheep in the tropics. A systematic review of scientific articles in various databaseswas carried out on the potential of tropical tanniferous trees, their effect on the control of gastrointestinalparasites and the improvement of weight gain, a range of 16 years (2006-2022) was considered in thepublications consulting a total of 150, of which 46 were related to the topic for the selection of information, atotal of 31 scientific articles were obtained, which were considered. Table 1 shows that foliage extracts of speciesconsidered tanniferous such as L. leucocephala cause inhibition of the hatching of eggs and on the infective larvaL3 of H. contortus. The bibliographic evidence consulted allows us to elucidate that the use of tropical trees withforage potential and high contents of condensed tannins in their tissues can be successfully used for the controlof gastrointestinal nematodes in vitro and in vivo. The largest percentage of those consulted used tannin-bearingplant extracts that have been shown to have anthelmintic properties and high nutrient content, making thema viable and economical alternative for feeding small ruminants in production systems in tropical areas due totheir consumption preference and their high nutrient content.