Características físicas de la carne de corderos Katahdín con Pelibuey alimentados a base de forraje y concentrado

Objective: To evaluate the effect of forage and concentrate in diet on physical characteristics of meat of crossed (F1) Katahdin with Pelibuey lambs. Design/methodology/approach: Thirty-six entire male lambs were distributed in a completely randomized design to four treatments: 1) 100% Concentrated food (CF) with 15 % of CP; 2) 70% CF + 30% of Maralfalfa forage (Pennisetum sp); 3) 70% CF + 30% of Mombaza forage (M. maximum); 4) 70% CF + 30% CT-115 forage (P. Purpureum). Results: No effect of diet on carcass traits and physical properties of meat was found (P> 0.05). The average value of pH and temperature ± SD were 5.58 ± 0.12 and 6.38 ± 0.56 o C, respectively. The little loss of water in meat (0.1%), indicates that it retains its physical-chemical characteristics for storage. Limitations on study/implications: Consumer demands of lamb meat are more focused on quality traits than quantity details, so, in order to comply with demands demanded by market, it is necessary to carry out meat quality evaluations, compare between breeds and feeding systems to determine which genotype produces the best meat. Findings/conclusions: Lambs fed diets that include forage have similar physical characteristics of meat to those that received only concentrate food, which indicates that it is possible to produce lamb meat with excellent properties, using diets with good quality forage.Objetivo: Evaluar el efecto del forraje y concentrado en la dieta sobre las características físicas de la carne de corderos cruzados (F1) Katahdín × Pelibuey (KtPb). Diseño/metodología/aproximación: Treinta y seis corderos machos enteros fueron distribuidos mediante un diseño completamente al azar a cuatro tratamientos:1) 100% Alimento concentrado (AC) con 15 % de PC: 2) 70% AC + 30% de pasto Maralfalfa (Pennisetum sp); 3) 70% AC + 30% pasto Mombaza (M. maximum ); 4) 70% AC + 30%   CT-115 (P. Purpureum). Resultados: No se encontró un efecto de la dieta sobre las características de la canal y propiedades físicas de la carne (P>0.05). Los valores promedio para el pH y temperatura ± DE encontrados fueron de 5.58 ± 0.12 y 6.38 ± 0.56 o C, respectivamente. La poca pérdida de agua en la carne (0.1%), indica que esta conservo sus propiedades físico-químicas adecuadas para su almacenamiento Limitaciones del estudio/implicaciones: Las demandas de los consumidores de cortes de cordero se centran más en los rasgos de calidad que en los detalles de cantidad. Para poder cumplir con los estándares que exige el mercado, es necesario realizar evaluaciones de calidad de la carne, comparar entre razas y sistemas de alimentación para conocer cual fenotipo produce la mejor carne. Hallazgos/conclusiones: Los corderos alimentados con dietas que incluyen forraje tienen características físicas de la carne similar a los que recibieron solo concentrado, lo que indica que es posible producir carne de corderos con excelentes propiedades, utilizando dietas con forrajes de buena calidad

Predicción de las características de la canal en ovejas Pelibuey de desecho por medio de ultrasonido

The objective of present study was to predict the carcass characteristics of 28 discarded Pelibuey ewes (41.01 ± 8.43 kg) using ultrasonography. The ultrasonic measurements of fat thickness (FT), area, (LDA), depth (DLD) and width (WLD) of the Longissimus dorsi, between the 12th and 13th thoracic vertebra and between the 3rd and 4th lumbar vertebra, were performed 24 h before slaughter. At the slaughter, hot carcass, internal organs and internal fat were weighed. The carcasses were divided in two half, refrigerated (1 °C; 24 h) and the chilled carcass were weighed. Then were dissected and weighed in the main tissues. With the data it was calculated the correlation coefficients between the variables and their relationships were estimated using regression models. It was observed that the ultrasonic measurements of thoracic and lumbar backfat thickness had a positive r2 that ranged from 0.51 to 0.66 (P<0.001) for prediction of the carcass weights; and an r2 from 0.44 to 0.57 (P<0.001) to predict the carcass muscle quantity. It is possible to use the measurements of ultrasound as a tool for the evaluation of carcass characteristics in discarded Pelibuey ewes and it is possible to predict the carcass weights and edible tissues.El objetivo fue predecir mediante ultrasonografía las características de la canal de 28 ovejas Pelibuey (41.01 ± 8.43 kg) de desecho alimentadas en sistema intensivo, clínicamente sanas, no gestantes y no lactantes. Las mediciones ultrasónicas de espesor de grasa dorsal (EGD), área, (ALD), profundidad (PLD) y ancho (ALD) del músculo Longissimus dorsi, entre la 12.a y 13.a vertebra torácica y entre la 3.a y 4.a vértebra lumbar, se realizaron 24 h antes del sacrificio. Al sacrificio se pesó la canal caliente, así como los órganos internos y la grasa interna. Las canales se dividieron a la mitad, se refrigeraron (1°C; 24 h) y se pesaron en canal frío. Luego fueron diseccionadas y pesadas en sus principales componentes. Con los datos se calcularon los coeficientes de correlación entre variables y las relaciones se estimaron mediante modelos de regresión. Se observó que las mediciones ultrasónicas de grasa dorsal, torácica y lumbar tuvieron un r2 positiva de entre 0.51 y 0.66 (P<0.001) en la predicción de los pesos de la canal; y un r2 de entre 0.44 a 0.57 (P<0.001) para predecir el tejido muscular en la canal. Es posible utilizar las mediciones de ultrasonido como una herramienta para la evaluación de características de la canal de ovejas Pelibuey de desecho, y es posible predecir el peso de la canal y los tejidos comestibles

Effects of the inclusion of ground Pouteria sapota kernel on intake, digestibility, and growth performance in lambs

Simple Summary: The concept of sustainable diets that are profitable, ethical, socioculturally acceptable, and environmentally beneficial is emerging as one of the key solutions to ensure the efficiency of livestock production systems. In this regard, agro-industrial by-products obtained from fruit processing have emerged as an alternative. Mamey pulp generates residual biomass from which the kernel is the main by-product that, due to its composition, can be used as ruminant feed. This study determined the effects of the inclusion of ground mamey kernel on intake, digestibility, and growth performance in lambs. No effects on nutrient intake or productive performance were observed. However, protein and fiber digestibility were reduced by ground mamey kernel inclusion. These findings suggest that mamey kernels can be included in ruminant diets. Abstract: This study determined the effect of replacing ground corn and soybean meal with ground Pouteria sapota kernel (PSSM) in lamb diets on nutrient intake and digestibility, performance, and carcass traits. Twenty-one male hair sheep lambs with an average body weight of 22 ± 3.5 kg were randomly assigned to three treatment diets containing PSSM at 0, 10, and 20% of the total dry matter (DM) inclusion. The study lasted 60 days, which included 15 days for adaption and 45 days for sample collection. The PSSM inclusion did not affect intake or performance (p > 0.05). However, ether extract (EE) digestibility linearly increased (p < 0.0001), while crude protein (CP) and acid detergent fiber (ADF) linearly decreased. Final body weight, total weight gain, average daily weight gain, feeding efficiency, and carcass traits were not affected by PSSM inclusion. In conclusion, these results suggest that PSSM can replace up to 200 g/kg DM of ground corn and soybean meal without affecting intake or animal performance

effect of adding extra virgin olive oil to hair sheep lambs’ diets on productive performance, ruminal fermentation kinetics and rumen ciliate protozoa

Simple Summary: The use of added lipids in the diets of ruminants has been found to have beneficial effects. In this study, the effects of different doses of extra virgin olive oil on the productive traits and ruminal fermentation parameters in lambs were evaluated. The relationship between nutrient intake and digestibility was optimal with 2% oil inclusion. The concentration of propionic acid increased with 2 and 4% DM of olive oil, while butyric acid decreased. The intake of olive oil did not affect the population of protozoa or animal performance. The inclusion of olive oil in low concentrations (2% of DM) positively influences feed intake and nutrient digestibility in hair sheep lambs. Abstract: This study determined productive performance, ruminal fermentation kinetics and rumen ciliate protozoa in hair sheep lambs fed different levels of olive oil. Twenty-four growing lambs were used, with an initial live weight of 10.5 ± 2.9 kg, and randomly assigned into four treatments (six animals per treatment) containing increasing levels of extra virgin olive oil (0, 2, 4 and 6% of dry matter). Animals were fed for 80 days, and sampling was carried out weekly. Intake of dry matter (DM), organic matter (OM), crude protein (CP), neutral detergent fiber (NDF), acid detergent fiber (ADF) and metabolizable energy (ME) differed between treatments (p < 0.05), with a linear and cubic tendency to decrease when oil concentrations were increased. Digestibility coefficients of OM, CP and NDF were not affected; however, the relationship between total intake and nutrient digestibility (DM, OM, NDF, ADF) increased with 2% DM olive oil. Compared with all treatments, the concentration of propionic acid increased by 16% with 4% olive oil. The intake of olive oil did not affect the protozoa population and live weight gain. Overall, the inclusion of olive oil in low concentrations (2% of DM) positively influences feed intake and nutrient digestibility in hair sheep lambs

Calidad seminal de ovinos de pelo suplementados con Moringa oleifera (Moringaceae) y Trichanthera gigantea (Acanthaceae)

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

Prediction of carcass energy content of Pelibuey ewes by ultrasound measurements/ Predicción del contenido de energético de la canal de ovejas Pelibuey por mediciones de ultrasonido

The aim of this study was to evaluate the relationship between body ultrasound measurements (USM) and carcass energy content (CEC) of Pelibuey ewes. USM were taken 24 h before slaughter in twenty-two ewes. Fat thickness (FT) and Longissimus dorsi area (LDA) were determined in the thoracic (TFT and TLDA) and lumbar region (LFT and LLDA). CEC was considered as the sum of the energy of muscle and adipose tissues in the carcass. The correlation coecient (r) between body weight (BW) and CEC was 0.89 (p < 0.001). Nonetheless, correlations for LDA and CEC were not signicant (p > 0.05). The r2 for equation including BW and LFT was 0.87 (RSD= 15.34). The inclusion of LFT improved the prediction by about 8 %. The use of some USM in combination with BW provides good CEC estimates in Pelibuey ewe

Using the 9th–11th rib section to predict carcase tissue composition in Blackbelly sheep

The study aimed at developing predictive equations to estimate carcase tissue composition in Blackbelly sheep using the 9th–11th rib section and to evaluate its accuracy and precision. Twenty male growing Blackbelly sheep with a bodyweight (BW) of 29 ± 3 kg were slaughtered. Data from carcase and non-carcase components were recorded. Thereafter, the left half carcase was weighed and dissected to record weights of fat (CF), muscle (CM), and bone (CB). Also, the 9th–11th section was dissected for muscle, fat and bone (MRib, FRib, BRib, respectively). The MRib and FRib were moderate to highly correlated (p  0.59 ≤ and ≤ 0.92). All equations had high accuracy (> 0.96), moderate to high reproducibility index and concordance (CCC > 0.74 and ≤ 0.96) and moderate to high efficiency of prediction (from 0.58 to 0.91). Overall, results showed that the 9th–11th rib section could accurately be used as an option for predicting carcase tissue composition in Blackbelly sheep.HIGHLIGHTS Muscle and fat from the 9th–11th rib section were moderate to highly correlated with carcase muscle weight. Fat from the 9th–11th rib section was positive and moderate correlated with carcase fat weight. The 9th–11th rib section could be used as an option for predicting carcase tissue composition in Blackbelly sheep