Performance of the Santa Ines breed raised on pasture in semiarid tropical regions and factors that explain trait variation

Jucá, Adriana de Farias; Faveri, Juliana Cantos; Filho, Geraldo Magalhães Melo; Filho, Antônio de Lisboa Ribeiro; Azevedo, H. C.; Muniz, E. N.; Pinto, L. F. B.

doi:10.1007/s11250-014-0635-0

Cited by 12 publications

(5 citation statements)

References 27 publications

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“…Santa Inês is the result of the intercurrent crossing in the northeast of Brazil between the genetic groups Bergamácia, Morada Nova, Rabo Largo, Somális, and other sheep without a defined racial pattern; it stands out for its productivity and rusticity, being biologically considered a new genetic material [18]. Male lambs of the Santa Inês breed show efficient growth parameters from 150 (extensive systems) to 250 (intensive systemsfeedlot) grams/day approximately [19,20]. In an intensive system, male Texel x Santa Inês crossbreed lambs showed a 65% difference in slaughter age (159 days-pasture vs. 263 days-feedlot) and 116% in average daily gain (0.133 g-pasture vs. 0.288 g-feedlot) [21].…”

Section: Introductionmentioning

confidence: 99%

Effect of Feeding Frequency on Intake, Digestibility, Ingestive Behavior, Performance, Carcass Characteristics, and Meat Quality of Male Feedlot Lambs

et al. 2021

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The study was conducted to evaluate the effects of feeding frequencies (one, two, three, and four times per day) on the performance of male feedlot lambs. Forty Santa Inês male lambs were used with an average age of 120 days approximately and initial body weight of 24.90 ± 1.8 kg (mean ± S.D.). The lambs were distributed to treatment groups in a completely randomized experimental design, with 10 animals per treatment, placed in individual pens. A standard diet consisted of Tifton-85 hay and concentrate with a ratio of 60:40, respectively. The different feeding frequencies did not influence (p > 0.05) the intake of nutritional components, blood parameters, weight gain, ingestive behavior, carcass characteristics, or meat quality of male feedlot lambs. The feeding frequency of 3 and 4 times per day promoted the highest digestibility of neutral detergent fiber (NDF; p = 0.008) and total digestible nutrients (TDN; p = 0.002). The feeding frequency of 3 times per day promoted the highest digestibility of crude protein (CP; p = 0.005). The time devoted to rumination (min/kg DM) was increased (p = 0.029) when the diet was supplied once a day compared to the other feeding frequencies. Based on these results, the recommended feeding frequency for male feedlot lambs is once a day. When feeding at this frequency, the ingestive behavior, productivity, carcass characteristics, and meat quality of male feedlot lambs will not be compromised.

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Section: Introductionmentioning

confidence: 99%

Effect of Feeding Frequency on Intake, Digestibility, Ingestive Behavior, Performance, Carcass Characteristics, and Meat Quality of Male Feedlot Lambs

et al. 2021

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“…However, they were similar to the 17.7 kg described by Catto et al [ 22 ] in animals also weaned at 90 days with concentrate supplementation on Brachiaria grass pastures. In contrast to these findings, Farias Jucá et al [ 23 ] reported no significant differences in weaning weight based on birth type, but their study involved weaning at 112 days. This suggests that animals from twin births may exhibit compensatory gains when weaned at a later age.…”

Section: Discussionmentioning

confidence: 85%

Weight Development and Growth Curves of Grazing Santa Inês Sheep Supplemented with Concentrate in the Pre-Weaning Phase

da Silva,

Ribeiro,

Silva

et al. 2024

Animals

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Monitoring weight development is essential for decision-making and assessing the effectiveness of management strategies. However, this practice is often hindered by the lack of scales on farms. This study aimed to characterize the weight development and growth curves of male and female Santa Inês lambs from birth to weaning, managed on pasture with creep-fed concentrate supplementation. Data from 212 lambs during the pre-weaning phase were analyzed. The animals were weighed every seven days to evaluate total weight gain and average daily gain. Biometric measurements were taken every 28 days. Mixed models were used to assess the effects of sex and birth type on birth and weaning weights. Simple and multiple linear regression models were employed to estimate live weight using biometric measurements. The non-linear Gompertz model was utilized to describe weight development and formulate growth curves. Results were considered significant at p < 0.05. An interaction effect between birth type and sex (p < 0.05) was noted for birth weight, with the lowest weight observed in twin-birth females (2.96 kg) and the highest in single-birth males (3.73 kg) and females (3.65 kg) (p > 0.05). Birth type significantly influenced average daily gain, total weight gain, and weaning weight (p < 0.05). The Gompertz model accurately depicted the growth curves, effectively describing the weight development. Pearson’s correlation coefficients between biometric measurements and weight were positive and significant (p < 0.05), ranging from 0.599 for hip height to 0.847 for heart girth. Consequently, the simple and multiple regression equations demonstrated high precision in predicting weaning weight. In conclusion, twin-birth lambs receiving concentrate supplementation via creep-feeding and managed on pasture showed different developmental patterns compared to single-birth lambs under the same conditions. The Gompertz model proved effective for monitoring development during the pre-weaning phase. All simple and multiple linear regression models were effective in predicting weaning weight through biometric measurements. However, for practical application, the model incorporating two measurements—body length and abdominal circumference—is recommended.

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“…The results of ultrasound measurements were lower than those found in the literature and can be considered low for the species. Jucá et al (2014) reported an average rib eye area of 6.45 cm 2 in Santa Ines sheep at 240 days, while Cartaxo et al (2009) evaluated the rib eye area of Santa Ines lambs and found averages of 20.4 kg and 7.53 cm 2 . However, in these studies the animals received supplemented diets, which increases the amount of protein and energy offered.…”

Section: Discussionmentioning

confidence: 99%

Estimated correlations of ultrasound carcass measurements and physical-chemical components of Santa Ines sheep meat

Geraldo

Júnior

Costa

et al. 2023

Acta Sci. Anim. Sci.

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The evaluation of the carcass composition of livestock generates relevant information on the quality and final yield of the meat products. The objective of this work was to evaluate correlations the ultrasound measurements in vivo of the Longissimus lumborum with the physical-chemical components of one-year-old Santa Ines sheep bred in extensive systems. The ultrasound evaluation was performed of the rib eye area (USrea), loin depth (USld), loin width (USlw) and subcutaneous fat thickness (USsft). After slaughter, meat cuts were weighed and carcass yield was calculated. The 12th rib on the left side was separated from the carcass and dissected, after which individual bones, muscles and fat were separated and weighed. The components were regrouped, ground and collected for centesimal evaluation. Significant positive correlations (p < 0.05) were found between the ultrasound measurements and meat metrics, except for the loin length, which had low correlation. Significant correlations (p < 0.05) were found between muscles and the measurements of USld, USrea and USsft. The correlations (p < 0.05) between the bones and USld and USrea were negative and significant. USsft presented correlation (p < 0.05) with carcass yield. Thus, the ultrasound measurements associated with the Longissimus lumborum could constitute a valuable tool for evaluating the physical-chemical components and carcass of one-year-old Santa Inês sheep created in extensive systems.

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Performance of the Santa Ines breed raised on pasture in semiarid tropical regions and factors that explain trait variation

Cited by 12 publications

References 27 publications

Effect of Feeding Frequency on Intake, Digestibility, Ingestive Behavior, Performance, Carcass Characteristics, and Meat Quality of Male Feedlot Lambs

Effect of Feeding Frequency on Intake, Digestibility, Ingestive Behavior, Performance, Carcass Characteristics, and Meat Quality of Male Feedlot Lambs

Weight Development and Growth Curves of Grazing Santa Inês Sheep Supplemented with Concentrate in the Pre-Weaning Phase

Estimated correlations of ultrasound carcass measurements and physical-chemical components of Santa Ines sheep meat

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