Análise de componentes principais da variação de peso da vaca durante a gestação na programação fetal de fêmeas

Rodrigues, Leonel da Silva; Moura, Amanda Farias de; Filho, Dari Celestino Alves; Brondani, Ivan Luiz; Klein, John Lenon; Adams, Sander Martinho; Cocco, Joziane Michelon; Pereira, Lucas Braido

doi:10.33448/rsd-v10i2.12077

Cited by 3 publications

(8 citation statements)

References 26 publications

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“…The cow weight gain during late pregnancy did not improve the Longissimus dorsi area (Figure 5), corroborating the findings of Rodrigues et al (24) . This result may be a consequence of environmental adaptation of cow calves after birth.…”

Section: Discussionsupporting

confidence: 90%

“…The results corroborate the theories described by Du et al (2) , who state that improving nutrition during the final stage of pregnancy favors the processes of myogenesis and adipogenesis of progeny, and consequently improves muscle mass and fat in the carcass. In a similar study, Rodrigues et al (24) obtained higher HCW in cows that gained up to 10 % of their body weight during pregnancy compared to cows that lost 0 to 10 % and 10 to 20% of weight during that period. The authors did not observe changes in SFT in that study.…”

Section: Discussionmentioning

confidence: 65%

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Efecto del peso y la puntuación de la condición corporal de vacas gestantes en las características de la canal de su progenie: Meta análisis

Adams

Klein

Machado

et al. 2022

Rev. Mex. Cienc. Pecu.

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The objective of the meta-analysis was to evaluate the effects of beef cows weight variation during the 2nd and / or 3rd trimester pregnancy on some parameters of the progeny carcass. The cow weight gain during this gestational period was calculated to standardize the treatments: moderate loss (ML= cows that lost 0 to 5 % of weight) and moderate gain (MG= cows that gained 0 to 5 % of weight). The effect size for all parameters was calculated as medium difference (MD) with a 95% confidence interval and heterogeneity determined using the Q test and the I2 statistic. A random effects meta-analysis was performed for each indicator separately as the medium control and experimental groups. The cow’s weight variation during the studied time variation did not influence the progeny carcass characteristics (P>0.05). Although, a trend towards greater hot carcass weight (P=0.15) and thickness of subcutaneous fat (P=0.10) was observed in calves from MG cows in relation to calves from ML cows. However, the meta-analysis demonstrated that small variations in cow weight during the final half of pregnancy do not affect progeny carcass characteristics.

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Section: Discussionsupporting

confidence: 90%

Section: Discussionmentioning

confidence: 65%

Efecto del peso y la puntuación de la condición corporal de vacas gestantes en las características de la canal de su progenie: Meta análisis

Adams

Klein

Machado

et al. 2022

Rev. Mex. Cienc. Pecu.

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“…The body weight loss in cows during late gestation is mainly related to nutritional imbalance on pasture-based systems. In addition, Rodrigues et al (2021) comment on the weight variations. Tsuneda et al (2017) indicate that nutrition is one of the main factors that alter the uterine environment during gestation, which can modify calf metabolism and physiology after birth.…”

Section: Resultsmentioning

confidence: 99%

“…However, calves from cows with severe weight loss in this gestational period (> 10%) were 11.06 kg lighter than those born from cows with moderate loss. However, we must addition, Rodrigues et al (2021) comment on the weight variations. Tsuneda et al (2017) indicate that nutrition is one of the main factors that alter the uterine environment during gestation, which can modify calf metabolism and physiology after birth.…”

Section: Resultsmentioning

confidence: 99%

“…One way to measure the nutritional balance of the pregnant cow is through weight variation since weight loss may indicate a restriction of nutrients to the maternal organism, compromising fetal growth. According to Rodrigues et al (2021), inadequate nutrition of pregnant cows may be caused by climatic conditions or a decline in the quality or quantity of available forage on pasture, impacting the weight of cows during gestation.…”

Section: Introductionmentioning

confidence: 99%

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Beef cow weight variations during gestation and offspring performance: a meta-analysis

Klein¹,

Machado²,

Adams³

et al. 2021

Semina: Ciênc. Agrár.

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The objective of this meta-analysis was to evaluate the effects of weight loss or weight gain of beef cows during the second and/or third trimester of gestation on the postnatal performance of the progeny. The variation in cow weight during the gestational period was calculated to standardize the treatments, being them: severe loss (SL = cows that lost more than 10% of weight); moderate loss (ML = cows that lost from 0 to 10% of weight) and weight gain (WG = cows that gained weight). The intensity of the cow weight variation effect was calculated as the mean difference (MD) with a 95% confidence interval and heterogeneity determined using the Q test and the I2 statistic. A meta-analysis of random effects was conducted for each indicator separately with the means of the control and experimental groups. Calves from WG cows were higher for birth weight (P = 0.0094); weight adjusted to 205 days (P = 0.0127) and average daily gain during pre-weaning (P < 0.0001) in relation to calves from ML cows. The W205 of calves from SL cows was 11.6 kg lower than the progeny from ML cows. The post-weaning performance of the progeny tended (P = 0.0868) to be higher in the progeny of WG cows than ML ones. The weight gain of beef cows during gestation improves the pre- and post-weaning performance of the progeny, with more evident effects in the early months of life of the offspring.

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Beef heifer weight loss during gestation and its effects on progeny performance

Klein

Adams²,

Filho³

et al. 2022

RSD

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The objective of the present study was to evaluate the intensity of weight loss in beef heifers during gestation and its effects on progeny performance up to 205 days of age. Sixty pregnant heifers aged 3 or 4 years, born between 2015 and 2017, from the rotational cross between Charolais and Nellore breeds were used. Females were divided according to the intensity of weight loss in the gestation period (7, 14, and 21%) and age at first calving (3 and 4 years), in a completely randomized design in a 3 x 2 factorial scheme. Lost up to 21% (T21) of body weight during gestation and had higher body conditions at the end of the breeding season (3.12 vs 3.02 and 3.04 points) and lower body weight at calving (341.96 vs 386.26 and 362.95 kg) about T7 and T14 heifers. The birth weight of the calves showed a tendency to increase as the weight loss of the pregnant heifers increased, with values of 29.46, 30.60 and 32.76 kg for treatments T7, T14 and T21, without reflections on the post-weaning performance of the progeny. In general, the loss of 14 or 21% of the heifer's body weight during pregnancy reduces the weight at the first calving, while heifers calved at 4 years of age are heavier and give rise to progeny with greater productive potential up to 205 days of age.

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Análise de componentes principais da variação de peso da vaca durante a gestação na programação fetal de fêmeas

Cited by 3 publications

References 26 publications

Efecto del peso y la puntuación de la condición corporal de vacas gestantes en las características de la canal de su progenie: Meta análisis

Efecto del peso y la puntuación de la condición corporal de vacas gestantes en las características de la canal de su progenie: Meta análisis

Beef cow weight variations during gestation and offspring performance: a meta-analysis

Beef heifer weight loss during gestation and its effects on progeny performance

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