Hormonal status, metabolic changes, and resting metabolic rate in beef heifers undergoing compensatory growth.

Yambayamba, E.S.K.; Price, M. A.; Foxcroft, G. R.

doi:10.2527/1996.74157x

Cited by 159 publications

(141 citation statements)

References 49 publications

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“…Growth acceleration may sometimes be associated with reduced metabolic costs during growth itself ( Yambayamba et al 1996;Bayne 2000), because one contribution to a faster rate of tissue growth is a reduction in (energetically expensive) protein turnover (McCarthy et al 1994;Samuels & Baracos 1995). In other situations, faster growing animals have greater rates of resting metabolism (McKenzie et al 2003), possibly due to an increased state of readiness to engage in those behaviours (e.g.…”

Section: Discussionmentioning

confidence: 99%

Early nutrition and phenotypic development: ‘catch-up’ growth leads to elevated metabolic rate in adulthood

et al. 2008

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Resting metabolic rate (RMR) is responsible for up to 50% of total energy expenditure, and so should be under strong selection pressure, yet it shows extensive intraspecific variation and a low heritability. Environmental conditions during growth are thought to have long-term effects through 'metabolic programming'. Here we investigate whether nutritional conditions early in life can alter RMR in adulthood, and whether this is due to growth acceleration or the change in diet quality that prompts it. We manipulated dietary protein levels during the main growth period of zebra finches (Taeniopygia guttata) such that an episode of poor nutrition occurred with and without growth acceleration. This produced different growth trajectories but a similar adult body mass. Only the diet that induced growth acceleration resulted in a significant (19%) elevation of RMR at adulthood, despite all the birds having been on the same diet after the first month. This is the first study to show that dietary-induced differences in growth trajectories can have a long-term effect on adult metabolic rate. It suggests that modification of metabolic efficiency may be one of the mechanisms mediating the observed long-term costs of accelerated growth, and indicates links between early nutrition and the metabolic syndrome.

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Section: Discussionmentioning

confidence: 99%

Early nutrition and phenotypic development: ‘catch-up’ growth leads to elevated metabolic rate in adulthood

et al. 2008

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“…During the two-week period of realimentation, lambs had improved ADG (Al-Selbood, 2009; Abouheif et al, 2013) and improved FG (Homem Junior et al, 2007;Shadnoush et al, 2011). This higher gain could not be attributed to DMI because intake values were not different between realimented (RR) and control groups, but possibly due to the better FG in realimented lambs and/or the decreased heat production during the restriction and its continuation during realimentation (Yambayamba et al, 1996). These results are in agreement with those of Mahouachi and Atti (2005), but not with those of Homem Junior et al (2007), who reported that rapid gain during realimentation was associated with increased feed intake.…”

Section: Discussionmentioning

confidence: 83%

“…Feeding restriction treatments did not have any effect on empty intestinal tissue weights, whereas it depressed the weights of empty stomach compartments. Several studies have showed decreases in the weights of empty stomach compartments due to restriction treatments (Mora et al, 1996;Yambayamba et al, 1996;Dashtizadeh et al, 2008). Similar results were reported by Hambly and Speakman (2005), who found that with less food entering the digestive system, the weight of the stomach tissue was significantly lower during the 20% dietary restriction than in control feeding without altering the ability to process the diet.…”

Section: Discussionmentioning

confidence: 99%

Effect of different feed restriction regimens on lamb performance and carcass traits

et al. 2015

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-Fifty Najdi ram lambs weighing an average of 38.1±0.5 kg were utilized in this study to determine the effects of feed restriction level with or without subsequent realimentation on lamb performance and carcass composition. Lambs were allotted randomly and equally into five groups. The groups were fed a control diet ad libitum; two groups fed 0.90 and 0.80 of ad libitum intake throughout the eight-week period of the trial (R), and two groups fed 0.90 and 0.80 of ad libitum intake for a six-week period followed by two weeks of realimentation (RR). All lambs were slaughtered after eight weeks of experimentation. Average daily gain (ADG) for the 0.90 and 0.80 ad libitum groups decreased by 7.6 and 26.9% during restriction, whereas the lambs during realimentation period had 35 and 30.5% faster ADG and 27.5 and 21.8% better feed:gain ratios than the control, respectively. At the end of the trial, final, empty and hot carcass weights and overall ADG of the 0.90 ad libitum RR group did not differ from control. Feeding performance values of the 0.80 ad libitum R group were the lowest among the treatments. The studied feed restriction regimens depressed the weights of empty stomach, tail fat, visceral fat, and subcutaneous fat; however, two weeks of realimentation were not enough to induce complete weight recovery in these tissues. The 0.90 ad libitum RR restriction routine can be adopted as a nutritional management practice for fattening Najdi lambs.

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“…There are reports of rapid increase in plasma concentrations of insulin (Yambayamba, Price & Foxcroft, 1996) and triiodothyronine (T3) (Nir, Nitsan, Dunnington & Siegel, 1996).…”

Section: Introductionmentioning

confidence: 99%

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et al. 2017

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This research was conducted to assess the compensatory gain in birds that have suffered severe food restriction and a reduced growth in its initial phase. A total of 144 birds were used in the Label Rouge lineage with average initial weight 239.90 ± 76.80 g, from 28 to 49 days. The experimental design used was a completely randomized design, where the birds were distributed in 18 boxes, containing 3 treatments and 6 replicates of 8 birds per cage. The treatments were as follows: birds with body weight of 150.73 ± 12.62 g, between weighing from 239.79 ± 13.14 g and heavy weight of 329.17 ± 24.89 g in different periods, from 28 to 35, 35 to 42 and 42 to 49 days of age, respectively. In relation to weight gain, the heavy birds, obtained better results when compared to the other. The feed consumption has changed in the three periods and, in the period of 42 to 49 days, the treatments did not differ among themselves. Feed conversion rates (p = 0.127) and feasibility (p = 0.6163) of birds do not differ in different periods.Keywords: Consumption, feed efficiency, poultry, severe restriction. ResumenEsta investigación se realizó para evaluar la ganancia compensatoria en aves que han sufrido graves restricciones alimenticias y un crecimiento reducido en su fase inicial. Se utilizó un total de 144 aves en el linaje Label Rouge con un peso inicial promedio de 239.90 ± 76.80 g, de 28 a 49 días. El diseño experimental utilizado fue el diseño completamente al azar, en el que las aves se distribuyeron en 18 cajas, con 3 tratamientos y 6 repeticiones de 8 aves por jaula. Los tratamientos fueron los siguientes: aves con peso corporal de 150.73 ± 12.62 g, entre el peso de 239.79 ± 13.14 g y peso de 329.17 ± 24.89 g en diferentes períodos, de 28 a 35, 35 a 42 y 42 a 49 días de edad, respectivamente. En relación al aumento de peso, las aves pesadas, obtuvieron mejores resultados en comparación con el otro. El consumo de alimento ha cambiado en los tres períodos y, en el período de 42 a 49 días, los tratamientos no difirieron entre sí. Los porcentajes de conversión alimenticia (p = 0.127) y de viabilidad (p = 0.6163) de las aves no difieren en diferentes períodos.Palabras clave: Consumo, eficiencia alimentaria, aves de corral, restricción severa.

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Hormonal status, metabolic changes, and resting metabolic rate in beef heifers undergoing compensatory growth.

Cited by 159 publications

References 49 publications

Early nutrition and phenotypic development: ‘catch-up’ growth leads to elevated metabolic rate in adulthood

Early nutrition and phenotypic development: ‘catch-up’ growth leads to elevated metabolic rate in adulthood

Effect of different feed restriction regimens on lamb performance and carcass traits

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