Different periods of feed restriction before compensatory growth in Belgian Blue bulls: II. Plasma metabolites and hormones.

Hornick, Jean-Luc; Eenaeme, Christian Van; Diez, Marianne; Minet, Vincent; Istasse, Louis

doi:10.2527/1998.761260x

Cited by 65 publications

(67 citation statements)

References 53 publications

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“…Thereafter, concentrations remained quite constant and similar to those reported by other authors in growing animals in unrestricted energetic conditions (Ellenberger et al, 1989;Hornick et al, 1998).…”

Section: Discussionsupporting

confidence: 90%

“…In period 2, the serum IGF-I concentrations of LUC 1 Feedlot animals were similar to those of the Feedlot treatment after only 20 days on concentrates, reaching a peak at this moment and showing a plateau thereafter, in a pattern similar to other studies (Ellenberger et al, 1989;Hornick et al, 2000). In this study, serum IGF-I concentration and BW were closely correlated, as reported by Hornick et al (1998) and Blanco et al (2010b). However, the clear correlation between IGF-I concentrations and long-or short-term ADG observed in other studies was not evident here, as other authors had previously reported (Ronge and Blum, 1989;McKinnon et al, 1993).…”

Section: Discussionsupporting

confidence: 89%

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Grazing lucerne as fattening management for young bulls: technical and economic performance and diet authentication

Alibés

Joy

Ripoll

et al. 2011

Animal

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Three fattening systems were evaluated from weaning to slaughter in order to find alternatives to grain feeding in young bulls, and to test the reliability of carcass subcutaneous fat colour to discriminate among them. After weaning (224 kg), one group of animals was fed concentrates and straw until they reached the target slaughter weight (450 kg; Feedlot), another group grazed rotationally on lucerne supplemented with 1.8 kg DM/day barley until slaughter (LUC), and the third group had the same management as LUC animals for 3 months (period 1) and thereafter was finished on concentrates and straw until slaughter (period 2; LUC + Feedlot). Animals were weighed weekly and sampled monthly for serum IGF-I and leptin, and plasma non-esterified fatty acids and carotenoid pigment concentration analyses. Carcass characteristics and subcutaneous fat colour were recorded after slaughter. In period 1, Feedlot animals had slightly greater weight gains than their grazing counterparts (P< 0.10), and at the end of period 1 they had 66% greater IGF-I and 35% greater leptin concentration (P< 0.01). Plasma carotenoid pigments were undetectable in Feedlot animals, but increased during grazing in LUC and LUC + Feedlot treatments. In period 2, weight gains were lowest for LUC, intermediate for Feedlot and greatest for LUC + Feedlot animals (P< 0.001), conditioning the time taken to reach slaughter weight (73, 58 and 47 days, respectively;P< 0.05). Leptin and IGF-I concentrations increased in all management systems during period 2. Plasma carotenoid pigment concentration reached its maximum at the end of period 2 in LUC animals, but it decreased sharply in LUC + Feedlot animals in this period. Management did not affect carcass traits except for subcutaneous fat colour. Yellowness, Chroma (C*) and the value of the integral of the translated reflectance spectrum (SUM), estimator of carotenoid pigment content in fat, were higher in LUC than in LUC + Feedlot and Feedlot animals (P< 0.001). Two logistic regressions were obtained to discriminate carcasses from LUC treatment: P (LUC) = (1 + e18.8–5.6 × lightness–36.9 × redness + 0.3 × SUM + 29.8 × C*)−1and LUC + Feedlot treatment: P (LUC + Feedlot)=(1 + e833.7–11.8 × lightness + 4.7 × redness + 0.2 × SUM−2.5 × C*)−1. The economic margin, calculated as income achieved minus costs, was greatest for LUC, intermediate for LUC + Feedlot and lowest for Feedlot treatment. Therefore, grazing lucerne supplemented with barley was an interesting alternative for fattening young bulls in these conditions, producing carcasses of similar quality, which could be accurately traced by measuring subcutaneous fat colour.

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Section: Discussionsupporting

confidence: 90%

Section: Discussionsupporting

confidence: 89%

Grazing lucerne as fattening management for young bulls: technical and economic performance and diet authentication

Alibés

Joy

Ripoll

et al. 2011

Animal

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“…Growth rate was greater during the first four weeks of the re-alimentation period than during the following 13 weeks for animals in the restricted group (Figure 2). Several studies have shown a similar pattern, and this was attributed to differences in the ratio of protein : fat deposition during initial vs. subsequent weight gain (Wright & Russel, 1991;Sainz et al, 1995;Hornick et al, 1998), and to differences in the efficiency of energy and protein utilization (Fox et al, 1972). Growth and development of various organs is affected by feed restriction and subsequent re-feeding (e.g.…”

Section: Discussionmentioning

confidence: 88%

“…In particular, experiments where different planes of nutrition have been applied have given conflicting results in terms of animal performance, endocrine status and feed intake. Intake (Hornick et al, 1998), nutrient requirements (Sainz et al, 1995), composition of gain, energy utilization (Carstens et al, 1991), endocrine status (Yambayamba et al, 1996), diet digestibility (Murphy & Loerch, 1994) and nutrient partitioning (Kamalzadeh et al, 1998) may all be changed by feed restriction, and contribute to compensatory growth effects in ruminants. In this experiment, the restricted group had a lower growth rate than the control group during the first 13 weeks (restriction period).…”

Section: Discussionmentioning

confidence: 99%

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The roles of the insulin-like growth factor system and leptin as possible mediators of the effects of nutritional restriction on age at puberty and compensatory growth in dairy heifers

Luna-Pinto¹,

Cronje²

2000

SA J. An. Sci.

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The aim of this experiment was to determine to what extent changes in the blood concentrations of insulinlike growth factor-1 (IGF-1), IGF binding proteins (IGFBPs), leptin and glucose are associated with compensatory growth and age at puberty in Friesian heifers. Twelve heifers (6 months old; 179.8 kg body weight) were allocated to one of two dietary treatments for 30 weeks. Treatments were designed to result in two different growth rates during the first 13 weeks of the experiment, viz. 0.3 kg/d (restriction treatment) or 0.6 kg/d (control treatment). From week 14 to 30, the restricted group received the same amount of feed per kg bodyweight as was fed to the control group (compensatory phase). Heifers in the control treatment reached puberty four weeks earlier than the restricted group. Mean body weight at puberty was 256.3 kg and was not affected by treatment. During the compensatory phase, the growth rate of the previously restricted animals was greater, and feed conversion ratio superior, compared to that of the control group. Plasma IGF-1 and IGFBP-3 concentrations were higher in the restricted group than in the control group during the early compensatory phase. Concentrations of IGFBP-3 increased and peaked at puberty for both treatments, even though puberty occurred at different ages. In contrast, concentrations of IGF-1 peaked at the point of maximum growth rate in the previously restricted animals, and in neither treatment was there a clear relationship with the age of puberty. Plasma leptin concentrations increased until puberty in both treatments even though the date of puberty differed. Plasma glucose concentration did not change at puberty for either treatment; however, differences between treatments were found after the restriction period. There were no differences in IGFBP-2 concentrations between treatments or sampling periods. It is concluded that concentrations of glucose, IGF-1 and IGFBP-3 are affected by nutritional restriction and repletion, and may contribute in some measure to the endocrine regulation of compensatory growth. It is suggested that the increased concentrations of leptin and IGFBP-3 during pubertal development may act as physiological signals for the onset of puberty.

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Comparing the responses of grain fed feedlot cattle under moderate heat load and during subsequent recovery with those of feed restricted thermoneutral counterparts: plasma biochemistry

et al. 2022

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Different periods of feed restriction before compensatory growth in Belgian Blue bulls: II. Plasma metabolites and hormones.

Cited by 65 publications

References 53 publications

Grazing lucerne as fattening management for young bulls: technical and economic performance and diet authentication

Grazing lucerne as fattening management for young bulls: technical and economic performance and diet authentication

The roles of the insulin-like growth factor system and leptin as possible mediators of the effects of nutritional restriction on age at puberty and compensatory growth in dairy heifers

Comparing the responses of grain fed feedlot cattle under moderate heat load and during subsequent recovery with those of feed restricted thermoneutral counterparts: plasma biochemistry

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