Body composition and net energy requirements for Santa Ines lambs

Filho, José Gilson Louzada Regadas; Pereira, Elzânia Sales; Pimentel, Patrícia Guimarães; Villarroel, Arturo Bernardo Selaive; Medeiros, A. N.; Fontenele, Rildson Melo

doi:10.1016/j.smallrumres.2012.07.011

Cited by 31 publications

(30 citation statements)

References 13 publications

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“…A recent study carried by our team using the Brazilian sheep breed Santa Ines (Regadas Filho et al, 2013) and Morada Nova (Costa et al, 2013) confirmed the energy recommendations of the Institute National de la Recherché Agronomique (INRA, 1989), the Agricultural and Food Research Council (AFRC, 1993), and the Commonwealth Scientific and Industrial Research Organization (CSIRO, 2007).…”

Section: Introductionsupporting

confidence: 70%

“…Overall HP is considered as the increase in heat production after feed intake by an animal at a thermoneutral temperature. Our studies with hair sheep (Regadas Filho et al, 2013;Costa et al, 2011) put in evidence as the heat of fermentation and the energy spent in the digestive processes, as well as the heat produced as nutrient metabolism, contribute to HP. Feed quality and quantity can influence the activity pattern and thereby alter HP and NEm requirement.…”

Section: Resultsmentioning

confidence: 62%

“…We believe that reduction of this slaughter weight could increase the sheep's economic efficiency. Furthermore, a reduced slaughter weight may provide better heat dissipation due to the greater surface area (Silanikove, 2000), as these animals are subjected to conditions of heat stress (Regadas Filho et al, 2013). The NE stored per kg of live weight gain varies with the age and sex of the animal and with the rate of gain because the proportion of fat, protein and water in the gain varies.…”

Section: Resultsmentioning

confidence: 99%

“…We used ordinary least-squares regression to obtain equations of the form Y=a+bX+log EBW for the logarithms of body fat (g), protein (g) and energy content (MJ) versus the logarithm of empty body weight (kg). Then, we derived equations of the form proposed by Regadas Filho et al (2013), i.e., Y'=b×10 a ×EBW (b−1) , where Y'=net energy (MJ/kg EBW gain) or protein (g/kg EBW gain) requirement (MJ/kg EBW gain) or fat content (g/kg EBW gain), EBW=empty body weight (kg), a=the intercept and b=the regression coefficient.…”

Section: Data Calculationmentioning

confidence: 99%

“…However, energy and nutrient requirements are based on wool sheep data (Regadas Filho et al, 2013). Researchers from academic and research institutions located in regions of semi-arid climate hypothesize that nutritional requirements of hair sheep may be different from those established in international systems of feed evaluation and requirements for small ruminants.…”

Section: Introductionmentioning

confidence: 99%

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Body Composition and Net Energy Requirements of Brazilian Somali Lambs

Pereira

Fontenele

Silva

et al. 2014

Italian Journal of Animal Science

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The aim of this study was to determine the energy requirements for maintenance (NEm) and growth of 48 Brazilian Somali ram lambs with an average initial body weight of 13.47±1.76 kg. Eight animals were slaughtered at the trials beginning as a reference group to estimate the initial empty body weight (EBW) and body composition. The remaining animals were assigned to a randomised block design with eight replications per block and five diets with increasing metabolisable energy content (4.93, 8.65, 9.41, 10.12 and 11.24 MJ/kg dry matter). The logarithm of heat production was regressed against metabolisable energy intake (MEI), and the NEm (kJ/kg 0.75 EBW/day) were estimated by extrapolation, when MEI was set at zero. The NEm was 239.77 kJ/kg 0.75 EBW/day. The animal's energy and EBW fat contents increased from 11.20 MJ/kg and 208.54 g/kg to 13.54 MJ/kg and 274.95 g/kg of EBW, respectively, as the BW increased from 13 to 28.70 kg. The net energy requirements for EBW gain increased from 13.79 to 16.72 MJ/kg EBW gain for body weights of 13 and 28.70 kg. Our study indicated the net energy requirements for maintenance in Brazilian Somali lambs were similar to the values

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Section: Introductionsupporting

confidence: 70%

Section: Resultsmentioning

confidence: 62%

Section: Resultsmentioning

confidence: 99%

Section: Data Calculationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Body Composition and Net Energy Requirements of Brazilian Somali Lambs

Pereira

Fontenele

Silva

et al. 2014

Italian Journal of Animal Science

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Energy and protein requirements of non-descript breed hair lambs of different sex classes in the semiarid region of Brazil

Rodrigues

Chizzotti

Martins

et al. 2015

Trop Anim Health Prod

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The aim of this study was to determine the energy and protein requirements of non-descript breed hair lambs (NDB) reared under Brazilian semiarid conditions. Sixty animals from three sex classes (20 intact males, 20 castrated males, and 20 females) with an average initial body weight of 18.1 ± 0.4 kg and an average age of 5 months were used. The nutritional requirements were estimated using the comparative slaughter. The animals in the final slaughter group were distributed in a completely randomized design with a 3 × 3 factorial scheme (three sex classes and three feeding levels: ad libitum feeding (positive energy balance), 70% feed restriction (maintenance level), and 80% feed restriction (negative energy balance)). The net energy requirement for maintenance (NEm) did not differ between sex classes (P > 0.05) and it was 68 kcal/kg of metabolic empty body weight (EBW(0.75))/day (P < 0.05). The coefficients for the nonlinear regression of retained energy (RE) on the empty body weight gain (EBWG) were not different among the different sex classes (P > 0.05). The net energy requirement for weight gain (NEg) was estimated by NEg (Mcal/day) = 0.29 × EBW(0.75) × EBWG(0.86) for all sex classes (P < 0.05). The net protein requirement for weight gain (NPg) was estimated by NPg (g/day) = 224.45 × EBWG - 0.025 × RE for all sex classes (P < 0.05). The NEg increased and the NPg decreased with the increase in body weight of NDB lambs.

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Body composition and energy and protein nutritional requirements for weight gain in Santa Ines crossbred sheep

Cutrim

Alves

Santos

et al. 2016

Trop Anim Health Prod

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This study was conducted to evaluate the body composition and net energy and protein requirements for weight gain in Santa Ines crossbred sheep. Thirty woolless, 4-month-old, castrated male sheep with an initial body weight (BW) of 19.77 ± 1.99 kg were used. Six animals (reference group) were slaughtered after the adaptation period to estimate empty body weight (EBW) and initial body composition. The remaining 24 animals were randomly distributed among four treatments (experimental diets) and slaughtered when they reached 30.24 ± 0.78 kg BW. The body composition ranged from 162.88 to 160.4 g protein/kg EBW, from 59.49 to 164.23 g fat/kg EBW and from 1.54 to 2.46 Mcal energy/kg EBW for animals ranging between 20 and 30 kg BW. The net energy requirement for Santa Ines crossbred sheep linearly increased when BW increased from 20 to 30 kg. Within that same weight range, the net protein requirement for weight gain in sheep was constant, ranging from 12.61 to 12.42 g/day to 100 g daily weight gain.

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Body composition and net energy requirements for Santa Ines lambs

Cited by 31 publications

References 13 publications

Body Composition and Net Energy Requirements of Brazilian Somali Lambs

Body Composition and Net Energy Requirements of Brazilian Somali Lambs

Energy and protein requirements of non-descript breed hair lambs of different sex classes in the semiarid region of Brazil

Body composition and energy and protein nutritional requirements for weight gain in Santa Ines crossbred sheep

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