Lipogenic activity in Rasa Aragonesa ewes of different body condition score

Arana, A.; Mendizábal, J. A.; Delfa, R.; Eguinoa, P.; Soret, B.; Alzon, M.; Purroy, A.

doi:10.4141/a04-020

Cited by 6 publications

(8 citation statements)

References 12 publications

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“…As the feeding level increased, the IF depots augmented with regard to the TBF, the omental and pelvic being those which showed the largest changes (Table 1); which suggest that the most labile depots are the omental and pelvic ones (Arana et al 2005 were minimal, whereas omental, pelvic, and subcutaneous fat markedly increased with feeding level. Bocquier and Chilliard (1994), working with Lacaune ewes, found that omental fat was reduced when sheep received different feeding levels.…”

Section: Fat Deposition and Distributionmentioning

confidence: 91%

“…In the present study, the higher slope for IF compared with CF of the regression equation relative to TBF, EBW, and BCS suggests that the pattern of fat deposition favor the internal depots. On the other hand, the higher slope for the pelvic fat depot of the regression equation relative to TFB (1.40), EBW (4.02), and BCS (2.36) suggests that the pelvic fat depot has a greater ability to accumulate and mobilize fat and the lower slopes for omental and mesenteric fat indicate that these depots have less ability in comparison to pelvic fat to accumulate and mobilize fat (Arana et al 2005). In this sense, Arana et al (2005) in Aragonesa ewes (meat breed) found an increase in the amount of fat of the different fat depots as BCS was increased.…”

Section: Prediction Of Body Fat Depotsmentioning

confidence: 92%

“…On the other hand, the higher slope for the pelvic fat depot of the regression equation relative to TFB (1.40), EBW (4.02), and BCS (2.36) suggests that the pelvic fat depot has a greater ability to accumulate and mobilize fat and the lower slopes for omental and mesenteric fat indicate that these depots have less ability in comparison to pelvic fat to accumulate and mobilize fat (Arana et al 2005). In this sense, Arana et al (2005) in Aragonesa ewes (meat breed) found an increase in the amount of fat of the different fat depots as BCS was increased. They noticed that the subcutaneous depot had a higher slope (b=1.92) followed by perirenal, omental, mesenteric, and intermuscular fat depots.…”

Section: Prediction Of Body Fat Depotsmentioning

confidence: 92%

“…where: Y is the weight of each body fat depot; X is the weight of TBF, EBW, or BCS; a is the value of Y when X=1; and b is the relative growth coefficient describing proportionate growth of the body fat depot relative to TBF, EBW, or BCS (Nugussie et al 2003;Arana et al 2005). The relationships were investigated by regression models using PROC REG (SAS 2002).…”

Section: Statistical Analysesmentioning

confidence: 99%

“…In addition, the allometric growth equations of Huxley (1932) were used on carcass dissection data to assess the differential growth of body fat depots relative to total body fat (TBF) and EBW, as described by Nugussie et al (2003), and BCS, as described by Arana et al (2005). Using the following equation:…”

Section: Statistical Analysesmentioning

confidence: 99%

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The effects of metabolizable energy intake on body fat depots of adult Pelibuey ewes fed roughage diets under tropical conditions

Chay-Canul

Ayala-Burgos

Kú-Vera

et al. 2011

Trop Anim Health Prod

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The objective of this work was to evaluate the effect of metabolizable energy intake (MEI) on changes in fat depots of adult Pelibuey ewes fed roughage diets under tropical conditions. Eighteen 3-year-old Pelibuey ewes with similar body weight (BW) of 37.6 ± 4.0 kg and body condition score (BCS) of 2.5 ± 0.20 were randomly assigned to three groups of six ewes each in a completely randomized design. Ewes were housed in metabolic crates and fed three levels of MEI: low (L), medium (M), and high (H) for 65 days to achieve different BW and BCS. At the end of the experiment, the ewes were slaughtered. Data recorded at slaughter were: weights of viscera and carcass. Internal fat (IF, internal adipose tissue) was dissected, weighed, and grouped as pelvic (around kidneys and pelvic region), omental, and mesenteric regions. Carcass was split at the dorsal midline in two equal halves, weighed, and chilled at 6°C during 24 h. After refrigeration, the left half of the carcass was completely dissected into subcutaneous and intermuscular fat (carcass fat). Dissected carcass fat (CF) of the left carcass was adjusted as whole carcass. At low levels of MEI, proportion of IF and CF was approximately 50%; however, as the MEI was increased, the proportion of IF was increased up to 57% and 60% for M and H, respectively. Omental and pelvic fat depots were those which increased in a larger proportion with respect to the mesenteric fat depot. Regression equations between the weight of each body fat depot and BW had a coefficient of determination (r (2)) that ranged between 0.37 for mesenteric fat and 0.87 for CF. The regression with BCS had a r (2) that ranged between 0.57 for mesenteric and 0.71 for TBF. BW was the best predictor for TBF, CF, omental fat, and pelvic fat; whereas, BCS was better than BW in predicting IF and mesenteric fat. Inclusion of both BW and BCS in multiple regressions improved the prediction for all fat depots, except for pelvic fat, which was best estimated by BCS alone. The greater slope of the regression for the pelvic fat depot equation, relative to TBF (1.40), EBW (4.02), and BCS (2.36), suggested that pelvic fat has a greater capacity to accumulate and mobilize fat. These results indicated that adult Pelibuey ewes seem to store a considerable proportion of absorbed energy in the IF depots rather than in the carcass.

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Section: Fat Deposition and Distributionmentioning

confidence: 91%

Section: Prediction Of Body Fat Depotsmentioning

confidence: 92%