A note on the effect of docking on fat deposition in fat-tailed sheep

Joubert, D. M.; Ueckermann, L.

doi:10.1017/s0003356100029573

Cited by 11 publications

(4 citation statements)

References 1 publication

(1 reference statement)

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“…Slaughter weight, empty body weight and carcass weight (including the tail weight) at 50 weeks of age tended to be higher in docked than in the undocked lambs although the effect of docking was not statistically significant (P > 0-05). These results are in contrast with those of Epstein (1961), Asker et al (1964) and Joubert & Uckermann (1971) who reported that docking decreased carcass weight. The trend to higher dressing percentages in the docked than in the undocked animals are similar to the results of Qureshi (1968) and Juma et al (1974).…”

Section: Carcass Weight and Dressing Percentagecontrasting

confidence: 91%

Effect of docking and shearing on growth and carcass traits of fat-tailed Ossimi sheep

et al. 1987

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SummaryThirty Ossimi lambs were used in an experiment to compare those whose tail was docked shortly after birth with controls. After weaning at 4 months of age the groups were further subdivided and two of the four groups closely shorn according to a 2 × 2 factorial design.Male lambs at 20 kg were subjected to intensive finishing until the age of 50 weeks and nine were then slaughtered to determine carcass characteristics.There was a trend for increased live-weight gain in the docked lambs in the preweaning stage (up to 16 weeks).This trend was also present, although not statistically significant, in the final phase of intensive feeding from 20 kg weight to 50 weeks. Shearing significantly improved daily gain in this final period (P < 0·05). These increases in gain were also apparently associated with improvements in efficiency, as judged on a group basis.Docking and shearing also tended to cause increases in body measurements: height, chest girth and abdomen girth in the case of docking (P < 0·05) and chest girth, chest depth and abdomen girth in the case of shearing (P < 0–05).Carcass characteristics, measured on a relatively small sample, indicated several effects of docking and shearing on carcass traits although most of these were consistent with the expected differences stemming from the higher carcass weights acheived at 50 weeks of age by docked and sheared lambs.

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Section: Carcass Weight and Dressing Percentagecontrasting

confidence: 91%

Effect of docking and shearing on growth and carcass traits of fat-tailed Ossimi sheep

et al. 1987

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“…This is in close agreement with earlier work of O'Donovan et al (1973) on Kellakui fat-tailed sheep in Iran and Alkass et al (1985) on Awassi lambs in Iraq. Similarly, results of the present experiment showed that tail docking had no effect on postweaning performance of lambs given moderate to high levels of ME ( ≥ 0·743 MJ/kg M 0·75 per day), as in earlier work by Joubert and Ueckermann (1971), O'Donovan et al (1973) and Alkass et al (1985). However, previous work with Awassi lambs by Farhan et al (1969) showed that docking decreased daily gain, dressing percentage, the percentage of fat in the carcass and carcass weight as a proportion of empty body weight.…”

Section: Food Intake and Growth Of Lambssupporting

confidence: 89%

Effect of tail docking in Awassi lambs on metabolizable energy requirements and chemical composition of carcasses

et al. 2002

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The effect of tail docking on metabolizable energy requirements and carcass characteristics was studied using 80 weaned entire Awassi (between 0·74 and 1·1 MJ/ kg M 0·75 per day). Hot and cold carcass weights were similar ( P > 0·05) for the two groups. Differences in empty body weight and fleece-free empty body weight were significant ( P < 0·05) only for the 0·443 to 0·522 MJ/kg M 0·75 per day level of ME intake. Predicted ME requirements were higher for docked lambs for an estimated LWG between 0 and 100 g/day and lower for higher LWG (125 to 225 g/day). Docking had no effect ( P > 0·05) on food conversion efficiency (FCE). Carcasses from docked lambs had significantly lower ( P < 0·001) internal plus tail fat. Pooled soft tissue excluding tail fat, for the undocked lambs contained significantly more ( P < 0·01) protein, less ( P < 0·001) fat, higher ( P < 0·01) moisture and similar ( P > 0·05) ash content.

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“…In an experiment, male lambs born from Namaqua Afrikaner, Pedi, and Blackhead Persian ewes by Namaqua Africaner rams underwent tail docking or retention of their tails (Joubert and Ueckerman 1971). In addition to the generally employed C and J measurements taken, respectively, on the back and ribs, deposition of subcutaneous fat was measured with calipers across the shoulder, over the rump, and on the sternum.…”

Section: Dockingmentioning

confidence: 99%

A review of morphological characteristics relating to the production and reproduction of fat-tailed sheep breeds

Pourlis

2011

Trop Anim Health Prod

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The purpose of this study is to survey the literature pertinent to some morphological traits which are related with the production and reproduction of fat-tailed sheep breeds. The fat-tailed breeds were identified according to Food and Agriculture Organization databases. Articles referring to all these sheep breeds were evaluated. The morphology of udders and their measurable variables were collected and described. The particularities of pelt and fleece features which are important from an economic point of view were summarized. Linear, planar, and spatial parameters of body, slaughter, and carcass factors were compared at various ages of breeding. Testicular dimensions and semen characteristics were recorded. Their relationships with productive and reproductive performance were discussed. The pattern of ovarian follicle development and the involution of the genital tract were assessed from the anatomical point of view in normal and untreated animals. The data presented here provide useful baseline information on the normal morphological aspects which are important in the animal production of these breeds.

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A note on the effect of docking on fat deposition in fat-tailed sheep

Cited by 11 publications

References 1 publication

Effect of docking and shearing on growth and carcass traits of fat-tailed Ossimi sheep

Effect of docking and shearing on growth and carcass traits of fat-tailed Ossimi sheep

Effect of tail docking in Awassi lambs on metabolizable energy requirements and chemical composition of carcasses

A review of morphological characteristics relating to the production and reproduction of fat-tailed sheep breeds

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