The effect of castration and ewe proximity on the behaviour, growth, carcass composition and meat quality of male lambs reared outdoors

The effect of castration and ewe proximity on the behaviour, performance and meat quality of housed male lambs

Proceedings of the British Society of Animal Science ◽

10.1017/s0308229600028221 ◽

1995 ◽

Vol 1995 ◽

pp. 54-54

Author(s):

J. M. L. Anderson ◽

G. M. Webster

Keyword(s):

Growth Performance ◽

Meat Quality ◽

Sexual Behaviour ◽

Carcass Composition ◽

Agonistic Behaviour ◽

Endocrine Status ◽

Sheep Production ◽

Male Sheep

This trial sought to increase the knowledge of the changes in the endocrine status of male sheep as they mature and to link this with their sexual and agonistic behaviour when reared in the presence or absence of females; the influence of female lambs could significantly alter the behaviour, growth, performance, carcass composition and meat quality of entire and castrated male lambs. Therefore, this project could lead to improvements in the efficiency of sheep production by providing the background physiology necessary to understand sexual behaviour. This may lead to improved practices for the management of growing sheep, which may reduce the necessity to routinely castrate all male lambs.

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The effect of castration and ewe proximity on the behaviour, performance and meat quality of housed male lambs

Proceedings of the British Society of Animal Science ◽

10.1017/s1752756200590516 ◽

1995 ◽

Vol 1995 ◽

pp. 54-54

Author(s):

J. M. L. Anderson ◽

G. M. Webster

Keyword(s):

Growth Performance ◽

Meat Quality ◽

Sexual Behaviour ◽

Carcass Composition ◽

Agonistic Behaviour ◽

Endocrine Status ◽

Sheep Production ◽

Male Sheep

This trial sought to increase the knowledge of the changes in the endocrine status of male sheep as they mature and to link this with their sexual and agonistic behaviour when reared in the presence or absence of females; the influence of female lambs could significantly alter the behaviour, growth, performance, carcass composition and meat quality of entire and castrated male lambs. Therefore, this project could lead to improvements in the efficiency of sheep production by providing the background physiology necessary to understand sexual behaviour. This may lead to improved practices for the management of growing sheep, which may reduce the necessity to routinely castrate all male lambs.

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Slaughter Characteristics of Feedlot-Finished Premium South African Lamb: Effects of Sex and Breed Type

Foods ◽

10.3390/foods9050648 ◽

2020 ◽

Vol 9 (5) ◽

pp. 648 ◽

Cited By ~ 3

Author(s):

Daniël André Van der Merwe ◽

Tertius Swanepoel Brand ◽

Louwrens Christiaan Hoffman

Keyword(s):

South African ◽

Meat Quality ◽

Crude Protein ◽

Live Weight ◽

Carcass Composition ◽

Frame Size ◽

Dual Purpose ◽

Ewe Lambs ◽

Early Maturing

This study compared the carcass characteristics of ram and ewe lambs from South African wool, dual-purpose, meat, and fat-tailed sheep types, reared to produce premium lamb carcasses. The lambs were reared on a feedlot diet (10.41 MJ ME/kg feed and 19.06% crude protein) from weaning (30 kg live weight) until they attained a back-fat depth of ~4 mm, measured using ultrasound. After slaughter, the carcasses were assessed for retail cut yields, composition, and physical meat quality. Later, maturing lambs attained heavier carcass weights than early maturing breeds (~20.7 kg vs. 16.9 kg, respectively; p ≤ 0.05), and differences in carcass composition and retail cut yields were ascribed to differences in the frame size and pattern of fat deposition of the respective breeds. Small differences in physical meat quality were observed, with meat from Dormer and Namaqua lambs having notably higher shear-force values (~46 N) than that from Meatmaster carcasses (~34 N). These differences though are expected to have little influence on the perceived quality of the meat.

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Carcass Composition, Meat Quality and Sensory Quality of Gentile di Puglia Light Lambs: Effects of Dietary Supplementation with Oregano and Linseed

Animals ◽

10.3390/ani11030607 ◽

2021 ◽

Vol 11 (3) ◽

pp. 607

Author(s):

Giuseppe Scarpa ◽

Simona Tarricone ◽

Marco Ragni

Keyword(s):

Meat Quality ◽

Control Diet ◽

Saturated Fatty Acids ◽

Total Content ◽

Carcass Composition ◽

Origanum Vulgare ◽

Growth Performances ◽

Longissimus Lumborum ◽

Dietary Treatments

There is a growing demand by the modern consumer for meat containing less fat and lower levels of saturated fatty acids, which are considered to increase the risk of coronary heart disease. In southern Italy, the Gentile di Puglia breed is one of the most common on farms, and the light lambs are often consumed. The study evaluates the effect of a diet containing extruded linseed (Linum usitatissimum) on growth performances, carcass traits, and meat quality in Gentile di Puglia light lambs. Thirty-six male lambs are weaned at about 20 days of age, and divided into three groups—each group is either fed a control diet (C), a diet containing 3% extruded linseed (L), or a diet containing 3% extruded linseed and 0.6% oregano (Origanum vulgare) (L + O). The lambs’ growth performances and the slaughtering and dissection data did not differ between groups. Dietary treatments have no significant effect on the quality and chemical composition of Longissimus lumborum (Ll). The mount of linoleic acid in Ll meat is significantly higher in the L group, and this positively affected the total content of n-3 Polyunsaturated Fatty Acid, as well as the n-6/n-3 ratio. The good results obtained concerning the sensory traits meet the requirements of the market’s consumer.

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Carcass composition and meat quality of kids fed sunflower oil supplemented diet

Small Ruminant Research ◽

10.1016/s0921-4488(01)00245-0 ◽

2001 ◽

Vol 42 (3) ◽

pp. 217-225 ◽

Cited By ~ 37

Author(s):

P Marinova ◽

V Banskalieva ◽

S Alexandrov ◽

V Tzvetkova ◽

H Stanchev

Keyword(s):

Meat Quality ◽

Sunflower Oil ◽

Carcass Composition

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An evaluation of beef carcass quality 1. The influence of cereal feeding on the growth and carcass quality of Friesian steers

Animal Science ◽

10.1017/s0003356100011478 ◽

1972 ◽

Vol 15 (3) ◽

pp. 215-227 ◽

Cited By ~ 3

Author(s):

C. E. Hinks ◽

J. H. D. Prescott

Keyword(s):

Meat Quality ◽

Live Weight ◽

Carcass Composition ◽

Factorial Experiment ◽

Carcass Quality ◽

Grazing Cattle ◽

Weight Gains ◽

Second Period ◽

Tasting Panel

SUMMARYTwenty-four Friesian steers, initially 5 months of age, were involved in a 2 × 2 factorial experiment which spanned grazing and silage feeding periods of 22 weeks' duration. In the first period, cattle were stocked at a uniformly high density, with half of the group being fed 1·25 kg/head per day of supplementary barley. In the second period, the cattle were subdivided into four groups and fed varying levels of barley with silage. Finally all the animals received 3·65 kg/head per day of barley. Replicates of the four treatments were slaughtered at random after 5 to 11 weeks on this treatment. Whilst supplementary cereal feeding significantly increased the live-weight gains of steers at grass by 11%, this live-weight advantage was offset by their slower gains in the final weeks before slaughter. Feeding cereals to grazing cattle had little effect on carcass composition or the proportions of carcass joints, but their beef was considered, by a tasting panel, to be more tender than the meat from the control steers.Increasing the level of barley fed with silage only increased live-weight gains by 2%, and had little effect on carcass or meat quality.

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The effect of carcass weight and sex on carcass composition and meat quality of “Cordeiro Mirandês”—Protected designation of origin lambs

Small Ruminant Research ◽

10.1016/j.smallrumres.2015.07.008 ◽

2015 ◽

Vol 130 ◽

pp. 136-140 ◽

Cited By ~ 9

Author(s):

V.A.C. Santos ◽

A. Cabo ◽

P. Raposo ◽

J.A. Silva ◽

J.M.T. Azevedo ◽

...

Keyword(s):

Meat Quality ◽

Carcass Composition ◽

Carcass Weight ◽

Protected Designation Of Origin

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An evaluation of beef carcass quality 2. Influence of variation in grazing intensity and the level of barley supplementation with silage on the carcass and meat quality of Friesian steers

Animal Science ◽

10.1017/s000335610001148x ◽

1972 ◽

Vol 15 (3) ◽

pp. 229-237

Author(s):

C. E. Hinks ◽

J. H. D. Prescott

Keyword(s):

Meat Quality ◽

Compensatory Growth ◽

Live Weight ◽

Grazing Intensity ◽

Carcass Composition ◽

Carcass Weight ◽

Eating Quality ◽

Winter Period ◽

Carcass Quality

SUMMARYTwo experiments concerning the effects, on the carcass and meat characteristics of 18-months-old Friesian steers, of variation in grazing intensity and the level of barley feeding with silage are reported.Groups of 12 steers were grazed at different intensities over 5-month grazing periods, such that live-weight differences of 38 kg and 16 kg were recorded at housing. No compensatory growth was recorded during the subsequent winter feeding period.Whilst the grazing treatments had little effect on carcass or meat quality, higher levels of barley feeding with silage over the winter period (710 v. 410 kg/steer) had significant effects on live-weight gain, and increased carcass weight by 21 kg at slaughter. The higher yield of carcass weight was reflected in significant differences in carcass composition, joint proportions and retail cut-out value. Sixty per cent of the carcass weight difference was removed as trim fat. Differences in carcass fatness were not associated with any differences in eating quality.

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Effect of hypothyroidism on growth performance, carcass composition and meat quality of fat-tailed Lori-Bakhtiari lambs

Animal Production Science ◽

10.1071/an14516 ◽

2015 ◽

Vol 55 (10) ◽

pp. 1324 ◽

Cited By ~ 2

Author(s):

Yousef Baghcheghi ◽

Ahmad Zare Shahneh ◽

Mahdi Ganjkhanlou ◽

Mahdi Khodaei Motlagh ◽

Ali Reza Yousefi

Keyword(s):

Growth Performance ◽

Meat Quality ◽

Conversion Efficiency ◽

Shear Force ◽

Carcass Composition ◽

Feed Conversion ◽

Feed Conversion Efficiency ◽

Mild Hypothyroidism ◽

Plasma Triiodothyronine

The aim of the present study was to investigate the effects of induction hypothyroidism by propylthiouracil (PTU) on the growth performance and meat quality of fat-tailed Lori-Bakhtiari lambs. Eighteen Lori-Bakhtiari male lambs were randomly assigned to one of three groups (n = 6) and received daily treatments (gavage) consisting of 0 (Control: C), 10 (Low: L) or 20 (High: H) mg PTU/kg bodyweight/day for 60 days. PTU decreased plasma triiodothyronine and thyroxine concentration in both L and H (P < 0.0001). Lambs treated with PTU (L and H) had lower feed intake (P < 0.004), feed conversion efficiency (P < 0.003), and greater intramuscular fat than C lambs (P < 0.035). Meat from the L and H lambs had lower cooking loss and shear force, and also higher L* (lightness) than C lambs (P < 0.004, P < 0.015 and P < 0.025, respectively). The meat of H and L lambs was more tender than C lambs (P < 0.032). However, the meat of H lambs required fewer chews before swallowing than C lambs (P < 0.041). Generally, induction of mild hypothyroidism appeared to improve feed conversion efficiency and meat quality of lambs.

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