Phenotypic factors associated with lamb live weight and carcass composition measurements in an Irish multi-breed sheep population1

McGovern, Fiona; McHugh, N.; Fitzmaurice, Shauna; Pabiou, T.; McDermott, Kevin; Wall, E.; Fetherstone, Nicola

doi:10.1093/tas/txaa206

Cited by 12 publications

(5 citation statements)

References 32 publications

(28 reference statements)

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“…The reason for the convergence of proportions in male and female newborns is due to the type of feed provided to animals and its containment of essential nutrients in addition to the availability of pastures that contribute to increasing the proportions of milk components. These results agreed with what was reported by McGovern et al (2020).…”

Section: -Factors Affecting In the Proportions Of Milk Componentssupporting

confidence: 94%

Factors Affecting in Some Productive Traits for Local and Turkish Awassi Sheep

Shihab

Abdullah

Abdulrahman

2022

TJAS

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The aim of study effecting fixed factors (breed, year of birth, age of dam, sex of lambs) in total milk yield and milk composition and some of growth traits (birth weight and weaning weight), the overall mean of milk yield (66.58 ±1.67. kg) ,it was breed effect significant (P<0.05) , while the effect factors (birth year, age of the ewe, sex of lambs, type of birth) was not significant, , the overall mean of milk components (fat, lactose, protein, non-fat solids) was 4.18 ± 0.29, 4.42 ± 0.02, 5.47 ± 0.11 and 10.69 ± 0.14 %, respectively ,the factors are non- significant effect on milk composition, the overall mean of birth weight was 4.76 ± 0.06 kg, the breed, year of birth, age of the ewe and the sex lambs did not effect on it, weight at weaning was 19.77 ± 0.27 kg. The effect of breed was highly significant, as the Turkish Awassi breed advantage to the local, while the factors (year of birth, age of ewe, sex of lambs) were non- significant effect on weaning weight. We conclude the local Awassi was superior to the Turkish in total milk yield. The birth weight of Turkish Awassi was slightly higher on the local, but dominant was highly significant in weaning weight.

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Section: -Factors Affecting In the Proportions Of Milk Componentssupporting

confidence: 94%

Factors Affecting in Some Productive Traits for Local and Turkish Awassi Sheep

Shihab

Abdullah

Abdulrahman

2022

TJAS

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“…This indicator significantly influenced the live weight of lambs of different ages, and this effect was relatively higher on the live weight at weaning. McGovern et al [16] investigated phenotypic factors influencing lambs' body weight and carcass size in Ireland. They recorded heavier body weights at birth, before weaning and at weaning in single lambs.…”

Section: Research Results and Discussionmentioning

confidence: 99%

Features of Effective Breeding Methods to Improve the Reproduction Ability of Kazakh Rough-Wooled Sheep

Malmakov,

Kulataev,

Iskakov

et al. 2023

Izdenister natigeler

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The article presents the materials of the most valuable quality of fat-tailed sheep, along with high precocity, regular fertility is the high viability of the offspring, which serves as an objective criterion for their adaptive ability to various paratypes factors and to study the reproductive productivity of Kazakh fat-tailed sheep in two flocks, 1165 freshly received ewes were cervically inseminated sperm of Kazakh fat-tailed rams. Ewes in natural estrus were detected once daily in the morning from 7 to 8 a.m. with the aid of the teaser rams. Sperm from 6 sire-rams was collected with the aid of an artificial vagina. Double cervical insemination was performed at 9-10 a.m. and 4-5 p.m. On average 78% or 921 ewes out of 1165 inseminated lambed ranging from 76% to 81% in two flocks. Total of 1080 lambs were born, or 117.3 lambs per 100 lambed ewes. Body weights in the single newborn ram and ewe lambs were 5.04±0.07 (n=108) and 4.44±0.07 kg (n=98), while in the twin males and females were 3.94±0.08 (n=20) and 3.79±0.09 kg (n=18), respectively. It is concluded that Kazakh fat-tailed sheep have a high reproductive capacity.

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“…In the current study CH 4 output only differed by breed in lambs and pregnant ewes. Two terminal breeds, Suffolk and Texel were used in the present study, with previous studies showing small differences in LW and performance traits between both breeds ( Latif and Owen, 1980 ; McGovern et al, 2020 ). When LW was removed from the model, the effect of breed on CH 4 output in pregnant ewes was no longer observed, indicating, that for pregnant ewes, at least, the breed differences could be explained by differences in LW.…”

Section: Discussionmentioning

confidence: 99%

Methane output across life stages in sheep, how it differs from lambs to adult ewes using portable accumulation chambers

Connor,

McHugh,

Dunne

et al. 2024

Journal of Animal Science

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Methane (CH4) produced from enteric fermentation is a potent greenhouse gas produced by ruminant animals. Multiple measurements are required across life stages to develop an understanding of how CH4 output changes throughout the animal’s lifetime. The objectives of the current study were to estimate CH4 output across life stages in sheep and to investigate the relationship between CH4 output and dry matter intake (DMI). Data were generated on a total of 266 female Suffolk and Texel animals. Methane and carbon dioxide (CO2) output, estimated using portable accumulation chambers, and DMI, estimated using the n-alkane technique outdoors and using individual penning indoors, were quantified across the animal’s life stage; as lambs (< 12 months), nulliparous hoggets (12 to 24 months) and ewes (primiparous or greater; > 24 months). Ewes were further classified as pregnant, lactating and dry (non-pregnant and non-lactating). Multiple measurements were taken within and across life stages on the same animals. A linear mixed model was used to determine if CH4 and CO2 output differed across life stages and using a separate linear mixed model the factors associated with CH4 output within each life stage were also investigated. Methane, CO2 output and DMI differed by life stage (P<0.05), with lactating ewes producing the greatest amount of CH4 (25.99 g CH4/day) and CO2 (1711.6 g CO2/day), while also having the highest DMI (2.18 kg dry matter/day). Methane output differed by live-weight of the animals across all life stages (P<0.001). As ewe body condition score increased CH4 output declined (P<0.05). Correlations between CH4 output measured across life stages ranged from 0.26 (SE 0.08; lambs and lactating ewes) to 0.59 (SE 0.06; hoggets and pregnant ewes), while correlations between CO2 output measured across life stages ranged from 0.12 (SE 0.06; lambs and hoggets) to 0.65 (SE 0.06; hoggets and lactating ewes). Dry matter intake was moderately correlated with CH4 (0.44; SE 0.04) and CO2 output (0.59; SE 0.03). Results from this study provide estimates of CH4 output across life stages in a pasture-based sheep production system and offer valuable information for the national inventory and the marginal abatement cost curve on the optimum time to target mitigation strategies.

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Phenotypic factors associated with lamb live weight and carcass composition measurements in an Irish multi-breed sheep population1

Cited by 12 publications

References 32 publications

Factors Affecting in Some Productive Traits for Local and Turkish Awassi Sheep

Factors Affecting in Some Productive Traits for Local and Turkish Awassi Sheep

Features of Effective Breeding Methods to Improve the Reproduction Ability of Kazakh Rough-Wooled Sheep

Methane output across life stages in sheep, how it differs from lambs to adult ewes using portable accumulation chambers

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