Comparison of purebred and crossbred D’man ewes and their terminal-sired progeny under accelerated lambing

Boujenane, I.

doi:10.1016/j.smallrumres.2012.05.003

Cited by 5 publications

(4 citation statements)

References 27 publications

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“…The season when the sheep show oestrus behaviours is called a mating season. The length of this period and reproductive performance of sheep are influenced by different factors such as genetic background, age, breed, season, herd management and feeding [1,3,4,9,17,22]. As shown in Table 1, the Awassi ewes usually gave birth in December and January (P<0.05).…”

Section: Resultsmentioning

confidence: 99%

“…Yılmaz et al [24] reported that Norduz lambs born in the winter season were heavier than those born in the spring period. On the other hand, Boujenane [1] stated that the birth and weaning weights in D'man sheep were affected by season and that the lambs born in spring had lower live weight than lambs born in the summer period. In the same study, weaning weights were reported as 25.1 kg for the February-March periods, 21.8 kg for the June-July and 22.1 kg in October-November periods.…”

Section: Resultsmentioning

confidence: 99%

“…Reproductive performance in small ruminants varies depending on the season as well as the other factors such as genetics, age, herd and year [1,3,4,9,17,22]. Although small ruminants usually show seasonal oestrus, it is known that animals of some breeds mate unseasonal or mating periods may take longer than the others [2,12].…”

Section: Introductionmentioning

confidence: 99%

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Effects of different lambing season on some reproductive characteristics of ewes and growth performance of lambs in Awassi sheep

Keskin¹,

Gül²,

Biçer³

et al. 2020

Lalahan Hayvancılık Araştırma Enstitüsü Dergisi

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In this study, it was aimed to determine the performance of Awassi sheep and their lambs in different season within the scope of the national breeding project carried out in Gaziantep. For this purpose, a total of 23490 heads of ewes and its lambs reared in different herds and under natural conditions were used in Gaziantep. The study covers the period between 2014 and 2017. The preliminary descriptive statistics showed that 35.24% and 25.47% of the ewes gave birth in January and December, respectively. Furthermore, the lamb survival rate at the weaning age was calculated to be 97.54% in February and 97.52% in December. The highest and the lowest birth weights were detected as 4.2 ± 0.01 kg and 2.7 ± 0.09 kg in January and May, respectively (P<0.01). On the other hand, the highest and lowest mean values for weaning weight (60 th day live weight) were determined as 21.1 ± 0.11 kg and 15.4 ± 0.45 kg in lambs respectively born in October and May (P<0.01). As a result, it can be stated that the most appropriate mating period for Awassi sheep reared in Gaziantep province is between August and September considering the reproductive characteristics and lamb growing.Gül S at al. Effects of different lambing season on some reproductive characteristics of ewes

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Effects of different lambing season on some reproductive characteristics of ewes and growth performance of lambs in Awassi sheep

Keskin¹,

Gül²,

Biçer³

et al. 2020

Lalahan Hayvancılık Araştırma Enstitüsü Dergisi

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“…Due to triplet lambs receiving proportionally less milk than their singleton and twin counterparts they display slower growth to weaning and lighter weaning weights (Peart and Donaldson 1972;Fahmy 1989;Gallo and Davies 1991;Emsen and Yaprak 2006;Corner et al 2008;Boujenane 2012;Paganoni et al 2014;Behrendt et al 2019). In addition, the number of lambs weaned within a triplet set can negatively affect individual lamb weaning weights (Table 4), although total weaning weight of a litter is highest when all three lambs are weaned.…”

Section: Lamb Growthmentioning

confidence: 99%

Triplet lambs and their dams – a review of current knowledge and management systems

Kenyon

Fraga

Blumer

et al. 2019

New Zealand Journal of Agricultural Research

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Triplet-bearing ewes and their lambs have the potential to improve flock productivity however, the lack of robust information on optimal nutrition and management is limiting their performance. In comparison to twins, the triplet lamb is; lighter, more metabolically challenged, has lower body temperature, and receives less colostrum and milk which combined results in lower survival rates and weaning weights. While scientifically based management guidelines are available for singletons and twins, guidelines are generally lacking for triplets. Although there is some knowledge on the impacts of nutrition, further studies are required to examine the impacts of varying feeding regimens in pregnancy and lactation, across the body condition range. Characterising the impacts of shelter and other paddock factors, stocking rate, mob size and human intervention would also be of benefit. Future studies must be large enough to allow for evaluation of lamb survival and litter birth weight variation.

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Growth at fattening and carcass characteristics of D’man, Sardi and meat-sire crossbred lambs slaughtered at two stages of maturity

Boujenane

2015

Trop Anim Health Prod

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The objective of this study was to evaluate growth at fattening, carcass characteristics and carcass measurements of 19 Sardi, 19 D'man and 52 meat-sire crossbred lambs of both sexes slaughtered at 50 and 70 % of mature weight. Crossbred lambs were born from Sardi, D'man and F1 Sardi × D'man ewes mated to meat-breed rams (Ile de France and Mérinos Précoce). Lambs of each group (breed type by sex) were chosen at random and slaughtered either at 50 or 70 % of mature weight. Sardi and D'man purebred lambs had significantly lower growth at fattening, pre-slaughter live weight, empty body weight, hot carcass weight, carcass conformation, carcass fatness, red offal, white offal, sub-products and non-carcass fat than meat-sire crossbred lambs. Differences were 42.2 g/day, 5.03 kg, 4.46 kg, 2.57 kg, 0.96, 0.59, 0.18 kg, 0.39 kg, 0.63 kg and 0.12 kg, respectively. B and Wr measurements of meat-sire crossbred lambs were higher than those of Sardi and D'man purebred lambs, whereas the F measurement was in favour of purebreds. Likewise, CC, G/F and Wr/Th indices of meat-sire crossbreds were higher than those of purebreds; however, the opposite was observed for L/G and Th/G indices. Maternal heterosis was positive and not significant for most traits, negative and not significant for few traits (P > 0.05), but negative and significant for the proportion of sub-products (P < 0.05). It was concluded that growth and carcass characteristics of local sheep can be significantly improved by terminal crossbreeding.

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Comparison of purebred and crossbred D’man ewes and their terminal-sired progeny under accelerated lambing

Cited by 5 publications

References 27 publications

Effects of different lambing season on some reproductive characteristics of ewes and growth performance of lambs in Awassi sheep

Effects of different lambing season on some reproductive characteristics of ewes and growth performance of lambs in Awassi sheep

Triplet lambs and their dams – a review of current knowledge and management systems

Growth at fattening and carcass characteristics of D’man, Sardi and meat-sire crossbred lambs slaughtered at two stages of maturity

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