Birth weight as a risk factor for perinatal lamb mortality, and the effects of stage of pregnant ewe supplementation and gestation weight gain in Ethiopian Menz sheep

Mukasa-Mugerwa, E.; Said, A.N.; Lahlou-Kassi, A.; Sherington, J.; Mutiga, E.R.

doi:10.1016/0167-5877(94)90014-0

Cited by 40 publications

(34 citation statements)

References 19 publications

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“…Variation in pre-weaning weight gain due to the parity found under the present study was in agreement with that reported by Awigichew [8] and Surafel et al [29]. Significant effect of parity on post-weaning weight gain reported by Surafel et al [29] was also in line with present result [30][31][32][33][34][35][36][37][38][39][40][41]. …”

Section: Effect Of Fixed Factors On Average Daily Gain (Adg) Of Aberasupporting

confidence: 83%

Effect of Non-Genetic Factors on Reproductive and Growth Performance of Abera Sheep under Community Based Breeding Program in SNNPRS Ethiopia

Marufa¹,

Taye²,

Abebe³

et al. 2017

J Adv Dairy Res

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The study was conducted in Sidama Zone, Dara District Southern Ethiopia. The intention was to investigate the effect of non-genetic factors on reproductive and growth performance of Abera sheep in the District. For this study three years (2013)(2014)(2015) performance data were obtained from Hawassa research center, Dara sub-site. Study identified age at first lambing (AFL) and lambing interval (LI) of the sheep were 9.6 and 12.9 months, respectively; while annual reproductive rate and litter size of the ewes were 1.9 and 1.5 heads. Average birth weight, weaning weight and 6 month weight of Abera sheep were 2.8, 12.3 and 18.5 kg, respectively; while pre and post weaning average daily weight gains were 106 and 40 g/day, respectively. Birth type, sex and year had significant (p<0.05) effect on birth weight (BWT), weaning weight (WWT) and six-months weight; whereas season and parity had significant (P<0.05) effect on BWT and WWT only. Sex and birth type had significant (p<0.01) effect on pre-weaning average daily gain whereas year, season and parity had significant effect on both pre and post-weaning average daily gain. There was within breed variability in growth traits, which were significantly influenced by non-genetic factors like birth type, sex, year, season and parity. Selection for further improvement to achieve higher lamb crop with superior growth performance should be prioritized as within population variability is raw material for improvement through selection. Molecular characterization should also be carried out to identify uniqueness of Abera sheep.

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Section: Effect Of Fixed Factors On Average Daily Gain (Adg) Of Aberasupporting

confidence: 83%

Effect of Non-Genetic Factors on Reproductive and Growth Performance of Abera Sheep under Community Based Breeding Program in SNNPRS Ethiopia

Marufa¹,

Taye²,

Abebe³

et al. 2017

J Adv Dairy Res

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“…This, in general, is in agreement with previous reports 8,9,18,[22][23][24][25] . It has previously been reported that lambs with a birth weight ≤3 kg have a significantly greater risk of mortality 16,26 . Khan et al 16 , hypothesized that lambs with low birth weight, being physically weak, were unable to suckle sufficient amounts of colostrum as a result the IgG concentration in their serum remained low, which might have led to an increased mortality and hypothermia in these lambs.…”

Section: Discussionmentioning

confidence: 99%

“…as strong lamb-dam interaction results in both colostrums production and colotrum intake in lambs and the control of body temperature with an aim to prevent hypothermia (adequate and early intake of colostrum by the lamb, treatment with glucose, enabling of drying of the animal etc.) are considered as important factors in the survival of lambs 18,22,26,[29][30][31] . Factors that have eff ect on birth weight include birth type and gender of lambs, prenatal nutrition, health status, parity and placental size of dam as well as foetal genotype 18,26,28,30 therefore, measures aimed at increasing birth weight should address these factors especially at last trimester of gestation.…”

Section: Discussionmentioning

confidence: 99%

“…However, some studies reported that, male lambs displayed higher mortality than females, particularly after the first three months of life 2,8,9,13,33,34 . This is attributed to dystocia caused by male lambs as they are usually born heavier and the advantage of female lambs to recognize their dams when compared to their male counterparts 15,22,26,30 . Similarly, Nash et al 15 , suggested that the gender variation observed in mortality, with females and castrated males having similar and lower risk, could refl ect the eff ect of male hormones on immune function.…”

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confidence: 99%

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Risk Factors Associated with Passive Immunity, Health, Birth Weight and Growth Performance in Lambs: I. Effect of Parity, Dam’s Health, Birth Weight, Gender, Type of Birth and Lambing Season on Morbidity and Mortality

Kırmızıgül¹,

Erdoğan²,

Çitil³

2013

Kafkas Univ Vet Fak Derg

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SummaryThis study was designed to examine the eff ect of birth weight, gender, birth type, lambing season, and dam parity and health status on lamb morbidity and mortality during the neonatal (first four weeks of life) and post-neonatal (first 5-12 weeks of life) periods in lambs born in two fl ocks in the 2009 lambing season in Kars, Turkey. EPI INFO 6 was used to determine diff erences in morbidity or mortality rates and risk according to risk factors including birth weights, genders, type of birth, lambing seasons, and parity and health of dams. The significance level was set at P<0.05 for all comparisons. The neonatal morbidity and mortality rates (48% and 33.3%, respectively) and risk of the lambs in the low birth weight group were significantly higher than those of the lambs in the medium birth weight (18.9%, X 2 =10.4, OR=3.9 for morbidity and 1.6%, X 2 =32.5, OR=30, for mortality) and high birth weight (9.8%, X 2 =26.9, OR=8.5 for morbidity and 1.2%, X 2 =46.5, OR=42.7 for mortality) groups (P<0.01 and P<0.001, respectively). The neonatal mortality rate and risk of lambs born in the winter season (9.2%) were significantly (P<0.01) higher than those of lambs born in the spring season (1.8%, X 2 =9.6 and OR=5.5). Lambs born to primiparous ewes had a neonatal morbidity rate (29.6%) and risk significantly higher than those of ewes at second parity (13.9%, X 2 =6.4, OR=2.6) and third parity (11.1%, X 2 =7.8, OR=3.3) (P<0.05 and P<0.01, respectively). Similarly, lambs born to primiparous ewes had a neonatal mortality rate (14.8%) and risk significantly higher than those of ewes at second parity (2.9%, X 2 =9.3, O=5.7), third parity (0%, X 2 =14.1) and ≥4 parity (2.4%, X 2 =4.2, OR=6.9) (P<0.001, P<0.001 and P<0.05, respectively). Lambs born to ill ewes had a neonatal morbidity rate (64.7%) and risk significantly higher (P<0.001) than those of lambs born to healthy ewes (13.8%, X 2 =30.38, OR=11.4). In the present study, it was concluded that the most significant risk factors for lamb morbidity and mortality were season of birth, parity, birth weight and health status of dams. Therefore, timely implemented health and management measures targeting these factors are required to reduce disease and death. .2, OR=6.9) doğumunu yapan annelerden doğan kuzulara göre önemli seviyede (sırasıyla P<0.001, P<0.001 ve P<0.05) yüksek bulundu. Herhangi bir hastalığa maruz kalan annelerden doğan kuzuların neonatal hastalanma oranı (%64.7) ve riski sağlıklı olan annelerden doğan kuzulara göre (%13.8, X 2 =30.38, OR=11.4) önemli seviyede (P<0.001) yüksek bulundu. Bu çalışmada kuzu hastalık ve ölümleri için en önemli risk faktörlerinin doğum sezonu, anne doğum sayısı, doğum ağırlığı ve annenin sağlık durumunun olduğu sonucuna varılmıştır. Bu nedenle, bu faktörler üzerine odaklanarak zamanında sağlık ve sevk-idare önlemlerinin sağlanması kuzu hastalık ve ölüm oranlarını azaltmak için gereklidir.

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“…The average family size of the households was 11 ± 0.6 (ranging from [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24] and it is higher than the average values at the national (5.2) levels [6]. This is attributed to low awareness of family planning.…”

Section: Socio-economic Characteristics Of the Householdsmentioning

confidence: 99%

Sheep and Goat Production Systems in Degehabur Zone, Eastern Ethiopia: Challenge and Opportunities

Kefyalew¹

2015

J Adv Dairy Res

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Birth weight as a risk factor for perinatal lamb mortality, and the effects of stage of pregnant ewe supplementation and gestation weight gain in Ethiopian Menz sheep

Cited by 40 publications

References 19 publications

Effect of Non-Genetic Factors on Reproductive and Growth Performance of Abera Sheep under Community Based Breeding Program in SNNPRS Ethiopia

Effect of Non-Genetic Factors on Reproductive and Growth Performance of Abera Sheep under Community Based Breeding Program in SNNPRS Ethiopia

Risk Factors Associated with Passive Immunity, Health, Birth Weight and Growth Performance in Lambs: I. Effect of Parity, Dam’s Health, Birth Weight, Gender, Type of Birth and Lambing Season on Morbidity and Mortality

Sheep and Goat Production Systems in Degehabur Zone, Eastern Ethiopia: Challenge and Opportunities

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