Lifetime Reproductive and Lamb Crop Yields of Fat-tailed Naeemi and Imported Border Leicester Merino Ewes in Intensive System of Production

Mohammed, Samira Ahmed; Razzaque, Mohammed Abdur

doi:10.1016/j.smallrumres.2016.10.006

Cited by 2 publications

(2 citation statements)

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“…As repeatedly reported by different researchers, sheep can also give birth in off-season. However, survival rate and fertility characteristics are adversely affected in off-season births [5,10,8,19,16,21]. In the current study, it is realized that there is a problem in herds in terms of survival rate from March to October, which is a period that is accepted as out of birth season in the region.…”

Section: Resultsmentioning

confidence: 95%

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: 95%

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 insufficient content of minerals in feed and disturbance of their proportions, their digestibility and assimilation of nutrients in feed is often reduced. This, in turn, leads to a decrease in productivity and reproductive ability of animals and the occurrence of various diseases associated with mineral deficiency (Mohammed and Razzaque, 2016;Uslu et al, 2017;Kwiatkowski and Sldonskl, 1987;Lapshin, 1979;Mungin, 2009). Despite the detailed study of manganese metabolism in the organism of ewes, the issues of rationing this element in diets of fat-tailed ewes depending on their physiological condition and zonal features of their breeding remain insufficiently studied.…”

Section: Introductionmentioning

confidence: 99%

The Biological Justification of Manganese Requirements in Fat-Tailed Ewes in Arid Zone Conditions

Gayirbegov¹,

Mandzhiev²

2021

J Biochem Technol

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The article presents the results of physiological research carried out in a large sheep farm in the arid zone of southern Russia to study the manganese metabolism of single ewes of the Kalmyk breed and to establish their needs for this element by a factorial method of research. A scientific justification is given for optimizing the ration of manganese in single mutton ewes. The dynamics of the manganese content in the organs and tissues of the sheep and the organism of single mutton ewes for the first time have been revealed. Considering the physiological state of the ewes, the real daily requirement of the ewes in the studied microelement and the degree of its assimilation from the diets have been determined. It has been established that the intensity of manganese metabolism in the organism of fat-tailed ewes has been considerably increased during the non-dairy period and the distribution of manganese in their bodies has not been even. It has been higher in udder, uterus, chyme, omasum, and liver, and lowerin the fat of sheep's tail, blood, and internal fat. The factorial method about endogenous losses in feces and urine has been used to determine the daily requirement of manganese in the dry weight of single fat-tailed sheep. The daily requirement is 82 mg per head per day, or 50.3 mg/kg of dry substance of a diet and 1.44 mg/kg of live weight of an ewe.

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Lifetime Reproductive and Lamb Crop Yields of Fat-tailed Naeemi and Imported Border Leicester Merino Ewes in Intensive System of Production

Cited by 2 publications

References 10 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

The Biological Justification of Manganese Requirements in Fat-Tailed Ewes in Arid Zone Conditions

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