De Kalyan, Swarnkar C P, Prince L L L, Ali S F
Adaptation Physiology Laboratory, Animal Physiology and Biochemistry Division, ICAR-Central Sheep and Wool Research Institute, Avikanagar, Rajasthan, 304501, India.
Division of Animal Health, ICAR-Central Sheep and Wool Research Institute, Avikanagar, Rajasthan, 304501, India.
Trop Anim Health Prod. 2019 Jan;51(1):249-255. doi: 10.1007/s11250-018-1653-0. Epub 2018 Jul 4.
The limitation in feed availability in the semi-arid region during the lean period can result in a variation of the body condition, body weight of pregnant ewe which in turn may affect the lamb birth weight, colostrum immunoglobulin, growth hormone (GH), and insulin-like growth factor-1 (IGF-1). Therefore, the present study was initiated to assess the interrelationship between late gestational ewe factor and early life lamb factors in the semi-arid tropical region. For this purpose, 83 Malpura and 45 Avikaline pregnant ewes were selected and their body condition score (BCS) at late gestation, body weight at lambing, and birth weight of lambs was recorded. The BCS of ewes in late gestation had significant (P < 0.001) positive correlation (r = 0.465) with the birth weight of lambs. The body weight at lambing was significantly (P < 0.05) higher in single-lamber ewes as compared to twin-bearing ewes. The plasma IGF-1 of lamb increased significantly (P < 0.05) with the increase of BCS of ewe at the late gestation as well as body weight after lambing. The colostrum of twin-lamb producing ewes had higher (P < 0.05) IgG content than single-lamb producing ewes. The concentration of IGF-1 was significantly (P < 0.05) higher in single-born lamb as compared to twin-born lamb. Based on the results of the present study, it is to conclude that higher BCS at late gestation and higher body weight of ewes at lambing is desirable for producing lambs with a higher birth weight having higher growth potential as well as chances of survival.
在半干旱地区的饲料匮乏期，饲料供应的限制可能导致怀孕母羊的体况和体重发生变化，进而可能影响羔羊出生体重、初乳免疫球蛋白、生长激素（GH）和胰岛素样生长因子-1（IGF-1）。因此，本研究旨在评估半干旱热带地区妊娠后期母羊因素与羔羊早期生活因素之间的相互关系。为此，选择了83只马尔普拉母羊和45只阿维卡琳怀孕母羊，并记录了它们妊娠后期的体况评分（BCS）、产羔时的体重和羔羊出生体重。妊娠后期母羊的BCS与羔羊出生体重呈显著正相关（P < 0.001，r = 0.465）。单羔母羊产羔时的体重显著高于双羔母羊（P < 0.05）。随着妊娠后期母羊BCS以及产羔后体重的增加，羔羊的血浆IGF-1显著增加（P < 0.05）。产双羔母羊的初乳IgG含量高于产单羔母羊（P < 0.05）。单胎羔羊的IGF-1浓度显著高于双胎羔羊（P < 0.05）。基于本研究结果，得出结论：妊娠后期较高的BCS和产羔时母羊较高的体重有利于生产出生体重较高、具有较高生长潜力和存活机会的羔羊。
