Fluctuations in energy-related metabolites during the peri-parturition period in Lori-Bakhtiari ewes

Raoofi, Afshin; Jafarian, Mojtaba; Safi, S.; Vatankhah, M.

doi:10.1016/j.smallrumres.2012.06.012

Cited by 32 publications

(33 citation statements)

References 16 publications

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“…Gluconeogenesis in ruminants does not increase with increased fetal demands during pregnancy and it may cause energy deficit in maternal tissues (RAOOFI et al, 2013). Low concentrations of serum glucose in pregnant ewes are probably the consequence of inappropriate gluconeogenesis in the liver from glucogenoplastic precursors, such as propionate, that originate from rumen fermentation.…”

Section: Discussionmentioning

confidence: 99%

Comparison of circulating metabolic and hepatic indices between fat-tailed and semi-fat-tailed ewes in different pre and post-partum periods

Chalmeh¹,

Pourjafar²,

Badiei³

et al. 2019

Vet. arhiv

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SEBdAni: Comparison of circulating metabolic and hepatic indices between fattailed and semi-fat-tailed ewes in different pre and post-partum periods. Vet. arhiv 89, 43-53, 2019. ABSTrACT Tail fat is present in some breeds of sheep and they use this fat according to their energy requirements. We hypothesized that this fat deposition may interfere with the metabolism of ewes during pregnancy and lactogenesis. Hence, the present study was carried out to clarify the probable effect of tail fat on metabolic and hepatic biomarkers during different pre-and post-partum periods of fat-tailed in comparison with semifat-tailed ewes. Adult Mehraban (n = 10) and Chios (n = 10) ewes were selected and blood sampling was performed from all ewes at 2 and 4 months after mating, and 1, 2 and 3 months after parturition. Serum concentrations of glucose, total protein, albumin, globulin, aspartate aminotransferase, alanine transaminase, gamma glutamyl transferase, beta-hydroxy acid, non-esterified fatty acids, triglyceride, cholesterol, high, low and very low density lipoproteins, total, direct and indirect bilirubin were assayed in all specimens. Glucose in Chios ewes was significantly higher than in Mehraban at all the times studied. The circulating levels of aspartate aminotransferase, alanine transaminase, gamma glutamyl transferase, triglyceride, cholesterol, high, low and very low density lipoproteins, beta-hydroxy acid and non-esterified fatty acids were significantly higher in Mehraban ewes than in the Chios breed at different pre-and post parturient periods. The results of the current research revealed that metabolic and hepatic biomarkers alter during the pregnancy and lactation periods in sheep, which reflects the energy demands and metabolic alterations during these periods. Furthermore, it may be stated that the presence of tail fat in Mehraban ewes may alter the metabolic and hepatic functions in this breed. Tail fat may interfere with lipid metabolism and hepatic function during peri-parturient periods and it may be suggested that semi-fat-tailed breeds, such as Chios, may have more intensive metabolic pathways due to lower body fat storages.

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Section: Discussionmentioning

confidence: 99%

Comparison of circulating metabolic and hepatic indices between fat-tailed and semi-fat-tailed ewes in different pre and post-partum periods

Chalmeh¹,

Pourjafar²,

Badiei³

et al. 2019

Vet. arhiv

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“…BHBA concentration 30 days before parturition was weakly positively correlated with milk yield produced until 30 DIM. It was previously reported that, blood BHBA concentration increases during late gestation and may reach its peak before or around lambing (Raoofi et al 2013;Karagiannis et al 2014). It is possible that the ewes with potential for higher milk production could have higher energy metabolism before lambing, expressed as increased BHBA concentrations.…”

Section: Discussionmentioning

confidence: 99%

Associations of periparturient β-hydroxybutyric acid and non-esterified fatty acids blood serum concentrations with milk yield, milk composition and milk somatic cells count of intensively managed Chios dairy ewes

Karagiannis

Brozos

Kiossis

et al. 2019

J Hellenic Vet Med Soc

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This Research Paper addresses the hypothesis whether in dairy ewes: periparturient β-hydroxybutyric acid (BHBA) and non-esterified fatty acids (NEFA) concentrations are associated with milk yield, composition and udder halves with increased somatic cell counts (SCC ≥ 0.5 × 106 cells/mL). A total of 186 Chios ewes reared under intensive system were used for this research. Serum BHBA and NEFA concentrations were measured before lambing (-30d, -15d), and BHBA concentrations after lambing (+7d, +15d, +30d, +45d). Milk samples were collected at 15, 30 and 45days in milk (DIM). Total milk yield (MY) of the first 30, 60 and 90 DIM and total fortnightly milk yield (FMY) produced from 15 to 59 DIM were recorded. Positive associations between BHBA at +7d and MY of the first 30, 60 and 90 DIM were revealed (P < 0.001). For every increased unit of BHBA at +15d, +30d and +45d, FMY was decreased (DIM: 15 – 29 and 30 – 44) (P = 0.001 and P = 0.015, respectively) or increased (DIM: 45 – 59) (P < 0.001). BHBA before lambing (-30d, -15d) affected the number of halves presented SCC ≥ 0.5 × 106 cells/mL at 15 and 30 DIM (P = 0.011, P = 0.014, P = 0.009, P = 0.096, respectively). Finally, for every increased unit of BHBA during lactation (+15d, +30d, +45d) a decrease in the concentration of milk in proteins, solids not fat and lactose was noted (P < 0.001). This work demonstrates the associations of periparturient blood biochemical parameters (BHBA, NEFA) with milk yield and specific milk production characteristics.

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“…The Lori-Bakhtiari ewe breed is one of the most numerous and widespread sheep breeds mainly in the southwestern parts of Iran (the Zagros Mountains), in the Kohgiluyeh and Boyerahmad, Isfahan, and Khuzestan provinces, and particularly in the Chaharmahal and Bakhtiari province [16]. The physical characteristics and the productive performances of Lori-Bakhtiari ewes include an adult live weight of 68-77 kg, height of 70-75 cm, fat-tail weight of 8-10 kg, milk yield of 85-100 L per 6 months, 1.17 lambs per year, and fleece weight of 2.5-3 kg per year [17]. Average body weight of rams is 95-125 kg.…”

Section: Site Of the Study And Breed Descriptionmentioning

confidence: 99%

Structural and functional changes in corpus luteum of single- and/or double-ovulated pregnant and nonpregnant ewes during the spring and autumn seasons

Habibizad¹,

Karami²,

Dolatabady³

et al. 2020

Turk J Vet Anim Sci

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This study was conducted to investigate the effect of ovulation numbers on the progesterone and luteal volume in nonpregnant and pregnant Lori-Bakhtiari ewes. In the spring season 48 reproductive tracts of nonpregnant ewes (treatments included single ovulation, unilateral double ovulations, and bilateral double ovulations) and in the autumn season 144 reproductive tracts of nonpregnant and pregnant ewes (single ovulation, unilateral double ovulations, bilateral double ovulations, single ovulation with 1 foetus, single ovulation with 2 foetuses, unilateral double ovulations with 1 foetus, unilateral double ovulations with 2 foetuses, bilateral double ovulations with 1 foetus, bilateral double ovulations with 2 foetuses) were collected. The results indicated that the mean volume of the individual corpus luteum (CL) and the total volume of CL in the autumn season were significantly higher than the spring season. However, there were no significant differences in the progesterone concentration between unilateral and bilateral double ovulations. The results also indicated that in ewes with double ovulations and 1 foetus, the total volume of CL and the progesterone concentration were higher than those of the ewes with single ovulation and 1 or 2 foetuses. It was concluded that increasing the incidence of twinning rate does not appear to be a prerequisite for the presence of 2 CLs in the ewes.

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Fluctuations in energy-related metabolites during the peri-parturition period in Lori-Bakhtiari ewes

Cited by 32 publications

References 16 publications

Comparison of circulating metabolic and hepatic indices between fat-tailed and semi-fat-tailed ewes in different pre and post-partum periods

Comparison of circulating metabolic and hepatic indices between fat-tailed and semi-fat-tailed ewes in different pre and post-partum periods

Associations of periparturient β-hydroxybutyric acid and non-esterified fatty acids blood serum concentrations with milk yield, milk composition and milk somatic cells count of intensively managed Chios dairy ewes

Structural and functional changes in corpus luteum of single- and/or double-ovulated pregnant and nonpregnant ewes during the spring and autumn seasons

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