Metabolic and hormonal control of energy utilization and partitioning from early to mid lactation in Sarda ewes and Saanen goats

Lunesu, Mondina Francesca; Bomboi, Giovanni Cristoforo; Marzano, A.; Comin, A.; Prandi, Alberto; Sechi, Pietro; Nicolussi, Paola; Decandia, M.; Manca, C.; Atzori, Alberto Stanislao; Molle, G.; Cannas, Antonello

doi:10.3168/jds.2020-19462

Cited by 9 publications

(9 citation statements)

References 47 publications

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“…Metabolic status as well as hormonal regulation are two crucial factors involved in the mammary gland development during the dry period in sheep [ 23 ]. In addition, dairy ruminants around parturition are often under NEB due to the reduced feed intake capacity and the increased energy output [ 5 ].…”

Section: Discussionmentioning

confidence: 99%

Prepartum and Postpartum Feed Restrictions Affect Blood Metabolites and Hormones Reducing Colostrum and Milk Yields in Fat-Tailed Dairy Sheep

Zarrin

Sanginabadi

Nouri

et al. 2021

Animals

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This study aimed to investigate the effect of prepartum and postpartum feed restriction on body weight (BW), blood metabolites, and hormones as well as colostrum and milk yields and compositions in fat-tailed dairy sheep. In this study, 20 multiparous and pregnant ewes were randomly allocated to either the control (Ctrl; n = 10) or the feed-restricted (FR; n = 10) groups from week −5 to week 5 relative to parturition. Despite dry matter intake being decreased in the FR group compared to the Ctrl throughout both prepartum and postpartum periods, no differences in BW were detected between groups in any of the studied periods. Feed restriction increased both free fatty acids and beta-hydroxybutyrate concentrations during both prepartum and postpartum periods. Similarly, feed restriction increased triglyceride concentration postpartum. Additionally, feed restriction increased insulin and growth hormone and decreased prolactin concentrations during both prepartum and postpartum periods. Feed restriction caused a decreased colostrum yield and a relative increase of the main colostrum components in the FR group. Similarly, milk yield decreased in the FR group compared to the Ctrl group, although milk components were not affected. In conclusion, feed restriction did not affect BW but decreased colostrum and milk yield in fat-tailed dairy sheep.

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Section: Discussionmentioning

confidence: 99%

Prepartum and Postpartum Feed Restrictions Affect Blood Metabolites and Hormones Reducing Colostrum and Milk Yields in Fat-Tailed Dairy Sheep

Zarrin

Sanginabadi

Nouri

et al. 2021

Animals

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“…During this period, all animals were fed the same high-starch diet used later in the experimental period. More details concerning the preliminary period were previously described by Lunesu et al [ 10 ]. At the end of the preliminary period, and hence from 92 ± 11 DIM, 30 mature Sarda dairy ewes and 26 mature Saanen dairy goats were allocated to two dietary groups: high-starch ( HS ; 15 ewes + 13 goats) and low-starch ( LS ; 15 ewes + 13 goats) groups.…”

Section: Methodsmentioning

confidence: 99%

Dietary Starch Concentration Affects Dairy Sheep and Goat Performances Differently during Mid-Lactation

Lunesu

Decandia

Molle

et al. 2021

Animals

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Evolution of milk production, body reserves and blood metabolites and their relationships with dietary carbohydrates were compared in 30 Sarda dairy ewes and 26 Saanen dairy goats in mid-lactation. From 92 to 152 ± 11 days in milk (DIM), each species was allocated to two dietary treatments: high-starch (HS: 20.0% starch, on DM basis) and low-starch (LS: 7.8% starch, on DM basis) diets. In mid-lactating goats, the HS diet increased fat-corrected milk yield (FCM (3.5%); 2.65 vs. 2.53 kg/d; p = 0.019) and daily milk net energy (NEL; p = 0.025), compared to the LS diet. The body condition score (BCS) was not affected. In mid-lactating ewes, the LS diet increased FCM (6.5%) (1.47 vs. 1.36 kg/d; p = 0.008), and NEL (p = 0.008), compared to the HS diet. In addition, BCS was greater in HS than in LS ewes (3.53 vs. 3.38; p = 0.008). Goats had a higher growth hormone (GH) and lower insulin concentration than ewes (GH: 2.62 vs. 1.37 ng/mL; p = 0.04; insulin: 0.14 vs. 0.38 µg/L; p < 0.001 in goats and ewes, respectively). In conclusion, in mid-lactation, the two species responded differently to dietary carbohydrates, probably due to differences in the concentration of GH and insulin. The HS diet favored milk yield in goats and body reserve accumulation in ewes. In ewes, the partial replacement of starch with highly digestible fiber increased energy partitioning in favor of milk production.

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“…Breast milk contains nutrients that support the survival, development, digestive, and immune needs of the offspring and is also an indicator of energy consumption (Lunesu et al. 2021). Milk is processed into various dairy products, mainly cheese, butter, yogurt, cream, ice cream, and infant formula, but the nutritional value and proper processing of milk into dairy products depend on the quality of the milk (Sepe and Argüello 2019).…”

Section: Introductionmentioning

confidence: 99%

“…2020; Lunesu et al. 2021). These studies have also been carried out using models that partially reflect the role of foremilk and hindmilk physicochemical components.…”

Section: Introductionmentioning

confidence: 99%

Physicochemical quality characteristics of foremilk and hindmilk from native and crossbred dairy goats in a semi‐intensive production system

Erduran

2023

Int J of Dairy Tech

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The focus of this study was to investigate how the relative levels of physicochemical compositions in foremilk and hindmilk change during lactation and how they differed in relation to environmental factors and the offspring and maternal factors (including genotype, parity, offspring sex, birth type, flock, and year) that might influence these changes. The effects of these compositional changes on functional and health during lactation were then assessed. In conclusion, the effects of environmental factors on the physicochemical components of foremilk and hindmilk varied throughout lactation, and it is highly likely that these changes reflect the changing requirements of the mother and the growing offspring.

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Metabolic and hormonal control of energy utilization and partitioning from early to mid lactation in Sarda ewes and Saanen goats

Cited by 9 publications

References 47 publications

Prepartum and Postpartum Feed Restrictions Affect Blood Metabolites and Hormones Reducing Colostrum and Milk Yields in Fat-Tailed Dairy Sheep

Prepartum and Postpartum Feed Restrictions Affect Blood Metabolites and Hormones Reducing Colostrum and Milk Yields in Fat-Tailed Dairy Sheep

Dietary Starch Concentration Affects Dairy Sheep and Goat Performances Differently during Mid-Lactation

Physicochemical quality characteristics of foremilk and hindmilk from native and crossbred dairy goats in a semi‐intensive production system

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