The effects of parity, litter size, physiological state, and milking frequency on the metabolic profile of Lacaune dairy ewes

García, Eliel González; Tesnière, Anne; Camous, Sylvaine; Bocquier, François; Barillet, Francis F.; Hassoun, Philippe

doi:10.1016/j.domaniend.2014.07.001

Cited by 41 publications

(42 citation statements)

References 27 publications

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“…This finding is agreement with the findings of many researchers (Kenyon and Blair, 2014;González-García et al, 2015;González-García and Hazard, 2016;Griffiths et al, 2016). The lighter birth weights of lambs born to primiparous ewes compared to multiparous ewes can be explained by the fact that the uterus environment of primiparous dams was not fully developed, especially with regard to size (González-García et al, 2015).…”

Section: Discussionsupporting

confidence: 92%

“…The return rate might be affected by fertility failure or early embryonic deaths for reasons relating to physiological, endocrine and environmental factors (Diskin and Morris, 2008;Catunda et al, 2013). The BCS or body fat reserves are significant effective factors affecting reproductive performance, especially altering or regulating basic hormones that affect the ovulation rate, fertility, and the implantation and maintenance of gestation (Catunda et al, 2013;Boudreau et al, 2014;González-García et al, 2015).…”

Section: Discussionmentioning

confidence: 99%

“…On the other hand, the BW and BCS of an animal are affected by parity. The parity affects an animal's reproductive traits such as offspring yield, fertility rate and kilograms born/ewes conceived (Abdel-Mageed and Abd El-Gawad, 2015;González-García et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

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Body condition status at mating affects gestation length, offspring yield and return rate in ewes

2018

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Abstract. The present study was planned to determine the effect of ewe body condition score (BCS) and parities on fertility, return rate, gestation length, fecundity, litter size and lamb birth weight. Data were collected from 284 heads of ewes with first to fifth parity and raised at a state farm for three consecutive (2002)(2003)(2004) years. Teaser rams were used to monitor estrus twice daily in the morning and in the evening from September to October. BCSs and body weights (BWs) were recorded at mating and postpartum. The ewes, at mating time in breeding season and within first 6 h after the expulsion of fetal membranes, were divided into four groups on the basis of their BCS: thin (BCS = ≤ 2.0; n = 70; 38), medium (BCS = 2.5-3.0; n = 122; 142), fat (BCS = 3.5-4.0; n = 72; 59) and very fat (BCS = ≥ 4.5; n = 20;17). BCSs and BWs of ewes at postpartum were highly correlated with lamb birth weight (R = 0.486, P < 0.01, and R = 0.130, P < 0.05, respectively). BCSs and BWs of ewes at postpartum had positive effects on lamb birth weight (Y = 3.43 ± 0.10 + 0.130 + 0.047 ewe body condition score (EBCS), P < 0.01; Y = 2.92 ± 0.42 + 0.018 ± 0.009 ewe body weight (EBW), P < 0.05 kg of lamb birth weight per BCS and kilogram of ewe live weight, respectively). The fertility rate, litter size and fecundity were higher in the medium and fat groups than thin and very fat groups (χ 2 = 10.607, P < 0.01). The BW and BCS at postpartum affected gestation length positively (P < 0.05). Return rate or number of coitus for conception were higher (P < 0.05) in thin and very fat groups than medium and fat groups. The data revealed that the ewes with medium and fat body condition (BCS = 2.5-4.0) scores were profitable.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 99%

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Body condition status at mating affects gestation length, offspring yield and return rate in ewes

2018

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“…A detailed description of the animals, management and experimental design used for collecting the data employed in this study can be obtained from González-García et al (2015). We used the data belonging to the primiparous (PRIM) group, considering that they were individually fed.…”

Section: Methodsmentioning

confidence: 99%

“…Around each sampling date, ewes were individually weighed, BCS was assessed by trained observers using the 5-point scale proposed by Russel et al (1969) and a blood sample was taken before the first meal distribution for metabolic profile (i.e. plasma non-esterified fatty acids, NEFA; González-García et al, 2015). Here, we use data referring to the plasma concentration of NEFA, as an indicator of body reserves mobilisation.…”

Section: Methodsmentioning

confidence: 99%

Residual feed intake in dairy ewes: an evidence of intraflock variability

Gonzalez-Garcia

Santos

Hassoun

2019

Preprint

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6 7 8 a Abstract 9 This study examined the intraflock variability of feed efficiency in dairy ewes, through 1 0 monitoring residual feed intakes (RFI). Primiparous lactating ewes (n=43; 57.7±0.91 kg body 1 1 weight [BW] at lambing), representative of a French Lacaune dairy flock, were allocated in an 1 2 equilibrated 2 × 2 factorial design experiment, lasting for 63 days during mid-lactation and 1 3 combining 2 litter sizes (singletons, SING or twins, TWIN) and 2 daily milking frequencies (once, 1 4 ONE or twice, TWO). Ewes were individually fed a diet based on ryegrass silage, local hay and 1 5 supplements. Individual DMI was recorded daily and further used to evaluate (and compare) 1 6differences in RFI between ewes at 35, 42, 49, 56, 63, 70, 77, 84, 91 and 98 days relative to 1 7 lambing (DIM). Total (BW) and metabolic (BW 0.75 ) body weight, BCS, milk yield and plasma 1 8 NEFA were monitored weekly. Differences in DMI were mainly due to the lactation stage and 1 9

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