Factors affecting performance traits in Rambouillet sheep

SUDAN, VAAKRITI; Taggar, R. K.; Chakraborty, Dibyendu; Kumar, Dhirendra; Kumar, Narendra

doi:10.56093/ijans.v88i12.85807

Cited by 2 publications

(1 citation statement)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Various studies report that lamb birth weight is affected by the following factors: genetic factors (heterosis effect and breed) (Bancheva et al, 2022), non-genetic factors (production year (Kleemann et al, 1990;Mellado et al, 2016;Sudan et al, 2018;Sveinbjörnsson et al, 2021), lamb birth type (Sudan et al, 2018;Bancheva et al, 2022), weight and body condition of ewes (Kleemann et al 1990;Bancheva et al, 2022), lamb gender (Mellado et al, 2016;Sudan et al, 2018;Bancheva et al, 2022), litter size (Hinch et al, 1985;Kleemann et al, 1990;Mellado et al, 2016) weight of ewes at pairing (Hinch et al, 1985), inbreeding (Alsheikh, 2005), Ewes' feeding (Bancheva et al, 2022), herd (Baneh and Hafezian, 2009), season of lambing (Mellado et al, 2016). Similar to many studies in Akkaraman sheep, this study found that environmental factors such as ewe's age Noyan and Ceyhan, 2021;Aksoy et al, 2023), birth type (Aktaş and Doğan, 2014;Ceyhan et al, 2019;Sakar and Erişek, 2019;Noyan and Ceyhan, 2021;Sakar and Ünal, 2021;Aksoy et al, 2023;Tüfekci, 2023), and birth year (Ceyhan et al, 2019;Behrem, 2021;Noyan and Ceyhan, 2021;Aksoy et al, 2023;Tüfekci, 2023) significantly affected birth weight in Akkaraman lambs.…”

Section: Birth Weightmentioning

confidence: 99%

Evaluation of Some Reproductive Performance of Ewes, Livability and Growth Traits of Lambs of Akkaraman in Breeder Flocks in Niğde/Bor Province

Aksoy,

Şekeroğlu,

Duman

2023

Turkish JAF Sci.Tech.

View full text Add to dashboard Cite

Conducted within the National Sheep and Goat Breeding “subproject: Akkaraman Sheep Breeding Project under farmer conditions in Nigde’s Bor district” between 2018 and 2022, the current study evaluated the reproductive characteristics of ewes as well as the livability and growth traits of lambs. This study investigated some ‘reproductive traits’ of an average of 6000 ewes per year and ‘growth performance and ‘survival traits’ of a total of 30051 head lambs. The birth weight (LBW), 60th-day body weight (BW60), 120th-day body weight (BW120), and 120th-day body weight gain (BWG120) of Akkaraman lambs during the study periods were 4.14±0.19 kg, 18.58±0.03 kg, 31.31±0.02 kg, and 246±2.23 g/lamb/day, respectively. In the study, among the factors affecting the growth characteristics of Akkaraman lambs, only the effect of gender on BWG120 and birth type on BW120 was found to be insignificant. In contrast, the other factors were found to be found to be statistically significant. In the study, it was determined that the number of lambs per Akkaraman ewe giving birth between 2018-2022 varied between 1.03-1.10. The highest livability in Akkaraman lambs was determined in 2018 (96.61%) and the lowest in 2020 (83.21%). As a result, it was found that liveability in Akkaraman lambs was dependent on birth year, the age of the ewe, gender, and birth type.

show abstract

Section: Birth Weightmentioning

confidence: 99%

Evaluation of Some Reproductive Performance of Ewes, Livability and Growth Traits of Lambs of Akkaraman in Breeder Flocks in Niğde/Bor Province

Aksoy,

Şekeroğlu,

Duman

2023

Turkish JAF Sci.Tech.

View full text Add to dashboard Cite

show abstract

The effect of repeated lipopolysaccharide endotoxin challenge on immune response of breeding ewes and subsequent lamb performance

Austin,

Castro,

Ochoa

et al. 2024

Journal of Animal Science

View full text Add to dashboard Cite

Infectious disease caused by exposure to Gram-negative bacterial endotoxin lipopolysaccharide (LPS) is recognized to suppress female fertility. However, the effect of varying low dose endotoxin exposure during distinct stages of follicle development on immune response, reproductive performance and lamb performance has yet to be elucidated. Therefore, the objective of this study was to evaluate acute phase response, mRNA abundance of inflammatory markers, reproductive performance and lamb growth characteristics of ewes challenged with subclinical doses of LPS. Rambouillet ewes (n = 36; 68.2 ± 1.1 kg; age 3 to 7 yr) stratified by body weight and age were assigned to treatment groups. Ewes received subcutaneous injections of saline (CON, n = 12), 1.5 μg/kg BW LPS (LOW, n = 12), or 3.0 μg/kg BW LPS (HIGH, n = 12) on d 5, 10, and 15 of a synchronized follicular wave. Ewes were subsequently placed with a raddle-painted ram on d 16 for a 35-d breeding season. On treatment d 5 and 15, blood samples, peripheral blood leukocytes, and rectal temperature were collected before and at regular intervals for 12 h after LPS challenge. Immune response to LPS was confirmed by increased temperature and serum cortisol concentrations on d 5 and 15. Endotoxin increased circulating plasma concentration of the acute phase protein, haptoglobin by greater than 15%, in both LPS-treated groups on d 5 and 15 at 12 h compared with control (P ≤ 0.05). Pro- and anti-inflammatory mRNA gene expression demonstrated no differences in expression for tumor necrosis factor α or peroxisome proliferator-activated receptor gamma among treatment groups (P > 0.10). Likewise, toll-like receptor 4 (TLR4), interleukin-8 (IL-8), and superoxide dismutase 2 (SOD2) expression was similar among treatment groups on d 5. However, ewes challenged with LPS on d 15 displayed greater mRNA expression for TLR4 from 2 to 6 h (P < 0.05), a 7-fold increase for IL-8 from 1.5 to 2.5 h (P < 0.05), and 8-fold induction for SOD2 from 2 to 6 h (P < 0.05) as compared with controls. First service conception rates were 90% for control ewes and 75% for both treated groups (P = 0.84). Treated ewes demonstrated a reduction in lamb birth weight compared with controls (P ≤ 0.05) and a tendency for reduction of 60-d adjusted weaning weight (P = 0.09). Data suggest that subacute endotoxin exposure aligning with key follicle and oocyte maturation events results in detrimental growth performance of the subsequent lamb.

show abstract

Factors affecting performance traits in Rambouillet sheep

Cited by 2 publications

References 7 publications

Evaluation of Some Reproductive Performance of Ewes, Livability and Growth Traits of Lambs of Akkaraman in Breeder Flocks in Niğde/Bor Province

Evaluation of Some Reproductive Performance of Ewes, Livability and Growth Traits of Lambs of Akkaraman in Breeder Flocks in Niğde/Bor Province

The effect of repeated lipopolysaccharide endotoxin challenge on immune response of breeding ewes and subsequent lamb performance

Contact Info

Product

Resources

About