Variations saisonnières des performances de reproduction des brebis Ouled Djellal dans la région de Chlef, Algérie

Zidane, Azdinia; Taherti, Mourad; Gadouche, Leila; Metlef, Sarra; Ababou, Adda

doi:10.19182/remvt.36801

Cited by 4 publications

(3 citation statements)

References 10 publications

(6 reference statements)

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“…The total fertility rate in this study was lower compared to that of (Chellig 1992) in a similar sheep breed (100%), with a difference of 22% compared to our results and the rates recorded in Ouled Djellal breed described by (Dekhili, 2004) in Setif region, where the average was 92% and those of (Arbouche et al 2013) which was 88% with a difference of 14% and 10% respectively.Our findings are consistent with the 75% fertility rate reported by (Zidane et al 2021) in the Ouled Djellal sheep breed in the Chlef region of the semi-arid western Algerian Highlands. On the other hand, (Mefti Korteby et al 2017) reported a fertility rate of 83% with a difference of 5%.…”

Section: Fertilitysupporting

confidence: 92%

Influence of Region on Some Reproductive Parameters in Ouled Djellal Sheep

Mohammed,

Gherissi,

Moussa

et al. 2023

JITV

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The present study aims to assess the reproductive performance of Ouled Djellal ewes at four different Biskra locations: El Hadjeb, SidiOkba, Ouled Djellal, and Chaiba.Â All flocks were kept under extensive management.Â For this study, 357 clinically healthy and non-pregnant Ouled Djellal ewes have been used.Â Mating was practiced in an accessible mode, conducted over two months: May and June 2015 (61 days) for all herds. Â The total number of lambing ewes and lambs in all flocks was determined during the lambing period. We compared fertility, fecundity, and prolificacy rates using the Ï‡2 test to verify the relationshipbetween the measured rates and the four sites and multiple comparisons that revealed significant differences.Â The variables assessed in this study encompassed fecundity, prolificacy, and fertility.Â The overall mean values obtained were 78% for fecundity, 117% for prolificacy, and 92% for fertility. These averages were significantly lower than those observed in intensively managed herds. Â However, the lowest rates were recorded at site 4 (Chaiba), with65% for fertility, 109% for prolificacy, and 71% for fecundity.Â The results of this study clearly show that the region has a significant effect on fertility (P= 0.001) and fecundity (P= 0.0001) but no significant effect on the prolificacy rate (P= 0.074).

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Section: Fertilitysupporting

confidence: 92%

Influence of Region on Some Reproductive Parameters in Ouled Djellal Sheep

Mohammed,

Gherissi,

Moussa

et al. 2023

JITV

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“…The average fertility rate of 78,8% observed for the Hamra breed was overall low compared with that obtained in our study for the Rumbi breed with 87,14%. According to (Zidane et al, 2021), the maximum fertility rate observed in the Ouled Djellal breed of 88% is similar to that of the Rumbi breed. Moreover, these rates obtained remain far from the reproduction objectives in sheep farms which are 95% (Heinrichs and Radostits, 2001).…”

Section: Discussionmentioning

confidence: 70%

Comparative study of the reproductive and growth performances of the Hamra and Rumbi ovine breeds

MEDDAH,

Belabdi,

de Almeida

et al. 2024

Preprint

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Growth and reproductive performance traits are important economic indicators for analyzing the overall performance of breeding systems. This study aims to evaluate the comparative performance of two Algerian sheep (Rumbi and Hamra) in terms of growth and reproductive performance, and the effect of factors such as breed, season of birth, mode of birth, dam weight and age on this performance in a semi-intensive breeding system. The reproductive performance of 577 Rumbi ewes and 1328 Hamra ewes bred at the Tiaret and Saïda experimental stations respectively, was analyzed using performance monitoring data. Fertility rates for the Rumbi and Hamra breeds of 87.14% and 78.8% respectively were practically similar (p > 0.05). Litter size at birth and weaning was significantly greater in the Hamra breed than in the Rumbi breed (p < 0.05). Analysis of variance of factors (year, season of birth, and age of mother) on reproductive performance in the Hamra breed had a significant effect on reproductive performance (p < 0.05). Weaning mortality was significantly higher in the Hamra breed than in the Rumbi breed, with an average of 22.60% versus 14.94% (p < 0.05). The results of this study showed that Rumbi lambs were heavier at birth than Hamra lambs. The values observed were 4.86 kg versus 3.10 kg for the Hamra breed, with a highly significant difference (p < 0.0001), so the average daily weight gains before weaning of Rumbi lambs were higher than those of Hamra lambs, at 0.195 kg/day versus 0.113 kg/day for Hamra lambs, with a high significance (p < 0.0001). According to the findings of this study, the Hamra breed had superior reproductive potential and the Rumbi breed had superior growth. Consequently, these results could be used for selective sheep breeding, taking into account the random effects of the environment and the potential of each breed.

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“…In different production systems, breeding profitability expressed by productivity is a major concern of sheep farming worldwide (Belhadia et al, 2020;Zidane et al, 2021). Its improvement constitutes an important objective for the ovine meat production industry.…”

Section: Introductionmentioning

confidence: 99%

Utjecaj sezone parenja i stanja tijela na zootehničke parametre ouled djellal ovaca u polupustinjskim područjima

Taherti,

Ait Isad,

Mimoune

2024

Vet. stn. (Online)

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In this study, a database was created by monitoring 3000 Ouled Djellal ewes, belonging to ten breeding farms and representing two modes of reproduction management. The data collected make it possible to measure the reproductive performance of females and to determine the influence of non-genetic factors on different parameters. The Body Condition Score (BCS) was calculated to compare performance in relation with breeding conditions. The results showed that fertility and prolificacy accounted for 91.1±0.1% and 116.4±0.2% in the reproduction mode respectively based on one lambing/year with exclusive spring control, and of 53.5±0.2% and 101.2±0.1% respectively in the traditional lambing system spread overthe year (with the ram permanently present in the flock) (P<0.05). The BCS varied according to mating season and feeding system. Indeed, as the BCS at mating increased, fertility, prolificacy and productivity improved. Ewes whose BCS at mating was equal to or greater than 3 obtained the best performance, while those with a lower BCS were less fertile, less prolific, and less productive. The average productivity of Ouled Djellal sheep was 107.0±0.1%, and 54.8±0.3%, respectively, in the first and second mode of reproduction management (P<0.05). This study highlights the main sources of variations and their interactions.

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Variations saisonnières des performances de reproduction des brebis Ouled Djellal dans la région de Chlef, Algérie

Cited by 4 publications

References 10 publications

Influence of Region on Some Reproductive Parameters in Ouled Djellal Sheep

Influence of Region on Some Reproductive Parameters in Ouled Djellal Sheep

Comparative study of the reproductive and growth performances of the Hamra and Rumbi ovine breeds

Utjecaj sezone parenja i stanja tijela na zootehničke parametre ouled djellal ovaca u polupustinjskim područjima

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