RIHAB NADIA Sahnoune
نادية رحاب سحنون
rihab.sahnounenadia@univ-msila.dz
673595370
- Departement of Agricultural sciences
- Faculty of Sciences
- Grade PHd
About Me
Location
Msila, Msila
Msila, ALGERIA
Code RFIDE- 1998-12-14 00:00:00
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RIHAB NADIA Sahnoune birthday
- 2025-11-15
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2025-11-15
Physiological response of Rembi sheep to folic acid supplementation in the semi-arid climate of Mostaganem
The limited availability of forage resources due to climatic conditions restricts the intake of essential nutrients, particularly vitamins. These deficiencies can affect the health and reproduction of ewes. Vitamin supplementation is therefore aneffective strategy for supporting metabolic and hormonal function, particularly vitamin B9 (folic acid), which is involved in nucleic acid synthesis and hormone regulation. The Mostaganem region, part of Algeria semi-arid basin, is characterized by a climate marked by low rainfall and limited availability of forage resources. These conditions restrict the quality of sheep feed and can compromise their health and reproduction. In this context, vitamin supplementation is an effective strategy for compensating for nutritional deficiencies and supporting metabolic and hormonal function, particularly through vitamin B9 (folic acid), which is involved in nucleic acid synthesis and the regulation of gonadotropic hormones. in this context, a study was conducted in April 2024 in the mild semi-arid region of Mostaganem to evaluate the effect of vitamin B9 supplementation on plasma folate concentrations in Rembi sheep. Twenty healthy adult ewes with an average body condition score of between 2.5 and 3 were divided into two homogeneous groups of 10 animals. The first group served as a control group and received only the basic feed ration, while the second (F.A.group) received the same ration, supplemented with 150 mg/day/head of vitamin B9. Blood samples were taken at six successive time points to monitor hormonal changes over time. Statistical analysis using Origin Lab 2024 revealed a highly significant effect of treatment between the two groups at all time points . The mean values of B9 were consistently higher in supplemented ewes, particularly at time points 3 and 4, where the difference reached (-2.114 and -2.832) units compared to the control. In the control group, no significant variation was observed between the different time points (p < 0.05), indicating stability. In contrast, the supplemented group showed several significant differences between times, particularly between (T1–T3, T1–T4, T2–T4, T3–T6, T4–T6) (p < 0.01), reflecting a progressive stimulation of ovarian activity under the effect of B9. These results suggest that vitamin B9 has a positive effect on the hormonal dynamics of Rembi ewes
Citation
Rihab Nadia SAHNOUNE , Samia HAFFAF , ,(2025-11-15), Physiological response of Rembi sheep to folic acid supplementation in the semi-arid climate of Mostaganem,17th International Veterinary Science Days SUSTAINABLE & OPTIMIZATION OF SHEEP & CATTLE VALUE CHAINS IN ALGERIA: STRATEGIES & CHALLENGES,Higher National Veterinary School - Rabie Bouchama
- 2025-04-07
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2025-04-07
ÉTUDE DE L’INFLUENCE DES PRATIQUES D’ELEVAGE SUR LA REPRODUCTION OVINE.
La gestion efficace de la reproduction ovine est un facteur clé pour améliorer la productivité des élevages misent en jeu plusieurs paramètres qui influencent le calendrier reproductif des brebis Dans ce contexte, des enquêtes ont été réalisé dans la région de Mostaganem au niveau de 40 exploitations ovines visent à analyser l’impact de l’âge de la puberté et le poids sur l’âge réel de mise à la reproduction. L’analyse de régression multiple a révélé que le poids à la mise à la reproduction est un facteur significatif (p < 0,0001) influençant positivement l’âge de mise à la reproduction, avec un coefficient de 0,435. Cela signifie qu’une augmentation du poids entraîne un retard dans l’âge de mise à la reproduction. En revanche, l’âge de puberté ne présente pas d’effet significatif (p = 0,61), suggérant qu’il n’explique pas de manière notable la variabilité observée. L’évaluation du coefficient (R²) montre que le poids avec une moyenne de 23.75 ±0.96 (kg) explique 66 % de la variabilité de l’âge de mise à la reproduction, reste généralement inférieure au seuil recommandé ≥30 kg, en revanche l’âge était relativement bien respecté avec une valeur moyenne de 11.4±0.5 (mois). Ces résultats peuvent être liés fortement à une alimentation déficitaire ou mal équilibrée, où les brebis atteignent l’âge requis sans avoir un développement pondéral suffisant. Ces conclusions permettent d’orienter les pratiques d’élevage vers une stratégie alimentaire basée sur le poids pour une meilleure planification reproductive, vu que l’âge de puberté seul ne semble pas être un indicateur fiable. Mot clé: Reproduction- Brebis- Puberté –Poids- Alimentation.
Citation
Rihab Nadia SAHNOUNE , Samia HAFFAF , ,(2025-04-07), ÉTUDE DE L’INFLUENCE DES PRATIQUES D’ELEVAGE SUR LA REPRODUCTION OVINE.,Premier Séminaire National (Hybride): Eau, Santé et Développement durable-ESDD1,l'Université de Batna
- 2025-02-10
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2025-02-10
La 1 ère journée doctorale sur les sciences de la nature,de l'agriculture et de l'environnement (JDSNAE)
Sheep production and reproduction occupy an essential place in animal biology, as they have a direct influence on the sustainability of farms. Reproduction conditions the renewal of generations and the improvement of productive performance, particularly in terms of fecondity and viability of lambs. In this context, a study was carried out in the Mostaganem region. In April 2024, thirty healthy Rembi ewes with NEC (2.5-3) were divided into two groups of 15 ewes each: the first synchronized with vaginal sponges (20 mg) for 14 days, the second subjected to the same protocol with folic acid supplementation (150 mg/day/head). On the day of sponge removal, PMSG injections (500 units) were administered to both groups. Blood samples were taken from the jugular vein to assess plasma folate concentration using the chemiluminescence technique on the following days: D-21, D-15, D-8 and D0 (D0 corresponding to the day of mating). Gestation was monitored one month after mating to assess pregnancy rates. After statistical analysis, the results show an increase in B9 averages in parallel with supplementation for group G2:(D-20 =2.13 ± 0.12/ D-15 = 2.53 ± 0.12/ D-8 = 3.06 ± 0.19/D0 = 3.67 ± 0.17) ng/ml. On the other hand, more or less decreasing values were observed for the G1 group: (D-20 = 0.98 ± 0.11/ D-15 = 0.91 ± 0.10/ D-8 = 0.74 ± 0.08/D0 = 0.69 ± 0.08) ng/ml. Pregnancy rates were 100% for ewes in group G2, compared with 70% for those in group G1, suggesting a significant positive effect of folic acid supplementation. This supplementation helps to improve egg quality, increasing the chances of fertilization while reducing the risk of early embryonic loss. The incorporation of vitamin B9 into ewe feed is proving to be a key to optimizing the productivity of sheep farms by improving the reproductive performance of ewes.
Citation
Rihab Nadia SAHNOUNE , Samia HAFFAF , Meryem KHELFALLAH , ,(2025-02-10), La 1 ère journée doctorale sur les sciences de la nature,de l'agriculture et de l'environnement (JDSNAE),Study of fecondity improvement in ewes in semi-arid regions,Université Yahia Fares Médéa
- 2024-11-13
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2024-11-13
STUDY OF THE IMPACT OF VITAMINE SUPPLEMENTATION ON REPRODUCTIVE SERUM LEVELS OF SYNCHRONIZED EWES IN OFF-SEASON.
The synergy between reproductive biotechnology, with the synchronization and induction of heat during seasonal anestrus by hormone treatments and vitamin supplementation, makes it possible to balance rationing and optimize reproductive performance and productivity in sheep farming. A study carried out in the Mostaganem region in April 2024. Thirty healthy Rembi ewes with good NEC (2.5-3) were divided into two groups of 15 ewes: the first was synchronized with vaginal sponges (20 mg) for 14 days. The second group followed the same protocol, with vitamin B9 supplementation of 150 mg/day/head. Blood samples were taken via the jugular vein 24 hours after sponge removal and PMSG injection, to measure plasma FSH and LH concentrations using the chemiluminescence technique. After statistical analysis, mean FSH and LH concentrations for G1 were 1.93 ± 0.19 and 0.24 ± 0.05 mIU/ml respectively, while for G2 were 2.61 ± 0.19 and 0.26 ± 0.04 mIU/ml. These results indicate that the difference is not significant for LH levels . On the other hand, a highly significant difference for FSH levels, confirming that this variation can be explained by a better stimulation of ovarian follicles, favored by B9, leading to higher FSH levels. On the other hand, the low LH levels may be due to the fact that this hormone has a very short peak, and probably didn't coincide with the blood sampling period. These results highlight the role of folic acid in improving follicular function in ewes and could have significant implications for optimizing reproduction and productivity .
Citation
Rihab Nadia SAHNOUNE , Samia HAFFAF , HOCINE Guermah , ,(2024-11-13), STUDY OF THE IMPACT OF VITAMINE SUPPLEMENTATION ON REPRODUCTIVE SERUM LEVELS OF SYNCHRONIZED EWES IN OFF-SEASON.,First National Forum on Biosciences, Biotechnologies and Biodiversity (NFBBB’24),HASSIBA BENBOUALI UNIVERSITY OF CHLEF /FACULTY OF NATURE AND LIFE SCIENCES
- 2024-10-16
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2024-10-16
Etude de l'émergence des maladies métaboliques d'origine nutritionnelle chez les élevages ovins en climat semi-aride .
Les maladies métaboliques nutritionnelles chez les ovins sont des troubles physiologiques résultant de déséquilibres alimentaires. Elles se produisent principalement en raison d'une alimentation inappropriée ou mal équilibrée, entraînant des carences, des excès ou des déséquilibres en nutriments essentiels tels que les hydrates de carbone, les protéines, les minéraux ou les vitamines. Cette étude présente les résultats d'une vaste enquête de 5 mois (de novembre 2023 à avril 2024) auprès de 100 élevages ovins dans la wilaya de Mostaganem qui partage de plus en plus de caractéristiques climatiques avec les zones steppiques d’Algérie, l’évolution climatique vers un climat semi-aride similaire à celui des zones steppiques place ces deux régions sous des conditions environnementales quasi identiques. Par conséquent, les résultats observés chez les troupeaux ovins, en termes de production et de santé. Ce travail a été réalisé dans le but d'identifier les pathologies métaboliques liées à l'alimentation, en particulier aux déficits ou excès d'apports en nutriments par rapport aux besoins des brebis en fonction de l'âge, du poids et du stade physiologique. Après une analyse statistique multivariée des données collectées, les résultats montrent que l'hypocalcémie est la maladie la plus fréquente, affectant 80 % des élevages. L'acidose lactique, souvent causée par des changements soudains dans l'ingestion d'aliments, était présente dans 76 % des élevages, La cétose, autre maladie liée à un déséquilibre énergétique, touche 64 % des exploitations. La tétanie d'herbage a été observée dans 36 % des fermes. La lithiase urinaire et l'entérotoxémie sont moins fréquentes, respectivement 10% et 5% des élevages. Ces résultats révèlent des lacunes dans la gestion des troupeaux et soulignent l'importance d'une bonne alimentation pour prévenir les maladies métaboliques. Une gestion attentive de l'alimentation est cruciale. Mots clés : Semi-aride, ovin, alimentation, maladies métaboliques, changement climatique.
Citation
Rihab Nadia SAHNOUNE , Samia HAFFAF , HOCINE Guermah , ,(2024-10-16), Etude de l'émergence des maladies métaboliques d'origine nutritionnelle chez les élevages ovins en climat semi-aride .,2 éme Séminaire National Sur l'Agropastoralisme (SNAP-2),Centre de Recherche en Agropastoralisme (CRAPAast-Djelfa)
- 2022-09-01
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2022-09-01
Study of fecundity parameters of dairy cows in the region of Mostaganem in Algeria
Objective: The objective of this study is to take stock of the reproductive performance of cows with the aim of making it profitable. We are studying cattle breeding, and trying to see if it meets internationally accepted standards. Methods: A data study was carried out from the period from February to September 2021, in order to collect and analyze data on: the Calving Interval (InC), the Calving Interval-Fertilizing Insemination (InC-FI) and the Calving Interval-first Insemination (InC-1I). Data from nine farms in the Mostaganem region, in our study area, were used, on dairy cows (n=217). Results: The analysis of the active component allowed us to know that none of the nine farms studied correlates with the accepted norms, from Henzen, Gayrard and Hagen, except farm 02 (n=11). The mean of the farms (n=217) studied in Mostaganem is much closer to the results of Bensalem than the other results obtained by Zineddine, Henzen or Gayrard and Hagen. Only 20% of cows had a calving interval of less than 366 days, while 50% of the dairy cattle studied have an interval between calving exceeding 392 days. A percentage of 30% for farms where the calving-mating interval is between 82 and 104 days and only farm 02 meets the standards.The analyzes of variance showed that the rank of lactation has no significant effect on the first insemination (p=0,40) as well as the first fertilizing insemination (p=0,10). However, the calving interval was considered significant in the three farms studied in relation to the lactation rank (p=0.03). Conclusions: The evaluation of the fertility parameters of the dairy cattle herd, allowed us to obtain averages which exceed, in the majority of farms, widely accepted standards; these results are mainly linked to the poor management of the reproduction of the cattle herds of the farms in question, which directly influences these studied parameters. Keywords Reproductive performance; Fecundity; Calving interval; Bovine insemination
Citation
Rihab Nadia SAHNOUNE , Litim Miloud, Nazerag Narjes Sabrina, Barka Mohamed, , (2022-09-01), Study of fecundity parameters of dairy cows in the region of Mostaganem in Algeria, Agricultural and Biological Research (AGBIR), Vol:38, Issue:6, pages:379-385, Dr. Junzheng Yang, MD, PhD Department of biotechnology Xinjiang University, China