Publications Internationales

Permanent URI for this collectionhttps://dspace.univ-boumerdes.dz/handle/123456789/13

Browse

Author: search.filters.author.Mohammedi, ArezkiHas files: No

Search Results

Now showing 1 - 2 of 2
  • No Thumbnail Available
    Item
    Effect of heat stress on Apis mellifera intermissa and Apis mellifera sahariensis in laboratory controlled conditions: a physiological approach
    (Taylor and Francis Ltd., 2024) Khedidji, Hassiba; Chellali, Meriem; Cherrered, Nawel; Ghaffar, Intissar; Ladjali-Mohammedi, Kafia; Mohammedi, Arezki
    The effects of heat on honey bees have received attention in many subspecies. Nevertheless, some subspecies still remain unexplored. In this study, we investigate for the first time the effect of heat on two subspecies of honey bees endemic to Algeria, Apis mellifera intermissa which is adapted to the Mediterranean climate and Apis mellifera sahariensis, which is adapted to the hot climate of southwest Algeria. We tested the hypothesis that sahariensis is more tolerant to heat stress than intermissa. In two in-vitro tests, we reared workers of both subspecies at 4 temperatures (34 °C, 38 °C, 39 °C, and 40 °C). Then, we determined the hemolymph protein (HP) concentration, hypopharyngeal gland development (HPG), ovary development and survival. We found that the sahariensis had HPG more developed and less affected by heat than intermissa. Conversely, although intermissa had more (HP) at 34 °C, we found a significant increase in (HP) at 38 °C, 39 C° and 40 °C in intermissa than sahariensis. Although ovary development is greater in intermissa than sahariensis at 34 °C and greater at 34 °C than 38 °C, 39 °C and 40 °C, we did not record differences in ovary development between the subspecies at 38 °C, 39 °C, and 40 °C. Finally, in all conditions, sahariensis had a higher survival than intermissa.
  • No Thumbnail Available
    Item
    Dietary use of Rosmarinus officinalis and Thymus vulgaris as anticoccidial alternatives in poultry
    (Elsevier, 2021) Aitfella Lahlou, Radhia; Bounechada, Mustapha; Mohammedi, Arezki; Silva, Luís R.; Alves, Gilberto
    Coccidiosis is a parasitic disease caused by protozoa belonging to the genus Eimeria and whose propagation has a tremendous economic impact on poultry production. The parasite develops in the intestinal tract and causes disturbances in homeostasis that may lead to the death of the animal. Anticoccidial drugs and vaccination are the main preventive measures used against this disease. However, the rapid spread of drug resistance and the emergence of environmental pollutants have led to search other alternatives that do not hinder the health and productivity of broilers. The use of medicinal plants or plant-derived products could be one of these approaches; in fact, plants are reservoirs of bioactive compounds that could be developed as new chemical entities. Two members of the Lamiaceae family, Rosmarinus officinalis and Thymus vulgaris included in the Algerian pharmacopoeia have been reviewed herein, as well as their anticoccidial activity. We discuss their potential uses as natural growth promoters, referring their phytochemical constituents and biological properties that could play a crucial role in improving the symptoms caused by coccidiosis in poultry