Publications Scientifiques
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Item Feeding ecology of the vulnerable aoudad (Ammotragus lervia) in north-western Sahara(John Wiley and Sons Inc, 2023) Bounaceur, Farid; Benamor, Naceur; Bissaad, Fatima Zohra; Lasgaa, Faten; Baghadid, Sabah; Rezigua, Faiza; Aulagnier, StéphaneThe feeding ecology of the aoudad (Ammotragus lervia) was investigated for the first time in north-western Sahara, Djebel Antar (Bechar province, Algeria), from autumn 2015 to summer 2016. Microhistological analyses of faeces revealed an annual diet composed of 23 identified taxa belonging to 16 plant families. The highest species diversity was recorded in spring and summer (23 species), despite a marked consumption of two species: Vachellia tortilis (17.7%) and Avena sterilis (14.0%); diet diversity was lower in autumn and winter (16 species), including mainly Teucrium polium (14.7%, 21.0%) and Gymnocarpos decander (19.7%, 10.0%). The main plant parts consumed during these seasons were stems (77.7%, 65.3%), while leaves and inflorescences were mostly consumed during spring and summer (54.7%, 52.3%). Forbs dominated the aoudad's diet, with 46.3% average relative abundance, including mainly T. polium, Limoniastrum feei, and Chrysanthemum macrocarpum. Woody plants including mainly V. tortilis and G. decander accounted for 33.3% (50.0% in autumn), and grasses including A. sterilis and H. murinum for 20.4% (32.0% in summer). Based on this diet, A. lervia can be classified as a “generalist mixed-feeder.”Item Microorganisms associated with the North African hedgehog Atelerix algirus and its parasitizing arthropods in Algeria(Elsevier, 2022) Aouadi, Nawal; Benkacimi, Linda; Zan Diarra, Adama; Laroche, MaureenLaroche; Bérenger, Jean-Michel; Bitam, Idir; Parola, PhilippeHedgehogs are small mammals. They are potential reservoirs of various zoonotic agents. This study was conducted in Bouira, a north-central region of Algeria. A total of 21 Atelerix algirus corpses were picked up on roadsides and gardens. Hedgehog kidneys, spleens and ectoparasites were collected. Twelve hedgehogs were infested with ectoparasites, including Archaeopsylla erinacei, Rhipicephalus sanguineus s.l. and Haemaphysalis erinacei. Hedgehog organs and randomly selected arthropods were screened for microorganisms using molecular methods. Coxiella burnetii was detected in kidneys, spleens, A. erinacei, Hae. erinacei and Rh. sanguineus s.l. Leptospira interrogans was detected in kidneys. Rickettsia felis and Rickettsia massiliae were detected respectively in A. erinacei and in Rh. sanguineus s.l. DNA of an uncultivated Rickettsia spp. was found in Hae. erinacei. Wolbachia spp. DNA was detected in fleas. The DNA of potential new Bartonella and Ehrlichia species were found respectively in fleas and ticks. This study highlights the presence of DNA from a broad range of microorganisms in hedgehogs and their ectoparasites that may be responsible for zoonoses in AlgeriaItem Inhibitory effect of Trichoderma harzianum on mycelial growth of Fusarium oxysporum f. sp. radicis-lycopersici and Alternaria solani(Springer Netherlands, 2018) Lakhdari, Wassima; Dehliz, Abderrahmene; Mlik, Randa; Hammi, Hamida; Benlamoudi, Wiam; Acheuk, Fatma; Doumandji-Mitiche, Bahia B.Tomato is one of the most important fruit vegetables for human consumption in Algeria. In recent years, the cultivation of this plant is experiencing a very rapid development. However, this speculation is confronted with several problems including plant health. The purpose of this study is to find biological ways to introduce them into an integrated control program against tomato pests and have an organic agriculture that can increase the production of this culture. Direct confrontation test of an indigenous strain of Trichoderma harzianum with two phytopathogenic fungi that are isolated from tomato leaves (Fusarium oxysporum f. sp. radicis-lycopersici and Alternaria solani) was carried at 26 °C on an artificial culture medium (PDA). It could be demonstrated that T. harzianum inhibited mycelia growth of the two fungi with more than 40% and only after 4 days of incubation. Statistical analysis confirms that T. harzianum had a significant effect of antagonism against the tested pathogens mentioned before with P value 0.02 and 0.04, respectively. Beyond this period, and at the end of the sixth day, T. harzianum occupied the colonies of fungus and began to sporulate marking a very important myco-parasitic power. Indeed, a percent inhibition greater than 50% was recorded into the both fungiItem Association of oxalic and lactic acid for varroa control in Algeria August 2010(2010) Adjlane, NoureddineToday, the chemical control of Varroa with pyrethroids is difficult, as they are no longer effective. Thus, it is interesting to use natural products such as organic acids. Oxalic and lactic acid were used for the first time in Algeria on 30 colonies of Apis mellifera intermissa in Langstroth hives: A. 45 g of oxalic acid dehydrate dissolved 1 litre 50 % sucrose syrup B. 30 g of oxalic acid dehydrate dissolved 1 litre 50 % sucrose syrup C. Two applications with 5 ml 15 % lactic acid carried out by pouring the acid between the frames, with a 7 day interval Dead Varroa were counted during the trial period by means of greased bottom inserts covering the hive bottom two weeks after the use of the organic acids. The efficacy of the oxalic lactic acid depends on the presence of brood at the time of the treatment. Following efficacies were measured: Application A.: 82.6 %, application B: 65.5% and application C: 75.23 %. Organic acids must be considered as products for integrated Varroa control in AlgeriaItem Efficacy of Varroa destrcutor treatments in Algeria(2011) Adjlane, Noureddine; Jamal Haddad, NizarVarroa destructor was registered for the first time in Algeria in 1981 through the Algerian-Tunisian border to the east. Since then Algeria has approved the use of several products to control varroa, in order to minimize the impact of this parasite on the bee colonies and honey production. This experiment was conduted in order to study current effectiveness of varroa treatments registered in Algeria,varroa resistant to these treatments ,The trials were conducted in the region of Mitidja (central Algeria) on 75 hives spread over three apiaries. All colonies where equipped with a mesh tray with insert as a diaper greased roasting for counting dead mites. The control treatment is performed with oxalic acid drip; effectiveness was measured by comparing the mites killed during the experimental treatments to mites killed during a control treatment. The results showed a variation in efficacy between the treatments used Bayvarol saves the efficiency ratio is the most important (94.33%), followed Apistan and Apivar with 87.54% and 82.67% respectively. We note a decrease in the efficiency of these products, tests for resistance in vitro are needed to confirm this decline and to detect possible problem of resistance. Natural treatments based on thymol record the lowest with 79.34% for and 72.65% for Thymovar and Apigaurd. Thymol as Apiguard and Thymovar can be regarded as complementary therapies to be integrated into a control program because the success rate is low and thus the beekeeper is required to use an alternative treatment. The information obtained from this study concerning drug efficacy and resistance acaricides are essential for defining the control strategies adapted to the therapeutic treatment of Varroa disease in Algeria.Item Study of melliferous plants visited by the worker honeybee, Apis mellifera intermissa in Boumerdes, Algeria(Faculty of Agriculture, University of East Sarajevo, 2020) Belaid, Messaouda; Mohamedi, Arezki; Chahbar Adidou, Nora; Acheuk, Fatma; Abbad-Bennour, Malika; Ighil Ameur, AmelThis work allows to establish a list of melliferous plants visited by the worker bee, Apis mellifera intermissa in Boumerdes through melissopalynological analysis. Eight samples of honey were collected in summer from different regions of Boumerdes province in Algeria: Mizrana (H1), Tizéruine (H2), Tagdempt (H3), Sherraba (H4), Baghlia (H5), Boudouaou (H6), Sidi Daoud (H7) and Si Mustapha (H8). For the analysis, we adopted the classical method of Louveaux et al., (1970). The results obtained showed that the melissopalynological analysis indicated the pollen grains of Eucalyptus were numerous as more than 45% of the pollen in six (6) of the eight samples of Boumerdes (H1, H2, H3, H4, H7 and H8). The pollen of Hedysarum coronarium was dominant in the sample H5 (67.60%). In seven samples honey recognized multifloral by beekeepers, Eucalyptus and Citrus taxa were respectively super represented and underrepresented in the honey H7 (87.46%) and H6 (19.80%). Thus, the number of taxa listed in the honeys studied varies from 14 to 19. The total number of pollen grains counted for the 8 samples varied from 646 to 3580Item Occurrence of nosemosis in honeybee colonies Apis mellifera intermissa in the Mid-North of Algeria during 2011.(2012) Adjlane, Noureddine; Jamal Haddad, Nizar