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Chahbar N.,University of Boumerdes | Munoz I.,University of Murcia | Dall'Olio R.,Italian Agricultural Research Council | De la Rua P.,University of Murcia | And 2 more authors.
Journal of Insect Conservation | Year: 2013

Honey bee diversity is under threat due to anthropogenic factors as the use of pesticides and the replacement of local colonies to recover from colony losses. To assess the effect of these activities on the genetic diversity and structure of North African honey bee colonies, we studied colonies from the north (Tellian) and the south (Saharan) regions in Algeria, by determining their mitochondrial haplotype and the variation of ten microsatellite loci. Particular haplotypes have been found with a high frequency in each region that may constitute subspecies-specific markers for Apis mellifera intermissa (haplotype A8 at the north) and A. m. sahariensis (haplotype A9 at the south). Moreover, the presence of the haplotype A8 in some Saharan colonies may reflect recent introductions of A. m. intermissa. Structure analysis suggests that a natural differentiation between honey bee populations from Saharan and Tellian regions still exists despite increased colony movements (migration, queen purchases, etc.) during the last decades. One apiary established for the conservation of A. m. sahariensis showed no indication of maternal introgression since all the colonies bear the same haplotype A9. Furthermore, Hardy-Weinberg equilibrium observed in this population indicates that this apiary is appropriate for conservation programs of A. m. sahariensis. © 2012 Springer Science+Business Media B.V. Source

Daoudi A.,Ecole nationale superieure agronomique dEl Harrach | Terranti S.,Institute National Of Recherche Agronomique Rue Hacen Badi | Hammouda R.F.,University of Khemis Miliana | Bedrani S.,Ecole nationale superieure agronomique dEl Harrach
Cahiers Agricultures | Year: 2013

Inter-annual variability, which characterizes the climate of Northern Algeria, is accentuated by climate change. In the steppe, where agro-pastoral activities are strongly dependent on rainfall, the increase of rainfall variability augments the vulnerability of agro-pastoralists, particularly those weakly endowed with resources, and compromises reproduction of their farming systems. Faced with this situation, these agro-pastoralists develop different adaptation strategies. A study of crop-livestock production systems in two localities in the Wilaya of Laghouat, conducted between 2008 and 2010, found that those who remain on rangelands after droughts mobilize resources from business partners during wet years through different types of agrarian contracts. These contracts concern the keeping of livestock or partnerships in livestock and cereal production. Source

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