Adjlane N.,Mhamed Bougara University of Boumerdesm |
Haddad N.,National Center for Agricultural Research and Extension |
Tarek O.,Institute Technique des Elevages
Acarina | Year: 2013
Varroa mite has become a major concern of beekeepers in Algeria since the discovery of the first cases of infestation in the year 1982. The objective of this study was to test different registered chemicals aside with those prepared by beekeepers. The experiment was conducted on 50 Apis meliffera intermissa colonies in a commercial apiary and kept in standard Langstroth hives. Among the products which are approved in Algeria and tested in our experiment are Bayvarol which recorded the highest efficiency rate (91.62%), followed by Apivar (86.50%) and then Apistan (77.75%). Traditional preparations treatments had very low efficiency where it was only: 39.37% for amitraz and 44.21% for tau-fluvalinate (Mavrik). Our study showed a reduction in the efficiency of commercial products (Apistan, Bayvarol and Apivar) and a very low efficiency for amitraz and Mavrik. Such results prove the high demand of searching for more effective treatments against Varroa. © Acarina 2013.
Ouachem D.,University of Batna |
Soltane M.,University of El-Tarf |
Dehimi A.,Institute Technique des Elevages |
Meredef A.,Ferhat Abbas University Setif |
Belhadj S.,University of Batna
Livestock Research for Rural Development | Year: 2012
The consumption of clay by livestock often called by the term geophagy is a natural phenomenon; they actually consume some clay during the pasture or by nibble seeds and insects in the soil fauna. In recent years, the use of clays as a natural alternative to the antibiotics growth promoters in poultry and pig was accompanied by a significant improvements in digestive efficiency, growth performance and the welfare. However, in ruminants, there was an insufficient scientific review. The aim of this study is to provide additional information about the responses of suckling goat to the clay addition. For this purpose, during the last month of pregnancy and 7 weeks after parturition, the effects of 5% of marl (a clay enriched with calcium salts) on the dry matter voluntarily intake, the birth weight and the growth rate of kids and milk production were studied in two groups of multiparous local goats. These goats were fed on a based diet of oat hay and alfalfa, distributed ad libitum and supplemented with a concentrate containing 5% of marl (experimental) or without marl (control). Results of this trial showed that the marl significantly improves birth weight and especially the single births (9.5%, P = 0.02), the weight gain (+ 49%, P <0.001) and the protein content of milk (+15%, P = 0.04). These performances seem to be partially explained by the increase of the dry matter voluntarily intake during the last month of pregnancy (+ 5%) and by the milk proteins richness. The response observed in this experiment shows the importance of the use of marl to improve food production and the rearing of goats in Algeria.
Mourad L.,University of Laghouat |
Safia T.,British Petroleum |
Soraya B.,Institute Technique des Elevages |
Toufik M.,Ferhat Abbas University Setif
European Journal of Scientific Research | Year: 2011
The objective of our work was to study the dynamics of body condition on the evolution of the performances of Prim'holstein dairy cows in a cattle breeding in northern Algeria. A total of 22 dairy cows were followed over a period of one year. The highest milk yield performances (quantity produced) were observed in cows with a body condition score (BCS) >3 at drying off and calving. Cumulative milk production (kg) at the first month of lactation is higher in cows with a BCS at drying period is >3 compared to the ones which the BCS is ≤3(609±24 vs 519±24); furthermore, it is more important at peak of lactation in cows with BCS at calving is >3points compared to those with a BCS is ≤3 (619±25 vs 523±21). The modest use of body reserves in early lactation (BCS of 2.45±0.61 in the 60th day postpartum compared to 3.28±0.48 at parturition) is the result of low needs for milk production (16.04±3.67 liters at the peak), reflecting the limitations imposed by the breeding environment for the expression of genetic potential. © EuroJournals Publishing, Inc. 2011.
Halbouche M.,University of Mostaganem |
Didi M.,University of Mostaganem |
Bourezak N.,Institute Technique des Elevages |
Lamari S.,University of Mostaganem
European Journal of Scientific Research | Year: 2010
We have measured the reproductive performance and growth in 2 tests conducted with 640 reproductive guinea fowls, and 66 guinea fowl breeder chicks. In the reproductive guinea fowls led in cages, the number of eggs laid was 107, with a maximum of 21 eggs/month. The intensity of laying started at 5% at the 37th week (W37) to 71% in W61, and decreased to 25% at W77. Weight of eggs varied between 41 and 43.7 g. The fertility rate was 74± 12%, with a hatchability of 73± 14% and live weight of birds hatched of 26.1 g. Compared to the batch led to soil, guinea fowl in cages performed their food consumption (-19 g/d), the number of eggs (34 eggs), egg weight (2.6 g) and mortality (-14.9%). The laying cycle has been extended by 9 weeks. The live weight of breeder guinea fowl was 1.008 kg at 90 days, with a DWG of 12.5 g and a CI of 4.05. The Barley diet has decreased food consumption (-46 g/d) without significant impact on the LW (-62 g), and improved a better feed efficiency compared to maize diet.
Reproductive performance of local breed of Algerian rabbits raised in experimental station [Evaluation des performances zootechniques de reproduction des lapines de population locale algérienne élevées en station expérimentale]
Fellous N.,Institute Technique des Elevages |
Reguig K.B.,University Djilali Liabes |
Baziz H.A.,British Petroleum
Livestock Research for Rural Development | Year: 2012
The purpose of our project was to study the reproduction performance of local breed of rabbit, in order to determine the parameters which are susceptible of genetic improvement to select and to develop an improved rabbit as a long term objective. The study was conducted on fifty female rabbits of local breed, at the west experimental station (Lamtar) of the Technical Institute of Breeding (I.T.E.L.V). Our experimental protocol consisted to follow the reproductive performances of these females on six litters, with an interval of twelve days of kindling-mating and weaning at 35 days. The rate of fertility and weaning were respectively 79.7 and 87.8% with an interval of 48.8 days between two kindling. The prolificacy rose to 7.98 totals born, 7.59 born alive, 6.67 weaned per litter and 37.1 rabbits weaned per female. The average weights recorded at birth and at weaning of the young rabbit were respectively 52.1 g and 650 g. Mortality rates were 5.02% for the stillbirth and 12.2% between birth and weaning. Parity showed no effect on the parameters studied except for fertility and interval between kindling.