Time filter

Source Type

Saint-Pierre-du-Chemin, France

Zerrouki N.,Mouloud Mammeri University | Lebas F.,Cuniculture | Gacem M.,Rabbit Specialist | Meftah I.,University Djilali Liabes | Bolet G.,French National Institute for Agricultural Research
World Rabbit Science | Year: 2014

The aim of this study was to compare the production of a synthetic line (Syn) of rabbits to that of 2 local Algerian populations (W and Loc). The Syn line was obtained from the crossbreeding of a well adapted local population frequently used in Algerian familial farms (Loc) with a more productive French strain. The W population is maintained by a public cooperative and is used mainly in Kabylia region; it is called "white" because of its albino phenotype. Rabbits were placed under the same experimental conditions in 2 rabbitries of a state technical institute. In Baba Ali (Algiers), 50 does of each genotype were raised during 2 yr. In Lamtar (Sidi Bel Abbes), 30 does of the Syn line and 30 of Loc population were compared during 16 mo of production. Natural mating was used 10-11 d after parturition. Kits were weaned at 33-35 d. Litter size and litter weights were measured at birth and weaning. In both locations Syn dams were heavier than those of the other genotypes: (3616, 3464 and 3305 g for Syn, W and Loc in Baba Ali, and 3592 and 3173 for Syn and Loc in Lamtar; P<0.001). The observed litter sizes showed a superiority (P<0.001) of the Syn line compared to W and Loc does at birth time (8.76, 6.78 and 6.19 for Syn, W and Loc in Baba Ali, and 8.02 and 5.90 for Syn and Loc in Lamtar) and at weaning (6.85, 5.83 and 5.44 for Syn, W and Loc in Baba Ali, and 6.61 and 5.15 for Syn and Loc in Lamtar; P<0.001). Most probably as a consequence of the important difference in litter sizes, average individual weight at weaning was weaker for the synthetic line than for the Loc population: 543 vs. 563 g in Baba Ali and 561 vs. 621 g in Lamtar. For the W population in Baba Ali, the weaning weight was similar to that of the Loc population: 565 vs. 563 g. There were no genotype×season interactions which changed the genotypes ranking, and the Syn line performances were more regular from one season to the other than those of the 2 other genotypes. This means that the synthetic line is well adapted to local climatic conditions. Thus, this comparison confirms the interest of this more prolific and more regular synthetic line to develop rabbit production in Algeria. © WRSA, UPV, 2003.

Mazouzi-Hadid F.,Mouloud Mammeri University | Abdelli-Larbi O.,Mouloud Mammeri University | Lebas F.,Cuniculture | Berchiche M.,Mouloud Mammeri University | And 2 more authors.
Animal Reproduction Science | Year: 2014

In Algeria, rabbit meat production is small-scale, mainly on small farms with rabbits from local populations whose productivity and growth are rather low, but which are well adapted to the local environment. Of these, farmers prefer white rabbits, with the Albino or Himalayan alleles of gene C. Our objective was to verify the appropriateness of this preference for white rabbit does over a period long enough to also assess the effect of season. From September 2006 to June 2010, reproduction data from 209 females (138 white and 71 coloured) mated by 51 males from the same population were recorded. There was neither effect of sire coat colour nor any interactions between coat colour, season and physiological status of does. There was a significant relationship between coat colour (white vs. coloured) and most reproductive traits, except receptivity and fertility, in favour of coloured females. Litter size was higher by 0.67 kits born ( P= 0.041), 1.27 born alive ( P< 0.0001) and 1.04 weaned ( P= 0.0011). There was a highly significant effect of season on all the measured traits. Receptivity, fertility and prolificacy were significantly higher before the hot period; in summer, reproductive performance was depressed, but no more than during the following period, confirming the good adaptation of this local population to hot conditions. We can conclude that the preference of farmers for white animals is not justified because there is in this population an unfavourable genetic association between reproduction and Albino or Himalayan alleles of C gene, which needs to be explored in more detail. © 2014 Elsevier B.V.

Abdeli-Larbi O.,Mouloud Mammeri University | Mazouzi-Hadid F.,Mouloud Mammeri University | Berchiche M.,Mouloud Mammeri University | Bolet G.,French National Institute for Agricultural Research | And 2 more authors.
World Rabbit Science | Year: 2014

This study evaluated the effect of dam coat colours, doe's parity order, year and kindling season on litter size and growth of suckling kits of a local Algerian rabbit population. Rabbits were reared in the rabbitry of Tizi Ouzou (Algeria) in wire mesh cages placed in a building with natural lighting and ventilation and absence of temperature regulation. Weights and size of 572 litters (3795 kits) at birth, 7, 14, 21 and 28 d were analysed. The mother's coat colours (2 levels only: albino or coloured coat), the doe's parity (1, 2, 3, 4-5, 6-8, ≥9 kindlings), the kindling year (4 consecutive years) and the kindling season (3 seasons: Feb- May, June-Sept and Oct-Jan), were used as main fixed factors in a factorial analysis. The population was characterised by an average individual weight of 54 g at birth and 404 g at 30 d, growth rate of 10.24 g/d between birth and 24 d and of 19.02 g/d between 24 and 30 d. The coloured females were more prolific than the albino ones: 5.59 vs. 5.09 weaned/litter (P=0.016); but kits born from albino does had a larger individual weight at weaning: 391 vs. 362 g (P=0.006). The doe's parity order had no significant influence on the litter weight, individual weight or litter size at kindling. However, it influenced litter weight and litter size from 7 d of age up to 28 d in favour of 2ndand 3rdparity (P<0.02). Litter size was not significantly affected by year of kindling at any considered age. On the contrary, year of birth greatly influenced litter and individual weights. For example, the difference in individual weights at 28 d between the best and the worst year represented 19% of the average weight at this age. The birth season influenced mainly (P<0.001) litter size from birth until weaning in favour of the spring season: 5.92 weaned/litter vs. 5.05 or 5.04 for the 2 other seasons. From day 7 until weaning, the litter weight was larger for the Feb-May season (P<0.02) and represented +0.87 grams per litter at 28 d. The litter weight was similar for the 2 other seasons (non significant differences) whatever the age in consideration. Season had no significant effect on individual weight of kits from birth until weaning. © WRSA, UPV, 2003.

Discover hidden collaborations