Results of a 12 month study of traditional guinea-pig production in the western highlands of Came... more Results of a 12 month study of traditional guinea-pig production in the western highlands of Cameroon are reported. The mean age of guinea-pigs (Cavia porcellus L.) at first parturition, kidding interval and litter size at birth were 126.30 +/- 10.40 d, 64.8 +/- 1.70 d and 1.63 +/- 0.26 kids respectively. The annual reproductive rate was 9.18 kids/breeding doe while the doe post-partum weight was 530 g. Mean body weights at birth, presumed weaning (21 d) and 15 weeks of age were 78.36 +/- 3.20, 147.51 +/- 8.10 and 418.88 +/- 32 g respectively. Type of birth and sex had a significant effect on body weight at all ages. Birth weight dropped significantly from 83.88 +/- 2.87 g for singles to 81.57 +/- 3.40 g for twins, 74.25 +/- 2.39 g for triplets and 73.75 +/- 4.12 g for quadruplets. These differences were maintained to maturity (15 weeks). Males were generally heavier than females. Mortality rates were relatively high among kids: 24% at birth, 39% at 3 weeks and 40% at 15 weeks. Prod...
From January to September 2010, studies were undertaken in rural, peri-urban and urban areas of t... more From January to September 2010, studies were undertaken in rural, peri-urban and urban areas of the Sudano-sahelian agro-ecological zone of Cameroon to characterize the production system of indigenous chicken populations. The study was also aimed at generating information on village based indigenous chicken utilization, management practices, opportunities and challenges. Thirteen villages were investigated in the Far-north and North regions using a structured questionnaire. The study of Sudano-sahelian local chicken production system revealed that women are responsible for chicken rearing in households (72.5%), the level of education was variable, with 45.1% sampled farmers who have never gone to school, and only 3.9% having post secondary school of education. Auto-consumption of chicken was the general and major objective of chicken breeding in the area (23.5%). Goat, cattle, sheep and small birds were associated to chickens in the household by the proportions of 32.21, 28.11, 10.7...
Une étude de caractérisation a été réalisée sur la poule locale camerounaise à la Ferme d'App... more Une étude de caractérisation a été réalisée sur la poule locale camerounaise à la Ferme d'Application et de Recherche de l'Université de Dschang, en vue de déterminer les influences du type génétique et du sexe sur les paramètres hématologiques et la viabilité. Elle a porté sur 301 sujets âgés de 16 semaines de 4 types génétiques (cou-nu [Na], Tarse emplumé [Pti], Normal [na] et Huppé [Cr]). L'ANOVA à 2 facteurs a révélé des différences significatives (P<0,01) des facteurs étudiés sur l'hématocrite et la numération globulaire. Indépendamment du sexe, l'hématocrite a été plus élevé (P<0,01) chez le type Huppé, tandis que le Tarse emplumé a enregistré la plus faible moyenne. Les hématocrites des mâles ont été supérieurs (P<0,01) à ceux des femelles. En ce qui concerne la numération globulaire, le nombre d'érythrocytes a été supérieur (P<0,01) chez le type Huppé comparé aux autres types. Par ailleurs, aucune différence significative n'a été obser...
This study had as objective to contribute to the genetic improvement of the local chicken by dire... more This study had as objective to contribute to the genetic improvement of the local chicken by direct and reciprocal crossings with an exotic standard strain. The experimental birds where the parental genotypes HH (pure Hubbard strain; 88), LL (pure local chicken; 58) and their reciprocal crossbreds HL (crossbreds Hubbard rooster x local hen; 36) and LH (crossbreds local rooster x Hubbard hen; 39). It came out from the study that the effect of genotype was significant on all the parameters under study. The products of the crossings (F1) presented intermediate performances to those of their pure parents HH and LL. The effect of the heterosis was in general weak and positive only in some cases. As related to food consumption and feed efficiency, negative heterosis revealed a lower consumption of the crossbreds and a better food conversion for the LH at the seventh week (-15.6% and-19.7%). The mean parents in general had some performances higher to those of their descendants, notably for...
Bulletin of Animal Health and Production in Africa, 2011
... JC Fotsa, D Poné Kamdem, X Rognon, M Tixier-Boichard, D Fomunyam, J Choupamom, J Tchoumboué, ... more ... JC Fotsa, D Poné Kamdem, X Rognon, M Tixier-Boichard, D Fomunyam, J Choupamom, J Tchoumboué, Y Manjeli, A Bordas. Abstract. Les performances de croissance des populations de poules locales des hauts plateaux (Régions de l'Ouest et du Nord-Ouest) et des forêts ont ...
International Journal of Biological and Chemical Sciences, 2007
ABSTRACT This paper presents the first record of B chromosomes in some adult male individuals of ... more ABSTRACT This paper presents the first record of B chromosomes in some adult male individuals of the African pest grasshopper Taphronota thaelephora collected from Balepa – Mbouda in the Western Province of Cameroon. Of the twenty individuals examined, thirteen had the characteristic Pyrgomorphidae karyotype of 2N= 19(18A+XO) while the remaining seven had a diploid chromosome number of 2N= 20(18A+XO+1B) indicating the presence of a single B chromosome. The B chromosome in this population was short, acrocentric in morphology and stained to the same intensity as the autosomes throughout meiosis. It did not associate with any chromosome in meiosis. In some cells it migrated to the same pole as the X-chromosome while in other cells it migrated to the pole opposite to that of the X-chromosome indicating irregular behaviour in meiosis. The presence of the B chromosome did not affect chiasma frequency in the species. International Journal of Biological &amp; Chemical Sciences Vol. 1 (2) 2007: pp. 151-157
Results of a 12 month study of traditional guinea-pig production in the western highlands of Came... more Results of a 12 month study of traditional guinea-pig production in the western highlands of Cameroon are reported. The mean age of guinea-pigs (Cavia porcellus L.) at first parturition, kidding interval and litter size at birth were 126.30 +/- 10.40 d, 64.8 +/- 1.70 d and 1.63 +/- 0.26 kids respectively. The annual reproductive rate was 9.18 kids/breeding doe while the doe post-partum weight was 530 g. Mean body weights at birth, presumed weaning (21 d) and 15 weeks of age were 78.36 +/- 3.20, 147.51 +/- 8.10 and 418.88 +/- 32 g respectively. Type of birth and sex had a significant effect on body weight at all ages. Birth weight dropped significantly from 83.88 +/- 2.87 g for singles to 81.57 +/- 3.40 g for twins, 74.25 +/- 2.39 g for triplets and 73.75 +/- 4.12 g for quadruplets. These differences were maintained to maturity (15 weeks). Males were generally heavier than females. Mortality rates were relatively high among kids: 24% at birth, 39% at 3 weeks and 40% at 15 weeks. Prod...
From January to September 2010, studies were undertaken in rural, peri-urban and urban areas of t... more From January to September 2010, studies were undertaken in rural, peri-urban and urban areas of the Sudano-sahelian agro-ecological zone of Cameroon to characterize the production system of indigenous chicken populations. The study was also aimed at generating information on village based indigenous chicken utilization, management practices, opportunities and challenges. Thirteen villages were investigated in the Far-north and North regions using a structured questionnaire. The study of Sudano-sahelian local chicken production system revealed that women are responsible for chicken rearing in households (72.5%), the level of education was variable, with 45.1% sampled farmers who have never gone to school, and only 3.9% having post secondary school of education. Auto-consumption of chicken was the general and major objective of chicken breeding in the area (23.5%). Goat, cattle, sheep and small birds were associated to chickens in the household by the proportions of 32.21, 28.11, 10.7...
Une étude de caractérisation a été réalisée sur la poule locale camerounaise à la Ferme d'App... more Une étude de caractérisation a été réalisée sur la poule locale camerounaise à la Ferme d'Application et de Recherche de l'Université de Dschang, en vue de déterminer les influences du type génétique et du sexe sur les paramètres hématologiques et la viabilité. Elle a porté sur 301 sujets âgés de 16 semaines de 4 types génétiques (cou-nu [Na], Tarse emplumé [Pti], Normal [na] et Huppé [Cr]). L'ANOVA à 2 facteurs a révélé des différences significatives (P<0,01) des facteurs étudiés sur l'hématocrite et la numération globulaire. Indépendamment du sexe, l'hématocrite a été plus élevé (P<0,01) chez le type Huppé, tandis que le Tarse emplumé a enregistré la plus faible moyenne. Les hématocrites des mâles ont été supérieurs (P<0,01) à ceux des femelles. En ce qui concerne la numération globulaire, le nombre d'érythrocytes a été supérieur (P<0,01) chez le type Huppé comparé aux autres types. Par ailleurs, aucune différence significative n'a été obser...
This study had as objective to contribute to the genetic improvement of the local chicken by dire... more This study had as objective to contribute to the genetic improvement of the local chicken by direct and reciprocal crossings with an exotic standard strain. The experimental birds where the parental genotypes HH (pure Hubbard strain; 88), LL (pure local chicken; 58) and their reciprocal crossbreds HL (crossbreds Hubbard rooster x local hen; 36) and LH (crossbreds local rooster x Hubbard hen; 39). It came out from the study that the effect of genotype was significant on all the parameters under study. The products of the crossings (F1) presented intermediate performances to those of their pure parents HH and LL. The effect of the heterosis was in general weak and positive only in some cases. As related to food consumption and feed efficiency, negative heterosis revealed a lower consumption of the crossbreds and a better food conversion for the LH at the seventh week (-15.6% and-19.7%). The mean parents in general had some performances higher to those of their descendants, notably for...
Bulletin of Animal Health and Production in Africa, 2011
... JC Fotsa, D Poné Kamdem, X Rognon, M Tixier-Boichard, D Fomunyam, J Choupamom, J Tchoumboué, ... more ... JC Fotsa, D Poné Kamdem, X Rognon, M Tixier-Boichard, D Fomunyam, J Choupamom, J Tchoumboué, Y Manjeli, A Bordas. Abstract. Les performances de croissance des populations de poules locales des hauts plateaux (Régions de l'Ouest et du Nord-Ouest) et des forêts ont ...
International Journal of Biological and Chemical Sciences, 2007
ABSTRACT This paper presents the first record of B chromosomes in some adult male individuals of ... more ABSTRACT This paper presents the first record of B chromosomes in some adult male individuals of the African pest grasshopper Taphronota thaelephora collected from Balepa – Mbouda in the Western Province of Cameroon. Of the twenty individuals examined, thirteen had the characteristic Pyrgomorphidae karyotype of 2N= 19(18A+XO) while the remaining seven had a diploid chromosome number of 2N= 20(18A+XO+1B) indicating the presence of a single B chromosome. The B chromosome in this population was short, acrocentric in morphology and stained to the same intensity as the autosomes throughout meiosis. It did not associate with any chromosome in meiosis. In some cells it migrated to the same pole as the X-chromosome while in other cells it migrated to the pole opposite to that of the X-chromosome indicating irregular behaviour in meiosis. The presence of the B chromosome did not affect chiasma frequency in the species. International Journal of Biological &amp; Chemical Sciences Vol. 1 (2) 2007: pp. 151-157
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