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Aim:The aim of the study was to assess the effect of udder morphological characteristics on milk yield in zebu cows of Cameroon.Materials and Methods:The diameter and height of the udder, length and diameter of the teat, and the milk yield were measured in 29 Djafun (Red Mbororo) and 19 Aku (White Fulani) cows in Louggueré zootechnical station in the North region of Cameroon.Results:Overall, strong positive correlation (rp=0.60) between the diameter (240.21±28.58 mm) and height (131.12±23.64 mm) of udders (p<0.001) and between length (39.51±6.44 mm) and diameter (19.85±3.08 mm) of teats (rp=0.78) were found in the zebu cows. Udder morphologic characteristics varied significantly (p<0.005) according to breed, lactation stage and parity, and height at whiters. There was significant (p<0.001) correlations between udder diameter (rp=0.541) and height (rp=0.549) with milk yield.Conclusion:This study ascertained udder morphological characteristics values in local zebu cows, and showed that udder size is strong and positively correlated to milk yield. The findings are useful in genetic improvement programs of zebu cows.

In order to assess socio-economic characteristics of cattle breeders and their effect on farmers' practices, a survey was carried out in Vina division within the Adamawa highlands of Cameroon, from November, 2009 to October, 2010. Data were collected from 159 farmers in 9 localities, using a structured questionnaire. Information on breeder's ethnic group, age, marital status, education level, number of children, reasons for rearing cattle, labor distribution, herd size and composition, feeding and reproductive practices were obtained. Many (64.8%) cattle breeders were from the Peulh and Mbororo ethnic groups. More than 59% of the farmers were between 26 and 45 years old. The educational level was mostly primary and coranic. Wealth accumulation and social status were the main reasons for cattle breeding. The reasons for keeping cattle varied with ethnic group, age and educational level of farmers. Herd size ranged from 50 to 250 cattle. Health activities were carried out by herd owners. The Gudali zebu (48%) was the most common breed. More than 90% of cattle owners responded to practice feed supplementation with salt, cotton seed cake and cereal bran. Farmer's education level had an effect on supplementation practices. There was no significant difference (Z = 0.29) between the ability to detect estrus or not of cattle breeders. Free mating was the common breeding practice. Udder and abdomen development were the main criteria for pregnancy diagnosis.

In order to assess socioeconomic characteristics of cattle breeders and their effect on farmers' practices, a survey was carried out in Vina division within the Adamawa highlands of Cameroon, from November, 2009 to October, 2010. Data were collected from 159 farmers in 9 localities, using a structured questionnaire. Information on breeder's ethnic group, age, marital status, education level, number of children, reasons for rearing cattle, labor distribution, herd size and composition, feeding and reproductive practices were obtained. Many (64.8%) cattle breeders were from the Peulh and Mbororo ethnic groups. More than 59% of the farmers were between 26 and 45 years old. The educational level was mostly primary and coranic. Wealth accumulation and social status were the main reasons for cattle breeding. The reasons for keeping cattle varied with ethnic group, age and educational level of farmers. Herd size ranged from 50 to 250 cattle. Health activities were carried out by herd owners. The Gudali zebu (48%) was the most common breed. More than 90% of cattle owners responded to practice feed supplementation with salt, cotton seed cake and cereal bran. Farmer's education level had an effect on supplementation practices. There was no significant difference (Z = 0.29) between the ability to detect estrus or not of cattle breeders. Free mating was the common breeding practice. Udder and abdomen development were the main criteria for pregnancy diagnosis.