The majority of Tswana sheep and goats in Botswana are indigenous. These animals provide income, employment and food security to the resource-poor farmers. Limited characterization of these species has been done, resulting in poor efforts to fully exploit and conserve them. The objective of this study was to phenotyically characterize indigenous sheep and goats countrywide. Measurements were collected from 2783 goats and 1282 sheep kept by traditional farmers, covering nearly all the districts of Botswana. In each district a total of 15 farmers with sheep and goats were selected randomly and records were taken on 4-12 animals per farm, depending on average district flock size. Traits recorded for each animal were body length, body weight, ear length, heart girth, height at withers, hip width, neck length, rump height, shoulder width, tail length (goats only) and horn length. Age (estimated from dentition) and sex of the animals were also recorded and vegetation type was noted. The data were analysed using the general linear model procedure in Statistical Analysis System. Prior to analyses, a main effects model of sex, age and vegetation type was fitted. Later, two types of analyses were done: (i) within a vegetation type fitting sex and age and their interaction, and (ii) within sex fitting age and vegetation type and their interaction. Least-squares means were separated using Student's t-test. Sex, age and vegetation significantly (p<0.05) affected the magnitude of traits. Phenotypic body measurements of castrates were generally higher than in both females and entire males, which were similar. The body measurements of younger animals were less than those of older age groups since the former were still growing compared to the latter. Different vegetation types promoted different body measurements, which should be expected due to differences in nutrient supply from different vegetation types. The indigenous breeds of sheep and goats can be classified as medium-size breeds. The breeds should be conserved since they are well suited to the harsh environment of Botswana where drought and livestock diseases are ever present. Efforts should be undertaken to characterize them genetically and increase their productivity.

The objective of this study was to determine the usefulness of some linear body measurements in predicting live weight in indigenous Tswana goats at various ages. Data for this study were obtained from 2,783 goats sampled from six agricultural regions of Botswana except for Tsabong and Ghanzi districts. Fifteen farmers keeping goats were randomly selected from each district and records taken on a random sample of 4-12 animals per farm depending on the 1999 Botswana Government average district flock size. Body measurements recorded were heart girth, height at withers, body length, shoulder width, and live weight. Information on age of each animal was estimated from dentition; flock size and sex of the animal were also recorded for each farm. Regression analysis using stepwise selection method in Statistical Analysis System was used to determine prediction equations for live weight with heart girth, height at withers, body length, and shoulder width as independent variables for male and female goats of different ages. In all models, heart girth contributed most in explaining variation in body weight as shown by high partial R(2) which ranged from 0.48 for female mature to 0.80 for mature male goats. Using mean square error, R(2), and Mallows' C(p), the best prediction equations were for female and male kids (R(2) = 0.83 and 0.82, respectively) and mature male goats (R(2) = 0.82). The poorest model was for mature female goats with R(2) = 0.57. Live body weight could be estimated with accuracy from linear body measurements in Tswana goats which are unique for each sex and age. More research is required to explore using these models to develop measuring tapes for use by resource poor farmers who keep indigenous Tswana goats.

SummaryIndigenous Tswana pigs are mostly found in Southern Botswana. There is concern that the breed may become extinct due to the low usage of the breed and the lack of implementation of a comprehensive conservation strategy. The objectives of this study were to identify places where indigenous Tswana pigs are kept in Gaborone Agricultural Region and document the numbers, distribution, management and utilisation of these pigs. A formal questionnaire was administered to all indigenous pig farmers who could be identified. The data was analysed using procedure frequency in Statistical System Analysis. A total of 51 indigenous pig farmers were interviewed, of these 71%, 16% and 14% were in Southeast, Kgatleng and Kweneng districts respectively. Only one farmer kept crossbreeds with the majority keeping pure indigenous Tswana. A total of 124 sows, 23 boars, 32 castrates and 211 piglets were counted in this region. All the pigs were kept under the communal system. None of the farmers surveyed kept records and they exhibited limited knowledge of pig farming and improved management. Pigs were kept for home consumption with very few sold, given out as gifts or loaned out. Pig fat was used as a by-product to make soap and a lubricant in traditional leather rope making. The farmers’ perception of indigenous pigs is good; they claim that the pigs posses traits of economic importance such as high heat and drought tolerance, which are of great significance in the harsh climatic conditions of Botswana. There is a need to undertake conservation efforts for this breed given that it survives and reproduces under harsh climatic conditions and sub-standard management. More research and further action is required to increase the production of this breed.