Productive and reproductive performances of smallholder West African shorthorn Lagune cattle herds under village conditions in Southern Benin.

The West African shorthorn Lagune cattle has long been incriminated as of low productivity and subjected to gradual replacement or indiscriminate crossbreeding with zebu breeds. But there are still insufficient studies reporting the productive and reproductive performances of this breed under village conditions. This study aimed to evaluate the productive and reproductive performances of the Lagune cattle herds kept under village conditions in two agroecological zones in Southern Benin. Sixteen herds (seven in the Oueme Valley zone and nine in the Pobe zone), chosen from a previous retrospective survey, were regularly visited on a bi-monthly basis between January 2018 and February 2019. At the first visit to each selected herd, all animals present were identified, their ages determined through their dentition, and their breeding history recorded. At each subsequent visit, information on calving, birth weights, herd entries and exits, disease incidence, and changes in the physiological status of the animals were recorded. In addition, all suckling calves from birth to 6 months of age were weighted and measured. The average age at first calving was 37.2 ± 3.5 months and varied from 3 to 4 years. With no significant variations between agroecological zones, the parturition rate, fertility rate, fecundity rate, and abortion rate were, respectively, 74.3% ± 10.7, 77.0% ± 12.0, 68.9% ± 9.1, and 2.7% ± 1.4. The overall annual mortality rate and perinatal mortality rate were 8.4% ± 3.1 and 7.3% ± 2.7, respectively. The annual offtake rate was 12.9% ± 4.3 and varied significantly (P ≤ 0.05) between zones. The average birth weight varied significantly (P ≤ 0.05) between sex and was 10.2 ± 0.7 kg and 10.8 ± 0.9 kg for female and male, respectively. The average daily body weight gain of calves, calculated over the period from birth to 6 months of age, was 160.5 ± 8.5 g/day. In addition to environmental conditions, individual farmers' management practices varied significantly among herds and probably influenced the recorded reproductive and productive performances. The estimates of reproductive parameters obtained in this study suggest a good reproductive ability of the Lagune breed which could be improved with better management conditions.

Morphological divergence in the West African shorthorn Lagune cattle populations from Benin.

This study explored the potential role of agro-ecology in shaping the morphology of Lagune cattle population of Benin. A total of 708 adult Lagune cattle were sampled randomly from nine provenances in two agro-ecological zones (AEZs) and were assessed for eight qualitative and twelve linear body measurements. Data were analyzed using generalized linear model procedures (PROC GLM) followed by the multiple comparison of least square means (LSMEAN) according to the Tukey-Kramer method and multivariate analytical methods, including canonical discrimination analysis (CDA) and hierarchical ascendant classification. Irrespective of AEZ and sex, the body length (102.3 ± 9.31 cm) was greater than the wither height (93.1 ± 7.39 cm) and the body index smaller than 0.85. However, there were significant differences between the two AEZs for most of the measured morphometric and qualitative traits. Moreover, a male-biased sexual size dimorphism was recorded. The CDA based on only four basic body measurements (rump height, body length, heart girth, and ear length) and the calculated Mahalanobis distances suggest that the populations from the two AEZs are distinct and could be further considered ecotypes. Nevertheless, the overall moderate classification rate (70%) of the individual animals into their group of origin indicates interbreeding between the two populations. The pairwise Mahalanobis distances between provenances in the same AEZ were also significant. Together, these results provide supporting evidence for the existence of subdivisions in the Lagune cattle populations from South Benin. The high morphological diversity in the Lagune cattle recorded in the present study could serve as a starting point for the development of efficient selection and sound subpopulation management strategies but also for further phenotypic and genetic characterizations.

Comparison of some zootechnical performances of local and Red Maradi goats reared under smallholder production systems in the Sudanian zone of Benin.

The aim of this research was to compare the zootechnical performances of indigenous and Maradi goats reared under village conditions in the Sudanian zone of Benin. A questionnaire survey was carried out between August and October 2019, using the 12MO, a retrospective method for estimating demographic parameters in tropical ruminant livestock population and the progeny history method. Information related to farmers' socioeconomic characteristics, goat herd management practices and demographic parameters, and milk productivity from 198 does including 66 West African Dwarf (WADG), 68 Red Maradi (RMG) and 64 West African long-legged (WLLG) goats were collected in 80 smallholder farms. Pearson Chi-square and Kruskal-Wallis W tests were performed respectively on the categorical and continuous variables. The average herd size was about 16.7 ± 9.0; 5.8 ± 3.1 and 15.4 ± 7.4 heads respectively for WADG, RMG and WLLG. Bucks were absent in several herds where kids (47.9 ± 12.8%) and does (46.6 ± 12.8%) predominated. Prolificacy rates at first and second parturition varied significantly (P ≤ 0.05) among goat types and were respectively 165.2 ± 59.5% and 195.1 ± 66.9% for WADG; 160.3 ± 55.0% and 196.0 ± 53.9% for RMG; 134.4 ± 54.1% and 154.6 ± 51.0% for WLLG. Parturition rates were higher (P ≤ 0.05) in WADG (159.1 ± 49.5%) than in RMG (138.2 ± 49.0%) and WLLG (132.8 ± 47.3%). Likewise, productive rates were higher (P ≤ 0.05) in WADG (277.3 ± 142.3%) than in RMG and WLLG (204.4 ± 125.1% and 168.8 ± 102.2% respectively). Milking was only performed on RMG and the amount of milk collected per milking ranged between 0.6 and 1 liter per doe. Enhancing goat herds' productivity could be achieved through improved general herd management practices.

Morphological variability within the indigenous sheep population of Benin.

Knowledge of both the genetic diversity and geographical distribution of animal genetic resources is a prerequisite for their sustainable utilization, improvement and conservation. The present study was undertaken to explore the current morphological variability within the sheep population in Benin as a prelude for their molecular characterization. From November 2018 to February 2020, 25 quantitative linear body measurements and 5 qualitative physical traits were recorded on 1240 adult ewes from the 10 phytogeographic zones that comprise the three vegetation zones of Benin. Fourteen morphological indices were calculated based on the linear body measurements. The collected data were first analyzed using multiple comparisons of least-square means (LSmeans), followed by generalized linear model (GLM) procedures, to explore the relationships among the measured morphometric traits and the 10 phytogeographic zones. Next, the presence of any genetic sub-populations was examined using multivariate analytical methods, including canonical discriminant analysis (CDA) and ascending hierarchical clustering (AHC). Univariate analyses indicated that all quantitative linear body measurements varied significantly (P<0.05) across the phytogeographic zones. The highest values (LSmean± standard error) of withers height (68.3±0.47 cm), sternum height (46.0±0.35 cm), and rump height (68.8±0.47 cm) were recorded in the Mekrou-Pendjari zone, the drier phytogeographic zone in the North, whereas the lowest values, 49.2±0.34, 25.9±0.26, and 52.0±0.35 cm, respectively, were recorded in the Pobe zone in the South. Multivariate analyses revealed the prevalence of four distinct sheep sub-populations in Benin. The sub-population from the South could be assimilated to the short-legged and that from the North to the West African long-legged sheep. The two other sub-populations were intermediate and closer to the crossbreeds or another short-legged sub-breed. The proportion of individuals correctly classified in their group of origin was approximately 74%. These results uncovered a spatial morphological variation in the Beninese sheep population along a South-North phytogeographic gradient.

Confronting pastoralists' knowledge of cattle breeds raised in the extensive production systems of Benin with multivariate analyses of morphological traits.

Cross-border seasonal livestock movements in West Africa bring into close contact several cattle breeds. In the coastal countries hosting migrating herders from the Sahel, it often affects the genetic variability and geographical distribution of traditional cattle breeds, through their indiscriminate but also intended crossbreeding with larger-framed Sahelian cattle breeds. The need to secure and effectively manage this genetic variability, in order to respond to changing production and market conditions, is widely recognized by the scientific community, livestock herders and policy-makers. This however requires a comprehensive knowledge of the breeds' characteristics. The indigenous criteria used by pastoralists to characterize and distinguish cattle breeds remain unclear and further validation is required. This study was therefore designed to document and validate herders' knowledge on cattle breeds. From June 2015 to June 2016, 803 cattle herders participated in a phenotypic breed description in seven pastoral communities across the country. Each cattle herder was asked to name and describe morphologically the different cattle breeds in his herd. Subsequently, fifteen body measurements taken on a total of 1401 adult cattle (964 cows and 439 bulls) were submitted to multivariate analyses. Participants distinguished ten different cattle breeds kept in traditional herds according to six primary morphological traits and clearly separated zebuine from taurine breeds. These results were consistent with those of the multivariate analyses of the measured traits. However, herders' classification approach proved to be more accurate in distinguishing breeds within the zebuine subspecies. Hence, while metric measurements and molecular genetic analyses are promising approaches to fill the knowledge gap on the diversity of local farm animal genetic resources, they should integrate livestock herders' traditional knowledge for more precision.