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Pre-weaning growth of lambs under village management system in Konni Local Government Area of Tahoua State in Niger Republic
Abstract
This study evaluated the pre-weaning growth performance of a total of 144 lambs from 118 dams selected purposively from cooperating farmers’ flocks in Gabastawa and Gumbi villages in Konni Local Government Area of Tahoua State in Niger Republic. Body weight of the lambs was assessed weekly, using the hanging type weight-balance, for a period of 12 weeks. Prior to the weekly weighing, each of the lambs was identified, using plastic number tags, on the bases of breed, sex, birth type, location of flock, nutritional status and parity of dam which were recorded on the lambs’ record card. Data collected was analyzed using SPSS software package (SPSS, 1995); and student's t-‐test as well as Duncan’s new multiple range tests were used for mean separations. Results of the study revealed that mean bodyweight of lambs increased from 2.56±0.75 kg at one week after birth to 10.25±1.80 kg at 12 weeks after birth. Mean body weight gain of the lambs was 641 g week-‐1 (or 91.5 g day-‐1). The lambs’ pre-‐weaning body weight changes produced a linear regression equation; Y = 0.598x + 3.518; and R2 = 93%. Of the various factors considered, only nutritional status of dam showed significant (P < 0.05) effect on the lambs’ pre-weaning body weights. Lambs from dams that had adequate nutrition weighed significantly (P < 0.05) heavier from week 2 (5.99±2.5 kg) to week 12 (13.14±2.2 kg); followed by those lambs from dams that had moderately adequate nutrition from week 6 to 12 and than those from the dams that had inadequate nutrition from week 2 (3.55±1.9 kg) to week 12 (8.83±2.0). It can be concluded that the pre-weaning growth performance of lambs in this study was comparable to those obtained under on-‐station
and the results underscore the importance of adequate nutrition as a major factor that influences lambs pre-‐weaning growth performance under the village production system. Hence, adequate nutrition of dams should be ensured to improve the pre-weaning growth of the lambs and overall productivity of sheep in the study area.
Key words: Pre-weaning growth, Lambs, Traditional management system, Niger Republic