FR 42. Preweaning growth in West African sheep

  • Cesar Zambrano UNELLEZ, Venezuela


Preweaning growth was evaluated on a high breed ovine West African flock, in tropical dry forest environment, grazing on B. decumbens (30 %), D. swazilandensis (30%) and H. rufa (60%); stocking rate was equivalent to 16 anim/ha. Variance of birth weight (PN), weaning weight (PD) and preweaning growth weight (GDPRD) were analized by a least square method, considering the effects of sex (M,H); type of birth (TP): simple (Ps) or multiple (Pm); season of birth (EN): rainy (LL), transcision (T) and dry (S); year of birth (AÑO): 93, 94 y 95; interactions, age (EMP) and weight (PMP) at lambing mother and age at weaning lambs (ED) as covariables. Adjusted average of PN, PD and GDPRD were 2.87 kg, 12.62 kg and 99.31 g respectively. PN was higher (P<.05) for M. Lambs born from Ps had higher PN, PD and GDPRD (P<.01). PN (P<.05) and PD (P<.01) were higher in T. AÑO affected PN (P<.01) and GDPRD (P<.05). PMP affected PN, PD and GDPRD (P<.01). EMP affected PD (P<.05); and EDC affected PD (P<.05) and GDPRD (P<.01). The most significant factors were TP, EN and PMP.


Download data is not yet available.
How to Cite
Zambrano, Cesar. 2005. “FR 42. Preweaning Growth in West African Sheep”. Latin American Archives of Animal Production 5 (3).