Moura, A. C. B.Teixeira, P. P. M.Coutinho, L. N. [UNESP]Paz, C. C.Santos, V. J. C. [UNESP]Soares, F. N.Oliveira, M. E. F. [UNESP]Vicente, W. R. R. [UNESP]Araujo, A. A.Rodrigues, L. F. S.2014-12-032014-12-032014-01-01Animal Reproduction. Belo Horizonte: Brazilian Coll Animal Reproduction, v. 11, n. 1, p. 44-48, 2014.1806-9614http://hdl.handle.net/11449/111372The aim of this study was to evaluate the reproductive performance of ewes during the dry and wet months in northern Brazil. The females were divided into two groups: reproduced during the dry season and lambing in the rainy season (Group A, n = 38), and the opposite with the other group (Group B, n = 55). There was no difference (P > 0.05) for expression of estrus (86.8 and 98.3%), pregnancy rate (86.8 and 90.9%), lambing (76.3 and 83.6%), abortion (9 and 7.4%), fecundity (86.8 and 96.3%), birth (103.4 and 110.8%) and prolificacy (113.7 and 115.2%) observed in groups A and B, respectively. However, there was a difference (P < 0.05) in lamb mortality (26.6% for group A and 49% for group B). Ewes from group A presented a higher average live weight at the end of the reproductive season and during the final third of pregnancy (P < 0.05).44-48engAmazonian climatelambing seasonreproductive performancesSeasonalityArtigoWOS:000337354300007Acesso abertoWOS000337354300007.pdf