01924naa a2200289 a 450000100080000000500110000800800410001910000210006024501410008126000090022252011000023165000110133165000200134265000130136265000170137565000110139265000180140365000170142165300170143865300100145565300230146565300200148870000180150870000250152670000200155177300630157117920392017-04-05       1997    bl ---       0--  u    #d1 aSERENO, J. R. B.  aEstablishment of a breeding season and evaluation of the reproductive performance of the Pantaneira horse in Mato Grosso do Sul, Brazil.  c1997  aThe objective of this study was to establish a breeding season and to evaluate the reproductive performance of a horse herd of the Pantaneira breed from Nhumirim Ranch in the lowlands of Mato Grosso do Sul, Brazil. During the period 1990/91, the stallion was kept year-round with 17 mares. In the following year (91/92) a breeding season of seven months (Sept. 91 to Mar. 92) was established, in which the stallion and 15 mares were used. In the first period (90/91), the concentration of births occurred from September to December of 1991. The percentage of pregnancy and parturition observed in 90/91 and 91/92 for the male: female proportions of 1:17 and 1:15 were: 82.3, 100 and 86.7, 100%, respectively. In the breeding season from Oct. 91 to Feb. 92 with male/female ratios of A-1:11, B-1:10 and C-1:10, it was observed that the percentage of pregnancy was 90.9, 100 and 100%, respectively, with 100% parturition in the 3 groups. Independently of the number of females used (A-1:10, B-1:08, C-1:12), the rate of pregnancy obtained from the breeding season from Oct. 92 to Feb. 93 was 100%.  aBrazil  abreeding season  aPantanal  areproduction  aCavalo  aConservação  aReprodução  aConservation  aHorse  aMato Grosso do Sul  aRaca Pantaneira1 aSANTOS, S. A.1 aZUCCARI, C. E. S. N.1 aMAZZA, M. C. M.  tAnimal Genetic Resources Informationgv.21, p.43-48, 1997.