Skip to main content

Table 1 Distribution of horses by age and sex competing in Japan Racing Association races, by month

From: Seasonal fluctuations in body weight during growth of Thoroughbred racehorses during their athletic career

Age (y) Sex January February March April May June July August September October November December
2 Male       1480 4378 6067 7037 9303 12,702 13,493
Gelding       (14) a (40)a (51)a (53)a 102 174 218
Female       1121 3218 4632 5160 6436 8816 9283
3 Male 14,801 13,914 17,045 16,342 17,386 14,659 13,957 13,166 11,475 8600 6948 6797
Gelding 281 291 435 435 551 505 553 605 493 333 225 273
Female 10,311 9729 12,636 12,262 13,059 11,139 11,905 12,043 10,003 5860 4194 3764
4 Male 6699 5893 7353 6775 6925 6052 6233 5683 5104 5876 5957 5598
Gelding 278 279 375 344 375 348 369 374 334 408 399 423
Female 3471 3144 4025 3702 3957 3430 4117 4044 3308 3421 3303 3089
5 Male 5326 4725 5623 4872 5078 4033 3811 3250 3071 3808 3850 3744
Gelding 362 347 392 394 456 339 324 350 320 397 381 373
Female 2602 2358 2790 2470 2631 1967 2161 2190 1782 1888 1803 1690
6 Male 3299 2889 3219 2857 2914 2211 2218 1857 1539 1939 2036 1936
Gelding 289 260 324 276 293 256 271 253 205 253 230 255
Female 1309 1159 1193 796 752 573 632 618 536 554 510 451
7 Male 1635 1423 1548 1366 1391 1081 1019 853 654 854 883 791
Gelding 187 151 212 162 157 136 133 118 97 122 129 116
Female 339 261 271 194 191 136 171 150 101 118 113 97
  1. aThe data for 2-year-old geldings between June and September were not used for the seasonal-trend decomposition analysis because of the small sample size