The Jockey Club today released Report of Mares Bred (RMB) statistics for the 2012 breeding season. Based on RMBs received through Oct. 14, 2012, The Jockey Club reports that 1,861 stallions covered 35,391 mares in North America during 2012.

The annual statistics include the number of mares reported bred to each stallion and represent approximately 90% of the mares that eventually will be reported as bred in 2012. According to historical trends, The Jockey Club expects to receive RMBs representing an additional 3,500 to 4,500 mares bred during the 2012 breeding season.

The number of stallions declined 3.8% from the 1,935 reported at this time in 2011, and the number of mares bred fell 3.0% from the 36,504 reported at this time last year.

RMB statistics for all reported stallions in 2012 are availablethrough the Publications & Resources section of The Jockey Club’s websiteat jockeyclub.com.

The number of stallions covering 100 or more mares increased from84 in 2011 to 87 in 2012. These stallions accounted for a greater percentage ofthe total mares reported bred this year — 31.9% of all mares bred in 2012versus 30.6% of all mares bred in 2011 as reported at this time last year.

Further book size analysis shows a 1.1% increase in the number ofmares bred to stallions with a book size of 100 or more in 2012 when comparedto 2011 as reported at this time last year; a 14.4% increase in mares bred tostallions with a book size between 75 and 99; a 4.1% decline in mares bred tostallions with a book size between 50 and 74; an 10.6% decrease in mares bredto stallions with a book size between 25 and 49; and an 6.3% decline in maresbred to stallions with a book size fewer than 25.

In 2012, Cape Blanco (IRE) led all stallions with 220 mares bred.Rounding out the top five were Scat Daddy, 217; Kitten’s Joy, 213; Uncle Mo,211; and Wilburn, 169.

Thoroughbred breeding activity in Kentucky traditionally leadsNorth America. During 2012, Kentucky’s 224 reported stallions covered 15,361mares, or 43.4% of all of the mares reported bred in North America. The numberof mares bred to Kentucky stallions declined 2.2% percent against the 15,714reported at this time last year.

Of the top 10 states and provinces by number of mares reportedbred in 2012, only Florida and New York stallions covered more mares in 2012than in 2011, as reported at this time last year. The following table shows thetop 10 states and provinces, ranked by number of mares reported bred in 2012 through Oct. 14, 2012:

Note: Each incident in which a mare was bred to more than one stallion and appeared on multiple RMBs is counted separately. As such, mares bred totals listed in the table above may differ slightly from counts of distinct mares bred.

The Jockey Club, founded in 1894 and dedicated to the improvement of Thoroughbred racing and breeding, is the breed registry for North American Thoroughbreds. In  fulfillment of its mission, The Jockey Club provides support and leadership on a wide range of important industry initiatives and it serves the information and technology needs of owners, breeders, media, fans and farms, among others. Additional information is available at jockeyclub.com.