The Jockey Club released Report of Mares Bred (RMB) statistics for the 2018 breeding season. Based on RMBs received through Oct. 16, 2018, The Jockey Club reports that 1,214 stallions covered 30,274 mares in North America during 2018.
The Jockey Club estimates an additional 3,000 to 4,000 mares will be reported as bred during the 2018 breeding season.
The number of stallions declined 9.5 percent from the 1,342 reported at this time in 2017, and the number of mares bred decreased 5.0 percent from the 31,863 reported last year. The number of stallions covering 125 or more mares increased from 60 in 2017 to 62 in 2018.
Further book size analysis shows a 3 percent increase in the number of mares bred to stallions with a book size of 125 or more in 2018 when compared to 2017 as reported at this time last year; a 1.4 percent decrease in mares bred to stallions with a book size between 100 and 124; a 7.0 percent increase in mares bred to stallions with a book size between 75 and 99; a 6.7 percent decrease in mares bred to stallions with a book size between 50 and 74; a 9.6 percent decrease in mares bred to stallions with a book size between 25 and 49; and a 16.7 percent decrease in mares bred to stallions with a book size fewer than 25.
The percentage of broodmares covered by large book size (125 or more) stallions increased from 29.4 percent in 2017 to 31.9 percent in 2018. From 2015-2017, this percentage had remained constant at approximately 29 percent, up from 20.5 percent in 2014.
The proportion of stallions with book sizes of 125 or more mares grew from 3.1 percent in 2014 to 4.5 percent from 2015-2017. In 2018, this proportion increased to 5.1 percent.
|% stallions with book size >125||3.1%||4.5%||4.5%||4.5%||5.1%|
|% mares covered by stallions with book size >125||20.5%||29.1%||28.7%||29.4%||31.9%|
Note: Statistics summarized as of October 16 of the breeding seasons indicated in the columns above; as reports of mares bred continue to be received, final statistics are subject to change.
RMB statistics for all reported stallions in 2018 are available through the Fact Book section of The Jockey Club's website at jockeyclub.com.
Kentucky traditionally leads North America in Thoroughbred breeding activity. During 2018, Kentucky's 228 reported stallions covered 17,322 mares, or 57.2 percent of all of the mares reported bred in North America. The number of mares bred to Kentucky stallions increased 0.3 percent compared with the 17,275 reported at this time last year.
Of the top 10 states and provinces by number of mares reported bred in 2018, Kentucky, California, Maryland, and Pennsylvania stallions covered more mares in 2018 than in 2017, as reported at this time last year. The following table shows the top 10 states and provinces ranked by number of mares reported bred in 2018:
|State/Province||2017 Stallions||2018 Stallions||Pct. Change||2017 Mares Bred||2018 Mares Bred||Pct. Change|
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.
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