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Table 1 Number of animals by birth year within each population 1 for cows and bulls

From: Characterizing homozygosity across United States, New Zealand and Australian Jersey cow and bull populations

  Cows 2 Bulls 2
  AU US AU NZ US
1990-1994 2 106 85 174 325
1995-1997 18 61 101 213 271
1998-2000 202 26 132 327 326
2001-2003 871 137 155 403 324
2004-2006 2009 1121 151 365 412
2007-2009 886 3076 90 74 420
≥ 2010 3 3672 175 0 53
  1. 1AU = Australia; US = United States; NZ = New Zealand.
  2. 2Principle component analyses and characterizing the autozygosity between and within populations used animal born within years 2007 to 2009 and 2001 to 2006 for the cows and bulls, respectively. Change in autozygosity across time used cows born after 2002 for the US population and AU cows born from 1990 and 2010. Change in autozygosity across time used bulls born between 1999 to 2008 for AU, NZ, and US.