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EUROPEAN STUDBOOK CROWNED PIGEONS<br />
2.1 Summary of the management data for Goura cristata 2000-<strong>2008</strong><br />
Age distribution<br />
The age of 58 individuals (28 males and 30 females) in the current population was known on 1<br />
<strong>December</strong> <strong>2008</strong>. There were 4 male specimens and 4 female specimens of unknown age.<br />
Current Population size<br />
The current population as of 1 <strong>December</strong> <strong>2008</strong> of the Goura cristata species which participate in<br />
the ESB programme consists of 30.30.4 (Total: 64).<br />
Number of births and deaths<br />
Births Deaths<br />
2000 8 11<br />
2001 7 6<br />
2002 2 1<br />
2003 5 10<br />
2004 9 9<br />
2005 4 4<br />
2006 7 5<br />
2007 4 2<br />
<strong>2008</strong> 5 2<br />
Age of individuals at death during the period 2000-<strong>2008</strong><br />
0-30d 30d-1y 1-5y 5-10y 10-15y 15-20y 20-25y 25y + Total<br />
18 1 8 8 5 2 2 3 47<br />
38% 2% 17% 17% 11% 4% 4% 6% 100%<br />
From 6 pigeons the age is estimated based on date of arrival, thus the age at death could be higher<br />
in reality. The 0-30 day group comprised 38% of all deaths. Circa three-quarter of the Goura<br />
cristata died before the age of 10 years.<br />
Transfers<br />
Transfers<br />
2000 9<br />
2001 6<br />
2002 4<br />
2003 9<br />
2004 4<br />
2005 9<br />
2006 3<br />
2007 3<br />
<strong>2008</strong> 2<br />
Conclusion<br />
Unfortunately in 2000 and 2003 the deaths exceeded the number of births. In the remaining years<br />
the births exceeded the deaths.<br />
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