Studbook nr. 5, December 2008

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EUROPEAN STUDBOOK CROWNED PIGEONS 4.1 Summary of the management data for Goura victoria 2000-2008 Age distribution The age of 131 individuals (73.5 males and 57.5 females) in the current population was known on 1 December 2008. There were 5 male specimens and 4 female specimens of unknown age. Current Population size The current population as of 1 December 2008 of the Goura victoria species which participate in the ESB programme consists of 72.52.8 (Total: 132). Number of births and deaths Births Deaths 2000 4 8 2001 13 15 2002 12 9 2003 10 19 2004 17 10 2005 15 9 2006 15 8 2007 25 17 2008 12 9 Age of individuals at death during the period 2000-2008 0-30d 30d-1y 1-5y 5-10y 10-15y 15-20y 20-25y 25y + Total 37 11 16 17 15 2 0 1 99 37% 11% 16% 17% 15% 2% 0% 1% 100% From 19 pigeons the age is estimated based on date of arrival, thus the age at death could be higher in reality. The 0-30 day group comprised 37% of all deaths. Less dan 20% of the Goura victoria had become older than 10 years. Transfers Transfers 2000 14 2001 17 2002 8 2003 16 2004 7 2005 9 2006 9 2007 13 2008 14 92
EUROPEAN STUDBOOK CROWNED PIGEONS Conclusion In 2000, 2001 and 2003 the deaths exceeded the number of births. Since 2004 the population of the Goura victoria species is increasing. 4.2 Age distribution Age 73.5 males 57.5 females Figure 4.1: Age distribution of Goura victoria as of 1 December 2008 5 male specimens of unknown age 4 females specimens of unknown age 93
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Studbook nr. 5, December 2008

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