EEP Crowned pigeon number 4

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EEP STUDBOOK CROWNED PIGEONS Longevity records in crowned pigeons (Goura sp.) Longevity records in common crowned pigeons (Goura cristata ) Ranking Studbooknr. Studbooknr. (Sex) Origin Date Event Age end New Old of 1996 1 1013 3 (M) Wild-caught 1951 Died 26-1-82 Cleveland 31 2 1050 23 (M) Wild-caught 1965 Still alive Washington 31 3 1057 (F) Captive-born 28-2-66 Still alive Berlin 30 Berlin Zoo Zoo 1054*1053 (EEP Nr 6601) 4 1060 30 (F) Wild-caught 1968 Still alive Litchfield 28 5 1065 31 (F) Wild-caught 1968 Still alive S Diego WAP 28 (Wetzel, 1992; Wetzel, 1996; Wetzel, 1998) Longevity records in victoria crowned pigeons (Goura victoria ) Ranking Studbookknr. Studbooknr. (Sex) Origin Date Event Age end New Old of 1996 1 1052 21 (M) Wild-caught 1963 Still alive Philadelphia 32 2 1071 (M) Wild-caught 1969 Still alive Columbia 26 3 1074 35 (M) Wild-caught 1969 Still alive Miami PJ 26 4 1076 (M) Wild-caught 1969 Still alive Weert 26 5 1108 (M) Wild-caught 1972 Still alive Rotterdam 23 (Wetzel, 1992; Wetzel, 1996; Wetzel, 1998) Longevity records in scheepmakers crowned pigeons (Goura scheepmakeri ) Ranking Studbooknr. Studbooknr. (Sex) Origin Date Event Age end New Old of 1996 1 1023 (F) Wild-caught 1965 Still alive Noland 31 2 1030 (?) Captive born 10-7-67 Still alive Tp 29 SDZoo Berlin 3 1033 (F) Wild-caught 1968 Still alive Berlin Zoo 28 4 1016 11 (M) Wild-caught 1961 Died 4-1-85, Memphis 24 5 1017 12 (F) Wild-caught 1961 Died 26-2-84, Memphis 23 6 1052 28 (F) Wild-caught 1974 Still alive Little Rock 22 7 1056 (M) Wild-caught 1974 Still alive Qualicum 21 (Wetzel, 1992; Wetzel, 1996; Wetzel, 1998) 96
EEP STUDBOOK CROWNED PIGEONS 6.4 Comparison in time-budgets between crowned pigeons kept under different housing conditions Introduction Because of the fast growth of the human population, the increase of tourism and the rapid growth of the number of industries, the undisturbed part of the island of New Guinea is declining quickly. Because crowned pigeons are an easy prey to hunters, they disappear everywhere where humans occur. Because remote areas are disappearing very rapidly the number of crowned pigeons in the wild is declining just as fast. Now the numbers are declining very quickly, conservation institutions feel the urge to establish a sustainable population in captivity. Because of the negative natural growth of the population, research is continuously carried out into different aspects of the ex situ husbandry. The most important problem is the low birth rate in captivity. Data from zoological collections show that crowned pigeons must be able to produce and raise three clutches a year in captivity and that they are able to produce fertile eggs for over twenty years. At first sight it should be easy to maintain a stable population in captivity (Nijboer and King, 1996). Unfortunately, the current situation is not prosperous and for that reason the EEP Speciescommittee proposed an ex situ research project into the wellbeing and reproduction of crowned pigeons in captivity. The main problem is the big loss of eggs and squabs, as a result of a lot of infertilized eggs. Furthermore a lot of embryos are dying during incubation. Also a lot of eggs are demolished or thrown out of the nest. Only one out of six eggs will finally deliver a new mature crowned pigeon (Nijboer and King, 1996). Many scientists advice to conduct research into the accessibility of the nest and the care of the parents for the squab (King, Nijboer and Wiersma, 1996; King and Nijboer, 1996). Some of them also state it is important to conduct research into the fact that only a low number of crowned pigeons are producing eggs (King and Nijboer, 1996). Apart from this the condition of the toes of most crowned pigeons seems not to be very well. In most cases the nails are too long or the birds are not able to bow their toes (King, pers. comm.). As a consequence, it is likely that the males have problems to copulate, because they are not able to hold the hen. This should reduce the chance of a successful mating. It might be possible to improve the condition of the feet by changing the thickness of the perches and by using a different kind of substrate. The target of the research project in zoos was to improve the wellbeing of crowned pigeons in captivity by improving the reproduction of crowned pigeons ex situ. To reach that goal the following research questions were formulated: � What is the time budget of crowned pigeons under different circumstances/housing Guinea conditions? � Do the perches influence the well being of them and, as a consequence of that, the reproduction of crowned pigeons? � Does the substrate have any influence on the time budget of crowned pigeons? 97
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European Studbook Number 4 Crowned
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EEP STUDBOOK CROWNED PIGEONS PROLOG
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PROLOGUE 1 2 3 4 SUMMARIES - 5 Tabl
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EEP STUDBOOK CROWNED PIGEONS SUMMAR
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