Petrov Rusko, Dicheva Andreana
Green Balkans - Stara Zagora NGO, Stara Zagora, Bulgaria Green Balkans - Stara Zagora NGO Stara Zagora Bulgaria.
Trakia University, Stara Zagora, Bulgaria Trakia University Stara Zagora Bulgaria.
Biodivers Data J. 2024 Aug 16;12:e126082. doi: 10.3897/BDJ.12.e126082. eCollection 2024.
After a massive decline, the Griffon Vulture () population in Bulgaria has now stabilised as a result of the hard work of conservation programmes, although it is still listed as an Endangered species (EN) in the country's Red Data Book. Due to a series of unfortunate events, another species - the Cinereous Vulture () became extinct in Bulgaria and recovered only recently due to systematic re-introduction efforts. Along with the poor living conditions, a predisposing factor for the decreasing population of the vultures is the fact they hatch only a single egg; two may be laid on exceptions. The survival rate of the young is from medium to low. In that order, a method of double clutching has been applied in the hope of preserving and retrieving both of the vultures. This article aims to introduce the double clutching method in detail, as well as to show the results of its implementation into the breeding programme of the Cinereous Vulture and the Griffon Vulture at the Wildlife Rehabilitation and Breeding Centre of Green Balkans - Stara Zagora NGO. This research studies the time period 2019-2023. The purpose of this study is to compare the results of natural copulation and hatching and those of the double clutching method. The data taken are used for studies for both the Cinereous and the Griffon Vulture's reproduction in correlation with their feeding programme and living conditions. The results of the study will be summarised into the following text for the purposes of shedding light on the positives of the double clutching method.
经过大幅下降后，由于保护计划的艰苦努力，保加利亚的胡兀鹫（）数量现已稳定下来，尽管它在该国的《红色数据手册》中仍被列为濒危物种（EN）。由于一系列不幸事件，另一个物种——秃鹫（）在保加利亚灭绝，只是最近由于系统性的重新引入努力才得以恢复。除了生活条件恶劣外，秃鹫数量减少的一个诱发因素是它们通常只孵化一枚卵；只有在极少数情况下会产下两枚卵。幼雏的存活率从中等到较低。为此，人们采用了双巢法，希望能保护和挽救这两种秃鹫。本文旨在详细介绍双巢法，并展示其在绿色巴尔干——旧扎戈拉非政府组织野生动物康复与繁殖中心应用于秃鹫和胡兀鹫繁殖计划的成果。本研究的时间段为2019年至2023年。本研究的目的是比较自然交配与孵化的结果以及双巢法的结果。所采集的数据用于研究秃鹫和胡兀鹫的繁殖情况与其饲养计划和生活条件之间的相关性。为了阐明双巢法的优点，研究结果将在以下文本中进行总结。
