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Productivity constraints on Citron-crested Cockatoos in a rich community of large hole-nesting birds

Avian Research 2022年第1期13卷 25-35页

作者： Anna Reuleaux Benny A.Siregar Nigel J.Collar Ani Mardiastuti Stuart J.Marsden Department of Natural Sciences Manchester Metropolitan UniversityManchesterUK burung indonesia BogorIndonesia BirdLife International CambridgeUK Bogor Agricultural University(IPB University) BogorIndonesia

Knowledge of breeding success and its limiting factors is crucial in assessing species’conservation *** cavity-nesters,parrots are particularly influenced by the availability of suitable cavities and low breeding output,whether due to natural processes or *** the island of Sumba,indonesia,the Critically Endangered Citron-crested Cockatoo(Cacatua citrinocristata)has the added problem of co-existing with an unusually rich hole-nesting bird community in a forested environment much constrained by habitat *** monitored 95 nesting cavities of cockatoos and their competitors and potential nest-predators,over one to four breeding seasons,using a combination of camera-traps,direct checks on nest contents,and observations from the *** for suitable cavities was intense among three large parrot species,two owls and a *** rates by potential competitors were higher at unoccupied cavities than at those containing active nests,reflecting the guarding behaviour of the *** Endangered Sumba Hornbill(Rhyticeros everetti)dominated observed direct confrontations and was the most frequent visitor to active parrot nests,suggesting a further role as a potential *** prospected many cavities but rarely then attempted to nest:instead the sites were usually occupied by other cavity-nesters,or by *** the few cavities where cockatoos did breed,predation pressure was likely low,and observed success rate high(10 successful of 15 nests),although the low number of nests found early in the breeding cycle suggests that some may have failed before *** competition for cavities suggests a shortage of suitable nest-sites,the need for preservation of old hole-bearing trees and a role for ***,known,safe artificial nest-sites would also provide opportunities to assess the scale of nest-site shortage,allow camera placements to study productivity,exclude some competitors and predators,and prevent ill

关键词： Camera-traps Competition Conservation Hornbills Parrots Predation

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A Review of Recent Knowledge on Raptor Species in Sumatra, indonesia

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Journal of Life Sciences 2012年第5期6卷 528-535页

作者： Hilda Zulkifli Muhammad Iqbal Adam A. Supriatna Agus Nurza Department of Biology Sriwijaya University Indralaya 30662 Indonesia Kelompok Pengamat burung Spirit of South Sumatra Palembang 30152 Indonesia indonesian Ornithologists' Union (IdOU) Bogor 16001 Indonesia Cicem Nangroe Banda Aceh 23111 Indonesia

A review of recent knowledge on raptor species in Sumatra (indonesia) is discussed here. It summarized 34 raptor species recently known from Sumatra, updating previous 32 species. A total of 19 species was recorded resident in Sumatra, eight endemic subspecies, and 18 migratory species. The resident raptors in Sumatra have different breeding seasons. There are three raptors breeding in dry season, three between dry to rainy season, two raptors in rainy season and five raptors breeding between rainy to dry season. Most raptors in Sumatra breeds between rainy to dry season, consistent with major period of breeding season of bird in Sumatra. Four species have been listed as vulnerable and near threatened by IUCN. All indonesian raptors have been protected by the indonesian law. Therefore, this information will provide more significant recent knowledge of the raptor species in Sumatra to be used for updating the conservation status and preparing long term monitoring activities to support the conservation of Sumatran tropical forests.

关键词：苏门答腊岛猛禽印尼知识世界自然保护联盟繁殖季节印度尼西亚法律保护

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