AbstractThe reasons for catastrophic declines of Sumatran rhinos are f translation - AbstractThe reasons for catastrophic declines of Sumatran rhinos are f Indonesian how to say

AbstractThe reasons for catastrophi

Abstract

The reasons for catastrophic declines of Sumatran rhinos are far from clear and data necessary to improve decisions for conservation management are often lacking. We reviewed literature and assembled a comprehensive data set on surveys of the Sumatran rhino subspecies (Dicerorhinus sumatrensis harrissoni) in the Malaysian state of Sabah on Borneo to chart the historical development of the population in Sabah and its exploitation until the present day. We fitted resource selection functions to identify habitat features preferred by a remnant population of rhinos living in the Tabin Wildlife Reserve in Sabah, and ran a series of population viability analyses (PVAs) to extract the key demographic parameters most likely to affect population dynamics. We show that as preferred habitat, the individuals in the reserve were most likely encountered in elevated areas away from roads, in close distance to mud-volcanoes, with a low presence of human trespassers and a wallow on site, and within a neighbourhood of dense forest and grassland patches preferably on Fluvisols and Acrisols. Our population viability analyses identified the percentage of breeding females and female lifetime reproductive period as the crucial parameters driving population dynamics, in combination with total protection even moderate improvements could elevate population viability substantially. The analysis also indicates that unrestrained hunting between 1930 and 1950 drastically reduced the historical rhino population in Sabah and that the remnant population could be rescued by combining the effort of total protection and stimulation of breeding activity. Based on our results, we recommend to translocate isolated reproductively healthy individuals to protected locations and to undertake measures to maximise conceptions, or running state-of-the-art reproductive management with assisted reproduction techniques. Our study demonstrates that a judicious combination of techniques can do much to illuminate causes of population declines, improve decision making for conservation management and possibly prevent similar developments in populations of other species of similar ecological standing.
Keywords

Megaherbivore; Sumatran rhino; Conservation; Extinction; Resource selection function; Population viability analyses
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AbstrakAlasan untuk bencana penurunan Badak Sumatera yang jauh dari jelas dan data yang diperlukan untuk meningkatkan keputusan untuk manajemen konservasi sering kurang. Kami meninjau sastra dan berkumpul lengkap data pada survei subspesies badak Sumatra (Dicerorhinus sumatrensis harrissoni) di negara bagian Malaysia Sabah di Kalimantan untuk memetakan perkembangan sejarah penduduk di Sabah dan eksploitasi yang sampai hari ini. Kami dilengkapi fungsi-fungsi pemilihan sumber daya untuk mengidentifikasi fitur habitat yang disukai oleh sisa populasi badak yang tinggal di Margasatwa silam di Sabah, dan berlari serangkaian populasi analisis kelangsungan hidup (PVAs) untuk mengekstrak parameter demografis kunci yang paling mungkin untuk mempengaruhi dinamika populasi. Kami menunjukkan bahwa sebagai habitat yang disukai, individu-individu dalam cadangan yang paling mungkin ditemui di daerah ditinggikan dari jalan, dalam jarak dekat ke Lumpur-gunung berapi, dengan kehadiran rendah penyusup manusia dan wallow situs, dan dalam lingkungan yang padat hutan dan padang rumput patch pada Fluvisols dan Acrisols. Analisis kelayakan populasi kami diidentifikasi persentase pembiakan wanita dan periode reproduksi perempuan seumur hidup sebagai parameter penting yang mengemudi dinamika populasi, dalam kombinasi dengan perlindungan total bahkan moderat perbaikan dapat meningkatkan populasi kelangsungan hidup secara substansial. Analisis ini juga menunjukkan bahwa tak terkendali berburu antara 1930 dan 1950 secara drastis mengurangi populasi badak sejarah di Sabah dan sisa penduduk bisa diselamatkan dengan menggabungkan upaya perlindungan total dan stimulasi pembiakan aktivitas. Berdasarkan hasil kami, kami sarankan untuk translocate terisolasi reproduktif sehat individu untuk lokasi yang dilindungi dan untuk melakukan langkah-langkah untuk memaksimalkan konsepsi, atau menjalankan manajemen reproduksi negara-of-the-art dengan teknik reproduksi dibantu. Penelitian kami menunjukkan bahwa kombinasi bijaksana teknik dapat berbuat banyak untuk menerangi penyebab penurunan populasi, meningkatkan keputusan manajemen konservasi dan kemungkinan mencegah perkembangan serupa dalam populasi spesies lain berdiri ekologi yang serupa.Kata kunci Megaherbivore; Badak Sumatra; Konservasi; Kepunahan; Sumber daya seleksi fungsi; Analisis kelangsungan hidup penduduk
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