scholarly journals Grouping behavior of Sumatran orangutans ( Pongo abelii ) and Tapanuli orangutans ( Pongo tapanuliensis ) living in forest with low fruit abundance

2020 ◽  
Vol 82 (5) ◽  
Author(s):  
Tom S. Roth ◽  
Puji Rianti ◽  
Gabriella M. Fredriksson ◽  
Serge A. Wich ◽  
Matthew G. Nowak
Keyword(s):  
Fruit Abundance ◽  
Pongo Abelii ◽  
Grouping Behavior

Picture processing in orangutans (Pongo abelii)

2011 ◽  
Author(s):  
Catherine Reeve ◽  
Heidi Marsh ◽  
Suzanne MacDonald
Keyword(s):  
Picture Processing ◽  
Pongo Abelii

Preference for free or forced choice in Sumatran orangutans ( Pongo abelii )

2020 ◽  
Vol 113 (2) ◽  
pp. 419-434
Author(s):  
Sarah E. Ritvo ◽  
Suzanne E. MacDonald
Keyword(s):  
Forced Choice ◽  
Pongo Abelii

The development of wild immature Sumatran orangutans (Pongo abelii) at Ketambe

Primates ◽  
2006 ◽  
Vol 47 (4) ◽  
pp. 300-309 ◽  
Author(s):  
Gijsbertus G. J. van Adrichem ◽  
Sri Suci Utami ◽  
Serge A. Wich ◽  
Jan A. R. A. M. van Hooff ◽  
Elisabeth H. M. Sterck
Keyword(s):  
Pongo Abelii

scholarly journals Altitudinal movements and conservation of Bare-necked Umbrellabird Cephalopterus glabricollis of the Tilarán Mountains, Costa Rica

2003 ◽  
Vol 13 (1) ◽  
pp. 45-58 ◽  
Author(s):  
Johel Chaves-Campos ◽  
J. Edgardo Arévalo ◽  
Mariamalia Araya
Keyword(s):  
Costa Rica ◽  
Breeding Season ◽  
Protected Area ◽  
Radio Telemetry ◽  
Fruit Breeding ◽  
Potential Threat ◽  
Fruit Abundance ◽  
Transect Counts ◽  
Using Data ◽  
High Elevations

Bare-necked Umbrellabird Cephalopterus glabricollis is endemic to Costa Rica and western Panama. It eats fruit, breeding at high elevations (≥ 800 m) and migrating to lower elevations during the non-breeding season. Using data from transect counts and radio-telemetry, we monitored bird movements in a protected area (Monteverde–Arenal–San Ramón reserves) in the Tilarán Mountains, Costa Rica. We also monitored fruit abundance along an altitudinal gradient to explore the potential relationship between bird movements and the abundance of the fruits this species consumed. The presence and abundance of umbrellabirds at high elevations (1,400 m) during the breeding season (March–June) coincided with the highest peak of fruit abundance. The presence of umbrellabirds in the lowlands (400 m) during the non-breeding season overlapped with the period of highest fruit abundance at these elevations. At middle elevations, bird presence and abundance did not correlate with fruit abundance. Radio-tagged birds left the protected area during the non-breeding season and there were no umbrellabirds inside the protected area during this period. Habitats where this species bred were well represented in the protected area but the habitat where they spent the non-breeding season was poorly represented, and was not adequately protected. This represents a potential threat to this species in the Tilarán Mountains.

Estimators of Fruit Abundance of Tropical Trees

Biotropica ◽  
1992 ◽  
Vol 24 (4) ◽  
pp. 527 ◽  
Author(s):  
Colin A. Chapman ◽  
Lauren J. Chapman ◽  
Richard Wangham ◽  
Kevin Hunt ◽  
Daniel Gebo ◽  
...  
Keyword(s):  
Tropical Trees ◽  
Fruit Abundance

scholarly journals IDENTIFIKASI PARASIT NEMATODA GASTROINTESTINAL ORANGUTAN SUMATERA (Pongo abelii) DI KARANTINA BATU MBELIN, SIBOLANGIT PROVINSI SUMATERA UTARA

2013 ◽  
Vol 7 (2) ◽  
Author(s):  
Ichsan Taufik Nasution ◽  
Yudha Fahrimal ◽  
Muhammad Hasan
Keyword(s):  
Pongo Abelii

Penelitian ini bertujuan mendapatkan informasi serta mengetahui jenis-jenis parasit gastrointestinal pada feses orangutan sumatera (Pongo abelii) yang berada di Karantina Batu Mbelin Sibolangit, Provinsi Sumaetra Utara. Sampel yang diambil berupa feses dari 30 ekor orangutan sumatera yang berada di Karantina Batu Mbelin, Sibolangit Provinsi Sumatera Utara. Kemudian sampel feses segar diawetkan dengan menggunakan cairan sodium-acid-formalin (SAF). Selanjutnya sampel feses diperiksa di Laboratorium Parasitologi Fakultas Kedokteran HewanUniversitas Syiah Kuala. Metode Pemeriksaan yang digunakan dalam penelitian ini adalah uji sentrifus dan uji sedimentasi untuk mengetahui keberadaan parasit nematoda gastrointestinal. Data yang diperoleh dianalisis secara deskriptif. Hasil pemeriksaan laboratorium dari 30 sampel feses orangutan sumatera (Pongo abelii) menunjukkan bahwa 10 sampel positif adanya telur cacing nematoda gastrointestinal dengan jenis infeksi tunggal oleh Ascaris sp. (26,6%) dan Oesophagostomum sp. (6.6%), dan infeksi ganda Ascaris sp. dan Oesophagostomum sp. (0%). Penelitian ini memberikan kesimpulan bahwa terdapat parasit nematoda  gastrointestinal  Ascaris sp. dan Oesophagostomum sp.  pada 10 sampel feses orangutan sumatera (Pongo abelii) di Karantina Batu Mbelin, Sibolangit Provinsi Sumatera Utara

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