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Tujuan dari penelitian ini adalah untuk mengetahui aktivitas dan konsumsi pakan kakatua jambul kuning pada masa memelihara anak. Penelitian ini menggunakan sepasang burung kakatua jambul kuning di penangkaran burung Pusat Penelitian Biologi-LIPI. Aktivitas burung diamati menggunakan metode focal animal sampling dengan pencatatan continuous recording. Pengamatan aktivitas dan konsumsi pakan dilakukan pada masa memelihara anak sebanyak 3 kali ulangan yang terdiri dari pengamatan aktivitas selama 30 hari dan untuk konsumsi pakan selama 60 hari untuk masingmasing ulangan, sehingga total waktu pengamatan 270 hari. Pakan diberikan ad libitum, berupa jagung segar (Zea mays), kangkung (Ipomoea aquatic), kelapa (Cocos nucifera), kacang tanah (Arachis hypogaea), wortel (Daucus carota), kedondong (Spondias dulcis), jambu biji (Psidium guajava), tauge (Spigna radiata), kacang panjang (Vigna unguiculata), telur rebus, dan kue burung. Hasil pengamatan menunjukkan bahwa pada masa memelihara anak, aktivitas vokalisasi dan bertengger lebih besar pada jantan daripada betina. Aktivitas bergerak, merawat diri, makan, dan bersarang lebih besar pada betina daripada jantan. Konsumsi pakan yang paling tinggi adalah jagung segar (66,82 g/kelompok/hari) sebagai sumber energi, sedangkan sebagai sumber protein adalah kacang tanah (28,81 g/kelompok/hari) dan telur (15,34 g/ kelompok/hari).

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Abstract. Prijono SN,Rachmatika R, Maharani S. 2021. Feed intake of selected vegetables and fruits by coconut lorikeet (Trichoglossus haematodus) in a colony system. Biodiversitas 22: 4818-4828. Coconut lorikeet (Trichoglossus haematodus (Linnaeus 1771)) is nectarivorous bird. An imbalanced diet is a common problem with lorikeet were kept in captivity. The research method was completely randomized design arranged in a factorial with two factors. The first factor consisted of five types of vegetables or five types of fruits while the second factor consisted of five height levels of feed cup placement (30 cm, 60 cm, 90 cm, 120 cm and, 150 cm from the roof). This  study aimed to get information on the feed intake of selected vegetables and fruits that have high attractiveness to meet nutrient requirements and balanced diet for coconut lorikeets kept in a colony aviary. The feed intake of vegetable soybean (26.68 g) was higher than yardlong bean (21.63 g), green cabbage (19.12 g), red cabbage (16.24 g), and broccoli (14.27 g), while the feed intake of plum (14.15 g) was higher than apple (12.31 g), pomegranate (10.88 g), papaya (10.55 g) and guava (9.82 g). Vegetable and fruit intake by six coconut lorikeets in a colony system were 20.80% of the daily diet, and the siwalan sugar solution was 79.20% of the daily diet. It was suggested that the coconut lorikeets should be fed more vegetables than fruits. A good quality, varied and balanced diet will make the coconut lorikeets healthy and it will support future conservation effort.

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