Hernowo JB. 2017. Population analysis of Bali Mynah (Leucopsar rothschildi Stresemann 1912) released in 2007 in Bali Barat National Park, Indonesia. Trop Drylands 1: 83-89. The population of Bali Mynah (Leucopsar rothschildi) has been released in the year 2007 in Bali Barat National Park should be monitored. Monitoring of the Bali Mynah (BM) population development was done in June 2008, June 2009 and October 2009. Monitoring method employed was direct observation focused on rations feeding site and surrounding areas at Tanjung Gelap (Menjangan Resort). The individual number that was released in June 2008 was 20 individuals, and that in June 2009 and October 2010 was, respectively, 20 individuals and 22 individuals. The Bali Mynah survival is approximately 77.27-110.53% in two respective years. The bird natality rate is 10.53%. The sex ratio is about 1:1 and birds age structure are 95.24% adult and 4.76% sub adult. The over-all population of Bali Mynah (BM) at Tanjung Gelap is in good condition. The important factors that support Bali Mynah survival in the wild habitat is through managed nest box, food rations, and BM safety.

Hernowo JB, Alikodra HS, Mardiastuti A, Kusmana C (2011) Population analysis of the javan green peafowl (Pavo muticus muticus Linnaeus 1758) in Baluran and Alas Purwo National Parks,. The javan green peafowl (Pavo muticus muticus) have high pressure to the population and the habitat. The distribution of the bird at Java Island is clumped randomly at several types in condition of fragmented and isolated habitat and it has small individual number every unit population. Baluran and Alas Purwo National Parks are one of distribution javan green peafowl; it was chosen for study on the population analysis. The research was aimed to gain data and information on demographic population of javan green peafowl. The individual number of the bird was counted by call count transect method and councentration count. The population demographic parameter (individual number, age structure and sex ratio) of javan green peafowl was analyzed. The result shown that individual number of the javan green peafowl at Baluran National Park (BNP) was 69.1 birds (in 2006) and 70.5 birds (in 2007) not much differ, but it compared with the observation in1995 approximately was 117.7 birds had significant different. The green peafowl population at BNP declined around 47.50% during 12 years. Meanwhile the population at Alas Purwo National Park (APNP) was 80.7 birds (in 2006) and 73.5 birds (in 2007), if compared to observation in 1998 only 43 birds and in 2006 was 80.0 birds, the population grow up 86.05% during 8 years. The age structure of population indicated that both population (BNP and APNP) tend to unbalance pyramidal, where adult birds more abundance than sub adult or juvenile. The birds sex ratio at both (APNP and BNP) indicated that the peafowl life in polygyny system 1 male: 4 female > 1 male: 2.5 female.

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Abstract. Hernowo JB. 2017. Determinant factors of the javan green peafowl (Pavo muticus muticus) Linnaeus 1758 habitat in Baluran and Alas Purwo National Parks, East Java,. Baluran National Park (BNP) and Alas Purwo National Park (APNP) are habitats of the natural distribution of the javan green peafowl population. The javan green peafowl chose certain places in BNP and APNP at several habitat types for their local distribution. The habitat types selected by the birds for their distribution in Baluran were savanna, beach forest, and monsoon forest. Meanwhile, in Alas Purwo, the peafowl birds were distributed at grazing area and intercropping teak plantations. The habitat types selected by the javan green peafowl in BNP and APNP were those that are comfort and save for the birds' living. The present research aimed to obtain data and information on determinant factors of habitat influence on the presence of the bird at the habitat types. The Principal Component Analysis (PCA) was used to analyze determinant factors of habitat component. The results showed that the determinant factors of the javan green peafowl habitat in BNP were the density of shelter, the density of food, the number of roost tree and the height of roost tree. Meanwhile, in APNP, the determinant habitat factors were the number of roost tree, the height of roost tree, and the number of continuously available water.

Citron-crested cockatoo (Cacatua sulphurea citrinocristata) is one of endemic bird which endangered in Sumba islands and protected by in law. The study was aimed to analyze the determinants factor of the captive breeding success of citron-crested cockatoo. The research was conducted in January-March 2018, in Mega Bird and Orchid Farm Bogor, Ragunan Zoo, Rahardjo Bird Farm Solo, and Cikembulan Zoo. Determinant factor of the captive breeding success of citron-crested cockatoo were analyze using PCA with SPSS 22 software. The main components which are important factors for captive breeding success of Citron-crested cockatoo were breeding techniques (feed, time of handling, the number of productive parent and capital), condition of citron-crested cockatoo cage (temperature and humidity) and human resources (duration time of the breeding and knowledge of the keeper). Keywords: captive breeding, citron-crested cockatoo,  principal component

Batu Ampar mangrove is an important bird habitat especially for birds which have relation to mangrove ecosystem in West Kalimantan. The research was conducted in February to March 2007, at mangrove Batu Ampar demo site. Sampling was done to get representative area for bird survey. The 19 transects were chosen as sampling site to collect bird data such as species and number of individual. Bird surveys were carried out using Reconnaissance method and IPA (Index Point of Abundance) count method. The length of each transect was approximately 500 m. The results showed that the bird community's structure dominated by insectivorous birds represented approximately 60 % of total bird's species at mangrove Batu Ampar demo site. The abundance numbers of the individual with the bird's species has relation pattern like J opposite. Percentage of dominant bird species was approximately 11 %, those are such as stork billed kingfisher, white-collared kingfisher, common iora, chestnuts-rumped babbler, Strip-Tit Babbler, magpie robin, ashy tailorbird, mangrove blue flycatcher, pied fantail, mangrove whistler, Brown-throated Sunbird and Cooper-Throated Sunbird. Vertical structure of mangrove vegetation was used by birds at mangrove Batu Ampar demo site is mainly B stratum, and it used around 60 % birds species. Based on dendrogram analysis there were 5 cluster birds species. The mangrove bird specialists found at sampling area were mangrove blue flycatcher and Cooper throated sunbird.

Pantai Trisik merupakan area lahan basah yang terletak di bagian selatan Daerah Istimewa Yogyakarta. Kawasan Pantai Trisik berperan penting bagi kehidupan burung pantai. Tujuan penelitian yaitu menganalisis komunitas dan guild pakan komunitas burung di kawasan Pantai Trisik. Penelitian dilaksanakan pada Bulan Oktober 2018 – Januari 2019 dengan teknik point count. Komunitas burung pantai di kawasan Pantai Trisik terdiri dari 22 jenis yang terbagi menjadi burung pantai migran dan residen. Tipe guild komunitas burung pantai di kawasan ini terbagi menjadi tiga kelompok guild pakan yaitu mollucivore, insectivore dan omnivore. Berdasarkan cara mendapatkan makanan, tipe guild mollucivore dikembangkan menjadi tiga tipe subguild. Tipe guild insectivore terdiri dari satu tipe guild.  Tipe guild omnivore dikembangkan menjadi sepuluh tipe. Tipe guild yang paling banyak ditemukan adalah tipe guild omnivore sebanyak 17 jenis (77%).   Kata kunci: komunitas burung, guild, burung pantai, kekayaan jenis

Straw-headed bulbul (Pycnonotus zeylanicus) is a popular singing bird widely traded in Indonesia. Captive breeding is one of the conservation efforts to increase the population outside the natural habitat, therefore, research on captive breeding models is important. The objective of the study is mainly to describe the management and determine the model of straw-headed bulbul captive breeding. The study was conducted on May-July 2015 in 10 different captive breeding facilities in Bogor and Depok Districts. Data were collected through observations, measurement, and interview. Principal Components Regression with the stepwise methods was used to analyze the success model of captivity breeding. The study found that the captive breeding management has been operated appropriately to ensure its productivity, as demonstrated by the natality and mortality models. The natality model Y1 = 64.70 + 57.48 PC1 showed that captivity duration, higher parent productivity, and higher egg hatchability increase natality rate. The mortality model, Y2 = 19.10 -4.23 PC2, showed that greater operational and capital costs incurred as well as longer treatment duration are able to suppress mortality.Key words: Captive breeding, management, principal components regression, straw-headed bulbul, success model. ABSTRAKBurung Cucak rawa (Pycnonotus zeylanicus, Gmelin 1789) merupakan salah satu burung berkicau terkenal dan marak diperdagangkan di Indonesia. Upaya konservasi untuk meningkatkan populasi di luar habitat alaminya adalah melalui penangkaran sehingga penelitian mengenai model keberhasilan penangkaran penting untuk dilakukan. Penelitian ini bertujuan untuk mendeskripsikan manajemen penangkaran pada lokasi penelitian dan menentukan model keberhasilan penangkaran cucak rawa. Penelitian dilakukan pada sepuluh penangkaran yang berlokasi di Kabupaten Bogor dan Depok. Penelitian dilakukan selama tiga bulan mulai Mei hingga Juli 2015. Pengumpulan data dilakukan melalui pengamatan langsung, pengukuran, dan wawancara. Data selanjutnya dianalisis menggunakan regresi komponen utama dengan metode stepwise untuk menentukan model keberhasilan. Hasil studi menunjukkan bahwa manajemen penangkaran yang sudah beroperasi hingga saat ini dinilai tepat untuk memenuhi kebutuhan produktivitas, seperti yang ditunjukkan dalam model perkembangan reproduksi berdasarkan angka kelahiran dan kematian. Model kelahiran Y1 = 64,.70 + 57,48 PC1 menunjukkan bahwa semakin lama menangkarkan, jumlah induk produktif banyak, dan daya tetas telur tingi maka semakin besar kelahiran. Model kematian Y2 = 19,10 -4,23 PC2 menunjukkan bahwa semakin besar biaya operasional dan modal serta semakin lama durasi waktu perawatan maka angka kematian dapat ditekan.Kata kunci: Penangkaran, manajemen, regresi komponen utama, cucak rawa, model keberhasilan. I. PENDAHULUANCucak rawa (Pycnonotus zeylanicus, Gmelin 1789) termasuk ke dalam famili Pycnonotidae dari ordo Passeriformes yang dikenal dengan merbah atau cucakcucakan. Populasi cucak rawa mengalami penurunan tajam karena marak di...