Judul: Prevalence of Helminthiasis in Deer around IPB Dramaga
Abstrak: Penyakit kecacingan merupakan suatu masalah kesehatan bagi rusa. Infeksi cacing pada rusa dapat menimbulkan berbagai kerugian seperti pertumbuhan terhambat, gangguan reproduksi dan kematian. Data terkait prevalensi kejadian penyakit kecacingan menjadi penting untuk manajemen kesehatan dan pengendalian penyakit pada rusa sehingga dapat meningkatkan produktivitas rusa. Penelitian ini bertujuan mengidentifikasi jenis cacing, serta mengukur prevalensi kejadian kecacingan pada rusa di sekitar kampus IPB Dramaga. Penelitian ini menggunakan total 31 sampel feses rusa. Uji yang dilakukan pada penelitian ini antara lain uji flotasi, McMaster, filtrasi bertingkat dan identifikasi jenis cacing. Hasil penelitian ini menunjukkan bahwa prevalensi kejadian kecacingan pada rusa di sekitar kampus IPB Dramaga sebesar 32.26% dan jenis cacing yang menginfeksinya berasal dari kelas nematoda yakni Trichuris sp. dan Trichostrongylus sp. Sebanyak 6 sampel menunjukkan hasil positif uji McMaster dengan masing-masing jumlah telur yang ditemukan berada dalam rentang 1–499 telur tiap gram tinja (TTGT) sehingga derajat keparahan infeksi tergolong ringan. Program deworming dan manajemen pemeliharaan yang baik perlu diterapkan untuk menghindari peningkatan kejadian kecacingan pada rusa., Helminthiasis is a health concern for deer. Worm infections in deer can cause various losses such as stunted growth, reproductive disorders and death. Data related to the prevalence of helminthiasis is important for health management and disease control in deer so as to increase deer productivity. This study aimed to identify the types of worms, and measure the prevalence of helminthiasis in deer around IPB Dramaga. This study used a total of 31 deer feces samples. Tests conducted in this study include flotation test, McMaster test, multilevel filtration test and identification of worm species. The results of this study showed that the prevalence of helminthiasis in deer around IPB Dramaga was 32.26% and the types of worms that infected them came from the nematode class, namely Trichuris sp. and Trichostrongylus sp. A total of 6 samples showed positive results of the McMaster test with each number of eggs found in the range of 1–499 eggs per gram of feces (EPG) so that the severity of infection was classified as mild. Deworming programs and good husbandry management need to be implemented to avoid an increase in the incidence of helminthiasis in deer.
Keyword: deer, helminthiasis, nematode, prevalence

Judul: Welfare Management and Health Status of Deer at Captivity Hutan Penelitian Dramaga, Bogor
Abstrak: Keberadaan rusa timor (Rusa timorensis), rusa sambar (Cervus unicolor), dan rusa bawean (Axis kuhlii) di alam perlu dipertahankan. Salah satu lembaga yang mendukung kegiatan konservasi eksitu tersebut adalah Penangkaran Rusa Hutan Penelitian Dramaga, Bogor. Penelitian ini dilakukan dengan menilai penerapan manajemen kesejahteraan satwa dan status kesehatan satwa. Data kesejahteraan rusa diperoleh melalui observasi lapang, wawancara dan pengisian kuisioner. Status kesehatan rusa berdasarkan kejadian infeksi cacing saluran pencernaan (helminthosis) diperoleh dengan melakukan pengambilan sampel feses, kemudian dianalisis secara mikroskopis melalui metode McMaster, flotasi sederhana dan saringan bertingat modifikasi. Hasil penelitian menunjukkan bahwa pengelolaan kesejahteraan rusa di penangkaran rusa Hutan Penelitian Dramaga tergolong “baik” dengan skor tingkat kesejahteraan satwa mencapai 73,03. Telur cacing parasit yang ditemukan yaitu Trichuris, Strongyloides dan Trematoda yang menginfeksi rusa, dengan derajat infeksi TTGT tergolong dalam kategori rendah., The existence of timor deer (Rusa timorensis), sambar deer (Cervus unicolor), and bawean deer (Axis kuhlii) in the wild needs to be preserve. One of the responsible institutions in ex-site conservation activities is deer captivity of Dramaga Research Forest, Bogor. The study was conducted to assess the implementation of animal welfare and animal health status. Data of deer walfare management was obtained by field observations, interview, and filling the questionnaire. Deer health status based on the gastrointestinal endoparasites infection (helminthosis) was obtained by collected faecal sample, then it was analyze with microscopic evaluation by McMaster, simple flotation and modification of sedimentation technique. The study shows that deer welfare management in deer captivity of Dramaga Research Forest was classified as a “good” with a score of animal walefare’s level up to 73,03. All animals were parasitized by Trichuris, Strongyloides, and Trematode with low infection intencity level EPG.
Keyword: animal health status, animal walfare, captivity, deer, helminthosis

Judul: Hamiltonian formulation for linear waves motion in two layers fluid
Abstrak: The surface wave could be considered as a wave that separates two fluids, namely water and air. Based on this assumption, it is introduced the interfacial wave, a wave between two layers of fluid with different density. The formulation of interfacial waves motion begins with deriving the base equation of irrotational ideal fluid. Furthermore, according to irrotational fluid assumption, the base equation can be stated in velocity potential. In this derivation, the fluids domain is assumed to be restricted by rigid lid boundary conditions, both at the upper and lower limit. Therefore, the interfacial waves motion can be explained in a hamiltonian formulation. In the hamiltonian formulation, total energy is defined as the sum of kinetic and potential energy. The hamiltonian system is obtained from reduction of kinetic energy by using the Dirichlet Neumann Operator. The resulted kinetic energy equation is nonlinear. Therefore, this form is linearized by first part of the Taylor expansion. This linearization gives a dispersion relation of linear wave. Based on this dispersion relation, the phase speed of the linear wave depends on the density ratio of the two layers fluid.
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