Judul: Kebutuhan pakan benih ikan sidat ( Anguilla sp. ) pada pemeliharaan di Laboratorium
Abstrak: Eel (Anguilla sp) which is known to have a fairly high content of EPA & DHA, along with has a high economic value was found widely in Indonesian waters. This research aims to determine the level of maintenance, optimal and maximal feeding in the rearing of seed eel. This research was conducted in the Laboratory Physiology of Aquatik Animal, FPIK IPB during 42 day. The research using aquarium 60 x 40 x 30 cm, with a volume of 54 liters of water, the weight seed 1-3 grams / fish and feel 10 fish / aquarium. The research implemented 4 treatments of feeding levels and 3 replications feeding levels consisted of 0%, 7%, 14% and 21% of the biomass. The results show that to produce zero growth (maintenance), optimum and maximum growth, requires a feed level respectively : 3.9%, 7.6% and 10%. SR of each treatment was 90%, the highest feed efficiency, resulting in 7% of feeding level treatment.
Keyword: EP., LPBRH, growth of juvenil eel, Maintenance

Judul: Kinerja Produksi Ikan Sidat Anguilla bicolor bicolor Diberi Pakan Berprotein 38,5%, 42,5%, dan 46,5% pada Sistem Kolam Air Mengalir
Abstrak: Eel is a commodity that high value and favored international markets, but production still can not fill market demand. The problems most often occur in the cultivation of eels is on a slow growth, high feed conversion, and low survival rates. The problems affecting the production performance is by increasing maintenance time and cost of production. Fish feed is an important factor in cultivation. Feeding with appropriate levels of protein is expected to increase growth so as to reduce production costs and improve production performance. This study uses a completely randomized design with treatments of feed that has a different protein content, i.e. 38.5%, 42.5%, and 44.5%, respectively repeated 2 times. Fish reared in concrete ponds dimensions 2 m x 2 m x 1.8 m as many as six in a pool of water flowing at the rate of 30 L/min. Eel fish used have a weight of 65.3 ± 2.73 g/fish with a density of 10 kg/m3. Feed given 4 times a day, ie at 05.00, 11:00, 16:00 and 21:00 are at satiation method. Fish maintained for 30 days with sampling every 15 days. Parameters used include survival, growth rate, diversity coefficient weights, feed conversion and water quality. The results showed differences in the protein content of the feed did not significantly affect survival, and diversity coefficient, but the real effect on the growth rate, feed intake and feed conversion. The best treatment (P<0.05) is the feed with protein content of 46.5% resulted in a 0.63% growth rate and ratio feed conversion of 2.18.
Keyword: eel fish, ratio feed conversion, growth, protein content

Judul: Penggunaan Teorema Homeomorphy 2-Manifold dan Teorema Euler Poincare pada Torus 𝑇�� dan Simplicial Complex 𝐾��
Abstrak: Two dimensional topological spaces are said to be homeomorphic if they have the same topological invariant, where one of topological invariant used is an Euler characteristic. Homeomorphy 2-Manifold’s Theorem and Euler Poincare’s Theorem are used to distinguish two topological spaces. Homeomorphy 2-Manifold’s Theorem uses Euler characteristic to identify two dimensional topological spaces. Euler Poincare’s Theorem is an alternative way to find Euler characteristic with Betti number, which is topological invariant as well. The objective of this paper is to investigate the homeomorphism of torus 𝑇����� and simplicial complex 𝐾�����. Topological space torus and simplicial complex 𝐾����� have the same Euler characteristic, which is two. Based on Homeomorphy 2-Manifold’s Theorem topological space torus 𝑇����� and simplicial complex 𝐾����� is homeomorphic.
Keyword: simplicial, torus, Euler, homeomorphism, topology