Judul: Rekayasa rematurasi ikan patin siam Pangasianodon hypophthalmus dengan penyuntikan hormon PMSG dan HCG serta penambahan vitamin mix 300 mg/kg pada pakan
Abstrak: The research was carried out from April to June, 2010 at Babakan Field LaboratoryPonds, Darmaga. The research aimed to increase the rematuration process rate on striped catfish Pangasianodon hypophthalmusthrough a combination of Pregnant Mare Serum Gonadotropin(PMSG)and Human Chorionic Gonadotropin (HCG) hormone injection with 5 and 2,5 IU; 10 and 5 IU;also 20 and 10 IU/kgof spawner body weight dosage combinedwith vitamin mixaddition to fish feed. Sixteen femalestriped catfish spawner were used, consisting of twelve PMSG-treatedspawner and 4 control spawner.This researchused one way single ANOVA with 4treatments and 3 replications. Statistic analysis of observed variables showed unsignificant differences among the three treatments in rematuration parameters. It was resulted that rematuration rate was increased in treatedspawners indicated by a 100% pregnancy. Spawners treated with 10 IU PMSG and 5 IU HCG/kg of spawner body weight along with 20 IU PMSG and 10 IU HCG/kg of spawner body weight dosage was able to reach maturity and spawned with the larval survival rate on the fourth day at 98,63% and 84,81% respectively, thus making 10 IU PMSG and 5 IU HCG/kg of spawner body weight as the best dosage.
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Judul: Rekayasa rematurasi ikan patin siam Pangasianodon hypophthalmus dengan kombinasi penyuntikan hormon PMSG dan HCG serta penambahan vitamin mix 100 mg/kg pakan
Abstrak: The experiment was aimed to increase the rematuration injection of process rate on striped catfish Pangasianodon hypophthalmus through Pregnant Mare Serum Gonadotropin (PMSG) dan Human Chorionic Gonadotropin (HCG) hormone combined with vitamin mix addition to the feed. The experiment was designed with four treatment : (A) Control; (B) PMSG 5 IU and HCG 2,5 IU per kg of fish; (C) PMSG 10 IU and HCG 5 IU per kg of fish; (D) PMSG 20 IU and HCG 10 IU per kg of fish. The fish was fed with commercial pellet which added with 100 mg/kg addition vitamin mix. The result showed that all the fish treatment with hormone mix and vitamin mix have a significant gonadal development, and mature, except control. The fish also have significant on Specific Growth Rate (SGR) and Growth Rate (GR). The dose PMSG 20 IU and HCG 10 IU showed of the optimal treatment for gonadal rematuration for striped catfish.
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Judul: Karakteristik curah hujan DKI Jakarta dengan metode Empirical Orthogonal Function (EOF)
Abstrak: Curah hujan di Indonesia dipengaruhi oleh monsun yang digerakan oleh adanya sel tekanan tinggi dan sel tekanan rendah di benua Asia dan Australia secara bergantian. Dalam bulan Desember hingga Februari (DJF) dibelahan bumi utara terjadi musim dingin akibatnya terdapat sel tekanan tinggi di Benua Asia, sedangkan dibelahan bumi selatan pada waktu ini terjadi musim panas, akibatnya sel tekanan rendah di benua Australia. Karena ada perbedaan tekanan udara di kedua benua tersebut maka pada periode DJF bertiup angin dari tekanan tinggi di Asia menuju ke tekanan rendah di Australia, angin ini disebut monsun barat (winter monsoon). Dalam bulan Juni hingga Agustus (JJA) terdapat sel tekanan rendah di Asia dan sel tekanan tinggi di Australia yang menggerakan monsun timur (suntnter monsoon).
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