Judul: Penggunaan Cacing Tanah (Lumbricus rubellus) pada Pancing Ulur yang Dioperasikan Malam Hari di Teluk Palabuhanratu.
Abstrak: Penelitian ini bertujuan untuk mengetahui komposisi total hasil tangkapan ikan, menganalisis pengaruh umpan cacing tanah yang dioperasikan malam hari dengan umpan yang biasa nelayan gunakan di Teluk Palabuhanratu dan menganalisis pengaruh perbedaan waktu penangkapan perjenis ikan dominan. Penelitian ini menggunakan metode uji coba penangkapan (experimental fishing) dengan 20 kali ulangan (trip). Komposisi hasil tangkapan terdiri atas 9 jenis ikan dengan jumlah total 201 ekor yang didominasi oleh ikan kuwe (Caranx sp) sebanyak 67 ekor atau 33.3%, terapon (Terapon jarbua) sebanyak 29 ekor atau 14.4%, kakap (Lutjanus sp) sebanyak 26 ekor atau 12.9%, dan kerapu (Epinephelus pachycentru) sebanyak 20 ekor atau 10.0%. Perbandingan hasil tangkapan pancing ulur berbeda pada setiap perlakuan dengan menggunakan kedua jenis umpan. Pancing ulur dengan menggunakan umpan ikan tembang memberikan jumlah hasil tangkapan sebanyak 115 ekor atau 57.2% dan menggunakan umpan cacing tanah sebanyak 86 ekor atau 42.8%. Jenis umpan memberikan pengaruh nyata terhadap jumlah total hasil tangkapan dengan selang kepercayaan 95%.
Keyword: cacing tanah, komposisi hasil tangkapan, malam hari, pancing ulur, umpan

Judul: Penggunaan Cacing Tanah (Lumbricus rubellus) Sebagai Umpan Alternatif Pancing Ulur (Hand line) Di Teluk Palabuhanratu
Abstrak: The research was designed in order to compare the catch of hand line with different baits, i.e earthworm and fish which ussually used bay fishermen in Palabuhanratu bay. This research is implementing an experimental fishing with 19 trips. Composition of the catches is consisted by 6 species with total catches of 157 fishes and dominated by layang (Decapterus kurroides) 81 fishes or 51.26%, swanggi (Priacanthus tayenus) with 42 fishes or 26.58%, kurisi (Nemipterus hexodon) with 21 fishes or 12.29%, kuwe (Caranx sp) with 10 fishes or 6.33%, petek (Leiognathus sp) with 2 fishes or 1.26%, and baracuda (Sphyraena sp) with 1 fishes or 0.63%. Comparison of hand line catches is different by used of two bait types, hand line with sardines bait is giving result of catches by 93 fishes or 59.2%. Meanwhile, in hand line with worm bait is giving result of chatches by 64 fishes or 40.8%. There was significant differences (α = 5%) in total catches between the hand line with fish bait and worm bait
Keyword: Bogor Agricultural University (IPB), Catches compotition, Earthworm, Bait, Hand line

Judul: Dynamical System of Hepatitis B in Three Groups with Vaccination
Abstrak: The aim of this study is to modify the hepatitis B transmission model in three age groups involving vaccination from the model conducted by Zhoe and Zhang.The method used is to analyze the stability of the fixed point and its basic reproduction number (R_0). Performed stability analysis and numerical simulation to see population dynamics. Next, a sensitivity analysis of the parameters was carried out to see its effect on R_0. From the analysis obtained two fixed points, namely non-endemic and endemic fixed points. Non-endemic fixed points are locally asymptotically stable if R_0 <1 Meanwhile, the endemic fixed point is locally asymptotically stable if R_0 > 1. Hepatitis vaccination affects the number of susceptible population, because the more successful the vaccination, the smaller the number of susceptible populations so that the smaller the population will be infected.
Keyword: Dynamic, Hepatitis B, Vaccine, Mathematical model