Judul: Kekerabatan Ikan Famili Gobi di Pantai Selatan Jawa Barat dan Sumbawa Berdasarkan Karakter Morfometrik
Abstrak: Ikan gobi merupakan marga ikan yang mendiami habitat perairan dengan kondisi salinitas berbeda sesuai dengan perkembangan hidupnya, sehingga ikan ini bersifat amphidromus. Ikan gobi mmiliki adaptasi morfologi yang unik berupa sirip perut yang menyatu (pelvic disc). Ikan gobi yang diteliti berasal dari Sungai Sejorong dan Sungai Citepus. Dari dua sungai yang berbeda perlu dilkakukan analisis morfometrik untuk mengetahui kekerabatan ikan gobi antar dua sungai tersebut. Metode yang dilakukan untuk menganalisis morfometrik ikan gobi terdiri dari dua metode, yaitu metode TNA (Truss Network Analysis) dan Metode konvensional. Hasil pengukuran morfometrik yang didapat kemudian diolah menggunakan metode Uji-T, Kruskal-Wallis, Mann-Whitney, Analisis gerombol, dan Analisis diskriminan. Hasil yang didapat dengan menggunakan metode TNA, menunjukkan bahwa terdapat perbedaan karakter antarspesies yang sama dikarenakan memiliki wilayah perairan yang berbeda., Goby fish is a genus of fish that inhabits aquatic habitats with varying salinity conditions according to its life cycle, making it amphidromous. Goby fish has a unique morphological adaptation in the form of fused pelvic fins known as the pelvic disc. The studied goby fish originated from Sejorong River and Citepus River. To determine the relationship between goby fish populations from the two different rivers, a morphometric analysis needs to be conducted. The methods used for analyzing the morphometrics of goby fish include Truss Network Analysis (TNA) and conventional methods. The obtained morphometric measurements are then processed using t-test, Kruskal-Wallis test, Mann-Whitney test, Cluster Analysis, and Discriminant Analysis. The results obtained through TNA method indicate differences in characteristics among the same species due to their different aquatic habitats.
Keyword: relationship, goby fish, morphometric characteristics, phenotypic differences, TNA

Judul: Analisis Keragaman Morfomeristik Ikan Gabus Channa sp. Potensial Budidaya Asal Jawa
Abstrak: Ikan gabus memiliki berbagai keunikan karakter dan manfaat sebagai ikan hias maupun pangan yang bernilai ekonomi sehingga sangat berpotensi untuk dikembangkan sebagai komoditas budidaya. Karakterisasi morfometrik dan meristik menjadi salah satu cara untuk mengevaluasi identitas suatu spesies dan potensi adaptasinya terhadap perbedaan lingkungan hidupnya. Penelitian ini bertujuan menganalisis perbedaan karakteristik morfometrik dan mesristik ikan gabus Channa sp. yang berasal dari tiga lokasi berbeda secara geografis yaitu Jawa Barat, Jawa Tengah, dan Jawa Timur. Hasil pengamatan 29 karakter morfometrik dan 6 karakter meristik menunjukkan bahwa ikan gabus Channa sp. yang berasal dari Jawa Timur memiliki ukuran morfometrik yang lebih besar dibandingkan dengan ikan gabus asal Jawa Barat, sedangkan ikan gabus asal Jawa Tengah berukuran relatif paling kecil, yaitu pada tinggi sirip perut, ukuran kepala, lebar antara kedua tutup insang dan diameter mata. Berdasarkan karakteristik meristik, ikan gabus asal Jawa Barat dan Jawa Timur memiliki kemiripan, sedangkan pada ikan gabus asal Jawa Tengah memiliki jumlah tulang pada sirip anal dan dorsal yang lebih banyak. Perbedaan kualitas air pada masing-masing lokasi diduga menjadi penyebab perbedaan karakter pada ikan gabus asal Jawa., Snakehead fish have various unique characteristics and benefits as ornamental fish and food with economic value, so they have great potential to be developed as a cultivation commodity. Morphometric and meristic characterization is one way to evaluate the identity of a species and its adaptation potential to differences in its living environment. This study aims to analyze differences in morphometric and meristic characteristics of the snakehead fish Channa sp. who came from three geographically different locations, namely West Java, Central Java and East Java. The results of observations of 29 morphometric characters and 6 meristic characters showed that the snakehead fish Channa sp. those from East Java have a larger morphometric size than snakehead fish from West Java, while snakehead fish from Central Java are relatively small in size, namely in height of the pelvic fins, head size, width between the two gill covers and eye diameter. Based on meristic characteristics, snakehead fish from West Java and East Java are similar, while snakehead fish from Central Java have a greater number of bones in the anal and dorsal fins. Differences in water quality in each location are thought to be the cause of differences in the characteristics of snakehead fish from Java
Keyword: Channa sp., cultivation, meristic, morphometric, snakehead fish

Judul: Pembuatan Film Tipis Cu2ZnSnS4 sebagai Lapisan Penyerap Cahaya pada Sel Surya Menggunakan Metode Elektrodeposisi
Abstrak: Thin film of Cu2ZnSnS4 (CZTS) is an alternative semiconductor used as light absorber layer on solar cell. CZTS can replace silicon that commonly used as commercial semiconductor. The advantage of using CZTS as absorber layer is due to the abundance of its chemical composer on earth, and its high value of absorption coefficient. The absorber layer was made by using electrodeposition method on ITO glass substrates. The films were deposited at room temperature using potentiostatic mode with a potential of –1.05 V for 30, 45, and 60 minutes. After that, the films were annealed at two different temperatures, 180 ºC and 500 °C, for 45 minutes in N2/H2S atmosphere. Based on X-ray diffraction analysis, the polycrystalline thin film obtained fall into kesterite crystal phase. This type of crystal was obtained when the CZTS was annealed at 500 °C in H2S/N2 atmosphere. The value of optical band gap energy for the CZTS thin film was 2.2 eV with the film thickness about 1.228–6.366 μm. The sample of CZTS with electrodeposition time of 45 minutes and annealing temperature of 500 °C showed the best result and in conformity with absorber layers criteria for solar cells.
Keyword: semiconductor, ITO glass, CZTS thin film, electrodeposition