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: Kajian Seksualitas dan Domestikasi Tahap Awal Ikan Gabus Hias (Channa limbata, Cuvier & Valenciennes 1831) asal Bogor, Jawa Barat.
Abstrak: Aktivitas penangkapan ikan di alam secara intensif di beberapa wilayah penyebaran ikan gabus menyebabkan penurunan populasi di beberapa wilayah di Indonesia. Praktik budidaya ikan dapat menyelamatkan ikan yang terancam punah dan memproduksi ikan yang terdomestikasi Penelitian ini bertujuan mengkaji tahapan domestikasi awal ikan gabus Channa limbata meliputi aklimatisasi dan status seksualitasnya sebagai dasar pengembangan budidaya ikan gabus hias. Hasil pengamatan dimorfisme seksual ikan C. limbata yang berupa 29 karakter morfometrik, 6 karakter meristik dan ciri lubang urogenital menunjukkan tidak adanya perbedaan nyata antar dua jenis kelamin. Aklimatisasi dilakukan selama 14 hari dengan pemeliharaan pada ukuran yang berbeda yaitu ukuran 50-100mm, 100-150mm dan >150mm. Nilai sintasan terendah pada aklimatisasi didapatkan pada kelompok ikan dengan ukuran >150mm sebesar 75%., The intensive fishing activities in several habitats of snakehead fish have led to a decline in populations in various regions of Indonesia. The practice of fish farming can help save endangered fish populations and cultivate domesticated fish. This research aims to study the initial domestication stages of Channa limbata snakehead fish, including acclimatization and their sexual status, serving as a foundation for the development of ornamental snakehead fish cultivation. Observations of sexual dimorphism in C. limbata involved 29 morphometric characters, 6 meristic characters, and characteristics of the urogenital pore, revealing no significant differences between the two genders. Acclimatization was conducted over 14 days, maintaining fish of different sizes: 50-100mm, 100-150mm, and >150mm. The lowest survival rate was observed in fish group larger than 150mm was at 75%.
Keyword: acclimatization, aquaculture, Channa limbata, domestication, dimorphism

Judul: Prenilasi Senyawa β-Diketon sebagai Prekursor 3-Prenilflavon
Abstrak: One group of flavonoids that has not been commonly synthesized is 3- prenylflavone. The main objective of this experiment was to synthesize precursor of 3-prenylflavone. Firstly, β-diketone was synthesized via 4 steps from phenol as starting compound with total yield of 24%. Prenylation of β-diketone with prenyl bromide and K2CO3 base produced 4 fractions which were separated by using preparative thin layer chromatography (PTLC) with n-hexane:EtOAc (8:2) as the eluent. Fraction with Rf = 0.80 was further separated by using preparative PTLC with n-hexane:EtOAc (99:1) as the eluent. Two fractions were obtained with Rf = 0.38 and 0.42. The first fraction has been characterized as diprenylated β-diketone with 49% yield. Application of protecting group on the phenolic OH group in β- diketone are needed to obtain monoprenylated β-diketone which can be further cyclized into 3-prenylflavone
Keyword: