Judul: Food and Feeding Habits of Mahseer (Tor tambra Valenciennes,  1842) in the Cibareno River, Sukabumi, West Java
Abstrak: Ikan badar (Tor tambra) merupakan salah satu ikan air tawar yang bernilai ekonomis tinggi di Indonesia dan dapat ditemukan di Sungai Cibareno, Sukabumi, Jawa Barat. Pembangunan Bendung Caringin di Sungai Cibareno dapat menimbulkan ancaman bagi populasi ikan badar. Tujuan dari penelitian ini adalah menganalisis makanan dan kebiasaan makan ikan badar di Sungai Cibareno. Penelitian ini dilakukan selama empat bulan (Mei, Juni, Juli, dan September 2022) di enam lokasi di Sungai Cibareno. Parameter yang diamati adalah hubungan panjang-bobot, faktor kondisi, indeks bagian terbesar, luas relung, dan morfometrik ikan yang berkaitan dengan kebiasaan makan ikan. Hasil penelitian ini menunjukkan ikan badar memiliki pola pertumbuhan isometrik dengan faktor kondisi yang baik. Makanan utama ikan badar adalah larva serangga air, dengan cacing tanah dan fitoplankton sebagai makanan pelengkap serta biji tumbuhan sebagai makanan tambahan. Hasil ini didukung oleh data morfometrik ikan yang menunjukkan bahwa ikan badar adalah ikan omnivora cenderung karnivora. Selain itu, ikan badar adalah ikan yang mencari makan di siang hari (diurnal)., Tor tambra is one of the most economically valuable freshwater fish in Indonesia and can be found in the Cibareno River, Sukabumi, West Java. The construction of the Caringin weir on the Cibareno River may pose threats to the fish population. The objective of this study was to analyze food and feeding habits of Tor tambra in Cibareno River. This study was conducted for four months (May, June, July, and September 2022) at six locations in Cibareno River. The parameters observed were length-weight relationship, condition factor, index of preponderance, niche breadth, and fish morphometrics related to fish feeding habits. The results showed that Tor tambra had isometric growth pattern with good condition factor. The main food of Tor tambra is aquatic insects, with earthworms and phytoplankton as supplementary food and plant seeds as additional food. These results are supported by fish morphometric data that Tor tambra is an omnivorous fish that tends to be carnivorous. In addition, Tor tambra is a diurnal forager.
Keyword: feeding habits, sustainability, food, Cibareno River, Tor tambra

Judul: Food and Feeding Habits of Menga Fish (Sicyopterus lagocephalus Pallas, 1770) in Cibareno River, Sukabumi, Jawa Barat
Abstrak: Sungai Cibareno merupakan salah satu sungai yang bermuara di teluk Palabuhanratu, Jawa Barat. Di Sungai Cibareno direncanakan akan dibangun bendungan yang bernama Bendung Caringin. Adanya bendungan ini diperkirakan dapat memberikan dampak pada ekosistem seperti perubahan kualitas air dan kondisi habitat Sungai Cibareno. Penelitian ini bertujuan untuk mengkaji ekologi trofik ikan menga di Sungai Cibareno dan hasil penelitiannya diharapkan dapat dijadikan dasar dalam mengelola ikan menga khususnya di Sungai Cibareno. Pengambilan sampel dilakukan pada bulan Mei hingga September 2022 di bagian hulu dan hilir Sungai Cibareno. Hasil penelitian menunjukkan bahwa ikan menga merupakan ikan herbivora dengan makanan nabati sebesar 95,4265% dan makanan hewani sebesar 5,0969%. Semakin besar ukuran ikan menga, komposisi nabati semakin meningkat. Ikan menga di bagian hilir ditemukan cenderung lebih memiliki variasi dan jumlah makanan yang lebih tinggi dibandingkan dengan ikan menga di bagian hulu. Berdasarkan luas relung dan tumpang tindih makanan, ikan menga tergolong kedalam ikan generalis yang memiliki peluang persaingan antar ukuran yang tinggi dalam mencari makanan ketika terjadi kelangkaan pakan. Hasil analisis isi saluran pencernaan menunjukkan bahwa ikan menga tergolong ikan herbivora dan aktif mencari makan di dasar perairan pada malam hari., Cibareno River is one of the river that flow into Palabuhanratu Bay, West Java. There are plans to construct an irrigation weir on Cibareno River named Bendung Caringin. The construction of this weir could impact the ecosystem, potentially water quality and habitat condition in Cibareno River. This research aims to study the trophic ecology of red-tailed goby in Cibareno River with the result serving as a management standard for this species particularly at this river. Sample collection was carried out from May to September 2022 at both upstream and downstream of the river. The result indicates that the red-tailed goby is herbivorous with starch content of 95,4265% and animal content of 5,0969%. The starch content increases the size of the fish. The downstream red-tailed goby tend to have a greater variety and quantity of food compared to their upstream counterpart. Based on niche breadth and niche overlap, this species are categorized as a generalist, with a high potential for competition for food resource during periods of scarcity. The result of red-tailed goby digestive tract content suggest it primarily herbivorous and actively foraging foods in the water bottom at night.
Keyword: Food, Feeding Habits, Cibareno River, Sicyopterus lagocephalus

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
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