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"Objectives of the study was to discover genetic variability and genetic relationship of paternal half sib population of nile tilapia (Oreochromis niloticus) under selection program scheme at research Institute for Freshwater Aquaculture,in Bogor West Java...."

"Objective of the study is to elucidate phenotype characters of nile tilapia (Oreochromis niloticus) of the third generation (G3) resulted from the selection breeding program in the research institute for freshwater aquaculture Bogor...."

"Waduk Ria Rio, Jakarta Timur merupakan waduk yang dimanfaatkan masyarakat untuk penangkapan ikan. Penangkapan ikan yang terus menerus dapat menyebabkan penurunan kepadatan ikan yang ada di Waduk Ria Rio. Salah satu ikan yang sering tertangkap oleh pemancing yaitu ikan nila (Oreochromis niloticus) yang mampu hidup pada kondisi lingkungan yang luas dan dapat menyesuaikan dengan jenis makanan yang tersedia. Penelitian ini bertujuan untuk mengetahui kebiasaan makanan (food habit) ikan nila (Oreochromis niloticus) di Waduk Ria Rio. Penelitian kebiasaan makanan ikan meliputi pengukuran panjang tubuh dan berat ikan, serta panjang usus dan berat pencernaan. Penelitian ini menggunakan metode purposive sampling untuk pengambilan sampel air. Kemudian, pengambilan sampel ikan mengikuti pergerakan ikan. Pengawetan pencernaan ikan menggunakan alkohol 70%. Hasil penelitian menunjukkan ikan nila mempunyai panjang usus 3–7 kali lebih panjang dari tubuhnya dan dikategorikan sebagai ikan herbivora. Komposisi jenis makanan yang ditemukan yaitu Euglenophyta, Chlorophyta, Cyanophyta, dan Bacillariophyta. Euglenophyta menjadi makanan utama dengan persentase Indeks Bagian Terbesar 75%. Kemudian, hasil perhitungan luas relung berkisar antara 4,1982—4,8267 menyatakan bahwa ikan nila mampu memanfaatkan sumber daya yang tersedia secara umum. Berdasarkan hasil pengamatan parameter lingkungan, Waduk Ria Rio masih dapat mendukung kehidupan ikan nila. Informasi ini diharapkan dapat menjadi acuan dalam pengelolaan ikan nila (Oreochromis niloticus) di Waduk Ria Rio.

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Ria Rio Reservoir, located in East Jakarta, is a reservoir that is used by the community for fishing. Continuous fishing activities can lead to a decrease in fish density in the reservoir. One of the fish species that is often caught by fishermen is the Nile tilapia (Oreochromis niloticus), which can live in a wide range of environmental conditions and adapt to available food sources. The purpose of this study is to determine the food habits of Nile tilapia in Ria Rio Reservoir, which can be used as a reference for the management of Nile tilapia in the reservoir. The study includes measuring the length and weight of the fish and the digestive tract and also the food composition. The study uses purposive sampling for water sampling, and the fish sampling follows the movement of the fish. The fish's digestion is preserved using 70% alcohol. The results show that Nile tilapia has a digestive tract length of 3–7 times longer than its body and is categorized as an herbivorous fish. The food composition found includes Euglenophyta, Chlorophyta, Cyanophyta, and Bacillariophyta, with Euglenophyta being the main food source with a percentage of 75%. The calculated area of the niche ranges from 4.1982—4.8267, indicating that Nile tilapia can utilize available resources in general. Based on the observation of environmental parameters, Ria Rio Reservoir can still support the life of Nile tilapia. This information is expected to be a reference for the management of Nile tilapia in Ria Rio Reservoir."

"ABSTRAKZat warna dispersi merupakan zat warna khusus yang digunakan untuk mewarnai kain poliester. Pada penelitian ini, dilakukan studi terhadap proses adsorpsi zat warna Disperse Blue 56 pada kain poliester dengan metode tanpa carrier (100) dan dengan penambahan carrier (90). Carrier yang digunakan merupakan senyawa aktif dari Ekstrak Daun Alang-alang (EDA). Banyaknya zat warna yang teradsorp pada kain diketahui dengan mengukur nilai absorbansi awal dan sisa menggunakan Spektrofotometer UV-Vis. Dilakukan uji variasi beberapa variabel pada sistem, yaitu konsentrasi surfaktan, konsentrasi carrier, waktu kontak, pH, dan suhu untuk menentukan kondisi optimum. Kondisi optimum adsorpsi Disperse Blue 56 tanpa carrier dicapai pada konsentrasi surfaktan 75 ppm, waktu kontak 50 menit, pH 5, dan suhu 100, sementara kondisi optimum adsorpsi Disperse Blue 56 dengan carrier EDA dicapai pada konsentrasi surfaktan 55 ppm, konsentrasi ekstrak 17,5 ppm, waktu kontak 70 menit, pH 4, dan suhu 90. Selain itu dibandingkan pula dengan carrier vanilin yang memiliki nilai optimum pada konsentrasi surfaktan 75 ppm, konsentrasi carrier 70 ppm, waktu kontak 50 menit, pH 4, dan suhu 90. Proses adsorpsi Disperse Blue 56 tanpa carrier mengikuti model isoterm adsorpsi Langmuir dengan nilai Qm sebesar 9,1525 mg g-1dan pemodelan kinetika adsorpsi orde dua semu dengan nilai konstanta laju (k2) sebesar 0,0221 g mg-1 menit-1. Proses adsorpsi Disperse Blue 56 dengan carrier vanilin mengikuti model isoterm adsorpsi Freundlich dengan nilai Kf sebesar 48,6071 mg/g, sedangkan penggunaan carrier EDA tidak mengikuti model isoterm Langmuir maupun Freundlich. Pemodelan kinetika adsorpsi dari penggunaan carrier EDA maupun vanilin mengikuti orde dua semu dengan konstanta laju (k2) sebesar 0,0081 g mg-1 menit-1dan 0,0028 g mg-1 men

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ABSTRAKDisperse Dye is a special dye which used to coloring polyester fabric. In this study, carried out a study of the adsorption process Disperse Dye Blue 56 on the polyester fabrics with a method without carrier (100℃) and with the addition of the carrier (90℃). Carrier which used is the active compounds from the Cogongrass leave extract (EDA). The amount of dye on fabrics determined by measuring the absorbance value of the initial and residual use UV-Vis Spectrophotometer. Tested the variation of some variables in the system, namely the surfactant concentration, carrier concentration, contact time, pH, and temperature to determine the optimum conditions. The optimum condition of adsorption of Disperse Blue 56 with no carrier is achieved at a concentration of 75 ppm surfactant, a contact time of 50 minutes, pH 5, and a temperature of 100℃, while the optimum adsorption conditions Disperse Blue 56 with carrier EDA achieved on the surfactant concentration 55 ppm, the concentration of the extract 17.5 ppm, contact time of 70 minutes, pH 4, and a temperature of 90 ℃. Moreover compared well with vanillin carrier that has optimum value at a concentration of surfactant 75 ppm, 70 ppm carrier concentration, contact time of 50 minutes, pH 4, and a temperature of 90 ℃. The adsorption of Disperse Blue 56 without carrier follows the Langmuir adsorption isotherm models with Qm value of 9.1525 mg g-1 and the adsorption kinetics modeling of pseudo second-order rate constant value (k2) of 0.0221 mg g-1 min-1. The adsorption process Disperse Blue 56 with carrier vanillin following the model of Freundlich adsorption isotherms with Kf value of 48.6071 mg / g, while the use of EDA carrier did not follow the Langmuir and Freundlich isotherm models. Modelling of the adsorption kinetics of vanillin and EDA following the pseudo second-order rate constant (k2) of 0.0081 mg g-1 min-1 and 0.0028 g mg-1 min-1."

"Hiu biru merupakan hewan yang berstatus hampir terancam (near threatened) menurut IUCN. Hiu biru sering dijadikan tangkapan sampingan dan diperdagangkan secara global. Hampir seluruh tubuhnya dapat dijual, salah satunya daging dalam bentuk utuh atau olahan. Konsumsi daging hiu biru dalam jangka panjang dapat berbahaya bagi kesehatan. Produk olahan filet ikan tanpa label terdeteksi mengandung spesies hiu biru. Identifikasi produk olahan filet tersebut dilakukan dengan metode molekular dengan penanda inti ataupun mitokondria. Identifikasi dengan metode molekular dapat digunakan juga untuk kegiatan konservasi seperti deteksi populasi suatu organisme. Penelitian ini bertujuan untuk deteksi asal-usul keberadaan populasi hiu menggunakan penanda sitokrom b dan daerah kontrol dari daging filet yang diproduksi toko ritel. 112 sampel diambil secara acak dari toko ritel Jabodetabek kemudian metode yang dilakukan yaitu proses PCR dengan penanda daerah kontrol (CR) dan sitokrom b (Cyt b), hasil amplifikasi akan divisualisasikan ke dalam jaring haplotipe dan mencocokannya dengan data haplotipe dari GenBank. Berhasil teramplifikasi 26 sampel dengan kedua penanda dan 3 di antaranya merupakan sampel yang mislabeling. Jaring haplotipe berhasil terbentuk dengan 8 haplotipe pada penanda Cyt b dengan 7 situs nukleotida polimorfisme dan 14 haplotipe pada penanda CR dengan 12 situs nukleotida polimorfisme. Dua sampel memiliki sekuen yang mirip dengan sekuen referensi yang berasal dari Samudra Hindia, 10 berasal dari Samudra Pasifik, dan 14 sampel mirip dengan sekuen yang berasal dari Samudra Atlantik.

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The blue shark is an animal that is near threatened according to the IUCN. Blue sharks are often used as bycatch and traded globally. Almost all of his body can be sold, one of which is meat in whole or processed form. Long-term consumption of blue shark meat can be harmful to health. Unlabeled processed fish fillets were detected to contain blue shark species. The identification of the processed filet products was carried out by molecular methods with nucleus or mitochondrial markers. Identification by molecular methods can also be used for conservation activities such as detection of the population of an organism. This study aims to detect the origin of the shark population using cytochrome b markers and control areas of fillet meat produced by retail stores. 112 samples were taken randomly from Jabodetabek retail stores, then the method used was the PCR process with control area markers (CR) and cytochrome b (Cyt b), the amplification results were visualized into a haplotype net and matched with haplotype data from GenBank. 26 samples were successfully amplified with both markers and 3 of them were mislabeling samples. The haplotype net was successfully formed with 8 haplotypes on the Cyt b marker with 7 polymorphism nucleotide sites and 14 haplotypes on the CR marker with 12 polymorphic nucleotide sites. Two of the samples had sequences similar to the reference sequence originating from the Indian Ocean, 10 from the Pacific Ocean, and 14 samples similar to the sequence originating from the Atlantic Ocean."

"Waduk Ria Rio merupakan perairan tawar di Jakarta Timur yang dimanfaatkan masyarakat setempat untuk menangkap ikan. Jenis ikan yang paling sering ditangkap adalah ikan nila (Oreochromis niloticus). Penelitian ini bertujuan untuk mengetahui rasio kelamin, tingkat dan indeks kematangan gonad, fekunditas, dan diameter telur ikan nila di Waduk Ria Rio. Pengambilan sampel dilakukan pada bulan Februari 2023. Metode purposive sampling digunakan di sembilan stasiun untuk pengambilan sampel air, sedangkan pengambilan sampel ikan berdasarkan lokasi ikan sering ditemukan menggunakan jala tebar. Pengukuran panjang dan penimbangan berat ikan dilakukan secara langsung di lapangan. Gonad diawetkan dalam alkohol 70% dan diamati di Laboratorium Ekologi Departemen Biologi FMIPA UI. Hasil penelitian menunjukkan bahwa rasio kelamin jantan dan betina ikan nila tidak seimbang dengan perbandingan 1 : 2,04 yang didominasi oleh betina. Ikan nila betina yang diperoleh sebanyak 49 ekor, sedangkan ikan jantan sebanyak 24 ekor. Tingkat kematangan gonad bervariasi yang menunjukkan ikan nila dapat memijah sepanjang tahun. Ikan nila yang didapatkan sedang memasuki masa pemijahan dilihat dari banyaknya jumlah ikan yang telah matang gonad (TKG III dan IV). Nilai indeks kematangan gonad kurang dari 20% dengan kisaran 0,01—3,78%. Fekunditas ikan nila berkisar 258—1190 butir. Ukuran diameter panjang telur berkisar 0,86—2,75 mm dan diameter lebar telur berkisar 0,64—2,39 mm. Berdasarkan sebaran diameter telur, diketahui ikan nila memiliki pola pemijahan partial spawner.

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Ria Rio Reservoir is a freshwater ecosystem in East Jakarta that is used by local people to catch fish. The most commonly caught fish is nile tilapia (Oreochromis niloticus). The aims of this research were to determine sex ratio, gonad maturity stage, gonadal-somatic index, fecundity, and egg diameter of nile tilapia in Ria Rio Reservoir. Sampling was carried out in February 2023. Purposive sampling method was used in nine stations for water sampling, while fish sampling based on fish location is often found using cast net. Measurement of the length and weighing of fish is carried out in the field. The gonads were preserved in 70% alcohol and observed in the Ecology Laboratory of Departement of Biology FMIPA UI. The results showed that sex ratio of male and female was unbalanced with a ratio of 1 : 2,04 and was dominated by females. The female caught were 49 fish, while the male were 24 fish. Gonad maturity stage was varies, indicating that nile tilapia can spawn throughout the year. The nile tilapia obtained was entering the spawning period seen from the large number of fish that have matured (stage III and IV). Gonadal-somatic index was less than 20% with a ranged of 0,01—3,78%. Fecundity of fish ranged from 258—1190 eggs. Egg length diameter ranged from 0,86—2,75 mm and egg width diameter ranged from 0,64—2,39 mm. Based on distribution of egg diameter, nile tilapia is a partial spawner."

"resulth of growth the barramundi cod (Cromilepstes altivelis) ,flowery cod (Epinephelus juscoguttatus) and estuary grouper (E., Tauvina) at the best in float net cages conducted at December month 2004 until June 2005 in the coastal waters Telok Kodek Malaka village,west Lombok...."

"The research conducted to see the influence of the sperm preserve to confront with fertilization of degree and hatch capacity of jambal siam fish. The research conducted in BBI Rambah Village from June until August 2002...."