Judul: Induction of Gonadal Maturation of Eel Anguilla bicolor bicolor with Oodev and Estradiol-17β through Meal
Abstrak: Ikan sidat (Anguilla sp.) betina matang gonad berukuran >500 g memerlukan waktu pemeliharaan yang panjang sehingga diperlukan metode untuk mempercepat pematangan gonad. Salah satu upaya tersebut yaitu melalui manipulasi reproduksi secara hormonal. Penelitian ini bertujuan mempercepat pematangan gonad sidat menggunakan hormon Estradiol-17β dan Oodev. Sidat berukuran 250-290 g diinduksi dengan hormon Oodev dan Estradiol-17β metode oral melalui pakan yang disuplementasi dengan tepung kunyit 5 g/kg pakan. Penelitian menggunakan rancangan acak lengkap (RAL) tiga perlakuan dan satu kontrol. Padat tebar sebanyak 10 ekor/perlakuan. Dosis hormon perlakuan dicampur dalam pakan terdiri dari kontrol (0 mL/kg ikan hormon), hO2 (1 mL/kg ikan Oodev (PMSG + AD), hO1E3 (1 mL/kg ikan (Oodev (PMSG + AD) + 3 mg E2), dan hO1E6 (1 mL/kg ikan (Oodev (PMSG + AD) + 6 mg E2). Hasil menunjukkan bahwa perlakuan hO1E6 memberikan nilai terbaik untuk LPS (4,004±0,96%/hari), AG (126,456±29,098 cm), IGS (1.30±0,51%), persentasi betina 80%, nilai hematokrit (39,57±3,36%) dan eritrosit ((1,83±0,21)x106 sel/mm3 ) (P<0,05), sedangkan untuk parameter PPM, IHS, diameter mata, faktor kondisi, DTSI tidak berbeda nyata (P>0,05). Pemberian kombinasi hormon 1 mL/kg ikan Oodev dan 6 mL/kg ikan Estradiol-17β dapat mempercepat pertumbuhan bobot, pematangan gonad, dan feminisasi sidat. Kombinasi hormon tersebut dapat menjadi alternatif untuk mempercepat pertumbuhan bobot dan pematangan gonad pada kegiatan budidaya pembesaran dan pembenihan sidat., Eel (Anguilla sp.) mature female gonads measuring >500 g require a long maintenance time so a method is needed to accelerate gonadal maturation. One of these efforts is through hormonal manipulation of reproduction. This study aims to accelerate the gonadal maturation of eels using the hormones Estradiol-17β and Oodev. Eels measuring 250-290 g were induced with the hormone Oodev and Estradiol-17β orally through feed supplemented with turmeric flour 5 g/kg feed. The experimental design used was a completely randomized design (CRD) with three treatments and a control with 10 animals/treatment. The dose of treatment hormone mixed in the feed consisted of control (0 mL/kg fish hormone), hO2 (1 mL/kg Oodev fish (PMSG + AD), hO1E3 (1 mL/kg fish (Oodev (PMSG + AD) + 3 mg E2 ), and hO1E6 (1 mL/kg fish (Oodev (PMSG + AD) + 6 mg E2). The results showed that hO1E6 treatment gave the best value for SGR (4.004±0.96%/day), AG (126.456±29.098 cm ), GSI (1.30±0.51%), 80% female percentage, hematocrit value (39.57±3.36%) and erythrocytes ((1.83±0.21)x106 cells/mm3 ) (P<0 0.05), while for parameters Lm, IHS, eye diameter, condition factor, DTSI was not significantly different (P>0.05).The administration of a combination of hormones 1 mL/kg Oodev fish and 6 mL/kg Estradiol-17β fish could accelerate weight growth, gonadal maturation, and eel feminization.The combination of these hormones can be an alternative to accelerate weight growth and gonad maturation in eel rearing and hatchery cultivation activities.
Keyword: Anguilla bicolor, Estradiol-17β, gonadal maturation, growth, Oodev

Judul: Effect of Oodev Hormones and Methyltestosterone  in Gonad Maturation of Eel (Anguilla sp.)
Abstrak: Ikan sidat (Anguilla sp.) termasuk ke dalam ikan kategori katadromus yang beruaya dari hulu sungai menuju ke laut untuk memijah serta bertelur. Hingga saat ini budidaya ikan sidat masih menggunakan 100% benih yang berasal dari alam. 17α-metiltestosteron merupakan androgen spesifik pada spesies jantan yang sering digunakan dalam pembalikan kelamin (maskulinisasi). Oodev merupakan hasil dari kombinasi antara Pregnant Mare Serum Gonadotropin (PMSG) dan anti dopamin. Rancangan penelitian ini berupa rancangan acak lengkap yang terdiri atas empat perlakuan dengan tiga ulangan. Perlakuan terdiri dari 2 mL Oodev, 1 mL Oodev + 3 mg 17α-metiltestosteron, 1 mL Oodev + 6 mg 17α-metiltestosteron dan perlakuan kontrol. Ikan sidat yang digunakan berukuran bobot rata-rata 239±24,10 g yang berasal dari pembudidaya di daerah Situbondo, Jawa Timur. Wadah pemeliharaan ikan sidat adalah bak beton yang berukuran 2 m x 2 m x 0,7 m (2,8 m3 ) selama 60 hari pemeliharaan. Pakan yang diberikan berupa pakan tepung yang telah ditambahkan hormon dan pemberian dilakukan secara restricted sebanyak 3% dari biomassa dengan frekuensi pemberian pakan dua kali sehari. Hasil penelitian berupa penambahan Oodev dan 17α-metiltestosteron berpengaruh nyata terhadap indeks gonadosomatik dengan hasil terbaik pada perlakuan OMT6 dengan 0,32 %., Eel (Anguilla sp.) belongs to the catadromous category of fish that migrates from the upstream of the river to the sea to spawn and lay eggs. Until now, the cultivation of eel still uses 100% of seeds that come from nature. 17α methyltestosterone is a male species-specific androgen that is often used in sex reversal (masculinization). Oodev is the result of a combination of Pregnant Mare Serum Gonadotropin (PMSG) and anti-dopamine. The research design was completely randomized, consisting of four treatments with three replications. The treatment consisted of 2 mL Oodev, 2 mL Oodev + 3 mg 17α-methyltestosterone, 2 mL Oodev + 6 mg 17α-methyltestosterone, and control treatment. The eel used has an average weight of 239±24.10 g from farmers in the Situbondo area, East Java. The eel-rearing container is a concrete tank measuring 2 m x 2 m x 0.7 m (2.8 m3 ) for 60 days of rearing. The feed given was in the form of flour that had been added with hormone and was given in a restricted manner as much as 3% of the biomass with the frequency of feeding twice a day. The results of the study in the form of the addition of Oodev and 17α-methyltestosterone had a significant effect on the gonadosomatic index with the best results in the OMT6 treatment with 0.32%.
Keyword: Anguilla sp., gonadosomatic, gonadal maturation, Methyltestosterone, Oodev

Judul: Analisis keamanan konstruksi fungsi hash berbasis sandi blok kunci simetrik (Kajian Teoritik)
Abstrak: Hash function is used to secure the integrity and authenticity of a massege, so that the message is save. The message which will be secured, will be attached to hash/message digest/digital signature value fro, the message. A secure hash function is the one which has pre-image resistance, 2nd pre-image resistance and collision resistance. Hash function has been classified into hash keyed function (Message Authentication Codes/MAC) and unkeyed (Modification Detection Codes/MDC)
Keyword: