M. Syaifudin
Program Studi Budidaya Perairan, Fakultas Pertanian, Universitas Sriwijaya

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RELATION BETWEEN BROODSTOCK NUMBER AND SPAWNING FREQUENCY AND EGG PRODUCTION OF HUMPBACK GROUPER (CROMILEPTES ALTIVELIS) Syaifudin, M.; Aliah, R.S.; Muslim, .; Sumantadinata, K.
Jurnal Akuakultur Indonesia Vol. 6 No. 2 (2007): Jurnal Akuakultur Indonesia
Publisher : ISSA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (166.057 KB) | DOI: 10.19027/jai.6.191-196

Abstract

This study was performed to determine spawning frequency, number of ovulated egg and spawning time of humpback grouper (Cromileptes altivelis) broodstock in hatchery.  Broodstock of 20-83 fish in weight of 1.5-2.0 kg were reared in circular concrete tank 225 m3.  The results showed that increasing in number of broodstock increases spawning frequency (R2= 0.694), and ovulated eggs number was also increased (R2= 0.828).  Spawning of humpback grouper can occur in the third to fourth week in every month. Keywords: reproductive biology, spawning, Cromileptes altivelis   ABSTRAK Penelitian ini bertujuan untuk mengetahui frekuensi pemijahan, jumlah telur dan waktu pemijahan populasi induk ikan kerapu tikus (Cromileptes altivelis) di hatchery.  Jumlah induk yang bervariasi antara 20-83 ekor dengan ukuran 1,5-2 kg ditempatkan dalam bak beton bulat, kapasitas 225 m3. Hasil penelitian ini menunjukkan bahwa dengan bertambahnya jumlah induk, maka frekuensi pemijahan yang diperoleh juga semakin meningkat (R2=0,694), dan produksi telur juga semakin meningkat (R2=0,828). Pemijahan kerapu tikus dapat berlangsung setiap bulan, di mana waktu pemijahan terjadi pada kuarter keempat hingga kuarter ketiga. Kata kunci: Biologi reproduksi, Pemijahan, Cromileptes altivelis
PENYELESAIAN PERSAMAAN SCHRÖDINGER POTENSIAL NON-SENTRAL SCARF HIPERBOLIK PLUS ROSEN-MORSE TRIGONOMETRIK MENGGUNAKAN METODE SUPERSIMETRI MEKANIKA KUANTUM Syaifudin, M.; Suparmi, -; Cari, -
Jurnal Spektra Vol 16, No 2 (2015): Spektra: Jurnal Fisika dan Aplikasinya
Publisher : Jurnal Spektra

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Abstract

AbstrakTujuan dari penelitian ini adalah menyelesaikan persamaan Schrödinger potensial non-sentral Scarf hiperbolik plus Rosen-Morse trigonometrik menggunakan metode Supersimetri Mekanika Kuantum (SUSI MK).Spektrum energi dan fingsi radial diperoleh dari penyelesaian persamaan Schrödinger bagian radial, sedangkan fungsi gelombang bagian sudut dan bilangan kuntum orbital diperoleh dari persamaan Schrödinger bagian sudut polar.Spektrum energi dan bilangan kuantum orbital ditentukan dengan sifat shape invariance.Penentuan fungsi gelombang tingkat dasar bagian radial ditentukan dengan sifat lowering operator dan fungsi gelombang tereksitasi ditentukan dengan sifat raising operator.Baik untuk bagian radial maupun bagian polar ditentukan dengan menggunakan sifat lowering operator dan raising operator. AbstractThe purpose of this research is to solve the Schrödinger equation of non-central potential Scarf hyperbolic plus Rosen-Morse trigonometric method Supersymmetry Quantum Mechanics (SUSY QM). Energy spectrum and radial functions derived from the completion of the radial part of the Schrödinger equation, while the wave functions of the corners and orbital quantum numbers obtained from the Schrödinger equation part of the polar angle. Energy spectrum and orbital quantum number is determined by the nature of the shape invariance. Determination of the wave functions of the radial part of the base rate is determined by the nature of lowering operators and the excited wave function is determined by the nature of the raising operator. Both for the radial and polar parts determined by using the properties of lowering and raising operators.Keywords: Schrödinger equation, the non-central potential Scarf hiperbolic plus Rosen-Morse trigonometric, Supersymmetry Quantum Mechanics
KELANGSUNGAN HIDUP DAN PERTUMBUHAN BENIH IKAN LELE (CLARIAS SP.) PADA SALINITAS MEDIA YANG BERBEDA Friska Sitio, Maru Hariati; Jubaedah, Dade; Syaifudin, M.
Jurnal Akuakultur Rawa Indonesia Vol 5, No 1 (2017): JURNAL AKUAKULTUR RAWA INDONESIA
Publisher : Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (165.365 KB) | DOI: 10.36706/jari.v5i1.5810

Abstract

ABSTRACT The research consisted of two phases, pre research and research phase. Pre research was carrried out to quantify the isoosmotic of Juvenile catfish by conductivity both on media and fish body which purpose to make  the curve of the correlation between salinity with conductivity. The research phase was the maintenance of Juvenile Catfish for 20 days to prove isoosmotic value to survival rate, growth and feed conversion. This research used a completely randomized design with 5 treatments and 3 replications. The treatments were media freshwater (control), 2 ppt (P1), 4 ppt (P2), 6 ppt (P3), 8 ppt (P4). The research value showed there was positive correlation between salinity and conductivity. The isoosmotic value for Juvenil Catfish was 5,893 mS/cm or 4,11 ppt salinity. Survival, growth and feed conversion ratio shows the results were not significantly different (P <0,05). Meanwhile, regression equation indicated salinity (X) that optimal for the maintenance of Juvenile Catfish ranging from 2,6 to 5,0 ppt. Keywords : Conductivity, Growth, Isoosmotic, Salinity, Survival rate
FIN TYPE VARIATION OF LIONHEAD STRAIN GOLDFISH (CARASSIUS AURATUS) OFFSPRING Syaifudin, M.; Carman, Odang; Sumantadinata, K.
Jurnal Akuakultur Indonesia Vol. 3 No. 3 (2004): Jurnal Akuakultur Indonesia
Publisher : ISSA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (361.103 KB) | DOI: 10.19027/jai.3.1-4

Abstract

 Lionhead strain goldfish (Carassius auratus) inheritance produce many variations in phenotype qualitative traits of their offspring that is not common with the parents. Lionhead is an ornamental freshwater fish, they do not have a dorsal fin, but it is a beauty finfish, is popular to the people and have a high economic value. Of the 846 offspring of lionhead is produced in this experiment, and 57,7% of them have dorsal fin (42,3% normal), 13,1% of them have anal fin which did not similar with their parents, 58,6% caudal fin of them did not have similar to their parents. It might be caused by incompletely segregation in meiosis and many gen responsible to certain phenotype trait. Another abnormalities such as no anal fin, blindness, stumped and no pigmen in their gill lamella also occurred. Key words: Inheritance, fin, phenotype, abnormality   ABSTRAK Ikan maskoki strain lionhead menghasilkan keturunan dengan fenotip yang sangat bervariasi dan berbeda dengan induknya. Ikan ini merupakan ikan hias air tawar yang tidak memiliki sirip punggung namun tetap memiliki keindahan, sehingga menjadi begitu populer di masyarakat dan memiliki nilai ekonomi yang tinggi. Sebanyak 846 keturunan (anakan) telah dihasilkan dalam percobaan ini, dan sebanyak 57,7% dari populasi tersebut memiliki sirip punggung (berarti 42,3% merupakan keturunan normal), 13,1% memiliki sirip dubur yang tidak mirip dengan induknya. Variasi keturunan ikan maskoki strain lionhead ini disebabkan oleh segregasi yang tidak sempurna dalam proses meiosis dan banyaknya gen yang terlibat dalam pembentukan penotip tertentu. Abnormalitas lainnya juga terjadi pada keturunan ikan maskoki strain lionhead ini, seperti tidak adanya sirip dubur, mata buta, tubuh pendek dan tidak adanya pigmen pada lemela insang Kata kunci: Keturunan, sirip, fenotip, abnormalitas