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Cloning and Expression Analysis of a Giant Gourami Vasa-Like cDNA ALIMUDDIN, .; ANDRIYANI, IRMA; JUNIOR, MUHAMMAD ZAIRIN; ARFAH, HARTON; OCTAVERA, ANNA; CARMAN, ODANG; YOSHIZAKI, GORO
HAYATI Journal of Biosciences Vol 18, No 3 (2011): September 2011
Publisher : Bogor Agricultural University, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (171.232 KB) | DOI: 10.4308/hjb.18.3.135

Abstract

Molecular marker is useful in the development of testicular cells transplantation for detecting donor-derived germ cells in the recipient gonad. In this study, a giant gourami (Osphronemus goramy) vasa-like gene (GgVLG) was cloned and characterized for use as a molecular marker for germ cells in this species. Nucleotide sequence analysis revealed that GgVLG comprises 2,340 bps with an open reading frame of 1,962 bps encoding 653 amino acids. The deduced amino acid sequence contained 17 arginine-glycine or arginine-glycine-glycine motifs and eight conserved motifs belonging to the DEAD-box protein family. The GgVLG sequence showed high similarity to Drosophila vasa, common carp vasa homolog and tilapia vasa homolog for 66.2, 85.9, and 90.7%, respectively. In adult tissues, the GgVLG transcripts were specifically detected in ovary and testis. In situ hybridization analysis showed that GgVLG mRNA was detected in oocytes of the ovary and spermatogonia of the testis. There was no signal detected in the spermatocytes, spermatids and other gonadal somatic cells. Thus, consensus sequences, specific localization of GgVLG mRNA in the germ cells, amino acid sequence similarity and phylogenic analysis all suggest that GgVLG is the giant gourami vasa-like gene. Further, GgVLG can be used as a molecular marker for giant gourami germ cells.
Phenotype characterization of interspecific hybrid abalone Haliotis asinina and Haliotis squamata seed Soelistyowati, Dinar Tri; Kusumawardhani, Aldilla; Junior, Muhammad Zairin
Jurnal Akuakultur Indonesia Vol 12, No 1 (2013): Jurnal Akuakultur Indonesia
Publisher : ISSA

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ABSTRACT Abalone is one of sea-water aquaculture commodity that having relatively low in growth and survival. Interspesific hybridization between abalone Haliotis asinina and Haliotis squamata is required to produce hybrid seeds having a better phenotype inherited from their parents. Crossbreeding of abalone was done in the reciprocal procedure with a natural spawning technique on mass scale. The hybrid seeds showed higher similarity with female brood (98,69%), while  the larvae from H. squamata × H. asinina were abnormal on trocophore until early veliger phase then dead occurred the next phase. The results showed that hybridization between male H. asinina and female H. squamata had higher fertilization and hatching rate than its reciprocal i.e. 76.01±6.15% and 60.14±4.80%. Keywords: interspesific hybridization, phenotype, Haliotis asinina, Haliotis squamata, abalone  ABSTRAK Abalon merupakan komoditas budidaya laut dengan pertumbuhan yang relatif lambat dan kelangsungan hidupnya rendah. Rekayasa persilangan interspesifik antara abalon Haliotis asinina dan Haliotis squamata diharapkan mampu mengatasi permasalahan benih dan memiliki fenotipe unggul yang diwariskan dari tetuanya. Persilangan abalon dilakukan secara resiprok dengan teknik pemijahan alami skala massal. Hasil penelitian menunjukkan bahwa benih hibrida menunjukkan kemiripan dengan induknya sebesar 98,69%, sedangkan larva hibrida antara jantan H. squamata × H. asinina menunjukkan bentuk abnormal pada fase trokofor hingga veliger awal dan kematian pada fase lanjut. Hibridisasi antara jantan H. asinina dan betina H. squamata memiliki derajat pembuahan dan derajat penetasan yang lebih tinggi dibandingkan resiprokalnya, yaitu berturut-turut 76,01±6,15% dan 60,14±4,80%. Kata kunci: hibridisasi interspesifik, fenotipe, Haliotis asinina, Haliotis squamata, abalon  
Induction of gonadal maturation of eel using PMSG, antidopamine, and estradiol-17β Tomasoa, Aprelia Martina; Sudrajat, Agus Oman; Junior, Muhammad Zairin
Jurnal Akuakultur Indonesia Vol 14, No 2 (2015): Jurnal Akuakultur Indonesia
Publisher : ISSA

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ABSTRACT The study was aimed to induce gonadal maturation of eel Anguilla bicolor bicolor by hormonal treatment using pregnant mare serum gonadotropin (PMSG), antidopamine (AD), dan estradiol-17β (E2). The research used complete randomized design with five hormone combination treatments consisted of PK (NaCl 0.95%) as control, P10A (PMSG 10 IU + AD 10 ppm), P20A (PMSG 20 IU + AD 10 ppm), P10BE (PMSG 10 IU + AD 10 ppm + E2 150 µg), and P20BE (PMSG 20 IU + AD 10 ppm + E2 150 µg), with three individual replications for each treatment. Hormonal induction was applied through intramuscular injection weekly during eight weeks at initial body weight of 200 g. The result showed that P10BE treatment has obtained highest level on E2 (0.43 ng/mL), FSH (2.68 mIU/mL) has increased in week-4 and level on T (1.2 ng/mL), LH (2.80 mIU/mL) has increased in week-8. P10BE has affected spermatogenesis and the increased of GSI (2.46%) in fourth and sixth week compared to PK (1.28%), P10A (1.58%), P20A (1.34%), and P20BE (2.12%). In conclusion, combination of PMSG, AD, and E2 hormones could stimulate the gonadal maturation of eel at the size of 200 g into male. Keywords: Anguilla bicolor bicolor, gonadal growth, hormone, maturation  ABSTRAK Penelitian ini dilakukan untuk menginduksi pematangan gonad ikan sidat Anguilla bicolor bicolor secara hormonal dengan menggunakan pregnant mare serum gonadothropin (PMSG), antidopamin (AD), dan estradiol-17β (E2). Metode penelitian ini menggunakan metode eksperimen rancangan acak lengkap dengan lima perlakuan kombinasi hormon, yaitu PK (larutan NaCl 0,95%) sebagai kontrol, P10A (PMSG 10 IU + AD 10 ppm), P20A (PMSG 20 IU + AD 10 ppm), P10BE (PMSG 10 IU + AD 10 ppm + E2 150 µg), dan P20BE (PMSG 10 IU+AD 10 ppm+E2 150 µg), dengan tiga ulangan individu pada masing-masing perlakuan. Induksi hormonal dilakukan dengan metode penyutikan secara intramuskuler setiap minggu selama delapan minggu dengan bobot ikan yang berukuran 200 g. Hasil penelitian menunjukkan bahwa analisis hormon pada perlakuan P10BE memberikan nilai tertinggi masing-masing; kadar E2 (0,43 ng/mL), kadar FSH (2,68 mIU/mL) meningkat di minggu keempat dan kadar T (1,2 ng/mL), kadar LH (2,80 mIU/mL) mengalami peningkatan pada minggu kedelapan. P10BE memberikan efek pada spermatogenesis dan peningkatan nilai GSI (2,46%) pada minggu keempat sampai keenam selama penyuntikkan dibandingkan dengan PK (1,28%), P10A (1,58%), P20A (1,34%) dan P20BE (2,12%). Dengan demikian, kombinasi hormon PMSG, AD, dan E2 dapat merangsang perkembangan dan mempercepat pematangan gonad ikan sidat ukuran 200 g menjadi jantan. Kata kunci: Anguilla bicolor bicolor, pertumbuhan gonad, hormon, maturasi
The gonad growth of Anguilla bicolor bicolor induced by hormone combination of HCG, MT, E2, and antidopamine Zahri, Abdul; Sudrajat, Agus Oman; Junior, Muhammad Zairin
Jurnal Akuakultur Indonesia Vol 14, No 1 (2015): Jurnal Akuakultur Indonesia
Publisher : ISSA

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ABSTRACT The aim of the study was to stimulate eel gonad growth by intramuscularly injection with a hormonal combination of human chorionic gonadotropin (hCG), methyltestosterone (T), estradiol (E2) and antidopamine (A) meanwhile 0.9% NaCl solution was used as control. Estradiol concentration in the blood serum were measured by enzyme-linked immunosorbent assay (ELISA). Stimulation with hCG 20 IU/kg in combination with MT 3 mg/kg and 10 μg/kg antidopamine (hTA treatment) very effective for increased the growth of gonads with indicators gonadosomatic index (GSI) of 4.80%, hepatosomatic index 1.01% and concentration of E2 2.49±0.67 ng/mL were significantly different (P<0.05) than others treatment after ten weeks of application. Key words: hormone, gonad growth, maturation, Indonesian short finned eel  ABSTRAK Penelitian ini bertujuan untuk mengetahui pertumbuhan gonad yang distimulasi oleh kombinasi human chorionic gonadotropin (hCG), metiltestosteron (MT), estradiol (E2) dan antidopamin (A). Ikan sidat disuntik dengan hormon dan 0,9% NaCl sebagai kontrol secara intramuskular. Pengukuran konsentrasi hormon E2 dalam serum darah dengan enzyme-linked immunosorbent assay (ELISA). Stimulasi dengan hCG 20 IU/kg dikombinasi dengan MT 3 mg/kg dan antidopamin 10 μg/kg (perlakuan hTA) sangat efektif untuk feminisasi dan meningkatkan pertumbuhan gonad dengan indikator indeks gonadosomatik (GSI) 4,80%, indeks hepatosomatik 1,01% dan konsentrasi E2 2,49±0,67 ng/mL, secara signifikan berbeda pada taraf P<0,05 dibandingkan perlakuan lain setelah sepuluh minggu aplikasi. Kata kunci: hormon, pertumbuhan gonad, maturasi, sidat
Sex reversal of red tilapia using 17α-methyltestosterone-enriched feed and increased temperature Ayuningtyas, Safira Qisthina; Junior, Muhammad Zairin; Soelistyowati, Dinar Tri
Jurnal Akuakultur Indonesia Vol 14, No 2 (2015): Jurnal Akuakultur Indonesia
Publisher : ISSA

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ABSTRACT The growth rate between male and female red tilapia Oreochromis sp. is different. Generally, the male red tilapia grows faster than the female. Furthermore, the maturation process of red tilapia is relatively fast which causes slower growth rate. One of solutions to this problem is by rearing all male population or mono-sex culture. The method used in this study was commercial feed enrichment with 17α-methyltestosterone at different dosages and water temperature manipulation. The purpose of this research was to examine the effects of commercial feed enrichment with different dosages of 17α-methyltestosterone and water temperature manipulation on success rate of sex reversal of red tilapia into all male population. This research consisted of different temperature treatments (with and without water heating) and 17α- methyltestosterone dosages (0, 10, 20 mg/kg of commercial feed). The best dosage of 17α-methyltestosterone was 20 mg/kg of commercial feed with male to female sex ratio of 86.31%, daily growth rate of 8.18%, and feed conversion ratio of 1.53. In this study, the best treatment to produce the male seeds was the 17α-methyltestosterone treatment. Keywords: 17α-methyltestosterone, sex reversal, red tilapia, temperature  ABSTRAK Ikan nila merah Oreochromis sp. memiliki laju pertumbuhan yang berbeda antara ikan jantan dan betina. Umumnya ikan nila merah jantan lebih cepat tumbuh dibandingkan betinanya. Selain itu, ikan nila memiliki sifat cepat matang gonad dan mudah memijah sehingga akan menghambat pertumbuhan ikan. Salah satu cara untuk mengurangi masalah yang terjadi yakni dengan memelihara populasi ikan nila merah tunggal kelamin atau monoseks jantan. Metode yang dilakukan adalah pemberian hormon 17α-metiltestosteron dengan dosis berbeda melalui pakan buatan dan peningkatan suhu air. Penelitian ini bertujuan untuk mengetahui pengaruh dosis hormon 17α-metiltestosteron melalui pakan buatan dan peningkatan suhu air terhadap keberhasilan alih kelamin jantan pada ikan nila merah. Penelitian ini terdiri atas perlakuan suhu (dengan dan tanpa pemanasan air) dan dosis 17α-metiltestosteron (0, 10, 20 mg/kg pakan). Dosis hormon 17α-metiltestosteron terbaik yang didapatkan adalah 20 mg/kg pakan dengan nisbah kelamin jantan 86,31%, laju pertumbuhan harian 8,18%, dan rasio konversi pakan 1,53. Pada penelitian ini perlakuan terbaik untuk menghasilkan benih jantan adalah perlakuan dosis 17α-metiltestosteron. Kata kunci: 17α-metiltestosteron, alih kelamin, ikan nila merah, suhu
Effect of human chorionic gonadotropin on gonadal development of female striped snakehead Soelistyowati, Dinar Tri; Rakhmawati, Euis; Junior, Muhammad Zairin
Jurnal Akuakultur Indonesia Vol 14, No 2 (2015): Jurnal Akuakultur Indonesia
Publisher : Jurnal Akuakultur Indonesia

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Abstract

ABSTRACT This experiment was carried out to confirmed the role of human chorionic gonadotropin (hCG) injection on the gonadal development of striped snakehead (Channa striata, Bloch) reared in controlled tank. Two groups of female broodstocks were used as control and as treated fish. Fishes were fed with tilapia seed twice daily at satiation. The injection of hCG at the dose of 500 IU/kg body weight was done intramuscular once a week in three weeks of rearing period, whereas physiological solution was injected to control fishes. After one week, fishes injected by 500 IU/kg hCG had more big-size oocytes (0.8–1.2 mm) than control. There was no significant difference (P>0.05) on percentage of gonadal maturity index (GMI), hepatosomatic index (HIS), fecundity, and specific growth rate (SGR) between both treatments. The study showed that the injection of hCG at the dose of 500 IU/kg body weight with three times injection could accelerate the oocytes development of female striped snakehead. Keywords: hCG, gonadal development, striped snakehead fish, Channa striata  ABSTRAK Penelitian ini bertujuan untuk mengetahui pengaruh penyuntikan hormon human chorionic gonadotropin (hCG) terhadap perkembangan gonad ikan gabus (Channa striata, Bloch) yang dipelihara dalam wadah terkontrol. Dua kelompok induk betina digunakan dalam penelitian sebagai kontrol dan ikan perlakuan. Induk diberi pakan benih ikan nila secara at satiation dua kali sehari. Penyuntikan hormon HCG dengan dosis 500 IU/kg dilakukan secara intramuskuler seminggu sekali selama tiga minggu pemeliharaan sedangkan penyuntikan larutan fisiologis dilakukan pada ikan kontrol. Mulai minggu kedua, ikan yang disuntik hormon HCG dengan dosis 500 IU memiliki jumlah oosit berukuran besar (0,8–1,2 mm) yang lebih banyak dibanding ikan kontrol. Nilai indeks kematangan gonad (IKG), indeks hepatosomatik (HIS), fekunditas, dan laju pertumbuhan spesifik (LPH) antara ikan kontrol dan perlakuan hCG menunjukkan nilai yang tidak berbeda nyata (P>0,05). Berdasarkan hasil penelitian, penyuntikan hormon hCG dengan dosis 500 IU/kg dengan frekuensi penyuntikan tiga kali dapat mempercepat perkembangan oosit ikan gabus betina. Kata kunci: hCG, perkembangan gonad, ikan gabus, Channa striata
Performance of broodstock and hybrid juvenile of Egyptian and sangkuriang Clarias gariepinus strains Zulfania, Putri; Junior, Muhammad Zairin; Alimuddin, ,; Sunarma, Ade
Jurnal Akuakultur Indonesia Vol 14, No 2 (2015): Jurnal Akuakultur Indonesia
Publisher : ISSA

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ABSTRACT This study was conducted to evaluate reproduction of broodstock and intraspecific hybrid juvenile performance of Egyptian (M) and sangkuriang (S) strain African catfish Clarias gariepinus at nursery phase. Intraspecific hybridization of African catfish was carried out reciprocally (SM and MS) and purebreed (SS and MM), each was with three replicates. Fish spawning was conducted by artificial fertilization, and larvae were reared at 1st, 2nd and 3rd nursery phases, subsequently. The results showed that broodstock performance (male and female) of both strains were not significantly different (P>0.05) on all reproduction traits, except female’s gonadosomatic index. Fertilization and hatching rates of all hybrids were not significantly different (P>0.05). MM juvenile had higher growth performances than other juvenile hybrids. Heterosis of total length, standard length, and body weight were varied, whereas the survival showed positive heterosis. SM juvenile showed positive growth heterosis in 3rd nursery phase (total length, standard length, and body weight were 2.61%; 2.16%, and 4.79% respectively). Survival heterosis of MS juvenile (24.20% for total length; 103.13% for standard length and 11.62% body weight) was higher than SM juvenile (6.86%; 48.57%, and 3.09%) on all nursery phases Keywords: African catfish, intraspecific hybridization, growth, survival, heterosis  ABSTRAK Penelitian ini dilakukan untuk menguji performa reproduksi induk dan benih hasil hibridisasi intraspesifik ikan lele Afrika Clarias gariepinus strain Sangkuriang (S) dan Mesir (M) pada fase pendederan. Hibridisasi intraspesifik ikan lele Afrika dilakukan secara resiprokal (SM dan MS) dan galur murni (SS dan MM) masing-masing dengan tiga ulangan. Pemijahan dilakukan secara buatan dan larva yang dihasilkan dipelihara pada fase pendederan pertama, kedua, dan ketiga. Hasil penelitian menunjukkan bahwa performa induk ikan lele jantan dan betina pada kedua strain tidak berbeda nyata (P>0,05) pada seluruh parameter reproduksi, kecuali indeks gonadosomatik (GSI) pada induk betina. Derajat pembuahan dan penetasan telur pada seluruh persilangan tidak berbeda nyata (P>0,05). Pertumbuhan benih persilangan MM lebih tinggi, dibandingkan benih hasil persilangan lain. Nilai heterosis panjang total, panjang standar, dan bobot tubuh yang dihasilkan pada setiap stadia pendederan bervariasi, sedangkan nilai heterosis kelangsungan hidup menunjukkan hasil seluruhnya positif dibandingkan rataan galur murni. Heterosis pertumbuhan benih persilangan SM pada pendederan ketiga menunjukkan hasil yang positif (2,61% untuk panjang total; 2,16% untuk panjang standar dan 4,79% untuk bobot tubuh). Nilai heterosis kelangsungan hidup benih persilangan MS (24,20% untuk panjang total; 103,13% untuk panjang standar dan 11,62% untuk bobot tubuh) lebih tinggi dibandingkan benih persilangan SM (6,86%, 48,57% dan 3,09%) pada setiap stadia pendederan. Kata kunci: ikan lele Afrika, hibridisasi intraspesifik, pertumbuhan, kelangsungan hidup, heterosis 
Synodontis eupterus Larvae Masculinization Using Javanese Long Pepper Extract (Piper retrofractum) Wijaya, Prassetyo Dwi Dhany; Junior, Muhammad Zairin; Soelistyowati, Dinar Tri; Widanarni, Widanarni
Journal Omni-Akuatika Vol 13, No 1 (2017): Omni-Akuatika May
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (436.451 KB) | DOI: 10.20884/1.oa.2017.13.1.224

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Synodontis eupterus male represents only 5-10 % of farmer total synodontis production, which limits male availability for reproduction purpose. A method widely used in overcoming the low male production was masculinization through synthetic hormones, which was restricted due to its adverse impact on the environment. Natural ingredients from plant were demonstrated in various studies to substitute the 17α-methyltestosteron hormone on masculinization. This research aimed at evaluating the effects of Javanese long pepper extract (JLP) through immersion on synodontis fish larvae. The research was conducted using factorial design with two faktor (4x2) consisted of eight treatments: 17α-methyltestosteron 2 mg L-1 (MT) immersion for 5 and 10 hours, JLP dose 0.125 mg L-1 (P1) immersion for 5 and 10 hours and dose 0.25 mg L-1 (P2) immersion for 5 and 10 hours compared to the control treatment without immersion (P0). A hundred of synodontis larvae of 10 days old after hatching each replication were used in the immersion treatments. The results showed that JLP treatments produced 25-40 % of male synodontis age four months, 1-2 % females and above 60 % intersex. While at age five months, the percentage of intersex fish decreased to 20-40 %, the female fish increased to  60-62 %, and male fish ranged 20-35 % in JLP compared to the control P0 (15 %). The dose of JLP 0.25 mg L-1 increased mortality of about 14-54 %.
Stress responses of transportation on red tilapia which given feed containing chromium Rakhmawati, Rakhmawati,; Suprayudi, Muhammad Agus; Setiawati, Mia; Widanarni, Widanarni,; Junior, Muhammad Zairin; Jusadi, Dedi
Jurnal Akuakultur Indonesia Vol 17, No 1 (2018): Jurnal Akuakultur Indonesia
Publisher : ISSA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19027/jai.17.1.16-25

Abstract

ABSTRACTThis study was conducted to evaluate stress responses of transportation on red tilapia Oreochromis sp. which given feed containing chromium. Three isonitrogenous and isocaloric experimental feeds were prepared, these diets were control (without chromium), CrPic 1 mg/kg, and CrYst 2 mg/kg supplementation in feed, all group were arranged triplicate. Satiation feeding was done three times a day. After a 60-day feeding experiment, the experimental fishes were fasted and distributed in polyethylene bags (N=60 fish/bag) containing 3 L of water, subjected to condition of transport simulation for 13 hours. Survival rate, levels of plasma cortisol, blood glucose, superoxide dismutase (SOD), and malondialdehyde (MDA) enzyme were observed at before transportation, after transportation, one day, and two days after transportation. The result showed that chromium supplementation reduced the levels of plasma cortisol before and after transportation, one day, and two days after transportation. Also, it decreased blood glucose compared with control significantly before transportation and one day after transportation. The SOD enzyme concentration increased significantly after fish was fed with feed containing chromium for 30 days, while the MDA enzyme concentration increased significantly after two days of transportation. However, there was no significant difference in the survival of red tilapia between treatments. The best result was obtained in the treatment of fish which fed with feed containing chromium. CrPic supplementation 1 mg/kg and CrYst 2 mg/kg increased the body resistance in red tilapia by decreasing the negative effect of stress while transportation. Keywords: stress, transportation, red tilapia, chromium  ABSTRAKPenelitian dilakukan untuk mengevaluasi respons stres transportasi ikan nila merah Oreochromis sp. yang diberikan pakan yang mengandung kromium. Pada penelitian ini digunakan tiga jenis pakan, terdiri atas pakan tanpa suplementasi kromium (kontrol), pakan bersuplementasi kromium pikolinat (CrPic 1 mg/kg), dan kromium yeast (CrYst 2 mg/kg), semua perlakuan diulang sebanyak tiga ulangan. Pemberian pakan sebanyak tiga kali sehari dan dilakukan secara at satiation. Setelah 30 hari pemeliharaan, ikan uji dipuasakan dan didistribusikan dalam plastik polietilen (N=60 ekor ikan/kantong plastik) yang berisi 3 L air, dilakukan dengan simulasi transportasi selama 13 jam. Parameter yang diamati pada penelitian ini adalah kelangsungan hidup, kortisol, glukosa darah, enzim superoksida dismustase (SOD), dan malondialdehida (MDA) saat sebelum transportasi, sesaat setelah transportasi, sehari, dan dua hari setelah transportasi. Hasil yang didapatkan adalah suplementasi kromium menurunkan konsentrasi kortisol secara signifikan sebelum transportasi, sesaat, sehari, dan dua hari setelah transportasi. Suplementasi kromium menurunkan glukosa darah secara signifikan pada saat sebelum transportasi dan sehari setelah transportasi. Konsentrasi enzim SOD meningkat secara signifikan setelah pemberian pakan bersuplementasi kromium selama 30 hari, sedangkan konsentrasi enzim MDA meningkat secara signifikan setelah dua hari transportasi pada ikan yang diberi pakan bersuplementasi kromium. Namun, tidak ada perbedaan yang signifikan pada kelangsungan hidup ikan nila merah antarperlakuan. Hasil terbaik diperoleh pada perlakuan ikan dengan suplementasi kromium. Suplementasi 1 mg/kg CrPic dan 2 mg/kg CrYst dapat meningkatkan daya tahan tubuh pada budidaya ikan nila merah dengan menurunkan pengaruh negatif stres akibat transportasi. Kata kunci: stres, transportasi, nila merah, kromium
Growth Performance of Nile tilapia Immersed in 17α-methyltestosterone and rElGH, and Fed a Diet Enriched with rElGH Safir, Muhammad; Alimuddin, Alimuddin; Setiawati, Mia; Junior, Muhammad Zairin; Suprayudi, Muhammad Agus
Journal Omni-Akuatika Vol 13, No 2 (2017): Omni-Akuatika November
Publisher : Fisheries and Marine Science Faculty - Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (196.458 KB) | DOI: 10.20884/1.oa.2017.13.2.288

Abstract

The aim of the present study was to investigate the growth performance of Nile tilapia immersed in 17α-methyltestosterone (MT) and recombinant giant grouper growth hormone (rElGH), and fed a rElGH-enriched diet. A total of 200 tilapia larvae aged 10 days and 14 days post hatching was immersed in 1 liter of 30 g/L saline water for 3 minutes, then in freshwater containing either MT, MT+rElGH, or rElGH for 4 hours. The MT dose was 2.0 mg/L and rElGH was 2.5 mg/L. As control was treatment without MT and rElGH. Fish were maintained in 250-L aquariums for 6 weeks and then moved to net cages for 8 weeks of rearing. The rElGH-enriched diet was fed to the 6-week-old fish for a month, and then fed a non-enriched diet. Each treatment was triplicates. The result showed that the daily growth rate (DGR), biomass gain (BM), survival (SR) and feed (artemia nauplii) consumption during maintenance in the aquariums in the rElGH and MT+rElGH treatments were higher (P<0.05) than in the control. The higher DGR and BM at net cage rearing and lower feed conversion ratio (P<0.05) were also found in MT and MT+rElGH treatments. None of the treatments showed any difference in survival (P>0.05). Profits estimation in the MT and MT+rElGH treatments were 63.38% and 57.91% higher than the control. The present study concluded that higher Nile tilapia farming performance could be obtanied by MT immersion in the larval phase and feeding juvenile on the rElGH-enriched diet.