Articles

Found 31 Documents
Search

Learning with Abductive-Pictorial Strategy for Improving Mathematical Proofing Ability of Prospective Mathematics Teachers Muzaki, Ahmad; KUSUMAH, YAYA S; SABANDAR, JOZUA
International Journal of Science and Applied Science: Conference Series Vol 2, No 1 (2017): International Conference on Science and Applied Science 2017
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/ijsascs.v2i1.16668

Abstract

This study aims to improve the mathematical proofing ability of prospective mathematics teachers in IKIP Mataram using Abductive - Pictorial Strategy (which will be abbreviated as APS). This study used an explanatory sequential design, a combination of quantitative and qualitative methods in sequence. The first stage is done by quantitative method and the second stage with qualitative method. Quantitative method is used to obtain measurable data and qualitative method is used to explore the findings obtained from the quantitative stage. This research considers the Prior Mathematical Knowledge (PMK) factor of prospective teacher. The results showed that the improvement of students' mathematical proofing ability in high, medium, and low PMK categories with APS better than Conventional Learning (CL). The mean improvement of students' mathematical proofing ability in high PMK category which got learning with APS and PK included in medium category. The mean improvement of students' mathematical proofing ability in medium PMK category with APS included in medium category, with CL included in low category. The mean improvement of students' mathematical proofing ability in the low PMK category with APS and CL included in low category.
PHENOTYPIC AND GENOTYPIC PERFORMANCES OF BLACK TIGER SHRIMP, Penaeus monodon HAVING FAST GROWTH TRAITS Haryanti, Haryanti; Muzaki, Ahmad; Wardana, Ida Komang; Fachrudin, Fachrudin; Sembiring, Sari Budi Moria; Permana, I Gusti Ngurah
Indonesian Aquaculture Journal Vol 4, No 2 (2009): (December 2009)
Publisher : Pusat Penelitian dan Pengembangan Perikanan, Badan Penelitian dan Pengembangan Kelautan da

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (143.932 KB) | DOI: 10.15578/iaj.4.2.2009.101-108

Abstract

Shrimp breeding research focusing on fast growth traits is important to develop better phenotypic and genotypic characters of shrimp spawners. The aim of this research was to evaluate shrimp breeding technology to produce fry having fast growth traits. Selection was initiated from the breeding of wild shrimp spawners (F-0) based on full sib mating, probiotics, biosecurity, and viral diseases diagnosis. Viral disease diagnoses were performed using 7 viruses (TSV, WSSV, IHHNV, YHV, BP, MBV, and HPV) provided in the IQ-2000 kit. The result showed that 11 families of the first generation (F-1) shrimp were phenotypically varied (big, regular and small size). Number of fry from the first generation resulted from phenotypic selection that have fast growth trait ranged between 1.99% and 4.49% of the total fry population. Genotypic performance of the shrimp broodstock (F-0) and the first generation (F-1) showed different genetic variations. Heterozigosity values were 0.2872±0.0047 (female) and 0.5487±0.0103 (male) for shrimp broodstock (F-0), 0.704±0.0261 for the first generation (F-1) having fast growth trait, and 0.6224±0.023 for F-1 having slow growth. Gene markers of fast growth trait were indicated by the genes with molecular weights of 1,025; 1,280; and 1,325 basepairs and having different DNA sequences compared to that of slow growth shrimp.
THE EFFECT OF PROBIOTIC ON IMMUNITY IMPROVEMENT IN THE FRY AND SPAWNER PRODUCTION OF PACIFIC WHITE SHRIMP Litopenaeus vannamei Haryanti, Haryanti; Muzaki, Ahmad; Sembiring, Sari Budi Moria; Fahrudin, Fahrudin; Permana, I Gusti Ngurah; Wardana, Ida Komang
Indonesian Aquaculture Journal Vol 9, No 2 (2014): (December 2014)
Publisher : Pusat Penelitian dan Pengembangan Perikanan, Badan Penelitian dan Pengembangan Kelautan da

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (149.536 KB) | DOI: 10.15578/iaj.9.2.2014.133-146

Abstract

In order to improve immune system of Pacific white shrimp L. vannamei from any kinds of diseases, various probiotic agents were tested such as Bacillus sp. BC, Alteromonas sp. BY-9 and mixed of both. The probiotics were cultured and added directly to the larval rearing tank (106 cfu/mL equal to 0.5 liter/m3) up to PL-12. In cultured shrimp spawners, probiotic was mixed with feed coated with chitosan, and without adding probiotic as control. In the present experiment, shrimp fry and spawners were reared in tank capacity of 5 m3 and 8 m3. Immunity response was analyzed by quantitative value of the immunity related gene expression with RTqPCR. The results showed that survival rate of shrimp fry cultured with mixed probiotic was 63.16% (PL-8) and 53.46% (PL-12), while control 13.35% (PL-8) and 12.48% (PL-12) respectively. The number of shrimp hemocytes starting from 420 to 530.5 x 104 cells/mL and after challenged with WSSV (for 72 hrs exposure) between two treatments of Alteromonas sp. BY-9 and Bacillus cereus BC was not significantly different P>0.05 (402.5 and 432.5 x 104 cells/mL), while in mixed probiotic and control treatments were 391.75 and 229.0 x 104 cells/mL, respectively. The analysis of immunity gene expression revealed that the use of probiotic from larval stages up to spawner has been proved in increasing immunity responses quantified from ProPO activating system (prophenoloxidase/proPO) as much as 1.6-2.0 fold, clotting system (transglutaminase, clotting protein) of 1.5-2 fold, Antimicrobial Peptide System (anti-LPS factor, crustin, lysozyme, penaiedin2) of 1.5-2.8 fold, and Antioxidant defense mechanism (superoxidase dismutase/SOD, glutathione peroxidase/GPx) of 1.8-2.0 fold compared to control.
ADDITION OF ADJUVANTS IN RECOMBINANT SUBUNIT VACCINES FOR THE PREVENTION OF GROUPER SLEEPY DISEASE IRIDOVIRUS (GSDIV) INFECTION IN HUMPBACK GROUPER, Cromileptes altivelis Mahardika, Ketut; Mastuti, Indah; Muzaki, Ahmad; Sudewi, Sudewi
Indonesian Aquaculture Journal Vol 11, No 2 (2016): (December, 2016)
Publisher : Pusat Penelitian dan Pengembangan Perikanan, Badan Penelitian dan Pengembangan Kelautan da

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (323.207 KB) | DOI: 10.15578/iaj.11.2.2016.87-95

Abstract

Infection of grouper sleepy disease iridovirus (GSDIV) which is a member of Megalocytivirus causes mass mortalities in marine fish in Indonesia. This study was conducted to know the effectiveness of recombinant subunit vaccine of GSDIV with an addition of adjuvants against GSDIV infection. Inactive bacteria Eschericia coli containing recombinant MCP-GSDIV protein was added with montanide ISA adjuvant at a ratio of 3:7. The vaccine was administered to humpback grouper, Cromileptes altivelis by intramuscular and intraperitoneal injection at a dose of 0.1 mL/fish. Test of the vaccine in humpback grouper was performed in four replicates (four trials). Results of the vaccination showed that the recombinant protein vaccine added with the adjuvant increased immunity of humpback grouper, indicated by higher relative percent survival (RPS= 77.78%) compared to negative control (PBS) and 50% higher compared to protein control (pET Sumo CAT) at two weeks post vaccination. The RPS values of the recombinant protein vaccine were still higher (53.57%-72.73%) than those of the control vaccine and 25%-53.33% of the protein control in the 4th week post vaccination. GSDIV detection by PCR showed that MCP-GSDIV-DNA and pET Sumo CAT-DNA were not detected in the vaccinated fish after one, two, three, and four weeks post vaccination. The fish died in both of vaccinated and control groups after experimental challenge with GSDIV were found to be infected with GSDIV. It can be stated that recombinant subunit vaccine of GSDIV with the addition of montanide ISA adjuvant could be used to prevent and diminish mortalities of grouper against GSDIV infection.
REPRODUCTIVE ASPECTS OF CULTURED HUMPBACK GROUPER (Cromileptes altivelis) FOR SUPPORTING SEED PRODUCTION Sembiring, Sari Budi Moria; Hutapea, John Harianto; Muzaki, Ahmad; Wardana, Ida Komang; Astuti, Ni Wayan Widya; Andamari, Retno
Indonesian Aquaculture Journal Vol 9, No 1 (2014): (June 2014)
Publisher : Pusat Penelitian dan Pengembangan Perikanan, Badan Penelitian dan Pengembangan Kelautan da

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (736.21 KB) | DOI: 10.15578/iaj.9.1.2014.1-8

Abstract

Humpback grouper (Cromileptes altivelis) has been successfully spawned in 2000 by IMRAD (Institute of Mariculture Research and Development) and there are already the third generation (F3) currently. The reproductive aspects need to be studied to support the success of seed production. Humpback grouper reared in floating cage (F1 and F3) had matured (gonad stage 4) while F2 fish reared in concrete tanks has spawned. Gonadal maturity stage of 38 fishes from first generation (F1) and 35 fishes from the third generation were observed in June 2013 and compared to gonadal maturity stage of 18 fishes from the second generation observed in June 2009. Samples were measured in total length and body weight and gonads were taken for histology preparation to determine gonadal maturity stage and the sex. From the histological observation of the gonads, it showed that all female humpback grouper were in early maturity stage (stage I and II) with gonadal maturity index between 0.12% and 5.45%. Further, it was observed that the same gonad was found in different maturity stage and concluded that humpback groupers were multiple spawners (asynchronous). By determining gonadal maturity level, it was also known the minimum size for grouper ready to spawn.
PERFORMA BENIH TIRAM MUTIARA (Pinctada maxima) DARI HASIL PERSILANGAN INDUK ALAM Wardana, Ida Komang; Sudewi, Sudewi; Sembiring, Sari Budi Moria; Muzaki, Ahmad
Jurnal Riset Akuakultur Vol 10, No 3 (2015): (September 2015)
Publisher : Pusat Riset Perikanan, Badan Riset dan Sumber Daya Manusia Kelautan dan Perikanan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2774.084 KB) | DOI: 10.15578/jra.10.3.2015.357-369

Abstract

Tiram mutiara merupakan salah satu komoditas andalan dalam budidaya laut. Masalah utama yang dihadapi adalah pasok benih baik kuantitas maupun kualitas. Upaya perbaikan dilakukan dengan perkawinan silang antar varietas tiram dengan tujuan untuk memperbaiki kualitas benih Tiram Mutiara (Pinctada maxima) baik secara fenotip maupun genotip. Induk yang disilangkan secara resiprokal mempunyai karakter nacre putih (P) dan kuning (K) baik populasi Bali maupun Maluku. Hasil penelitian menunjukkan bahwa persilangan dua populasi tersebut menghasilkan tiga varietas yaitu: varietas I (K x P), varietas II (K x K) dan varietas III (P x K). Nilai SR pada fase pediveliger dari ketiga varietas menghasilkan sintasan berturut-turut 65%, 59%, dan 45%. Pertumbuhan varietas III menunjukkan pertumbuhan yang cukup baik dengan kisaran panjang cangkang 3,0-4,5 cm pada umur dua bulan pemeliharaan. Analisis genetik dengan RAPD-DNA menunjukkan bahwa induk-induk yang berhasil memijah mempunyai variasi genetik 0,3755; 0,3938; dan 0,1600. Sedangkan turunan F1 mempunyai variasi genetik lebih rendah yaitu: 0,2738; 0,2667; dan 0,0924.
THE DIGESTIVE TRACT DEVELOPMENT OF THE TIGER GROUPER Epinephelus fuscoguttatus LARVAE TREATED WITH THYROXINE HORMONE Muzaki, Ahmad; Mahardika, Ketut; Mastuti, Indah; Andriyanto, Wawan; Asih, Yasmina Nirmala; Wardana, Ida Komang
Indonesian Aquaculture Journal Vol 7, No 2 (2012): (December 2012)
Publisher : Pusat Penelitian dan Pengembangan Perikanan, Badan Penelitian dan Pengembangan Kelautan da

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1208.195 KB) | DOI: 10.15578/iaj.7.2.2012.115-122

Abstract

Thyroxin administration in tiger grouper larval rearing was conducted to determine its effect on development of digestive tract of the larvae. Newly hatched larvae were treated with 0 mg/L (control), 0.1 mg/L, and 0.2 mg/L of thyroxin for 2 hours in a 30 L tank before were transferred into a 1 m3 rearing tank. Samples were collected daily until 10 DAH and every 3 days until 40 DAH. Development of digestive tract was observed using histological method. For all treatments, the digestive tract was the same on 1 DAH and 2 DAH. The digestive tract of 1 DAH larvae was still closed and still in the form of a simple tube. The mouth, buccopharynx, liver, pancreas, and rectum were found on 2 DAH. On 3 DAH, the esophagus, stomach, intestines, and anus started to develop. At this stage, the digestive tract of larvae treated with and without thyroxin started to become distinguishable. Several goblet cells were noticed in the rectum of the treated larvae but not in the control. Digestive tract developed earlier in treated larvae compared to the control group, such as appearance of tongue, gill raker, fundic, and cardiac stomach development, formation of pharyngeal tooth, and gastric gland. Metamorphosis of larvae into juvenile on treated larvae occurred than that the control larvae earlier.
FLUCTUATING ASYMMETRY REFLECT THE GROWTH OF HYBRID GROUPER Epinephelus fuscoguttatus AND Epinephelus polyphekadion Sugama, Ketut; Muzaki, Ahmad; Permana, I Gusti Ngurah; Haryanti, Haryanti
Indonesian Aquaculture Journal Vol 9, No 2 (2014): (December 2014)
Publisher : Pusat Penelitian dan Pengembangan Perikanan, Badan Penelitian dan Pengembangan Kelautan da

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (313.816 KB) | DOI: 10.15578/iaj.9.2.2014.97-102

Abstract

Fluctuating asymmetry has been widely used as a measure of developmental stability and as an indicator of individual fish growth. The present study compared fluctuating asymmetry in three bilateral meristic traits of F-1 hybrid between female Epinephelus fuscoguttatus and male Epinephelus polyphekadion and two F-1 pure parental progenies. The fishes were reared by communal and separate tank systems. Hybrids were confirmed by allozymes electrophoresis. After three months of rearing, the F-1 hybrids fish grew faster 45.9% and 66.6% compare to the F-1 pure parental progenies of E. fuscoguttatus and E. polyphekadion (P<005) respectively. Development stability as measured by fluctuating asymmetry was lower in hybrid (20%-40%) than in the pure parental progenies (53%-80%). Among four enzyme loci examined, only Pgm locus showed variants and at that locus all hybrids fish were heterozygous. Heterozygous hybrids showed lower fluctuating asymmetry and related to higher developmental stability. The higher developmental stability positively reflected a faster growth rate. Thus this finding can be used to explain the reason that why hybrids groupers appeared grew faster than parental species.
KULTUR MIKROALGA Haematococcus pluvialis UNTUK MENGHASILKAN ASTAXANTIN Muzaki, Ahmad; Fahrudin, Fahrudin; Wardana, Ida Komang; Haryanti, Haryanti
Jurnal Riset Akuakultur Vol 3, No 3 (2008): (Desember 2008)
Publisher : Pusat Riset Perikanan, Badan Riset dan Sumber Daya Manusia Kelautan dan Perikanan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1519.438 KB) | DOI: 10.15578/jra.3.3.2008.351-361

Abstract

Mikroalga merupakan sumberdaya biologis yang eksklusif dan berperan sangat luas untuk aplikasi penyedia komponen bernilai tinggi di bidang perikanan dalam rangka peningkatan ekonomi. Tujuan riset ini adalah mendapatkan teknik pengkulturan Haematococcus pluvialis dan teknik stimulasi melalui penyinaran sel untuk menghasilkan produk astaxantin. Media tumbuh Bold (PIV metal) dan modifikasi Bold (Clewat-32) diujikan untuk pengkulturan. Pengkulturan juga diterapkan dengan menggunakan 6 jenis air tawar dari sumber berbeda (mata air alam, sumur artesis, air mineral kemasan I, air mineral kemasan II, air sumur, dan air PAM). Efek stres dilakukan melalui penyinaran dengan UV selama 3 jam dan inkubasi lanjutan dengan menggunakan penyinaran intensitas cahaya tinggi untuk mendapatkan sel merah yang mengandung astaxantin. Hasil yang diperoleh menunjukkan bahwa pertumbuhan sel H. pluvialis pada media Bold (PIV metal) lebih baik (55 x 104 sel/mL) dan air tawar yang berasal dari mata air alam menghasilkan kepadatan sel lebih tinggi (166 x 104 sel/mL) pada hari ke-5 dan 245 x104 sel/mL pada hari ke-13 dibandingkan air dari sumber lainnya. Penyinaran UV dan dilanjutkan dengan penyinaran intensitas cahaya tinggi mempercepat perubahan warna sel dan produksi metabolit sekunder sebagai astaxantin. Microalgae are exclusive biological resources to provide valuable compounds in fisheries. The purpose of the research was to evaluate culture technique of H. pluvialis and stimulation technique through UV irradiation to produce astaxanthin. Growth media of Bold (PIV metal) and Bold (clewat-32) modifications were tested to culture microalgae. Other culture technique applied by using 6 fresh water from various sources (natural fresh water, deep well water, mineral water I, mineral water II, well water, and municipal water supply sample). Stress effects were tested by using UV irradiation for 3 hours and incubation with high light intensity to find red cells containing astaxanthin. Result showed that growth cell of H. pluvialis in BOLD media (PIV metal) was higher (550 x 104 sel/mL) than that of in BOLD modification media. Cell density of H. pluvialis cultured with fresh water from natural source was higher (166 x 104 sel/mL) on day 5th and 245 x104 sel/mL on day 13th compared to other water sources. Effect of UV irradiation and high light intensity stimulated cells color change and produced secondary metabolite of astaxanthin.
SELEKTIF BREEDING UDANG WINDU Penaeus monodon DENGAN KARAKTER PERTUMBUHAN DAN SPF (SPECIFIC PATHOGEN FREE) Wardana, Ida Komang; Muzaki, Ahmad; Fahrudin, Fahrudin; Permana, I Gusti Ngurah; Haryanti, Haryanti
Jurnal Riset Akuakultur Vol 3, No 3 (2008): (Desember 2008)
Publisher : Pusat Riset Perikanan, Badan Riset dan Sumber Daya Manusia Kelautan dan Perikanan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1498.468 KB) | DOI: 10.15578/jra.3.3.2008.301-312

Abstract

Riset selektif breeding dengan mengutamakan karakter pertumbuhan dan bebas penyakit (SPF) menjadi pilihan mendesak agar diperoleh calon induk udang windu dengan karakter fenotipe dan genotipe yang lebih baik. Tujuan riset ini adalah mendapatkan teknik selektif breeding dan induk udang hasil seleksi dengan karakter tumbuh cepat serta bebas penyakit (SPF). Metode seleksi diawali dengan pembenihan  induk yang berasal dari alam (F-0) mengikuti kaidah full sib mating, mengaplikasikan teknik probiotik, biosecurity, dan pemantauan infeksi virus. Diagnosis bebas penyakit (SPF) dilakukan dengan pengujian 7 jenis virus (TSV, WSSV, IHHNV, YHV, BP, MBV, HPV). Hasil yang diperoleh menunjukkan bahwa 8 famili udang generasi pertama (F-1) memberikan keragaan fenotipe yang bervariasi (ukuran besar, sedang/reguler, dan kecil). Benih generasi pertama (F-1) hasil seleksi fenotipe pertumbuhan cepat (0,78%—9,91%) dari populasi benih udang kemudian dipelihara untuk calon induk. Induk udang yang digunakan pada saat dan setelah pembenihan mempunyai karakter SPF, demikian pula generasi pertama (F-1), walaupun ada kontaminasi IHHNV pada benih dari induk  -18,  -19,  -22. Keragaan genotipe induk udang (F-0) dan generasi pertama (F-1) menunjukkan keragaman genetik yang berbeda. Nilai heterozigositas pada induk udang (F-0) sebesar 0,1436; sedangkan pada generasi pertama (F-1) dengan tumbuh cepat sebesar 0,2659. Penanda gen untuk tumbuh cepat ditunjukkan pada gen dengan berat molekul 1.025 bp, 1.280 bp, dan 1.325 bp serta susunan sequence DNA yang berbeda bila dibandingkan pada penanda gen udang tumbuh lambat.Selective breeding focusing on growth and Specific Pathogen Free (SPF) is a priority to obtain genetically and morphologically better of black tiger shrimp spawner. The objective of the study was to develop selective breeding technique and select spawner better character on growth and Specific Pathogen Free (SPF). Selection method was initiated from the breeding of wild shrimp spawners (F-0) following full sib mating method, probiotics application, biosecurity, and virus diseases diagnosis. Diagnosis of SPF was tested on 7 viruses (TSV, WSSV, IHHNV, YHV, BP, MBV, HPV) by IQ-2000 kit. Result showed that 8 families of first generation (F-1) shrimp phenotypically varied (big, regular and small size). First generation of shrimp produced from phenotype selection with fast growth (0.78%—9.91%) of total fry polulation then reared till reached spawner size. Shrimp spawners used before and after breeding had SPF traits, similar with the first generation of shrimp fry. There was IHHNV contamination on shrimp (F-1) offsprings from  -18,  -19,  -22. Genotype performance shrimp spawner (F-0) and the first generation (F-1) showed different genetic variations. Heterozigosity value of shrimp spawner (F-0) was 0,1436 and the first generation (F-1) with fast growth trait was 0,2659. Gene marker of fast growth was indicated by a gene with molecular weight of 1,025 bp; 1,280 bp; and 1,325 bp and different DNA sequences compared with gen marker of slow growth shrimp.