Didik Ariyanto
Loka Riset Pemuliaan dan Teknologi Budidaya Perikanan Air Tawar

Published : 34 Documents
Articles

Found 34 Documents
Search

VARIABILITAS GENETIK DAN EVALUASI HETEROSIS PADA PERSILANGAN ANTAR GALUR DALAM SPESIES IKAN MAS

Zuriat Vol 15, No 2 (2004)
Publisher : Zuriat

Show Abstract | Original Source | Check in Google Scholar

Abstract

Ikan mas merupakan ikan budidaya air tawar yang memiliki nilai ekonomis sangat penting. Dalam budidayanya dikenal ada banyak galur ikan mas yang berkembang di masyarakat. Banyaknya galur tersebut mengindikasikan tingginya variabilitas genetik ikan mas. Hal ini memberikan peluang untuk mengeksploitasi potensi genetik pada masing-masing galur untuk tujuan pemulaiaan komoditas tersebut. Penelitian dilakukan untuk mengetahui variabilitas genetik dan nilai heterosis karakter pertumbuhan dari persilangan antara 3 galur ikan mas yaitu galur majalaya, rajadanu dan sutisna. Hasil penelitian menunjukkan bahwa nilai variabilitas genetik ketiga galur ikan mas termasuk ke dalam kategori rendah. Persilangan sangat baik dilakukan antara ketiga galur tersebut dalam rangka meningkatkan variabilitas genetiknya. Nilai heterosis karakter pertumbuhan yang diindikasikan dengan karakter bobot dan panjang tergolong rendah, yaitu berkisar antara 0.10–0.13 dan (–1.88)–8.37.

Analisis Keragaman Genetik Tiga Strain Ikan Nila dan Satu Strain Ikan Mujair Berdasarkan Karakter Morfologinya

Zuriat Vol 14, No 1 (2003)
Publisher : Zuriat

Show Abstract | Original Source | Check in Google Scholar

Abstract

Penelitian untuk mengidentifikasi keragaman genetik tiga strain ikan nila (Oreochromis niloticus) dan satu strain ikan mujair (O. mossambicus) telah dilakukan dengan menggunakan metode pengukuran baku dan analisis multivariasi. Sebelas karakter diukur dari 141 sampel ikan yang mewakili tiga strain yaitu nila 69, nila GIFT (Genetic Improvement of Farmed Tilapia) G-3 dan nila GIFT G-6 dan 54 sampel yang mewakili ikan mujair. Analisis ragam multivariasi dan analisis komponen utama (Principal Component Analysis/PCA) digunakan untuk mengeksplorasi pola-pola keragaman morfologi yang menggambarkan keragaman genetik dari empat strain ikan tersebut. Penelitian ini dilakukan dengan tujuan untuk mendapatkan data dasar keragaman genetik ikan nila dan mujair melalui pendekatan morfologis, yang selanjutnya berguna untuk tujuan pemuliaan dan pengembangan komoditas tersebut. Hasil penelitian menunjukkan bahwa secara morfologi, bentuk tubuh ikan mujair berbeda dengan ikan nila. Ikan nila 69 cenderung mirip dengan ikan nila GIFT G- 3 dan G-6. Keragaman bentuk tubuh ikan nila dan mujair dipengaruhi oleh factor umur, faktor genetik dan lingkungan serta interaksi antara faktor genetik dan lingkungan.

MANFAAT WORKSHOP PENELITIAN TINDAKAN KELAS DAN PENULISAN KARYA ILMIAH BAGI KELOMPOK KERJA GURU GUGUS SEKOLAH SATRIYO UTOMO KECAMATAN NGAWEN BLORA TAHUN 2010

E-DIMAS Vol 2, No 01/Maret (2011): E-DIMAS
Publisher : E-DIMAS

Show Abstract | Original Source | Check in Google Scholar

Abstract

Abstract This report describes how physic teachers’ competency can be strengthening by exploring their writing capability through a workshop conducted by team of community service. This training was given to KKG / teachers’ group of Satriyo Utomo Ngawen Blora in 2010. The materials are how to find the topic, how to write a proposal of classroom research, and how to arrange a report of classroom action research, then how to make it into an article. By having these skills, it is expected that they will be able to arrange their own action research and article in order to raise their grade and prosperity. Team also gives them a full advice for those who want to make a proposal, a report and an article until they enable make their own classroom research by themselves. Through this training, KKG Satriyo Utomo Ngawen feels that it is really needed to sharpen and empower their writing skill especially writing a classroom action research and an article. Key words : teachers’ competency, a classroom action research, an article.

MANFAAT WORKSHOP PENELITIAN TINDAKAN KELAS DAN PENULISAN KARYA ILMIAH BAGI KELOMPOK KERJA GURU GUGUS SEKOLAH SATRIYO UTOMO KECAMATAN NGAWEN BLORA TAHUN 2010

E-Dimas: Jurnal Pengabdian kepada Masyarakat Vol 2, No 1 (2011): E-DIMAS
Publisher : Universitas PGRI Semarang

Show Abstract | Original Source | Check in Google Scholar | Full PDF (173.871 KB)

Abstract

Abstract This report describes how physic teachers?óÔé¼Ôäó competency can be strengthening by exploring their writing capability through a workshop conducted by team of community service. This training was given to KKG / teachers?óÔé¼Ôäó group of Satriyo Utomo Ngawen Blora in 2010. The materials are how to find the topic, how to write a proposal of classroom research, and how to arrange a report of classroom action research, then how to make it into an article. By having these skills, it is expected that they will be able to arrange their own action research and article in order to raise their grade and prosperity. Team also gives them a full advice for those who want to make a proposal, a report and an article until they enable make their own classroom research by themselves. Through this training, KKG Satriyo Utomo Ngawen feels that it is really needed to sharpen and empower their writing skill especially writing a classroom action research and an article. Key words : teachers?óÔé¼Ôäó competency, a classroom action research, an article.

ANALISIS KERAGAMAN MORFOMETRIK DAN GENETIK PADA STRAIN IKAN MAS (Cyprinus carpio)

Jurnal Perikanan Universitas Gadjah Mada Vol 10, No 1 (2008)
Publisher : Universitas Gadjah Mada

Show Abstract | Original Source | Check in Google Scholar

Abstract

The aim of this research was to identify the morphological and genetical variability in four strains of common carp (Cyprinus carpio) i.e. Majalaya, Rajadanu, Wildan and Sutisna. The study was conducted by analysis of truss morphometric and electrophoresis. Principal Component Analysis (PCA) was conducted to explore the patterns of body shape variability and the grouping among strains. The Degree of polymorphism, heterozigosity and genetic distance were used to identify the structure of populations. The results showed that the truss morphometric on head and caudal peduncle were the most contribute cells to distinguish the variability among strains. Based on genetic parameters analysis, strain of Rajadanu, Sutisna and Wildan were originaly coming from one strain with genetic distance about 0.0018 to Majalaya strain. Body shape similarity of Wildan and Majalaya strains was more influenced by their environment.

Pendugaan Mutu Genetik Induk Ikan Patin Siam (Pangasius hypophthalmus) dari Beberapa Sentra Produksi Benih Berdasarkan Keragaan Anakannya

Jurnal Perikanan Universitas Gadjah Mada Vol 9, No 1 (2007)
Publisher : Universitas Gadjah Mada

Show Abstract | Original Source | Check in Google Scholar

Abstract

The purpose of this research was to estimate the genetic quality of siamese catfish (Pangasius hypophthalmus) from various seed production centres.The broodstocks genetic quality were estimated based on their progeny performances.The result showed that the population growth rates, individually average weight, FCR, survival rate and productivity of seeds from Central Java (Ungaran), West Java (Sukamandi and Sukabumi) and Jakarta were 6.89, 6.08, 5.61 and 5.37 g/day; 47.08, 39.64, 36.80 and 35.51 g/individually fish; 0.82, 0.87, 0.94 and 1.00; 76.80, 86.77, 86.43 and 85.66%; 366.99, 343.95, 318.02 and 304.21 kg/10.000 fishes/8 weeks, respectively.

Evaluasi Laju Pertumbuhan, Keragaman Genetik Dan Estimasi Heterosis pada Persilangan Antar Spesies Ikan Patin (Pangasius sp.)

Jurnal Perikanan Universitas Gadjah Mada Vol 8, No 1 (2006)
Publisher : Universitas Gadjah Mada

Show Abstract | Original Source | Check in Google Scholar

Abstract

Thai catfish (Pangasius sp.) is one of the most popular cultured catfish in Indonesia. There are 2 species Thai catfish i.e. P. hypopthalmus which introduced from Thailand in 1972 and P. djambal an endogenous Indonesian fish. The aims of this research were to evaluate the growth rate, genetic variability and heterosis estimacy on interspecific crossing of these species. The result showed that the growth rate of F1 P. hypopthalmus X P. djambal was better than its parents. Genetic variability of P. hypopthalmus, P. djambal and their hybrids were 12.54, 12.38, and 27.02, respectively, and heterosis estimacy of their hybrids on growth (length and weight) were in high categories about 48.98-257.90%.

OPTIMASI PEMBERIAN PAKAN BUATAN PADA PENDEDERAN IKAN PATIN (Pangasionodon hypohpthalmus) DI KOLAM YANG DIPUPUK

Jurnal Perikanan Universitas Gadjah Mada Vol 10, No 1 (2008)
Publisher : Universitas Gadjah Mada

Show Abstract | Original Source | Check in Google Scholar

Abstract

This research aimed to know the optimum formulated feeding patin (Pangasionodon hypohpthalmus) in the fingerling rearing in the fertilized pond. The fish seed were stocked in the fifteen cages of 3x2x1.25 m that were installed in the 50 m2 pond. Each cage was stocked with 600 fish with an average initial weight of 0.37 g and average body length of 2-3 cm. The treatments applied in this research were (A) without formulated feed, (B) 5% of biomass of formulated feed, (C) 10% of biomass of formulated feed, (D) 15% of biomass of formulated feed and (E) 20% of biomass of formulated feed. The protein level of the formulated feed was around 40%. The observations focused on the survival rates of fish, feed conversion ratios, body weight and length. The results showed that there were significant differences among fish treatments on the survival rates, feed conversion, weight and length growth (P<0,05). The survival rates of fish of the treatment A, B, C, D and E were 78.10%, 84.39%, 83.78%, 90.83% and 90.33%, respectively. The feed conversion of the feed given treatments i.e. B, C, D and E were 0.35, 0.62, 0.89 and 1.15, respectively. The weight growth during observation period (6 weeks) were 5.63 g, 15.29 g, 23.37 g, 39.17 g and 42.13 g for the treatments A, B, C, D and E, respectively, while the length increment for those treatments were 4.63 cm, 7.81 cm, 8.91 cm 1.5 cm and 11.05 cm, respectively. The water quality parameters were in the suitable range for fish growth.

OPTIMASI PADAT PENEBARAN LARVA IKAN PATIN SIAM (Pangasius hypophthalmus) PADA PEMELIHARAAN SISTEM INTENSIF

Jurnal Perikanan Universitas Gadjah Mada Vol 10, No 2 (2008)
Publisher : Universitas Gadjah Mada

Show Abstract | Original Source | Check in Google Scholar

Abstract

The goal of this activity was to improve the productivity of Siamese catfish (Pangasius hypophthalmus) backyard hatchery. The research was conducted to identify the optimum density of larvae in the intensive rearing system. Two days post hatching larvae of P. hypophthalmus reared in 18 fiberglass containers size 40x30x30 cm3. The treatment used was 50, 100 and 150 fishes/litre in 6 replicates. A water recirculation system was used in this study and a hi-blower aeration system for oxigen supplay was added in it. The result showed that the density of larvae was not significant difference (P<0,05) for the survival rate at day-30, i.e. 21.34%; 19.78% and 19.71% for 50, 100 and 150 fishes/litre density of larvae, respectively. But the density of larvae was significant difference (P>0,05) for body weight at day-30, i.e. 0.47; 0.34 and 0.25 g/fishes for 50, 100 and 150 fishes/l, respectively.

Koefisien Variabilitas Genetik dan Nilai Duga Heritabilitas Karakter Pertumbuhan Ikan Nila GIFT di Sukamandi

Jurnal Perikanan Universitas Gadjah Mada Vol 8, No 2 (2006)
Publisher : Universitas Gadjah Mada

Show Abstract | Original Source | Check in Google Scholar

Abstract

This study conducted to identify the genetic variability and heritability of nile tilapia strain GIFT (Genetic Improvement of Farmed Tilapia) cultured in Sukamandi, West Java. Analysis of morphology was measured with the conventional morphometric including total length, standard length, head length, maximum body depth, maximum body thickness and maximum body outliner. Genetic variability and broad sense heritability estimated with genotype and phenotype variance. The result showed that coefficient of genetic variability of total length, standard length, head length, maximum body depth, maximum body thickness and maximum body outliner were in low to moderate categories (0.48-3.78) and broad sense heritability estimation for this characters were in high categories (0.70-0.76).