Retna Utami
Loka Riset Pemuliaan dan Teknologi Budidaya Perikanan Air Tawar

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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

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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%.

Analysis of the Creative Thinking Ability of Students SMA N 1 Pecangaan Jepara on Environmental Change Material

Journal of Biology Education Vol 7 No 2 (2018): August 2018
Publisher : FMIPA UNNES

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Creative thinking is an ability of creating a new thought as a result from combination of previous knowledge. It is needed to be developed in the 21st century because it is importance in work world. This study aims to analyze the students’ creative thinking of SMA N 1 Pecangaan on environmental material. The research used observational method. Population is whole students of tenth grade of SMA N 1 Pecangaan. The samples used purposive samplings were X MIA 1, X MIA 2 and X MIA 4 with total number 116 students. The students’ creative thinking was tested by essay test and instrument non-test which is scoring rubric of writing article about environment problems. The result showed that students’ creative thinking of SMA N 1 Pecangaan in answering question is 14.7% very creative, 31% creative, 20.7% creative enough and 33.6% less creative. The students’ ability in writing article showed 0% very creative, 16.4% creative, 30% creative enough, 49.1% less creative and 4.3% not creative. The research concluded that the creative thinking ability of students SMA N 1 Pecangaan is low. The highest aspects of creative thinking that is reached by students are originality and fluency, while the lowest is elaboration.

PENGARUH PENGKAYAAN ROTIFERA (Brachionus sp.) DENGAN MINYAK IKAN DAN MINYAK JAGUNG TERHADAP PERTUMBUHAN DAN SINTASAN LARVA IKAN BETUTU (Oxyeleotris marmorata Blkr.)

Jurnal Penelitian Perikanan Indonesia Vol 7, No 2 (2001): (Vol.7 No. 2 2001)
Publisher : Pusat Penelitian dan Pengembangan Perikanan, Badan Penelitian dan Pengembangan Kelautan da

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Abstract

penefitian pengkayaan rotifera (Brachionus sp.) untuk pakan larva ikan betutu (Oxyeleotis marmorata) teian Oitafsanakan di Balai Penelitian Perikanan Air Tawar.