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INDONESIA
Jurnal Perikanan Universitas Gadjah Mada
Published by Universitas Gadjah Mada
ISSN : 08536384     EISSN : 25025066     DOI : -
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology
Jurnal Perikanan Universitas Gadjah Mada are published to promote a critical review of the various investigative issues of interest in the field of fisheries between the researchers, academics, students and the general public, as a medium for communication, dissemination, and utilization of wider scientific activities.
Arjuna Subject : -
Articles 12 Documents
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Search results for , issue "Vol 11, No 2 (2009)" : 12 Documents clear
Peringatan Dini Pencemaran Logam Berat dan Pestisida Berdasarkan Rasio Seks Anakan Daphnia sp. Ahmad S. Mubarak; Juni Triastuti
Jurnal Perikanan Universitas Gadjah Mada Vol 11, No 2 (2009)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (735.911 KB) | DOI: 10.22146/jfs.13

Abstract

Pesticides and heavy metal are the major contributor for environmental pollution and have been spread out widely in aquatic environments. Daphnia sp. is a zooplankton that mostly used to detect aquatic pollution. The aim of this research was to study the effect of exposuring different concentration of heavy metal (Pb and Cd) and pesticides (diazionin) to the sex ratio offspring of Daphnia sp. The experiment composed of three kind of treatments (Cd, Pb and diazinon), each consist of 5 treatments namely 25%, 50%, 75%, 100% and 0% as control, and 4 replications. The data was analyzed with Kruskal Walace. If there was any different in each treatment, then was analyzed with Duncan Double Gap Test and linear regression. The research showed that exposuring Cd, Pb and diazinon with different concentration to the Daphnia sp. during 96 hours could increase the percentage male offspring of Daphnia sp. Concentration of Pb, Cd and peticides gave positive correlation to the sex ratio offspring of Daphnia sp. Further research was needed to know the practical technology using sex ratio offspring of Daphnia sp. to detect the level of pollution.
Pemeliharaan Ikan Beronang, Siganus gutatus sebagai Biokontrol Perkembangan Lumut, Chaetomorpha sp. dan Enteromorpha intestinalis di Tambak Suharyanto Suharyanto
Jurnal Perikanan Universitas Gadjah Mada Vol 11, No 2 (2009)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (838.488 KB) | DOI: 10.22146/jfs.14

Abstract

The aim of this research was to control the growth of green algae (Chaetomorpha sp and Enteromorpha intestinalis) by rabbit fish (Siganus gutatus) reared in brackishwater ponds in different stocking density. The research was conducted in the Research Station of Research Institute for Coastal Aquaculture, Marana, Maros South Sulawesi for 100 days. Nine brackishwater ponds in the size 100 m2 (3 ponds), 125 m2 (3 ponds) and 150 m2 (3 ponds) with the green algae growth were used respectively in this research. Group randomized design was used in this research. This research use three stocking density of rabbit fish in thriplicates that were (A) 20 ind/100m2 , (B) 30 ind/100 m2 (40 ind/125 m2), and (C) 40 ind/100m2 (60 ind/150 m2), respectively. The rabbit fish used in this research were 9.1+ 0.8 cm in length and 15+ 0,6 g in body weigth. The monitored variables were body length and weigth, survival rate and water quality. The result showed that the effect of stocking density not significantly different on the growth of body length and weight and survival rate of rabbit fish reared in brackishwater pond (P>0.05), but significantly different on the productivity of rabbit fish (P<0.05). Green algae growth in the brackishwater ponds could be controlled with the rearing of rabbit fish in the stocking density 20 - 40 ind/100 m2.

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