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Journal : Jurnal Perikanan Universitas Gadjah Mada

Status Limnologis Situ Cilala Mengacu pada Kondisi Parameter Fisika, Kimia, dan Biologi Perairan Pratiwi, Niken T.M.; Adiwilaga, Enan M.; Basmi, Johan; Krisanti, Majariana; Hadijah, Oji; K., Pieka Wulandari
Jurnal Perikanan Universitas Gadjah Mada Vol 9, No 1 (2007)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfs.67

Abstract

The purpose of this research was to study the limnological status of Cilala reservoir, based on physical, chemical, and biological parameters. The observation comprised some morphometric of surface and vertical dimension, water quality measurements, plankton community structure, and primary productivity. Based on some morphometric condition, Cilala reservoir has a high potention of biological productivity, but the area of lake begins narrowing. The physical and chemical characteristic showed that Cilala reservoir was still in good condition. The condition of Total Suspended Solid (TSS) at inlet and the water debit of outlet showed that the waters has a relatively high potention of sedimentation that lead to a shallowing condition. There were found 95 genus of phytoplankton from seven classes (Bacillariophyceae, Chlorophyceae, Cyanophyceae, Chrysophyceae, Euglenophyceae, Pyrrophyceae, and Xanthophyceae). It was also found four major groups of zooplankton, i.e. Rotifera, Copepoda, Cladocera, and Protozoa. Although the primary productivity was relatively low, based on orthophosphate, chlorophyll-a, and Nygaard Index, the water was in mesotrophic-eutrophic status. As a whole, Cilala reservoir was still appropriate for fisheries activities.
Penilaian Kualitas Air Berdasarkan Sistem Saprobik di Sungai Ciapus Krisanti, Majariana; Pratiwi, Niken T.M.
Jurnal Perikanan Universitas Gadjah Mada Vol 9, No 2 (2007)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (619.639 KB) | DOI: 10.22146/jfs.48

Abstract

Changes of environment could also changes the organisms, as individual, population, or community therefore the appearance of an organism could be applied as biological indicator of those environments. Simple methods were introduced in England, Australia, Thailand, and Indonesia. The objective of this study was to evaluate water quality of Ciapus river using simple kit based on saprobic system. An Illustrated cover and inserted paper were used as kit to evaluate the river water quality. Using this kit, the appearance of specific organisms were used as key to evaluate the river water quality of Ciapus River directly. Samples were taken from two segment of Ciapus River i.e. upper and middle part. According to the method, the upper segment of Ciapus River was categorized as very good condition, while the middle part was in moderate condition.