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Deny Suhernawan Yusup
Lab. Ekologi/Lingkungan, Prodi Biologi, FMIPA Universitas Udayana
Biochemistry, Genetics & Molecular Biology

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EVALUASI PENCEMARAN LOGAM BERAT Timbal (Pb) dan Cadmium (Cd) DI PERAIRAN TELUK BENOA, BALI Annisa Ayu Permana; Deny Suhernawan Yusup
SIMBIOSIS Simbiosis Volume 12 No. 2 2024
Publisher : Program Studi Biologi Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JSIMBIOSIS.2024.v12.i02.p02

Abstract

The waters of Benoa Bay Bali are an area that has dense activity leading to generate pollution, particularly heavy metal pollutant. The objective of this research was to determine the heavy metal pollution, lead (Pb) and Cadmium (Cd) in sea water. The content of lead (Pb) and cadmium (Cd) in sea water was analysed by means of atomic absorption spectrophotometry (AAS). The results showed that the Pb content in seawater was not detected (ttd), while the Cadmium (Cd) content was detected from station II (0.5797 mg/L) and station III (0.3080 mg/L). The pollution index analysis show that the water quality status of Station I is classified as being in good condition, while stations II and III are classified as being in moderately polluted condition. Te STORET analysis shows that the waters of the Benoa Bay Bali area is classified as lightly polluted category (-8).
PENGARUH PEMBERIAN VARIASI PAKAN FERMENTASI TERHADAP PERTUMBUHAN DAN KEPADATAN ROTIFERA (Brachionus plicatilis ) UNTUK PAKAN NENER IKAN BANDENG (Chanos chanos) Mohamad Mediko; Ni Wayan Sudatri; Deny Suhernawan Yusup
SIMBIOSIS Simbiosis Volume 13 No. 1 2025
Publisher : Program Studi Biologi Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JSIMBIOSIS.2025.v13.i09.

Abstract

Brachionus plicatilis is one of the zooplankton that is needed as food for fish larvae. So it is expected that the use of this alternative feed can help hatchery farmers to increase Rotifera production and increase the production of high quality nener. The objectives of the study were to determine the growth of Rotifera in cultures given variations of 4 additional feed ingredients fermented from chicken feces, wheat bran, rice bran and corn bran and to determine the growth response of milkfish (Chanos chanos) seeds fed with Rotifera from the best culture. The additional feed treatment given consisted of 5 factors (4 treatments and 1 control) fermented dried chicken feces, wheat bran, corn bran and rice bran, while the control was phytoplanton from UD Chlorella culture. The fermentation material used was EM4 (Efective Microorganisms 4 from Pt. Songgolangit Persada) The design used was a Randomized Group Design (RAK) with 4 replicate cultures. Giving variations of 4 feed ingredients that have been fermented affects the growth of Rotifera cultures. Growth can be seen from the density of each variation of 4 fermented ingredients namely wheat bran 276,750, corn bran 422,050, rice bran 567,650, chicken feces 169,450, Phytoplankton 77,300. Giving Rotifera cultured with rice bran to the growth of milkfish larvae influenced their growth. Milkfish larvae can grow after being given fermented Rotifera, but the SR value is very low. Milkfish larvae fed with fermented Rotifera had a low SR value of 32,73% mortality rate of 1,373 of 4,500 fish, compared to the SR value of Phytoplanton which was high at 78,15% mortality rate of 3,517 of 4,500 fish. Keywords: Cultivation, Bran, Feces, Culture, Rotifera
KUALITAS AIR BENDUNGAN SUNGAI BADUNG DAN KOLAM PANCING “X” Dewa Ayu Wahyunia Ratna Dewi; Deny Suhernawan Yusup; Ngurah Intan Wiratmini
SIMBIOSIS Simbiosis Volume 13 No. 1 2025
Publisher : Program Studi Biologi Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JSIMBIOSIS.2025.v13.i01.p12

Abstract

The water quality in the northern coastal area of ​​Serangan Island, Denpasar, which receives flow from many large (Tukad) and small (loloan) rivers is indicated to have experienced organic and inorganic pollution including heavy metals. The Badung River Dam and fishing pond "X" located around the northern coastal area of ​​Serangan Island are widely used by the community for fishing activities, so it is necessary to know the quality of the water. The purpose of this study was to determine the water quality of the Badung River dam and the fishing pond "X". The water quality of the Badung River dam has exceeded the threshold of the National Class II water quality standard, DO (1.51 mg/L), pH (5.79), BOD (110.88 mg/L), lead (Pb: 0.24 mg/L) and copper (Cu: 0.29 mg/L) and cadmium (Cd: 0.05 mg/)L. except for water temperature (28oC). Several water quality parameters of the fishing pond “X” have also exceeded the threshold, namely BOD (25.20 mg/L), lead (Pb: 0.05 mg/L), copper (Cu: 0.07 mg/L) and cadmium (Cd: 0.20 mg/L), while the DO parameters (4.33 mg/L), pH (6.26) and water temperature (28.1oC) are still within the threshold range of water quality standards. In general, the water quality of the fishing pond “X” is better than that of the Badung River dam, but monitoring of the heavy metal content (Cd, Pb and Cd) in both waters is needed, which has exceeded the water quality standard class II. Keywords: Ponds, Water quality, Dam Resevoir, Heavy metals, Pollution
Co-Authors Annisa Ayu Permana Dewa Ayu Wahyunia Ratna Dewi Mohamad Mediko Ngurah Intan Wiratmini Ni Wayan Sudatri