Garuda - Garba Rujukan Digital

Gunawan Pratama Yoga

LIPI

Author-ID : 6059356

Chemical Engineering, Chemistry & Bioengineering Earth & Planetary Sciences Environmental Science

Published : 2 Documents Claim Missing Document

Claim Missing Document

Articles

Ammonia Toxicity to Rinuak (Gobiopterus brachypterus) of Lake Maninjau Gunawan Pratama Yoga; Octavianto Samir
Indonesian Journal of Limnology Vol. 1 No. 1 (2020): Indonesian Journal of Limnology
Publisher : Indonesian Society of Limnology

Rinuak (Gobiopterus brachypterus) has an important economic value for local communities in Lake Maninjau - West Sumatra. The catch of G. brachypterus is decreasing along with the decline of the water quality. Ammonia is considered one of the most toxic pollutants in the aquatic ecosystem. It can be produced from the natural decomposition of organic matter or excreted by aquatic organisms as a nitrogenous waste product. Therefore, the information about toxicity ammonia in G. brachypterus is important as a management tool for fish conservation in Lake Maninjau. This research was aimed to find the LC50 value of ammonia in G. brachypterus. A static acute toxicity test was conducted for 96 hours. The fish were exposed to different test chemical concentration level for 96 hours, under static conditions. Mortality was recorded and concentration killed 50% of the fish was determined as LC50-96h, No Observed Effect Concentration (NOEC), and Lowest Observed Effect Concentration (LOEC). Values of LC50-96h, No Observed Effect Concentration (NOEC) and Lowest Observed Effect Concentration (LOEC) were 11.62 mg/L TAN or 0.27 mg/L NH3, 5 mg/L TAN or 0.12 mg/L NH3 and 16 mg/L TAN or 0,37 mg/L NH3, respectively. Ammonia’s Maximum Acceptable Tolerant Concentration (MATC) for G. brachypterus was 8.9 mg/L TAN or 0.21 mg/L NH3. The acute toxicity result showed that Rinuak (G. brachypterus) was sensitive to ammonia. The information about ammonia toxicity data is important for the determination of water quality guidelines in Lake Maninjau.

Acute Toxicity of NH4Cl to Tambra Fish (Tor Tambroides) Fry Gunawan Pratama Yoga; Kristin Noni Riyanti Buraen; Sutanto Sutanto
Indonesian Journal of Limnology Vol. 2 No. 2 (2021): Indonesian Journal of Limnology
Publisher : Indonesian Society of Limnology

Ammonia is one of the nutrient wastes products which can be toxic to all vertebrates, including fish. Usually, ammonia toxicity is expressed as Total Ammonia Nitrogen (TAN, mgN/L). Tambra fish (Tor tambroides) is freshwater fish with important economic value in some areas in Indonesia. According to overfishing and forest degradation, the fish has become threatened. This research aimed to calculate the LC50 value of ammonia to Tambra fish (Tor tambroides) and estimate NOEC, LOEC, and MATC values of ammonia to Tambra fish (Tor tambroides). This study was conducted using the static test method with two steps. The first stage is a preliminary test, where the preliminary test is observed for 24 hours With five concentrations excluding control. Whereas in the second stage that is carried out, observation for 96 hours with four concentrations excluding control. The Probit test is Performed to obtain LC50 value results, then proceed with ammonia analysis using the Salicylate Test Kit method. The results showed that ammonia had acute toxicity with LC50-96 hour value of NH4Cl against Tambra fish fry (Tor tambroides) in the amount of 354.615 mg/L. Ammonia caused acute toxicity to Tambra fish fry (Tor tambroides).The LC50-96 hour value was 354.615 mg/L in the form of Total Ammonia Nitrogen (TAN) or it was equivalent to un-ionized Ammonia (NH3) of 9.8937 mg/L, while values of the Lowest Observed Effect Concentration (LOEC) and No Observed Effect Concentration (NOEC) of ammonia on Tambra fish (Tor tambroides) were 578.24 mg/L and 280.18 mg/L, respectively.

Title

Found 2 Documents
Search

Abstract

Abstract

Title Search

Found 2 Documents Search

Abstract

Abstract

Title

Found 2 Documents
Search