Asian Science Citation Index is committed to provide an authoritative, trusted and significant information by the coverage of the most important and influential journals to meet the needs of the global scientific community.  
ASCI Database
308-Lasani Town,
Sargodha Road,
Faisalabad, Pakistan
Fax: +92-41-8815544
Contact Via Web
Suggest a Journal
Journal of Fisheries and Aquatic Science
Year: 2017  |  Volume: 12  |  Issue: 4  |  Page No.: 191 - 196

Levels of Available Nitrogen-Phosphorus Before and After Fish Mass Mortality in Maninjau Lake of Indonesia

Hafrijal Syandri, Azrita, Junaidi and Ainul Mardiah    

Abstract: Background and Objective: Maninjau lake is one of the important locations for aquaculture activity for many local people in Indonesia. The objective of the current research was to estimate the Nitrogen (N), Phosphorus (P) and Total Organic Matter (TOM) before and after fish mass mortality in Maninjau lake. Materials and Methods: This research was conducted in February, 2017, four months after mass mortality occurred. Nile tilapia (Oreochromis niloticus) and Common carp (Cyprinus carpio) mortality were occurred in August and September, 2016. Data were collected from four stations on Maninjau lake (Muko-Muko, Pasa, Pandan and Sungai Tampang). Water samples were taken from the surface (depth 0.1 m) and under floating net cages (depth 30 m) at each station and analyzed for N, P and TOM content. Water quality data taken in February, 2016 was used as a comparison. The differences between N, P, TOM, Particulate Organic Matter (POM) and Dissolved Organic Matter (DOM) levels before and after fish mass mortality were analyzed using a student t-test. Any differences between stations were analyzed using one-way ANOVA was performed using SPSS computer software. Results: The levels of N and P before and after fish mass mortality were significantly different (p<0.05). The N levels at surface ranged from 1.83-2.30 mg L–1. At 30 m, N levels ranged from 2.11-2.60 mg L–1. The P levels ranged from 0.50-0.91 mg L–1 and 0.81-0.92 mg L–1 at 0.1 and 30 m depths, respectively. The N level tended to the limiting factor for algae growth at each station (all N/P<16). The TOM levels before and after fish mass mortality ranged from (Mean±SD) 4.55±0.02-16.33±0.01 mg L–1 and 6.97±0.72-19.04±0.04 mg L–1 at 0.10 and 30 m depths, respectively. Conclusion: The availability of N, P and TOM in the water was significantly higher (p<0.05) after fish mass mortality and had a negative effect on the water quality of Maninjau lake.

Cited References   |    Fulltext    |   Related Articles   |   Back
  Related Articles

Copyright   |   Desclaimer   |    Privacy Policy   |   Browsers   |   Accessibility