Open AccessAnalysis of nitrogen and phosphate in hybrid grouper media for better understanding of water management practices
Author(s) -
Afifah Nasukha,
Reagan Septory,
Ahmad Muzaki
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/718/1/012029
Subject(s) - grouper , nitrate , nitrite , nitrogen , phosphorus , ammonia , zoology , nutrient , environmental science , filtration (mathematics) , fish <actinopterygii> , fishery , biology , environmental engineering , chemistry , ecology , mathematics , biochemistry , organic chemistry , statistics
Indonesia is globally known as the third biggest grouper producer, but its production lately raises some environmental concerns. Aims of this study were identification of nitrogen and phosphorus concentrations derived from feed and metabolism of hybrid grouper. Simple vessels were built and arranged into five main components in culture system: culturing tank, sedimentation, oxygenation, reservoir and filtration. Two sets of systems were used as study replications. Twenty juveniles of the hybrid were stocked in 100 L culture tanks and fed to satiation. Four testing times were taken: at initial (0), 1, 3 and 6 hours after feeding. Results showed that nitrogen contents (ammonia, nitrite, nitrate and total nitrogen was performing nitrogen cycle starting from 0 and peaked at 3 to 6 hour after feeding time. The highest values were majority found in culture tank at 0.08; 0.0015; and 1.372 ppm for ammonia, nitrite and nitrate, respectively. The highest values of total nitrogen and total phosphates were 1.9 and 0.33 ppm that slightly fluctuated over the period even though still in fair values. This study also documented that feeding intake was relatively high (14.78% of feed/BW) that may indicate greater degree in generating solid waste materials to water media.