Open AccessWater quality, plankton community, and pollution index in the spawning habitat of longtail shad (Tenualosa macrura) in the waters of Bengkalis, Meranti Island and Siak Regencies, Riau Province
Author(s) -
Vivin Seygita,
. Sulistiono,
Cecep Kusmana,
Gatot Yulianto
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 - 10.1088/1755-1315/744/1/012074
Subject(s) - salinity , estuary , plankton , zooplankton , fishery , nitrate , environmental science , hatchery , water quality , phytoplankton , biology , ecology , fish <actinopterygii> , nutrient
The waters of Bengkalis (as the estuary of Siak River) in Meranti and Siak Regencies of Riau Province is known as longtail shad ( Tenualosa macrura ) spawning area. This study aims to describe the condition of the waters of the fish spawning habitat. Sampling was conducted for three months from September to November 2019. The physical, chemical, and biological parameters were observed i.e. temperature, depth and transparency, salinity, TSS, pH, DO, nitrate (NO 3 ), phosphate (PO 4 ), BOD, lead (Pb), and mercury (Hg), plankton abundance, and diversity. The result showed the waters temperatures, depth, transparency, salinity, TSS, pH, and DO varied i.e., 26.7-30.3 °C, 4-30 m, 0.27-0.835 m, 25-30 ppt, <3-88 mg/l, 7, and 5.9-7.9 mg/l, respectively. The nitrate, phosphate, BOD, Pb, and Hg were 0.617-2.196 mg/l, 0.006-1.666 mg/l, 0.80-11 mg/l, 0.002-0.094 mg/l and <1 mg/l respectively. The most common genera of phytoplankton were Trichodesmium sp. (37.293 to 596.688 cells/m 3 ), while the most abundant zooplankton was Tintinnopsis sp (8.421-54.135 cells/m 3 ). According to the study, it is known that the water condition of the fish habitat was reasonably good. However, the nitrate and phosphate in the waters passed the quality standard threshold for fisheries.