PENGARUH KUALITAS FISIKA KIMIA PERAIRAN TERHADAP USAHA BUDIDAYA IKAN DI DANAU BULILIN KABUPATEN MINAHASA TENGGARA
ABSTRACT: The research was
conducted to determine the condition of physicochemical quality of waters and
its effect on the sustainability of aquaculture in Bulilin Lake. The study was
conducted at Lake Bulilin, Southeast Minahasa Regency in September 2016 (dry
season) until January 2017 (rainy season). Measurement of physicochemical
quality of waters was conducted in situ at 9 stations: station 1, 2, 3 (not
aquaculture area); station 4, 5, 6 (aquaculture area) and station 7, 8, 9
(floating restaurant area). Laboratory
analysis of water samples from three stations, namely station A (not
aquaculture area), station B (aquaculture area) and C (floating restaurant
area), was done at the Board of Research
and Industrial Standardization Manado. Primary data were collected by interview
to aquaculturist and field observation on aquaculture effort in Bulilin
Lake. The results of the study showed
that water temperature range from 27 - 32oC, total dissolved solid 0.239 –
0.305 g/l, brightness 40 – 72.5 cm, pH 6.44 - 9, dissolved oxygen 3 – 5.18
mg/l, Nitrate 1.93 - 5.67 mg/l, nitrite 0 mg/l, ammonia 0 - 0.22 mg/l and
phosphate 0 - 0.60 mg/l. These result
indicated that water quality condition is still in accordance with the quality
standard for fish culture except ammonia.
High ammonia level caused overgrown of Eichhornia crassipes (eceng
gondok). The sustainability of fish culture at present is relative fluent and
beneficial even though the waters have been overgrown with weed water
hyacinth. However for the sustainability
of the aquaculture effort in Bulilin Lake it is necessary to manage the waste
to Bulilin Lake.
Keywords: Lake Bulilin,
physicochemical quality of waters , fish culture
Penulis: Agmilda A. Kabalmay,
Novie P.L. Pangemanan, Suzanne L. Undap
Kode Jurnal: jpperikanandd170386
