ENVIRONMENTAL IMPACT OF TROUT FARMS ON THE ESEN STREAM (MUGLA), TURKEY


Tekinay A. A. , Cevik N., Guroy D.

FRESENIUS ENVIRONMENTAL BULLETIN, cilt.19, ss.1290-1294, 2010 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 19 Konu: 7
  • Basım Tarihi: 2010
  • Dergi Adı: FRESENIUS ENVIRONMENTAL BULLETIN
  • Sayfa Sayıları: ss.1290-1294

Özet

The purpose of the present study was to evaluate the environmental effects of four trout farms on the water quality of the Esen Stream, South-Western Turkey, between February and December 2006. Water quality was monitored by bi-monthly sampling inlet and outlet water of each farm, at the same hour of the sampling day. The dissolved oxygen (DO) concentrations of the effluent water of the farms A, C and D were significantly lower compared to the inlet DO levels (p<0.05). Although an increase in the biochemical oxygen demand (BOD(5)), chemical oxygen demand (COD), total phosphorus (TP) and total nitrogen (TN) was observed in the effluents of all farms, this increase was significant only for the COD value of farm D (p<0.05). The total annual phosphorus and nitrogen loads of the farms on the receiving water were estimated to be 37.575 tons and 197.55 tons, respectively. The TP load of the farms in terms of kg P per ton of fish produced per farm were found to be between 10.82 and 12.32, while the TN load was in the range of 58.77 and 66.18 kg N per ton of fish produced.

The purpose of the present study was to evaluate the environmental effects of four trout farms on the water quality of the Esen Stream, South-Western Turkey, between February and December 2006. Water quality was monitored by bi-monthly sampling inlet and outlet water of each farm, at the same hour of the sampling day. The dissolved oxygen (DO) concentrations of the effluent water of the farms A, C and D were significantly lower compared to the inlet DO levels (p<0.05). Although an increase in the biochemical oxygen demand (BOD(5)), chemical oxygen demand (COD), total phosphorus (TP) and total nitrogen (TN) was observed in the effluents of all farms, this increase was significant only for the COD value of farm D (p<0.05). The total annual phosphorus and nitrogen loads of the farms on the receiving water were estimated to be 37.575 tons and 197.55 tons, respectively. The TP load of the farms in terms of kg P per ton of fish produced per farm were found to be between 10.82 and 12.32, while the TN load was in the range of 58.77 and 66.18 kg N per ton of fish produced.