Survey on fish and fishery resources of Nong Kom Khor, Nong Khai province
1999
Wirat Jiwyam | Prapas Chaloekpunrat | Thongchai Champasri
Survey on fishery resources of Nong Kom Khor three times during April 1998 to October 1998 at 3 months period. There were 14 families with 26 genera and 34 fish species. The ratio of available prey to predator fish biomass was approximately 1.19. There were 31 species of aquatic macrophytes. Water quality of Nong Kom Khor was not polluted. The averages of pH, conductivity, temperature, total alkalinity, total hardness, dissolved oxygen and Secchi disk visibility of water were 9.46, 87.1+-Scm-1, 33.3+-C, 21.0 mgCaCO3/l, 37.1 mgCaCO3/l, 8.53 mg/l and 81 cm., respectively. The constituents of bottom sediment were varied according to sampling sites. The average pH of bottom sediment was 6.38. The average contents of organic matter, nitrogen and available phosphorus were 1.57 percent, 0.07 percent and 4.82 ppm., respectively. Almost of surface area covered with aquatic macrophytes.
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Эту запись предоставил Kasetsart University