การติดตามตรวจสอบคุณภาพน้ำและการแพร่กระจายของเชื้อ Vibrio spp. บริเวณอ่าวบ้านดอน อำเภอกาญจนดิษฐ์ จังหวัดสุราษฎร์ธานี

Abstract

The monitoring of water quality and distribution of Vibrio spp. study was conducted at Bandon bay, Kanjanadit District, Suratthani Province. Physical, chemical and biological characteristics of water were monitored during a year of 2015 2016 comparing between dry season (April, June, February) and rainy season (August, October, December). The sample were collected from three different locations: coastal area, oyster and cockle farming area, and non-farming area. The findings showed that the distribution of Vibrio spp. in dry season was higher than rainy season with the average concentration of the collected samples at 64.75 and 18.88 CFU/ml, respectively. The associations between Vibrio spp. and a water quality indicator was analyzed by using Pearson correlation. In dry season at the coastal area, it was found that the concentration of Vibrio spp. was negatively correlated with pH (r = -0.998, p <0.05), which means if pH values increased, the number of Vibrio spp. would decrease. Furthermore, Vibrio spp. was negatively correlated with ammonia-nitrogen (r=-0.999, p<0.05). However, Vibrio spp. was positively correlated with coliform bacteria (r = 0.998, p<0.05). It is noted that transparency was positively correlated with Vibrio spp. in both dry and rainy seasons (r= 1.0, p<0.01). The results showed that the water quality can be classified in the marine water quality standard class 3 (marine water quality for aquaculture).