BACTERIA SPECIES COMPOSITION AND WATER QUALITY STATUS  IN HARD CLAM (Meretrix meretrix) FARMING AREAS  IN THAI BINH AND THANH HOA

Phan Trọng Bình; Nguyễn Hữu Nghĩa; Phạm Thái Giang; Trương Thị Mỹ Hạnh; Nguyễn Đức Bình; Nguyễn Minh Quân; Nguyễn Thị Hạnh; Lê Thị Mây; Nguyễn Thị Nguyện

doi:10.34238/tnu-jst.7526

BACTERIA SPECIES COMPOSITION AND WATER QUALITY STATUS IN HARD CLAM (Meretrix meretrix) FARMING AREAS IN THAI BINH AND THANH HOA

About this article

Received: 14/03/23 Revised: 05/06/23 Published: 08/06/23

Authors

1. Phan Trong Binh , Centrer for Environment and Disease Monitoring in Aquaculture - Research Institute for Aquaculture No.1 (RIA1)
2. Nguyen Huu Nghia, Centrer for Environment and Disease Monitoring in Aquaculture - Research Institute for Aquaculture No.1 (RIA1)
3. Pham Thai Giang, Centrer for Environment and Disease Monitoring in Aquaculture - Research Institute for Aquaculture No.1 (RIA1)
4. Truong Thi My Hanh, Centrer for Environment and Disease Monitoring in Aquaculture - Research Institute for Aquaculture No.1 (RIA1)
5. Nguyen Duc Binh, Centrer for Environment and Disease Monitoring in Aquaculture - Research Institute for Aquaculture No.1 (RIA1)
6. Nguyen Minh Quan, Centrer for Environment and Disease Monitoring in Aquaculture - Research Institute for Aquaculture No.1 (RIA1)
7. Nguyen Thi Hanh, Centrer for Environment and Disease Monitoring in Aquaculture - Research Institute for Aquaculture No.1 (RIA1)
8. Le Thi May, Centrer for Environment and Disease Monitoring in Aquaculture - Research Institute for Aquaculture No.1 (RIA1)
9. Nguyen Thi Nguyen, Centrer for Environment and Disease Monitoring in Aquaculture - Research Institute for Aquaculture No.1 (RIA1)

Abstract

The study aims to assess the status of environmental water indicators and disease agents in the hard clam (Meretrix meretrix) farming area in the provinces of Thai Binh and Thanh Hoa. Environmental water indicators such as temperature, pH, salinity, alkalinity, NH₄⁺, NO₂^-, S²^-, total Vibrio in water and bacteria in hard clams were analyzed from April to October in the period of 2017-2021. The result indicated that the salinity and alkalinity decreased while NH₄⁺ increased from August to October. The concentration of NO₂^-and total Vibrio density increased from April to July. Two bacterial genus including Vibrio spp. and Aeromonas spp. were isolated from hard clams. Of these, Vibrio parahaemolyticus, V. alginolyticus, and V. vulnificus accounted for 35.81, 18.60, and 14.88%, respectively. High Vibrio density in water increases the risk of Vibrio spp. bacterial infection in hard clams. The factors that affected the growth rate and productivity of hard clams in Thai Binh and Thanh Hoa were alkalinity, salinity, NH₄⁺, NO₂^-, total Vibrio, and Vibrio spp.

Keywords

Water quality; Thai Binh; Thanh Hoa; Bacteria species composition; Meretrix meretrix

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DOI: https://doi.org/10.34238/tnu-jst.7526

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