The mean abundance of Vibrio bacteria in the near shore waters of Visakhapatnam coast was slightly higher before Hudhud cyclone (4 to1.53x10³ cfu/ml) than after Hudhud cyclone (3 to 1.32x10³ cfu/ml). Stations 6, 1,10 and 7 recorded high values of Total Vibrio Count (TVC) before the cyclone. Stations 20(1.37x10³ cfu/ml) and 25 (1.32x10³ cfu/ml) showed high values of TVC after the cyclone. The observed temperature, salinity, dissolved oxygen and pH of surface seawater did not show marked fluctuations before and after cyclone. Vibrio bacteria density data indicate the negative impact of Hudhud cyclone on Vibrio bacteria of near shore waters. Salinity showed insignificant negative correlations before and after cyclone. Temperature and pH revealed insignificant positive correlations before and after cyclone.

Vibrio bacteria, near shore waters, Hudhud cyclone, Visakhapatnam coast