| 
      
        | Exposed salinity (ppt) | Cumulative mortality (%) (Exposure time in hours) | Survival (%) |  
        | 1h | 24h | 48h | 72h | 96h |  
        | 0 | 0 | 0 | 0 | 0 | 0 | 100a |  
        | 2 | 0 | 5 | 0 | 0 | 0 | 95b |  
        | 4 | 0 | 10 | 10 | 5 | 0 | 75c |  
        | 6 | 0 | 15 | 15 | 10 | 0 | 60d |  
        | 8 | 10 | 20 | 20 | 15 | 15 | 20e |  
        | 10 | 25 | 30 | 30 | 10 | 5 | 0f |  
        | Superscripts like a,    b, c… in same columns were    significantly different (P < 0.01) in Tukey’s HSD mean separation test |  |