|  | Cobia | Grouper | Asian seabass | 
      
        |  | North | South | North | Central | Central | South | 
      
        |  | 2010 | 2013 | 2010 | 2013 | 2010 | 2013 | 2010 | 2013 | 2010 | 2013 | 2010 | 2013 | 2010 | 2013 | 
      
        | Cage    or pond | cage | cage | pond | pond | cage | pond | 
      
        | Aerator    (% of hhds) | 0 | 0 | 100 | 0 | 0 | 0 | 0 | 0 | 25 | 0 | 25 | 0 | 63 | 58 | 
      
        | -    Number | - | - | 1.0 | - | - | - | - | - | 2.0 | - | 2.0 | - | 1.2 | 2.5 | 
      
        | -    Annual replacement cost (USD/yr)a | - | - | 32 | - | - | - | - | - | 130 | - | 0.50 | - | 0.44 | 25 | 
      
        | Boats    (% of hhds) | 46 | 50 | 100 | 88 | 23 | 65 | 63 | 0 | 13 | 15 | 0 | 35 | 88 | 37 | 
      
        | -    Number | 1.9 | 1.0 | 1.4 | 1.1 | 2.1 | 1.0 | 1.0 | - | 1.0 | 1.0 | - | 1.0 | 1.0 | 1.6 | 
      
        | -    Annual replacement cost (USD/yr) | 1,200 | 56 | 72 | 43 | 960 | 55 | 6.7 | - | 42 | 6.7 | - | 14 | 26 | 33 | 
      
        | Frame  (% of hhds) | 0 | 0 | 46 | 0 | 0 | 0 | 0 | 0 | 88 | 0 | 50 | 75 | 75 | 0 | 
      
        | -    Number | - | - | 6.0 | - | - | - | - | - | 3.1 | - | 2.0 | 1.7 | 3.7 | - | 
      
        | -    Annual replacement cost (USD/yr) | - | - | 35 | - | - | - | - | - | 31 | - | 14 | 7.0 | 0.74 | - | 
      
        | Light  (% of hhds) | 0 | 95 | 100 | 80 | 14 | 95 | 100 | 59 | 38 | 62 | 25 | 5.0 | 88 | 58 | 
      
        | -    Number | - | 2.2 | 3.6 | 8.6 | 2.3 | 22 | 2.0 | 1.9 | 4.7 | 1.4 | 2.0 | 2.0 | 3.3 | 4.5 | 
      
        | -    Annual replacement cost (USD/yr) | - | 3.9 | 11 | 2.2 | 17 | 8.0 | 5.2 | 15 | 15 | 15 | 0.10 | 2.0 | 0.067 | 8.3 | 
      
        | Nets    (% of hhds) | 0 | 100 | 31 | 56 | 0 | 100 | 25 | 63 | 0 | 0 | 0 | 10 | 0 | 53 | 
      
        | -    Number | - | 8.5 | 1 | 4.9 | - | 4.7 | 1.0 | 6.5 | - | - | - | 1.0 | - | 1.2 | 
      
        | -    Annual replacement cost (USD/yr) | - | 2.6 | 17 | 38 | - | 2.7 | 30 | 66 | - | - | - | 24 | - | 42 | 
      
        | Pump  (% of hhds) | 0 | 0 | 100 | 48 | 0 | 0 | 0 | 0 | 75 | 68 | 25 | 25 | 88 | 100 | 
      
        | -    Number | - | - | 1.0 | 1.30 | - | - | - | - | 1.8 | 1.2 | 1.0 | 1.0 | 1.0 | 1.4 | 
      
        | -    Annual replacement cost (USD/yr) | - | - | 61 | 63 | - | - | - | - | 120 | 46 | 2.5 | 58 | 1.1 | 63 | 
      
        | Tool  (% of hhds) | 0 | 0 | 38 | 40 | 0 | 0 | 0 | 11 | 0 | 53 | 0 | 60 | 0 | 0 | 
      
        | -    Number | - | - | n.a. | n.a. | - | - | - | n.a. | - | n.a. | - | - | - | - | 
      
        | -    Annual replacement cost (USD/yr) | - | - | 20 | 5.5 | - | - | - | 36 | - | 55 | - | 13 | - | - | 
      
        | Paddle–wheel    (% of hhds) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 75 | 85 | 100 | 100 | 0 | 100 | 
      
        | -    Number | - | - | - | - | - | - | - | - | 1.8 | 2.0 | 2.0 | 3.1 | - | 3 | 
      
        | -    Annual replacement cost (USD/yr) | - | - | - | - | - | - | - | - | 120 | 67 | 120 | 80 | - | 42 |