Table 3.
Summary of the dataset by different management variables of shrimp farming practices, and by zone.
| Variables category | Variables | Variables type | Variables narration | LSZ1 (Khulna) | ISZ2 (Bagerhat) | HSZ3 (Satkhira) |
|---|---|---|---|---|---|---|
| Average/Frequency | ||||||
| Management variables (Site/farm management) | Farm operated by owner | BV⁎⁎⁎ | No: 0 | 26 | 5 | 5 |
| Yes: 1 | 124 | 21 | 52 | |||
| Use of fertilizer | NV⁎ | No: 4 | 59 | 9 | 8 | |
| Inorganic: 3 | 62 | 9 | 41 | |||
| Organic: 2 | 10 | 8 | 1 | |||
| Mixed – inorganic and organic: 1 | 19 | 0 | 7 | |||
| Chemicals use (pond preparation) | NV | Chemical treatments: 3 | 24 | 7 | 7 | |
| Therapeutic treatments: 1 | 126 | 19 | 50 | |||
| Chemicals use (water treatment) | NV | Chemical treatments: 3 | 60 | 11 | 11 | |
| Therapeutic treatments: 1 | 90 | 15 | 46 | |||
| Use of aerator | BV | No: 0 | 132 | 22 | 56 | |
| Yes: 1 | 18 | 4 | 1 | |||
| Gher drying after harvest | BV | No: 0 | 6 | 1 | 0 | |
| Yes: 1 | 144 | 25 | 57 | |||
| Sludge removal method | NV | No: 5 | 18 | 3 | 13 | |
| Flushing, deposit sludge on farm: 3 | 62 | 9 | 24 | |||
| Flushing, deposit sludge on and off farm: 2 | 48 | 7 | 17 | |||
| Flushing, deposit sludge off farm: 1 | 22 | 7 | 3 | |||
| Sludge removal interval | NV | Never: 1 | 18 | 3 | 13 | |
| 1 year: 2 | 102 | 17 | 39 | |||
| ≥2 year: 3 | 30 | 6 | 5 | |||
| Management variables (Site/farm management) | Maintain and repair dikes | NV | No repaired dikes or repair with the pond bottom soil of other farms: 4 | 7 | 1 | 1 |
| Repaired dikes with the pond bottom soil of farm itself: 2 | 134 | 23 | 56 | |||
| Repaired dikes with the soil from fallow land: 1 | 9 | 2 | 0 | |||
| Period of fallow | CV⁎⁎ | Continuous variable | 55.56 | 57.3 | 45 | |
| Management variables (Water management) | Water source (direct natural) | NV | Rain water: 3 | 6 | 1 | 0 |
| Boring water: 2 | 21 | 0 | 3 | |||
| Direct from sea or river/tidal flow: 1 | 56 | 11 | 10 | |||
| If not direct natural: 0 | 67 | 14 | 44 | |||
| Water source (indirect natural) | NV | Water coming via other shrimp farms: 4 | 28 | 9 | 10 | |
| Canal from sea/river: 2 | 20 | 3 | 34 | |||
| Treated water: 1 | 19 | 2 | 0 | |||
| If not indirect natural: 0 | 83 | 12 | 13 | |||
| Water coming via other farms | BV | No: 0 | 122 | 17 | 47 | |
| Yes: 1 | 28 | 9 | 10 | |||
| Reservoir | BV | No: 0 | 135 | 25 | 57 | |
| Yes: 1 | 15 | 1 | 0 | |||
| Frequency of water exchange | NV | ≤ 7 – 28 days: 4 | 43 | 17 | 26 | |
| 29 – 42 days: 3 | 49 | 3 | 7 | |||
| > 42 days: 2 | 14 | 1 | 6 | |||
| No exchange: 1 | 44 | 5 | 18 | |||
| Same passes for inlet/outlet | BV | No: 0 | 65 | 8 | 7 | |
| Yes: 1 | 85 | 18 | 50 | |||
| Management variables (Culture management) | Culture method | NV | Monoculture: 4 | 20 | 4 | 1 |
| Polyculture (shrimp with prawn): 3 | 34 | 10 | 6 | |||
| Polyculture (shrimp with fish): 1 | 96 | 12 | 50 | |||
| Source of PL | NV | Mixed source or non-registered private hatchery: 3 | 19 | 1 | 7 | |
| Registered private hatchery: 2 | 99 | 17 | 48 | |||
| Wild: 1 | 32 | 8 | 2 | |||
| Stocking density | CV | Continuous variable | 229.7 | 208.7 | 257.1 | |
| Stocking age | CV | Continuous variable | 13.8 | 22.9 | 16 | |
| Quality of PL | NV | Low: 3 | 9 | 2 | 1 | |
| Medium: 2 | 115 | 23 | 56 | |||
| High: 1 | 26 | 1 | 0 | |||
| Crop rotation | BV | No: 0 | 82 | 11 | 26 | |
| Yes: 1 | 68 | 15 | 31 | |||
| Management variables (Feed management) | Types of feed use | NV | Live food: 5 | 12 | 1 | 20 |
| Homemade pellet feed: 4 | 25 | 9 | 7 | |||
| Mixed use of homemade and commercial pellet feed: 3 | 40 | 12 | 8 | |||
| Formulated commercial pellet feed: 2 | 50 | 4 | 3 | |||
| No: 1 | 23 | 0 | 19 | |||
| Use of feed additives | BV | No: 0 | 94 | 6 | 43 | |
| Yes: 1 | 56 | 20 | 14 | |||
| Management variables (Biosecurity management) | Bird scare net | BV | No: 0 | 57 | 25 | 57 |
| Yes: 1 | 0 | 1 | 0 | |||
| Crab fence | BV | No: 0 | 57 | 24 | 57 | |
| Yes: 1 | 0 | 2 | 0 | |||
| Footbath | BV | No: 0 | 57 | 24 | 57 | |
| Yes: 1 | 0 | 2 | 0 | |||
| Limited access | BV | No: 0 | 54 | 23 | 54 | |
| Yes: 1 | 3 | 3 | 3 | |||
| Same equipment for the whole farm | BV | No: 0 | 0 | 2 | 0 | |
| Yes: 1 | 57 | 24 | 57 | |||
1
LSZ: Low Saline Zone.
2
ISZ: Intermediate Saline Zone.
3
HSZ: High Saline Zone.
⁎
NV: Nominal Variable.
⁎⁎
CV: Continuous Variable.
⁎⁎⁎
BV: Binary Variable.