Table 2.
Respondent and production characteristics of studied farm groups (values expressed as mean±SD excluding percentages which are expressed as mean values).
| Characteristics |
Studied farm group |
|||
|---|---|---|---|---|
| SP | SPP | PP | Overall | |
| Respondent age (years) | 42±11ab | 40±11b | 44±11a | 42±11 |
| Schooling years (years) | 6.2±3.9a | 7.6±3.1b | 5.9±3.9a | 6.6±3.7 |
| Aquaculture experience (years) | 16±8.0a | 14±6.8a | 15±6.5a | 15±7.1 |
| Attended aquaculture education program (%) | 66 | 47 | 48 | 54 |
| Total farm area (ha) | 1.2±1.1a | 0.55±0.35b | 0.45±0.32b | 0.75±1.1 |
| Farm surface water area (ha) | 1.1±1.0a | 0.46±0.25b | 0.39±0.28b | 0.66±1.0 |
| Gher water depth (m) | 0.81±0.15a | 0.92±0.19b | 0.97±0.26b | 0.90±0.21 |
| Crop duration (days per year) | 299±17a | 283±31b | 264±33c | 283±31 |
| Stocking density of shrimp/prawn (no./m2) | 11±6.1a | 7.9±4.0b | 1.8±1.0c | 7.0±5.6 |
| Stocking density of fish (no./m2) | 1.0±1.5a | 0.15±0.20b | 0.10±0.10b | 0.42±0.95 |
| Shrimp and prawn production (kg/ha) | 376±185a | 627±326b | 416±278a | 480±293 |
| Fish production (kg/ha) | 753±856a | 862±528a | 800±552a | 807±662 |
| Main water source (%) | ||||
| Surface water | 100 | 72 | 2.6 | 61 |
| Rainfall | 0.00 | 28 | 97 | 39 |
| Water exchange (% farm exchanging water) | 28 | 43 | 11 | 29 |
| Water exchange frequency (times/ production cycle) | 5.6±4.9a | 4.9±3.4a | 1.6±0.9b | 4.6±3.9 |
| Volume of water exchange (% of total water in gher) | 43±20a | 26±14b | 12±10c | 29±19 |
Mean values followed by different superscript letters indicate significant differences as result of the Bonferroni test (P≤0.05).