Table 1.
Mean and standard deviation of total body weight, body length and brain acetylcholinesterase activity in Dicentrarchus labrax, Platichthys flesus, and Mugil cephalus from the Douro estuary. Different letters indicate statistically significant differences (p ≤ 0.05) among seasons per species.
| N | Total body weight (g) | Total body length (cm) | AChE activity (nmol/min/mg protein) | |
|---|---|---|---|---|
| Dicentrarchus labrax | ||||
| Summer | 20 | 656 ± 89 a | 31 ± 4 a | 100 ± 24 a |
| Autumn | 20 | 625 ± 95 a | 35 ± 3 b | 165 ± 20 b |
| Winter | 20 | 532 ± 61 b | 36 ± 2 b | 151 ± 24 b |
| Total mean | 60 | 604 ± 97 | 34 ± 4 | 139 ± 36 |
| Comparison among seasons | 60 | H (2) = 21.000 p < 0.001 | H (2) = 20.643, p < 0.001 | F (2,57) = 46.017 p < 0.001 |
| Platichthys flesus | ||||
| Summer | 20 | 307 ± 30 a,b | 20 ± 2 a | 91 ± 29 a |
| Autumn | 20 | 337 ± 65 a | 30 ± 2 b | 96 ± 37 a |
| Winter | 20 | 290 ± 60 b | 29 ± 2 b | 51 ± 16 b |
| Total mean | 60 | 311 ± 56 | 26 ± 5 | 79 ± 35 |
| Comparison among seasons | 60 | H (2) = 41.721, p < 0.001 | F (2,57) = 4.024 p = 0.023 | F (2,57) = 25.181 p < 0.001 |
| Mugil cephalus | ||||
| Summer | 20 | 811 ± 74 a | 33 ± 4 a | 87 ± 13 a |
| Autumn | 20 | 1003 ± 511 a | 46 ± 3 b | 43 ± 17 b |
| Winter | 20 | 386 ± 78 b | 36 ± 2 a | 81 ± 25 a |
| Total mean | 60 | 733 ± 394 | 38 ± 7 | 71 ± 27 |
| Comparison among seasons | 60 | H (2) = 33.446 p < 0.001 | H (2) = 29.806 p < 0.001 | H (2) = 31.639 p < 0.001 |