Table 2
Total number of crayfish in codend (retained) and cover (escapees) and their seasonal length distributions
| Spring | Summer | Autumn | Winter | p** | Total | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Codend | N | TL Mean ± SE | N | TL Mean ± SE | N | TL Mean ± SE | N | TL Mean ± SE | TL | N | TL Mean ± SE | |
| Com34 | Codend | 35 | x91.5 ± 3.0a | 46 | x96.1 ± 1.3a | 34 | y111.0 ± 2.2a | 50 | y106.9 ± 1.3a | 0.000 | 165 | 101.5 ± 1.1a |
| Cover | 60 | x77.1 ± 1.7 | 64 | y86.6 ± 1.6 | 12 | yz92.7 ± 5.0 | 26 | z98.4 ± 1.8 | 0.000 | 162 | 85.4 ± 1.2 | |
| p | 0.000 | 0.000 | 0.004 | 0.000 | 0.000 | |||||||
| Total | 95 | x82.4 ± 1.7 | 110 | y90.59 ± 1.15 | 46 | z106.19 ± 2.38 | 76 | z104.0 ± 1.2 | 0.000 | 327 | 93.52 ± 0.91 | |
| SG20 | Codend | 23 | x103.0 ± 4.8a | 11 | xy107.8 ± 1.3bc | 22 | z120.8 ± 1.9bc | 43 | yz116.4 ± 1.4b | 0.000 | 99 | 113.3 ± 1.5bc |
| Cover | 53 | x81.0 ± 1.7 | 81 | y94.2 ± 0.9 | 56 | z105.9 ± 1.6 | 84 | z104.1 ± 1.0 | 0.000 | 274 | 97.1 ± 0.8 | |
| p | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | |||||||
| Total | 76 | x87.7 ± 2.2 | 92 | y95.8 ± 1.0 | 78 | z110.1 ± 1.5 | 127 | z108.3 ± 1.0 | 0.000 | 373 | 101.4 ± 0.8 | |
| SG25 | Codend | 6 | z128.4 ± 7.4b | 4 | x105.7 ± 3.5abc | 23 | yz122.8 ± 1.7c | 20 | xy114.8 ± 2.0ab | 0.001 | 53 | 119.1 ± 1.6cd |
| Cover | 29 | x81.8 ± 1.7 | 83 | y96.6 ± 0.8 | 55 | z106.3 ± 1.4 | 95 | z102.9 ± 0. 9 | 0.000 | 262 | 99.3 ± 0.7 | |
| p | 0.001 | 0.018 | 0.000 | 0.000 | 0.000 | |||||||
| Total | 35 | x89.8 ± 3.5 | 87 | y97.0 ± 0.8 | 78 | z111.1 ± 1.4 | 115 | z105.0 ± 0.9d | 0.000 | 315 | 102.6 ± 0.8 | |
| Codend | 11 | 130.8 ± 4.9b | 0 | – | 12 | 123.5 ± 2.0c | 18 | 125.7 ± 1.5c | 0.225 | 41 | 126. 5 ± 1.6d | |
| Cover | 63 | x82.4 ± 1.4 | 45 | y96.8 ± 1.1 | 54 | z109.0 ± 1.4 | 72 | z106.0 ± 1.2 | 0.000 | 234 | 98.6 ± 0.9 | |
| SG30 | p | 0.000 | - | 0.000 | 0.000 | 0.000 | ||||||
| Total | 74 | x89.6 ± 2.4 | 45 | y96.8 ± 1.1 | 66 | z111.6 ± 1.4 | 90 | z109.9 ± 1.3 | 0.000 | 275 | 102.7 ± 1.0 | |
| SRN34 | Codend | 64 | x92.9 ± 2.6a | 8 | x97.4 ± 2.3ab | 29 | y112.8 ± 1.4ab | 41 | y115.4 ± 1.8b | 0.000 | 142 | 103.7 ± 1.6a |
| Cover | 129 | x80.5 ± 0.8 | 95 | y89.4 ± 0.9 | 39 | z101.9 ± 2.1 | 56 | z103.5 ± 1.1 | 0.000 | 319 | 89.8 ± 0.8 | |
| p | 0.000 | 0.017 | 0.000 | 0.000 | 0.000 | |||||||
| Total | 193 | x84.6 ± 1.1 | 103 | y90.0 ± 0.9 | 68 | z106.6 ± 1.5 | 97 | z108.5 ± 1.2 | 0.000 | 461 | 94.1 ± 0.8 | |
| SRN42 | Codend | 52 | x97.5 ± 2.8a | 15 | x105.20 ± 1.8abc | 23 | y118.5 ± 1.8abc | 29 | y117.6 ± 2.0b | 0.000 | 119 | 107.4 ± 1.6ab |
| Cover | 297 | x76.6 ± 0.7 | 90 | y88.9 ± 1.1 | 59 | z106.1 ± 1.3 | 96 | z102.9 ± 1.0 | 0.000 | 542 | 86.5 ± 0.7 | |
| p | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | |||||||
| Total | 349 | x79.75 ± 0.81 | 105 | y91.26 ± 1.09 | 82 | z109.60 ± 1.21 | 125 | z106.3 ± 1.1 | 0.000 | 661 | 90.3 ± 0.7 | |
| SRN50 | Codend | 8 | y130.7 ± 6.2b | 7 | x111.3 ± 1.1c | 18 | xy123.1 ± 1.9c | 16 | xy121.7 ± 2.5bc | 0.000 | 49 | 122.2 ± 1.6d |
| Cover | 166 | x79.0 ± 0.9 | 55 | y94.6 ± 1.5 | 52 | z106.8 ± 1.4 | 57 | z105.0 ± 1.1 | 0.000 | 330 | 90.5 ± 1.0 | |
| p | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | |||||||
| Total | 174 | x81.4 ± 1.2 | 62 | y96.5 ± 1.5 | 70 | z111.0 ± 1.4 | 73 | z108.7 ± 1.3 | 0.000 | 379 | 94.6 ± 1.0 | |
| p* | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | |||||||
p: probability value of t-test for TL comparing of cover & codend for same experimental gear. p*: probability value of ANOVA for TL comparing of experimental codends, differences of groups marked with a, b, c letters (in column). p**: probability value of ANOVA for TL comparing of the season for same codend & cover, differences of groups marked with x, y, z letters (in rows). TL: total length (mm).
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