Table 3
Monthly variations by Fork length class (FL, mm) in sex ratio of Auxis thazard landed in Southeastern Brazil between March 2018 and February 2019. χ2 = chi-square test.
| Number | Frequency (%) | ||||||
|---|---|---|---|---|---|---|---|
|
|
|
||||||
| FL (mm) | F | M | F | M | χ2 | p-value | F:M |
| 265 | 2 | 2 | 50.0 | 50.0 | 0.00 | 1.00 | 1:1 |
| 275 | 3 | 8 | 27.3 | 72.7 | 20.66 | 0.00 | 0.4:1 |
| 285 | 12 | 10 | 54.5 | 45.5 | 0.83 | 0.36 | 1.2:1 |
| 295 | 23 | 18 | 56.1 | 43.9 | 1.49 | 0.22 | 1.3:1 |
| 305 | 48 | 29 | 62.3 | 37.7 | 6.09 | 0.01 | 1.7:1 |
| 315 | 38 | 29 | 56.7 | 43.3 | 1.80 | 0.18 | 1.3:1 |
| 325 | 50 | 60 | 45.5 | 54.5 | 0.83 | 0.36 | 0.8:1 |
| 335 | 54 | 49 | 52.4 | 47.6 | 0.24 | 0.63 | 1.1:1 |
| 345 | 28 | 30 | 48.3 | 51.7 | 0.12 | 0.73 | 0.9:1 |
| 355 | 14 | 16 | 46.7 | 53.3 | 0.44 | 0.50 | 0.9:1 |
| 365 | 5 | 10 | 33.3 | 66.7 | 11.11 | 0.00 | 0.5:1 |
| 375 | 6 | 2 | 75.0 | 25.0 | 25.00 | 0.00 | 3.0:1 |
| 385 | 2 | 1 | 66.7 | 33.3 | 11.11 | 0.00 | 2.0:1 |
| 395 | 6 | 6 | 50.0 | 50.0 | 0.00 | 1.00 | 1:1 |
| 405 | 5 | 3 | 62.5 | 37.5 | 6.25 | 0.01 | 1.7:1 |
| 415 | 8 | 7 | 53.3 | 46.7 | 0.44 | 0.50 | 1.1:1 |
| 425 | 8 | 8 | 50.0 | 50.0 | 0.00 | 1.00 | 1:1 |
| 435 | 4 | 7 | 36.4 | 63.6 | 7.44 | 0.01 | 0.6:1 |
| 445 | 2 | 4 | 33.3 | 66.7 | 11.11 | 0.00 | 0.5:1 |
| 455 | 0 | 0 | 0.0 | 0.0 | – | – | – |
| 465 | 0 | 0 | 0.0 | 0.0 | – | – | – |
| 475 | 2 | 0 | 100.0 | 0.0 | 100 | 0.00 | – |
| 485 | 1 | 1 | 50.0 | 50.0 | 0.00 | 1.00 | 1:1 |
| Mean | 321 | 300 | 51.7 | 48.3 | 0.11 | 0.74 | 1.1 |
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