Trotline hook selectivity for the Atlantic Bonito (Sarda sarda Bloch, 1793) fishery in the Çanakkale Strait (northern Aegean Sea, Turkey)
| 25 wrz 2020
O artykule
Article Category: Research Article
Data publikacji: 25 wrz 2020
Zakres stron: 281 - 290
Otrzymano: 02 gru 2019
Przyjęty: 25 lut 2020
DOI: https://doi.org/10.1515/ohs-2020-0025
© 2020 Faculty of Oceanography and Geography, University of Gdańsk, Poland
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
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Estimates of the SELECT model parameters for hook selectivity for Atlantic bonito (Sarda sarda Bloch, 1793)
| Material | Model | Parameters | Modal deviance | Degree of freedom (df) | |
|---|---|---|---|---|---|
| Steel | Normal location | (k; σ) = (25.911; 3.364) | 69.018 | 0.000239 | 33 |
| Normal scale | (k1; k2) = (26.374; 2.772) | 75.938 | 0.000031 | 33 | |
| Lognormal | (μ1; σ) = (3.391; 0.102) | 69.764 | 0.000193 | 33 | |
| Gamma | (k; α) = (0.277; 95.37) | 71.709 | 0.00011 | 33 | |
| Bi-modal | (k1, k2, k3, k4, w) = (25.726; 2.082; 33.776; 1.046; 0.248) | 58.875 | 0.001257 | 30 | |
| Tin | Normal location | (k; σ) = (27.487; 4.344) | 65.077 | 0.000007 | 23 |
| Normal scale | (k1; k2) = (27.784; 3.081) | 60.864 | 0.000029 | 23 | |
| Lognormal | (μ1; σ) = (3.435; 0.123) | 60.705 | 0.00003 | 23 | |
| Gamma | (k; α) = (0.392; 71.688) | 60.739 | 0.00003 | 23 | |
| Bi-modal | - | - | - | - | |
| Nickel | Normal location | - | - | - | - |
| Normal scale | (k1; k2) = (25.535; 2.816) | 39.536 | 0.00091 | 16 | |
| Lognormal | (μ1; σ) = (3.489; 0.124) | 40.48 | 0.000662 | 16 | |
| Gamma | (k; α) = (0.359; 71.877) | 40.123 | 0.000747 | 16 | |
| Bi-modal | - | - | - | - |
Modal lengths and distribution values for Atlantic bonito (Sarda sarda Bloch, 1793) for each hook size
| Material | Hook size | Gap (mean) |
Model length |
Distribution value |
Model |
|---|---|---|---|---|---|
| Steel | 1/0 | 1.13 | 29.14 | 2.35 | Bi-modal |
| 2/0 | 1.34 | 34.42 | 2.78 | ||
| 3/0 | 1.43 | 36.74 | 2.97 | ||
| 4/0 | 1.47 | 37.90 | 3.06 | ||
| Tin | 1/0 | 1.10 | 19.08 | 2.11 | Lognormal |
| 2/0 | 1.22 | 23.10 | 2.56 | ||
| 3/0 | 1.38 | 23.92 | 2.65 | ||
| 4/0 | 1.49 | 30.46 | 3.37 | ||
| Nickel | 1/0 | 1.27 | 13.64 | 1.53 | Normal scale |
| 2/0 | 1.36 | 16.51 | 1.86 | ||
| 3/0 | 1.45 | 17.10 | 1.92 | ||
| 4/0 | 1.66 | 21.77 | 2.45 |
The number and length values of Atlantic bonito (Sarda sarda Bloch, 1793) in relation to hook sizes
| Material | Hook size | N | Total length (cm) | ||
|---|---|---|---|---|---|
| Minimum | Maximum | Mean ± SE | |||
| Steel | 1/0 | 73 | 27.5 | 39.5 | 30.42 ± 0.16 |
| 2/0 | 51 | 30 | 38.6 | 31.34 ± 0.18 | |
| 3/0 | 35 | 30 | 38.7 | 31.80 ± 0.20 | |
| 4/0 | 42 | 30.4 | 44.6 | 37.86 ± 0.22 | |
| Tin | 1/0 | 100 | 25.6 | 33.9 | 30.21 ± 0.14 |
| 2/0 | 44 | 28.8 | 33.9 | 30.88 ± 0.19 | |
| 3/0 | 31 | 30.3 | 34.4 | 31.56 ± 0.24 | |
| 4/0 | 19 | 30.9 | 37 | 32.79 ± 0.16 | |
| Nickel | 1/0 | 63 | 28.4 | 31 | 29.96 ± 0.17 |
| 2/0 | 50 | 29.7 | 38.5 | 31.30 ± 0.28 | |
| 3/0 | 37 | 30.1 | 40 | 33.42 ± 0.21 | |
| 4/0 | 8 | 30.3 | 33.5 | 31.25 ± 0.24 | |
| Carbon | 1/0 | 19 | 28.7 | 31.6 | 29.90 ± 0.13 |
| 2/0 | 20 | 30 | 33.2 | 30.52 ± 0.19 | |
| 3/0 | 6 | 30.3 | 33.4 | 31.33 ± 0.33 | |
| 4/0 | 6 | 30.3 | 32.3 | 30.95 ± 0.20 | |