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A summary of traits selected by three typical fishing gears and general shapes of the gear selectivity curves
| Traits selected by the gear | |||
|---|---|---|---|
| Gear | Selectivity curve* | Contact | Retention |
| Gillnet | Dome-shaped | Fast growth, boldness | Girth |
| Trawl | Logistic shape | Low swimming speed, slow escapement reaction | Girth |
| Longline | Logistic shape | High swimming speed, increased feeding motivation | Mouth size |
Typically characterized with a curve giving retention probability as a function of fish body length.
