Evidence of sampling induced biases in mortality estimates from experiments investigating mortality in fish escaping from towed fishing gears
Original version
This report is not to be cited without prior reference to the authorsAbstract
When studying escapes from trawl codends and other selective devices, the most common method of capturing or ‘sampling’ escaping fish is using a codend cover (Figure 1). This paper will summarise a programme of work providing evidence for two potential problems with codend covers, when sampling fish for use in survival experiments.