I am involved in a project focused on understanding, through underwater footage in bottom trawling, the efficacy of selection grids and gaining basic information on the behaviour of fish/shrimps towards them. Hauls will be performed at depths ranging from 100 to 200 m.
In my institute, we have always worked with GoPros and deepwater housings associated with lights (see the images attached), but sometimes, especially in dark and/or high turbidity environment, the footages are not usable.
Do you have any alternative or advice on the best solution to obtain useful footages during trawl hauls to monitor escapees from selection devices and some behaviour information?
We use these devices on commercial vessels, so we need easy-handling equipment.
Andrea Petetta, CNR IRBIM