Prawns Depths and Times

[flat lander transplant]

Prawns are sensitive to dissolved oxygen levels, hence when you start getting more squat lobster, who are not as sensitive to lower dissolved oxygen levels your too deep. So if your fishing an area not prone to a fair bit of current it is possible to see an shift in the DO at various depths with the season and thus an avoidance migration of the prawns. Or so I read in a scientific study ....

Great info on the DO levels! I was wondering about the rational on that. I did test my theory and moved my traps shallower for winter trapping and started getting prawns at about 180' rather than the normal 300' for that spot. However I don't think that DO levels are driving them up. Levels rise during the winter which would in theory allow them to go deeper. Might also be egg laying migration as well as sunlight hours?