When does hardhead bite slow down?

[MathGeek]

When in the fall does the hardhead bite slow down?

We need to schedule a study when hardheads are very easy to catch, and we're trying to squeeze it in this year before the bite slows in the fall.

If you're wondering, "What the heck?" We did a study earlier this summer showing that magnetic hooks can decrease the catch rate of hardhead catfish. These results hinted that the outcome depends on whether or not there is moving water, so we have designed a follow-up study where moving water is an explicit experimental variable.