To start off, my fishing is at max skill (375)
I use Nat Pagle's pole (+25), and typically use the baubles (+75), so for the following results you can assume my fishing skill is 475.
I did a trial of 10 minutes each in three different locations:
1. The body of water outside Shat.
Golden Darter: 6
Spotted Feltail: 6
Remaining catches: Barbed Gill Trout
2. Body of water beside Stonebreaker Hold.
Golden Darter: 7
Spotted Feltail: 2
Remaining catches: Barbed Gill Trout, Inscibed Scrollcase
3. Body of water in Skettis.*
Golden Darter: 9
Spotted Feltail: 6
Remaining catches: Barbed Gill Trout (quite a few less of these than the other two locations)
*Note: I had a few more "your fish got away" messages here, whereas at the other two locations almost every catch was successful.
My conclusion: the quality of fish are better up in Skettis, but not worth the time unless you have a very high fishing skill, as more will get away than will be successful.
Hope this helps everyone out there searching for some fish sticks :)
Good luck!
(These trials were done between 6 - 6:30 pm server time)