Logperch of Wisconsin and Illinois
Posted 23 May 2013 - 11:02 PM
I haven't read any research papers related to new species and subspecies of logperch, so I apologize in advance if I'm not up to date on the latest classifications. If anyone would like to point me to good papers, I'd be happy to read them. In the meantime though, I want to share some photos of logperch I've caught and hopefully learn some of the ID characteristics of the various species / subspecies / intergrades present in Wisconsin and Illinois.
Wisconsin River, Prairie du Sac dam, WI
Yahara River, downtown Madison, WI - apologies for the bad photo, it's an old one
Mukwonago River, Mukwonago, WI
Illinois River tributary north of Peoria, IL
creek to remain unnamed near Wolf Lake, IL
Any help, insight, or general discussion would be greatly appreciated. Thanks!
Posted 24 May 2013 - 12:45 AM
Posted 24 May 2013 - 07:39 AM
Posted 24 May 2013 - 05:49 PM
Edited by BenCantrell, 24 May 2013 - 06:09 PM.
Posted 26 May 2013 - 08:26 PM
Do these look like unscaled napes?
Posted 26 May 2013 - 08:53 PM
The nape is the dorsal surface between the posterior edge of the skull and the dorsal fin insertion. I would consider all of those napes as fully-scaled.
In terms of taxonomy, nothing new has come up since the discussion between Todd and Nathan that you posted (as far as I know). A comprehensive study of P. caprodes is badly wanting, but that will be quite a Herculean task. For now, I wouldn't put much stock into the subspecies designations and the subspecies rank in general hasn't gained much traction among Etheostomatine specialists.
Thanks for posting the photos, though -- always good to document the variation!
Posted 26 May 2013 - 09:09 PM
Here's a side view of today's Mukwonago, WI logperch. Quite interesting patterns, especially towards the rear of the fish.
Posted 27 May 2013 - 01:53 AM
Yes, interesting pattern on your most recent P. caprodes. Try to capture photos of the mouth closed, at least the anterior dorsal fin flared, and pelvic fins held against the body. If you can't get all of these in one shot such as in a phototank, get them by taking multiple shots of each individual in hand. Dorsal pattern and scalation of nape (as you know) photos are important as well. If you cover these bases, we can stretch out our necks and chuck around ideas.
Glad to see your interest in photographing logperch variation. I've never sampled Wisconsin, but I appreciate seeing the photos (even if it isn't as fun as in the flesh). I've thought about doing something similar for E. spectabile here in Illinois.
Posted 27 May 2013 - 11:27 AM
Posted 25 September 2020 - 03:28 PM
My son is catching these today in lake Butte de Morts.
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