I cannot recall ever seeing this in an “eye” on the river, but the sauger sure can get twisted up. I have seen larger sauger bent up like this, but one person asked if larger fish suffer from this problem and I think that as the afflicted fish grow their food size needs increase and they simply cannot function well enough to eat right and die.
I’ve heard genetics, I’ve heard pollution, I’ve heard crossing with walleyes….who knows, but I have seen this occuring in sauger on pools 4, 5 and 5A for as long as I have fished the river and I started that in 1960 at the age of ten. I think its genetics. I don’t think the problem is any worse but rather that more people are fishing the big river today than ever before and do so successfully so weird catches like this get more notice.
A number of years ago I sat in on an informal discussion with the fisheries personel at Lake City and this mutation thing entered the talks. The guys there did not seem too concerned about it and if memory serves me well it was said that genetics were to blame and that with as many sauger as the river has hatching when the years are good this will happen at a higher rate of incidence.