I'll post any findings here and MFF though. Cheers buddy, BoutTime. Great post - hadn't heard of or noticed this problem yet - almost all of my largemouth are out of ponds and lakes. And yes, the spectre of endocrin disrupters is hanging heavily over the fishing community right now. Looks like we are the canaries in the next coal mine Thanks for the feedback RM, much appreciated. I was out the other day on Triadelphia and caught some decent largemouth and a few nice smallies too.
Some of the bass had the black spots, and one had them on both lips. I have pics, and will post them on the follow up once I get some info from the folks that I've emailed. I'd be suprised if there's a water quality problem in that watershed, at least that far up. But hey, maybe so. Blazer for testing. I fish below Harrisburg mostly, and I've seen some fish with these and with the open 'sores' as well.
I know this river is sick.. Of course, that means TMDL limits and monitoring, etc.. To the devil with the ecosystem, and the health of people who drink the water, breathe the air..
Wow, that really impressed me! I like your ideas. And the cartoon made it even better! Thanks for sharing your concept! Fatboy Bean Bag Chairs. I have been catching more of these fish lately and to me it seems as though I only catch them in waters that are known to be polluted.
I think there is a connection, probably not a dangerous one but I connection, I have yet to catch a bass with these spots in an area that I am not positive is polluted. That's good to know. It's hard for me to say in my area, but I'd bet that it's just about the same here too. I would say it's very likely in Maryland that there is some form of pollution in every body of water that holds bass. Sorry Dwayne for not responding sooner, but I hear you loud and clear. Hopefully people put people in power some day that will make a positive difference on the Susky.
Voters can make a difference. Maybe reading your's and Bill's comments will reach the right people some day. I just caught a Largemouth Bass about 30 mins ago that had these black blotches all over it Almost covered the entire top of the fish and the whole tail I took video of it and came back to look up what these blotches were.. This I can tell you about the pond it was caught in.. Extremely pollution free and unavailable to anglers, military protected water way by the air force so you can not stop and fish I caught the Bass in Dover, Delaware and from everyone I have asked so far they have not seen this before Has there been any head way on research done to figure out what the blotches are?
Like I said I have video and the blotches almost covered the entire Bass.. Thanks for the comment and question R. I need to do some research on this. I haven't heard much new other than from some discussions about the Susquehanna and it's problems. My opinion is that these spots are stress related somehow and are harmless as such. But, they could be indicators of a greater problem, such as pollution, but not necessarily in every case.
I will see what I can find out and try and post on the topic again. Hi all I have seen fish in the St. I am wondering if the cause is road salt. It is only been the past 10 years or so they have been using liquid salt on the roads We have ships bringing it in every day millions of tons sit along the shore line waiting to be trucked out. That is an interesting point about the salt. Since PA gets some pretty harsh winters, that might be something to look at. The more that I hear about the condition of the fishery, the more that I'm inclined to agree with Bill.
These spots may be harmless in some cases, but when they appear so often in places like the Susquehanna, it tells you those fish are stressed often. Pollution would be a likely suspect and these spots may indicate that problem. There are fish that have lesions and sores being caught more and more. Hopefully, more studies will lead to some potential solutions to this likely problem.
Update for those interested. A British researcher found similar black spots in coral trout and found that it represents melanoma, a skin cancer also seen in humans. Once they mature, the worms lay eggs which the bird passes into the water in its droppings. The eggs then hatch into microscopic organisms called miracidia that usually have only about 24 hours in which to swim around and find their next host that is typically a snail.
Once the miracidia worm their way into the snail, the parasite develops into its next life form, emerging from the snail as a tiny creature called a cercariae , that swims around in the water looking for a fish in which to infect. When the parasite successfully burrows into the northern pike, bass, walleye or other species the fish reacts by encrusting the little bugger in a cyst with black pigmented melanin, which is the black spot that we can see and feel.
I suspect the reason the northern pike that Marcel and KC caught are so heavily infected, is likely because they are large enough not to be easily targeted and eaten by too many birds.
I should mention, too, that the literature suggests that the parasites that cause black spot neither affect the fish they infect nor any humans that may eat them. To determine the exact cause, a tissue sample has to be observed under microscope. This could mean as the skin cells age, their ability to regulate melanin is decreased.
Or, it could be that the fish had visible black spots as a juvenile but was not observed by an angler. Genetically caused melanosis could explain why we see certain regions of the country experience this phenomenon in greater numbers. I see melanosis fish all the time in private lakes I manage, even with pristine water quality.
He has spent the last decade teaching lake owners how to raise trophy largemouth bass in various conditions.
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