If it didn't matter, why did you ask?
"If huge spearing numbers of walleye in the mid 80's didn't directly result to the smallmouth comeback, what is the explanation?"
I gave you one that works very well. And it's no more speculative than guessing at how many walleyes were killed during the first few years of treaty harvest. But I'm pretty sure tribal harvest never took 21,000 walleyes out of the TFF in a single season.
People also like to claim that spearing had a disproportionate effect on large walleyes, but the numbers don't completely back that up either. In 1975, 8.1% of the walleyes surveyed were over 19". That number dropped off significantly in the 1989 survey, to 3.8%. But the scenario I outlined would be expected to produce that result with or without spearing. And only three years later, in the 1992 survey, it was right back at 8.1%. And my model would also predict that result - it's all about year-class strength. Interestingly, harvest rates in 1992 were worse again, as in 1975 - this time, it was 7.2 hours per walleye. The 19"+ number was down again in 1997, to 4.6% - and harvest rates were up, at 4.3 hours per fish. They were also higher in 1989, at 4.8 hours/fish. So having more big walleyes may not be what you want if you're looking for good catch rates. As I keep saying, bigger walleyes can afford to ignore 3" minnows when they have 6" perch available. If you're strictly a jig-and-minnow guy, like it or not, you're going to do best on a lake full of mostly 14-16" walleyes. Regardless, the proportion of bigger walleyes is always going to go up and down as a result of variations in year-class strength. But a population of modestly high density is going to be much more stable than a population of exceptionally high density, because while it will encounter annual variations in reproductive success due to changing environmental conditions, it should remain roughly in balance with its prey base and avoid any huge crashes. I think the 19"+ proportion will be fairly high again in this year's survey, perhaps even above the 1975 and 1992 levels -we had a couple excellent year classes early this decade that will be above the 19" mark this year. So stock up on the Husky Jerks!
Actually, it should lead to stronger year classes.
Nature is complicated, and looking at it through simple eyes often misleads. It may seem intuitive to assume that more eggs would equal a larger year class. But you'd be wrong, as usual. I've explained this to you before, so this time I'll let someone else say it for me:
"Since fish produce such a large number of eggs, an 8-pound female walleye would produce around 200,000, it takes only a handful of adults to maintain a population. In fact in walleye populations the maximum production of young walleyes usually occurs when there are low to intermediate densities of adults. At high adult densities walleye recruitment is usually reduced. This occurs because of competition between adult and young walleye or because of cannibalism (i.e. adult walleyes eating young walleyes). Therefore, you do not need to protect the maximum number of adults in order to have good recruitment."
Taken from here: http://www.ngpc.state.ne.us/cgi-bin/...;f=15;t=000032
And as everyone who actually reads my posts is aware, your last sentence completely misstates my position. I'll refresh your memory:
"Fast-forward to about 1984. The last strong walleye year-class hits desirable size. And that first stronger year class of smallies is now spawning. At this point, we're at the bottom of the cycle - prey species are already rebounding, and so is walleye recruitment. The following year, the fishing suddenly becomes tough, since natural prey is abundant and there aren't enough new fish to replace last year's harvest. And the damage is permanent. Over the next few years, angler harvest and spearing further reduce the adult walleye population, to the point that the best it can do is replace the fish that are harvested each year, give or take a few.
Clearly, I have not claimed that angler harvest and spearing had no effect on the adult walleye population - in fact, I explicitly said that it has. What I have been arguing is this: The increase in the smallmouth population had nothing to do with the adult walleye population, but with the juvenile walleye population. And the enormous increase in the smallmouth population that was already evident in 1989 (relative to 1975) is a strong indicator that it had already begun several years before spearing started, and would have occurred with or without spearing.
Finally we're getting somewhere!
So you do believe spearing and angler harvest led to walleye depletion giving the smallmouth bass an opportunity to grow in numbers. Thank goodness, I was starting to think you were just being stubborn.
What do you do, skip every other sentence?
Did anybody else think that was what I said? This time, I really am giving up.
Possibly useful...definitely interesting
Okay, so how about some information from the surveys that might actually improve your success rate? In the 1997 survey, they identified 6 key walleye sub-populations spawning in different areas, and did population estimates for each area. The largest sub-population, and this will surprise more than a few people, actually spawned in Baraboo - over 19,000 adult walleyes. The Turtle River was second, at about 15,000, followed by Beaver Flats, Horseshoe, Bonies Mound and the Manitowish River, in that order. By the way, I think jjeyes19 was off by quite a bit in his estimate of the size of Baraboo. Looking at it relative to the map scale, I'd guess the basin itself is pretty close to 300 acres. Now, I don't think you'll find 19,000 fish in Baraboo during most of the season, although I do consistently see a lot of suspended fish on my sonar during the summer months, and rarely see anyone trying very hard to catch them. However, they're definitely packed in there in the early spring and late fall, and if you check out my sideimaging album, you can see where some of the deep rock reefs are located.
They also looked at relative angling pressure for these areas, and I think their findings provide some useful insights if you're looking for the best odds for catching walleyes, at least during the post-spawn period and late fall (I'm sure they disperse all over the lake during the summer, going where the food is, but walleyes often make kind of a mock spawning run in late fall when water temps drop into the mid-40s). It turns out that while 27% of the total population spawned in the Turtle, that area received 36% of the total angling pressure during the season, probably due to the resorts. Baraboo was the opposite, having 36% of the spawning fish but only 27% of the fishing pressure. Beaver Flats and Horseshoe were also relatively underpressured, while the Manitowish was relatively overpressured and Bonies received fishing pressure roughly equal to its share of the population. Something to consider, and it will be interesting to see if this year's survey results include a similar analysis and if so, whether anything has changed.
Math is not only dangerous...
it's often incorrect. Take for instance all the numbers about populations, sub-populations, bio-mass, etc. All guesswork.
Here's a direct quote fron an article concerning the population of walleyes in Mille Lacs. The Minnesota DNR has devised a complex computer model called the VPA (Virtual Population Analysis) -
"But even the biologists who devised the VPA have little confidence in its ability to generate an accurate population estimate. The problem is, every piece of information fed into the VPA has a wide margin of error, most of which cannot be accurately measured. So the combined error is unknown, and so is the usefulness of the VPA. The DNR continues to "tune" its model in an attempt to improve its accuracy, but the underlying problem of insufficient or unreliable data cannot be solved anytime soon."
Since this was written in 2002, it pretty much calls all those cute figures we've been seeing in this string into question.
I also spoke with Jeff Roth a year or two ago and he agreed with me as to my theory on the timing of the smallmouth population explosion and the beginning of spearing. He also directed me to a DNR agent in Minesota to discuss issues with spearing on Mille Lacs.
Blue Ranger keeps talking about weak walleye recruitment in the early '80s that started the smallmouth population increase. My question is this, the TFF was around for over 5 decades before spearing started. In all those years, there had to be several even consecutive years of bad walleye recruitment. Heck, they were even stocking smallmouth bass, but no, nothing changed. Maybe some bad years of walleye fishing, but the walleye always remained the top predator in the TFF. I was speaking with Paul R. last week. From 1953to 1988, he remembers catching 1 smallmouth bass. It was so rare, he remembers exactly where he caught it. After 1988, they stopped going to the TFF for several years, and when they came just about 4 or 5 years ago, they were stunned. Smallies all over the place.
I know Blue Ranger says 1989 was when the enormous increase in the population of smallmouth bass was noticed, but you'd think Paul might have nailed at least 1 in 1988. I mean the population increase was enormous. Blue Ranger says so.
If there was some smallie spawning going on before spearing, it was nothing compared to what happed after spearing started.
I would love to hear from Don Pemble as to when he started catching smallies, but I totally understand if he feels best to not pick sides.
jjeyes19: It just ain't so.
This topic has been extensively researched through data analysis of over 200 northern Wisconsin lakes surveyed over a 13 year period. The only gamefish found to strongly interact with walleye populations were largemouth bass, which prey heavily on juvenile walleyes. Musky populations were actually strongly positively correlated with walleye populations - in other words, lakes with high musky populations also had high walleye populations and vice versa, suggesting that both do well in similar environments and there's no significant interaction between them. There was no statistical evidence that either smallmouth bass or northern pike abundance had any relationship to walleye abundance. Look it up:
Fayram, A.H., M.J. Hanson, and T.J. Ehlinger. 2005. Interactions between Walleyes and Four Fish Species with Implications for Walleye Stocking. Journal of the American Fisheries Society 25:1321-1330.
I Got Some Facts For You!!
Earlier in this thread you defended your heavy bias towards smallmouth by stating "As for me, I'm certainly not a smallmouth fisherman". I just took a look at some of your pictures and here's what I found.... Not a single picture of a walleye. Two pictures of smallmouth bass with the following captions, "The pound for pound champion" and "The only thing better than a lake full of these is having lots of time to go out and catch em".
Fact: Everything Blue Ranger has written has been from the perspective of an individual who prefers smallmouth bass over walleye.
Fact: The lake now has less walleye than it had before spearing started.
Fact: The lake now has more smallmouth bass than it had before spearing.
Fact: Smallmouth bass and walleye compete against each other for food and space.
If you look at the 2007 TFF Fishery Management Plan 51 of the 54 attendees had a high interest in walleye. Only 15 of the 54 attendees had a high interest in smallmouth bass. Oddly enough the same number of participants (15) had little or no interest in smallmouth. Those of us who enjoy the TFF walleye want to protect them and we were having a little discussion about doing just that. If you don't have a genuine interest in the topic you really don't have to chime in and start correcting people!
Blue, I just spent a little time reviewing some of the old threads and reading your posts. You really spend a lot of time telling people how they're wrong and how you're right. You give people credit for good posts (posts you agree with) and lambaste the bad ones (posts you disagree with). You even criticized the song choice on the vacation video eagleeye posted! I personally am a little tired of your "know it all", arrogant approach. My advice to you... lighten up and little bit and you just might find someone to fill that empty seat in your boat. Oh, you may also want to revisit your choice of hats.