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News From Behind the Scenes at Engbretson Underwater Photo and Stories about the Freshwater Environments We Visit.




Thursday, July 30, 2020

There's a Poisonous Spider in Your Wetsuit!

It was a normal day much like any other. I drove from my home in northern Wisconsin to a nearby lake in Michigan’s Upper Peninsula to take underwater pictures of largemouth bass.  The water was clear, the fish eagerly posed for my cameras and another successful dive trip was in the books. While changing out of my wetsuit I noticed what I thought at the time was a mosquito bite on the calf of my leg. I work in lakes and rivers every day, so dealing with insect bites are routine. I didn’t think anything of it. The next morning, the bite seemed to look a little odd and I took this picture of it.


By the end of the day, it was clear that the bite was infected and looking worse. The doctor I saw that evening told me it was likely a non-venomous spider bite. She prescribed a dose of antibiotics, bandaged it and sent me on my way. Three days later, I was in the emergency room. My entire leg was severely swollen and had turned bright red. The area around the bite was badly infected and turning black. ER doctors peppered me with questions and determined that the bite had come from a Brown Recluse Spider, one of three venomous spiders we have in the USA.

The bite of brown recluse spiders contain a potentially deadly hemotoxic venom.  These toxins destroy red blood cells, disrupt blood clotting and cause tissue damage.  We’ve all heard terrifying stories of what can happen to people who are bitten by brown recluse spiders. The worst cases, the ones that get all the press, are indeed horrifying.
 

In the ER, I was immediately placed on a powerful antibiotic IV drip. The prescription antibiotics I had been taking are ineffective against venomous spider bites. They were replaced by a much stronger type. I was also prescribed another drug that is typically used to treat leprosy, to help prevent possible tissue loss.  

The doctor who examined me speculated that my wetsuit had caused compression on my leg that may have exasperated the effects of the bite and the amount of venom the spider had injected.  Did the spider somehow get into my wetsuit while I was at the lake, or did it crawl inside the suit while it hung in its regular place in my basement laundry room?  Who knows? 

It’s been four weeks and my wound is barely noticeable now. I consider myself lucky that I won’t have a permanent scoop mark or divot in my leg. Scuba diving has inherent risks and dangers, but until now, I never thought those risks also included poisonous spider bites. 

From now on, I’ll be diligent where I store my wetsuit between dives. More importantly, I think it’s critical to carefully check your wetsuit, dive boots, gloves, and all your dive equipment before every use. They all provide the kind of dark and secluded hiding places spiders like to inhabit, especially if they’re routinely stored in your basement or garage.        

Saturday, June 20, 2020

What's the Easiest Fish to Photograph Underwater?

Smallmouth Bass Underwater (c)Eric Engbretson

I received an email the other day from someone who asked me what I thought was the easiest fish to photograph. Well, none of them are that easy to photograph well, but if I had to pick one that gave me the least trouble, it would be smallmouth bass. The reason for that is they have a unique inherent curiosity and sociable nature. They’re not by nature a timid fish so they'll eagerly come around you. I think they've learned that divers stir up food items. They’ve kind of put that together. So when you get in the water, you’ll get them following you around after a while. It’s not unusual at the end of a dive to have 15 or 20 smallmouth bass in a parade, following you. 

If a smaller one comes too close to you the larger ones will chase them away so they can have exclusive access. Because they are so friendly and easy to approach, you can blow all the bubbles you want to or spend crazy amounts of time fooling around with different camera adjustments or lighting angles without worrying about them being scared off.  

They're an excellent fish to spend time with if you're a novice photographer, because they have loads of patience. But after decades of underwater photography, I wouldn't say photographing them is especially challenging. At the end of a dive, if I can’t find anything else, that’s when I do the smallmouth pictures.

So, what's the most difficult fish to photograph? I think it's the carp. They are so aware. They have excellent vision and hearing. They can see you so far away in clear water and if you make any slight noise, they're gone. Even if you don’t blow a bubble but you take a breath, it makes a tiny whooshing noise. It’s such a tiny sound, but they hear that and they react. You have to be so still and so quiet. 

What I do with carp is I pick a spot where I know they’re milling about and I get behind a rock and hide and hopefully one will cruise by. If they see you it’s over. They’re really smart and are really sensitive to the bubbles of divers. That's why they give me so much trouble. But they're not the only species that are bothered by bubbles. Crappie, yellow perch, trout, catfish, sturgeon are some others. They’re all hard to get close enough to to get great pictures. To be successful, you need patience, and frankly a lot of times luck.


Tuesday, May 26, 2020

What are the Clearest Lakes in Wisconsin? 2019 Report


What are the clearest lakes in Wisconsin?  Every year, I consult with Wisconsin's state-wide citizen's lake monitoring group. They're a network of individuals, usually lake-front property owners who monitor and regularly take a variety of water samples from lakes all across Wisconsin.  The data they compile helps to give us a look at how our lakes are doing. 

One of the many tasks lake monitors perform is to take regular secchi disc readings. This is a universal way of assessing and comparing water clarity.  I'm always interested in knowing which Wisconsin inland lakes are the clearest.  Ordinarily, I rank the lakes that recorded the highest average water clarity for the previous year. This year, I'm looking at lakes that recorded the single highest secchi disc reading in 2019. Here are Wisconsin's clearest inland lakes and their highest single day water clarity readings taken in 2019:

1)   Pine Lake, Waukesha Co. 52 feet
2)   Lake Metonga, Forest Co. 37 feet
3)   Maiden Lake, Oconto Co. 35 feet
4)   Wazee Lake, Jackson Co. 34 feet
5)   Sugar Camp Lake, Oneida Co. 33 feet
6)   Whitefish Lake, Douglas Co. 31 feet
7)   Lake Lucerne, Forest Co. 31 feet
8)   Deer Lake, Polk Co. 30 feet
9)   Crystal Lake, Marquette Co. 29 feet
10) Stone Lake, Washburn Co. 29 feet
11) Lake Owen, Bayfield Co. 29 feet
12) Blue Lake, Oneida Co. 28 feet
13) Smoky Lake, Vilas Co. 28 feet
14) Millicent Lake, Bayfield Co. 28 feet
15) Big Portage Lake, Vilas Co. 28 feet

To see the lake list from 2018, click here. To see the lake list from 2017, click here. To see the lake list from 2016, click here.To see the lake list from 2015, click here.  To see the lake list from 2014, click here.  For the lake list from 2013, click here.  And for the 2012 list of clear lakes, click here.

Sunday, April 12, 2020

Walleye 911: The Walleye & Bullhead Connection


Juvenile Walleyes in Lake Metonga (C)Engbretson Underwater Photo

by Eric Engbretson

Something was going very wrong in Lake Metonga. The 2,000-acre lake in Wisconsin’s north woods had been a successful walleye lake for decades, but by the late 1990s, natural reproduction and walleye recruitment had slowed to a trickle. To make matters worse, by 2004, the adult walleye population had sharply declined.  Spawning habitat was excellent, but young fish, either stocked or natural, were not surviving to adulthood.
 
Mike Preul, fisheries biologist for the Mole Lake Sokaogon Chippewa Community has been involved with fisheries work on Lake Metonga for twenty years.  He took a closer look at the lake to see what changes might explain why walleyes were suddenly having such a rough time. 

The fish community in Lake Metonga had always included black bullheads, but now fishermen were telling Mike how often they were catching the small catfish. “We were doing some routine electro shocking one day and when the stunned fish floated to the surface, all you could see were yellow bellies. That’s when I knew there was a problem”. The abundance of bullheads had become enormous. “We did some simple math and calculated what a bullhead eats in a year. They were taking up a lot of space in the system and stressing the available forage for walleye.”  The theory was they were outcompeting walleyes for important forage at critical times when walleyes need an abundance of specific-sized food.  “We knew stocking wasn’t working, so the idea was that if we could create a kind of void, the walleyes might rush in to fill it.”

Like many fisheries managers, Mike’s resources were limited, and he privately wondered if this was really a battle he could win. His plan was to create conditions where walleyes could thrive, and that meant doing something about how much of the lake’s biomass was tied up in bullheads.  His plan reversed the fortunes of the lake’s walleyes almost overnight. 

In the spring of 2008, Mike began the first of what would become an annual bullhead removal on Lake Metonga. The work was labor-intensive. “At first we set fyke nets, but the fish weren’t moving into them in sufficient numbers, so the decision was made to electroshock for bullheads”.  Mike’s crew worked until their arms ached, shocking and netting the whiskered fish out of the lake. By summer’s end, they had removed 13,337 pounds of bullheads. All the fish were donated to the public, to food banks and to nearby wildlife rehabilitation centers for the feeding of raptors. 

Into the newly created void, Mike stocked 5,000 large fingerling walleye.  The next spring, another 6,216 pounds of bullheads were removed and over two million walleye fry were stocked. But this time, something different happened.  Substantial numbers of young walleyes survived from the two years of stocking and began to show up and be counted in fall recruitment surveys. 

At first there seemed to be no end to the steady stream of stunned bullheads that rose to the surface every time Mike’s crew flipped on the electrodes of his shocking boat. But gradually, fewer and fewer bullheads appeared, and it took longer to fill up the tubs on the boat with fish. This process became a ritual every spring on Lake Metonga and by 2012 the total catch rate had dropped by 87%.  During the same time, the abundance of walleye fingerlings was steadily increasing.

During 2011 there was a large year class consisting of purely naturally reproduced fish. With the resurgence of naturally reproduced walleye, stocking was no longer needed after 2012. With bullhead numbers reduced and in better balance with other fish, walleye production in Lake Metonga boomed. Eventually, both natural recruitment and adult walleye density reached historic highs. For Mike Preul, this felt like the kind of victory that fisheries managers too rarely experience.  “I won’t lie to you, it was a lot of hard work some days, but the results have been so amazing.”




Today Mike Preul spends only a few days each spring shocking for bullheads. It’s become pure maintenance now, like mowing his lawn. “As long as they don’t get out of control, I think we’re good”, smiles Mike.  Walleye production has it’s up and down years but has remained reliable overall.  What Mike learned on Lake Metonga could fill a book. His bio-manipulation method of removing bullheads to rebuild embattled walleye populations was successfully employed on Patten Lake in nearby Florence County and worked like pure magic. When that lake’s over-abundant population of bullheads were severely reduced, the walleyes quickly came back in record-setting density.

Keeping walleye lakes healthy and productive is an ongoing issue, and all lakes face their own unique challenges. Overall, there likely aren’t a great number of walleye lakes affected by bullhead populations, but where such lakes exist, Mike Preul’s pioneering work is one silver bullet that fisheries managers can now add to their arsenal. 

(For further information, questions or comments about his work, Mike Preul can be contacted at mike.preul@scc-nsn.gov)

Saturday, February 22, 2020

Need B-Roll Footage for your Media Projects?

We're always interested in partnering with producers of outdoors related content who are looking for excellent high-quality underwater b-roll video footage of freshwater game fish to include in their programs and films. To view samples of the kind of content available for use, please check out our Vimeo page.  For further information on licensing our video clips for your project contact us.

Sunday, January 19, 2020

Getting Close to Fish: How's That Done Exactly?


How Do You Get So Close to The Fish? Why Don't They Spook?

That's a question I get asked frequently by many people. To photograph fish well underwater, it's necessary to get very close to them. So how do I do that? One thing I've done is to develop a series of techniques that communicate to the fish my lack of hostility, and my general inability to compete with them as creatures perfectly designed for life underwater. One way I do that is to present myself as obviously as possible. I don't try to ambush or deceive them. I don't wear a camouflage wet suit. I don't sneak around or hide behind boulders or timber. I don't try to advance toward a fish when he can't see me. I don't even try to be particularly quiet.

In fact I do the opposite of all those things. I make sure the fish see me coming from a long way away. I try to show myself out in the open and demonstrate what my limitations are. Ideally, you want to convey to the fish how slow and incompetent you are in it's environment; how clumsy you are; how incredibly un-stealthy you are; This is so opposite of what a predator would do that many fish are able to detect that you're not a threat to them, based on your complete lack of cunning or covertness. You want them to see you and think that you're completely ridiculous (which you are of course). The faster you can get them to understand this, the faster their fear will disappear. 

What I'm mainly trying to do with this approach is to begin a relationship with a specific fish or fishes that I expect to see many more times in the future. However, if you have one chance on one day with a fish you know you'll never see again, I'd recommend a more stealth approach. 

Ordinarily though, I'm just trying to get fish used to seeing me. Over many visits to the same lake, the same fish will see me time and time again. Eventually, as bizarre and strange as my appearance may be to them, I won't be considered "an unknown scary thing" to avoid. Fish will come to regard me as that "big funny looking turtle-like thing" they sometimes encounter. Nothing to worry about. Once I can establish this kind of confidence level in the fish, they give me permission to approach closely to get the kind of pictures I want without causing them to flee.

As many who work regularly with wildlife will tell you, it's all about body language. It's the way animals communicate with each other and the only way for inter-species dialogue to occur. Learning how to eliminate unintentional signals of hostility or threats to animals is something we can learn to do and employ effectively in our encounters with them.