Tag Archives: science

How Misery surely Loves company

With the exception of male models in carefully creased fishing vests hawking angling gear in magazines, I’ve been reluctant to piss on fellow members of the angling brotherhood. Ditto for television and radio personalities, as I’ve assumed them to be reasonably honest versus an avaricious SOB, whose focus is to promote their guide service. Most sins of exaggeration or inaccuracy chalked up to the notion that  angling media are akin to weather people; they mean well, but rarely get the forecast correct.

That’s a nicety I’ll no longer observe.

After six or seven weeks scrimmaging with Lake Berryessa in hopes the “top water bite” would materialize, I’m convinced we won’t have one this year – compliments of the California drought.

This being in sharp contrast to the pundits on the Bob Simm’s radio hour, which insists that anything with fins is climbing the bank begging to be hooked – on dry land even.

Personal observation and discussions with fellow fishermen suggests no one can figure out where the fish are – and that extends to the Kokanee Salmon and anything else plying the waters of that drainage.

Us fly fishermen, ever mindful of Science, have always insisted on the plausible explanation and Latin-tinged theorem, rather than relying on the more mystical,  “… use the Big Red Sumbitch – Let God Sort Them Out” approach popular with bass fishermen everywhere.

While much is known about river dynamics and flowing water, lakes have always proven a bit of enigma for fly fisherman. We look for the same things we see on rivers; bugs, differing currents, weather, and cover, but we’re ill at ease given that lake fishing exposes the soft underbelly of fly fishing – how poorly our tackle sinks and how deep water is our absolute undoing.

2015 Drought

I took the above picture of Berryessa’s banks in June of last year, just before the blast furnace of summer hit the area.

The Grass Belt is the historic fill level of the lake. If the lake is full, that water will rise to that region, about 10-30 feet from the tree line. The Brush Belt is the area exposed during the 2014 drought year. It has had seeds drift into that area from both wind and receding waters, and the growth has been buttressed by what little moisture fell during the 2014 Winter and Spring of 2015. The Just Exposed Belt is the area that has receded during the meager 2015 Spring, and will dry further as the 2015 Summer bakes the area.

By the end of Summer 2015, the loss of water had exposed nearly 200 feet of bank on the steeper canyon areas – which translated into half a mile or more of shallows exposed in the wider portions of the lake.

This Spring we had one superb storm that lifted the lake level at least 30 feet from its 2015 low point. On the shallow ends of the lake those flats exposed were reclaimed by the waters, leaving shore anglers the ability to cast only to the recently reclaimed area, now thinly covered with water.

Clue 1: Those ain’t weeds, those are Stems

In the bays formed by the undulating shoreline, the sudden glut of water had covered the exposed soil in wooden debris and  terrestrial plant stems. No leaves or greenery suggesting they were of recent vintage, rather they were sodden and waterlogged, with enough woody material to lift them to the surface, where the wavelets formed by the boat traffic piled them in heaps at water’s edge.

Looking at the above picture, and remembering the sequence of events – suggested this was the remnants of the Brush Belt. Once lush and green during Spring, now dried and dead from Summer, and forced underwater by the rising lake.

The idle currents near the shore break the stems into pieces, and they have enough pithy material to float ashore. These stems represent the only cover remaining underwater, leaving a featureless dirt embankment with no cover for hiding or ambush.

Clue 2: Where’s the forage?

Any self respecting minnow knows immersion in water teeming with hungry and voracious predators, requires both cover  and shade, things that you can hide among or behind, anything that allows the minnow school to pursue insects and forage suitable for their survival

These schools of bait were visible all of last year. Weed beds and plant growth would die once the water receded and exposed them to the harsh daytime temps, but the schools of forage fish would recede with the water – as the weeds blanketed the lake floor.

Add thirty feet of water delivered over a single week of runoff, and you have many hundreds of feet of dead soil now covered with water, but lack weeds, shade, or cover of any kind.

No cover means no bait, and that means no fish other than the occasional cruising bass.

Clue 3: Where are the beds?

Bass spawn in shallow water, leaving scarred whitish areas that the female sweeps clean with her tail. Often she stays on the bed, which is part of the allure of the Spring top water bite … big fish, shallow water, and the desire to kill anything approaching the nest.

Bass anglers have always taken advantage of this phenomenon with great glee, as there’s nothing more exciting then the visual element associated with casting at visible fish. The notion of “cradle robbing” apparently is suspended for the duration of the festivities …

This year I have seen only a single bed – covered by a solitary fish. It was in a back bay whose bottom had lots of algae and cover, suggesting bass also look for cover and shade to offer protection from predators.

The clean dirt areas are devoid of life. No beds visible, almost no foliage or weed growth, and few fish prowling for food.

deadZone

The above photo shows a “dead zone” bank. All dirt, no foliage of any kind as it was dried and desiccated by 2015’s summer sun. Note the pithy debris at water’s edge – mostly dried stems and dried thistle clumps (also shown in the water).

This lack of foliage means the dust in the soil leeches into the water as soon as boat wakes bathe the area. This thick band of dirty water provides the only cover for many hundreds of feet, and I always keep a weather eye out for signs of baitfish. So far, nothing.

Conclusion: Boat fishermen are better off

With no cover available to harbor baitfish, and with the water depth denying us that area of the lake that still has cover, my dismal conclusion is that the fish, their beds, and the minnow forage, are all too far from shore for bank fishermen to take part.

Six trips, in as many weeks, has yielded no fish activity of any kind.

I’ve not seen a boat angler catch a fish either – as many are fishing in close to the bank – consistent with a traditional wet year. I’m thinking that deeper water still retaining weeds and cover are where the fish are and the typical mobile bass angler is motoring  past them enroute to joining me in the Dead Zone.

Like Misery I surely loves the company, but I wish they would heed my “wave off.”

Balance versus Purism, the war continues

purism_suxDry fly purists always insist they practice the One True Calling – and characterize whatever the rest of us do as being coarse and inferior.

Us “normal” fishermen think them perfumed ninnies – whose real ambition is to keep the sport free of common folk and ensure membership is limited to hedge fund managers, bankers, and the monied elite.

Only on matters of conservation can the two factions ever agree on anything, and despite an uneasy alliance, the combined meager vote counts solved little beyond a token attempt at unification and cooperation.

Now Science has vindicated both Dry Fly Purists (DFP) and our Nymph Fishing Insurgency (NFI), as they’ve determined that fish close to the surface are the smartest fish with the biggest brains, and as the water deepens – fish become dumb as fence posts.

Fishes that live very deep are known to have much slower metabolisms than species that live in relatively shallow water and one of the costs of that appears to be a reduction in brain size,” said Dr Iglesias.”

Purists can now achieve the Moral High Ground and insist that dry fly fishing is both akin to godliness AND their fish are smarter …

… and us meat-minded bullies amuse ourselves by tossing cone heads at retards.

There is some solace in our catching twice as many fish as the perfumed dandies, and NFI’ers could care less about which fish is smarter. We know that by the third retelling, our fish are likely to have invented cold fusion – and only our prowess at seduction  saved the entire human race from extinction.

Assuming fish populations are a rough mirror of human diversity, and any morning commute proves there are more ‘tards then Mensa members, suggest there’s little doubt as to why bead headed flies dominate a fly shop’s inventory.

Another reason to watch your footing

Despite drought and water rationing, dwindling fish,and fly rods costing as much as a house payment, we’ve got news that will swell our dwindling ranks with eager young converts – hell bent on saving both split bamboo and the environment, regardless of the costs.

perspirationFishing has always been framed as a bothersome exercise, unappealing to successive generations of urban youth, whose refined senses and exposure to woodlands being the neighborhood green-belt where they crap their overweight pooch …

With Hipsters and Millennials in the “sweet spot” demographic, Science has tailored a perfume which will release its scent in proportion to the volume of sweat given off by the wearer, ensuring tradesmen and anglers, and their inattention to hygiene, will be the new “retro” – and our parking lots will be crowded with bearded, flannel wearing anglers, whose flowery bouquet will turn the stomach of everyone nearby.

… and any SOB with the temerity to actually fall into the water will likely change the smell of the entire watershed …

Now carpenters, pipe-fitters, and long-shoremen will be whistled at by the secretaries streaming past on their lunch break, as construction sites will be characterized by “Prairie Blossom” or “Denali Rose” … and investment bankers, with their avaricious demeanor and icy handshake will smell coarse and common.

In addition, the perfume system also has the ability to remove the bad odours that come from sweat. The ‘thiol’ compounds that are responsible for the malodour of sweat are attracted to the ionic liquid, attaching themselves to it and losing their potency.

The breakthrough could have major commercial possibilities, potentially providing a new way to develop products for the huge personal care market. QUILL researchers are currently working with a perfume development company to identify a number of product ideas that could eventually be sold in shops.

   –  via Science Daily 4/2/15

Can slow release mosquito repellant be the game changer that’ll propel our sport into ranks enjoyed by the NFL and Major League Baseball?

Science provides inspiration and wisdom does the debunking

I’ve always assumed Renoir and Degas had similar issues with us fly tiers; a couple of decades spent on rigorous painting tedium, and saddled with the costs of painting supplies, groceries, and a roof overhead, true masterpieces were sacrificed for the more mundane portraiture … because painting Madame … paid the bills.

Fly fishing, especially during those cold months between Winter fisheries and Spring, endures a similar tedium, where inspiration comes occasionally, and inclement weather and work combine into  books read, magazines thumbed through, and daydreams of future successes.

I used to find inspiration from periodicals, where fresh ideas and the exploration of new fisheries caused me a fit of tying creativity or made me lust after new terminal gear. Unfortunately, fresh ideas are in limited supply, and periodicals eventually yield to the stale yet profitable, and every Bahamian bone fishing article looks like ISIS reconnoitering Mosul, the difference between the two the color of their sun buff …

With the Internet and its ready access to all of the great colleges, organizations, and  sources of fisheries research, the Scientific community is an underutilized source of freshness in angling ideas. Theories abound on fish, bugs, stream dynamics, global warming, and invasive species, and even a casual knowledge of fish and bug behavior allows the reader to follow along from proposal to conclusion.

The volume of research is staggering, and while much is in its infancy (and is best served as simple topics to mull), a great deal more is mature – and for anglers  seeking new insight into their quarry or craft, become a source of ideas and topics that will never be mainstream enough to grace our angling press, or may feature conclusions that counter current ecological practices and are ignored by our conservation organizations.

In short, if you don’t turn over the stone yourself, no one will turn it for you.

This Spring has seen me start down a thread I found interesting, and resulted in many hours of fervor at the vise. What started simply – as a dissertation on Guppies has led through a chain of other papers, physics, and conventional wisdom, and while both conclusions and flies will always be questionable – the enjoyment of discovery and new inspirations have made the journey completely worthwhile.

The April issue of the Royal Society Proceedings B, has an article discussing the notion that patterns, motion, and coloration of prey (flora and fauna) are inheritable in Guppies, a freshwater fish.

After a great deal of rigorous experimentation the authors concluded Guppies prefer red or orange, and don’t particularly care much for blue. What fascinated me was the discussion that like bees, guppies were capable of honing in on patterns exhibited by their prey (both motion and coloration) akin to bees and birds and the specialized pollination coding on flowers.

For those as are unfamiliar, flowers are colored (both primary color and patterns of color on their petals) to attract the unique insects and birds that can best pollinate them. So long necked flowers that bees cannot climb into are coded for Hummingbirds, and anything with a long, thin proboscis that it can wad into the barrel of the flower.

This notion that freshwater fish may have similar tendencies I found fascinating, given that if anglers accept this notion it would likely spawn a bazillion new patterns that resembled (in coloration and pattern) everything from Green Drakes to discarded French fries.

As Mother Nature colors her insects to resemble the stream bottom, the notion of red or blue is a bit far fetched, but it does buttress our notion that color of the natural is worth imitating, in either dry or wet variants. Inheritance would also ensure that planted fish, should they survive, would also trend toward the same food choices of wild fish – as both groups must dine off the same menu.

Color and shape are the most copied trait of the modern fly tier, a reflection of the prevailing  “match the hatch” logic that has dominated fly fishing for the last several decades. Patterns in coloration and motion are the “less traveled” path, given how fly tying materials have dictated how the resultant imitation moves.

Natural materials being a bit more lively than synthetics, but only by accident, as many natural materials can be stiffened by the simple act of attachment to the hook.

Having to use a “J-shaped” bit of steel to contain all the parts of the natural is also a delimiting factor. Any discussion of imitation has to also recognize the limitations of physics on our potential options.

After a couple of weeks ferreting out full motion videos of mayfly nymphs in their natural settings, and viewing them for signatures akin to how a bee might view flowers, it is quickly apparent that there is a couple of patterns of color on a typical mayfly when swimming. The first was due to its carapace and color density imbued by thickness, and the second was due to gill motion, and the lightening effect that lateral gills (and the light-colored cilia attached) and their constant motion have on the surrounding colors of the insect.

Mayfly_Pattern600

Should this wild notion of torso “pattern-key” being the missing ingredient in the complete subjugation of Salmonids, I could expect some lofty company. The thought of my Portly & Brazen suddenly synonymous with Gordon, Skues, or Sawyer was pretty heady, but a couple of decades of wisdom tempered my flirtation with ego.

Tying flies with this type of pattern in their torso had some very obvious shortcomings …Physics being the most sinister, as all of my full motion vignettes quickly displayed.

BellyBackIn moving water most fish face upstream. Insects dislodged due to mishap or swimming to the surface come downstream (roughly) head first. Fish on the prowl for targets likely don’t see anything of the abdomen patterning save the wink of dark top or light belly, and only if the insect is swimming in its customary violent tail-centric, up-down, fashion.

In still water the fish can encounter an underwater insect along any axis, and the predative view may not even involve any signature other than motion, the frantic attempt to evade being eaten triggering the pursuit.

Fish_eye_nymphbutt

Not to mention the notion of the fish’s eye not being the same as our stereo flavor, and the exaggerations of coloration that exist when converting a stereo image to an approximation of what we think fish see

… and therein lies the beauty of Science and the unending appeal it has for me and my dull Winter months. A constant stream of facts and theorems that promise future success – all of which must be tempered with angling wisdom and experience, in order to determine which theory will fill next season’s fly box.

What’s not important is whether any chain of facts will result in more fish caught, as the angler cannot determine what he would have done had he fished other flies. What is worthy is to continually question the status quo, given the shaky ground all of our current angling truisms are built upon.

Fossil Record shows Didymo Geminata is native rather than invasive

stickey_RubberYou’d think Science, knowing our history of continental land bridges and pre-historic migrants overwhelming natives, would have consensus on how many thousands of years it takes something to dominate its surroundings to become the new “native” – but you’d be wrong …

The latest science involving Didymo rethinks the “invasive” label, as examination of the fossil record of lakes and streams afflicted by the diatom are finding the Didymo has been resident on five of seven continents for many thousands of years.

The Delaware River shows Didymo having been present for tens of thousands of years, rather than recently introduced by fishermen. Dissolved Phosphorus can dip below its normal threshold via numerous temporal phenomena, and with that change in water chemistry, triggers the visual “blooms” that gives the infestation its characteristic unappealing blanket. As quickly as water chemistry is restored, the blooms vanish, explaining one of the great mysteries of Didymo infestation.

Moreover, fossil and historical records place D. geminata on all continents except Africa, Antarctica, and Australia; records place D. geminata in Asia (China, India, Japan, Mongolia, Russia), Europe (Denmark, Finland, France, Germany, Ireland, Italy, Norway, Poland, Portugal, United Kingdom, Sweden), and North America (Canada and the United States), and historical records dating back to the 1960s place D. geminata in South America (Chile; Blanco and Ector 2009, Whitton et al. 2009). The recent blooms of D. geminata are found on each of these continents, where fossil or historical records have been documented, which indicates that attributing all blooms to recent introductions or to range expansion is incorrect.

… and as the last article mentioned, our collective angst in approaching our respective legislatures was a tad premature …

In fact, citing the threat of human-induced translocations of D. geminata or other unwanted organisms, seven US states (Alaska, Maryland, Missouri, Nebraska, Rhode Island, South Dakota, and Vermont), Chile, and New Zealand have passed legislation banning the use of felt soled waders and boots in inland waters (e.g., the 1993 New Zealand Biosecurity Act, Chile’s law no. 20.254, Vermont 2013 Act no. 130 [H.488]). Although such restrictions may reduce introductions of other deleterious aquatic microorganisms, the connection to the spread of Didymo. geminata within its native range seems dubious.

What’s even more interesting is the final definitive science will employ DNA sequencing of the respective colonies to see which continents have unique strains, and which continents may have sourced strains carried by everything from humans to migrating waterfowl.

The assertion that the recent blooms are caused by inad- vertent introductions of D. geminata cells by humans comes from frequent reports of blooms in areas that are used for recreation or monitoring by various agencies (Bothwell et al. 2009). Although Kilroy and Unwin (2011) reported a correlation between the ease of river access and D. geminata blooms in New Zealand, this has not been found in North American studies. In fact, systematic observations at both rivers with frequent human activities and remote rivers not heavily used for recreation or monitoring reveal no association between human activities at a river and blooms in Glacier National Park, in Montana (Schweiger et al. 2011).
Moreover, pathways for introducing D. geminata cells have existed for decades (e.g., felt-soled shoes; the transport of fish, their eggs, and water from areas where D. geminata is determined to be native on the basis of fossil records), making inadvertent introductions by humans difficult to explain, given the recent worldwide synchrony of blooms.

Really good article for the lay person given the science is common sense and easy to follow. I recommend you read it and draw your own conclusions.

As I adore a good conspiracy theory, I find it equally interesting that our fishing media and conservation organizations have published nothing on how scientists are reconsidering earlier theories as more concrete observations accumulate.

I’m sure those that insisted we act responsibly, by first purchasing new wading shoes, donated most generously …

Cut, Slash, and Riposte

I’ve assumed anything I can learn about fish serves me in good stead, and anything known on their feeding habits or behavior will assist me in seducing them to take my fly.

I’ll confess that I’ve wondered just what the “bill” of a billfish is used for – given I‘ve never seen some dolphin or unwary scuba diver skewered prominently on their beak.

Scientists suggest that the bill of a billfish is actually used as a sword, by first inserting the bill into a cluster of tightly packed baitfish, then slashing through the school to wound and disable.

Billfish uses bill to cripple baitfish via slashing motion of head

The above Youtube video shows the action of insertion and then the subsequent slash, and the trailing bits of scale and baitfish that result.

At least I’ll know what to expect when I deploy my “Alabama Rig” in blue water.