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The Mind of the Trout -- my review of a really interesting book

By Troutnut on February 5th, 2013, 6:34 pm
I took advantage of a long flight back to Alaska yesterday to finish reading Thomas Grubb's 2003 book, The Mind of the Trout. It's very good. I'm surprised to see it hasn't come up in discussions here yet, because this site caters directly to the book's target audience of scientifically curious fly anglers.

Most scientifically oriented fly fishing books focus on the insects trout eat, just like the aquatic insect encyclopedia on this site. We devote hours upon hours to learning how to distinguish between nearly identical mayflies using microscopic features. While some entomology does help us catch more fish, we take it to levels that would be absurd if catching more fish were our only purpose. We really do these things because we enjoy every minute on the river more deeply when we better understand what's going on around us. The cycles of aquatic life are fascinating dramas, and dramas are more enjoyable when the characters are well developed. When we understand the life story of each insect we see, when we know the trials and tribulations of its life cycle, the whole experience is more profound. Entomology tells us about the characters in the stories we witness on the river.

It seems odd, then, that we largely overlook one character in our hunger for scientific detail: the trout. We have plenty of observations of trout behavior as it relates to catching them: where they like to feed, how to avoid scaring them, what time of day to pursue them, etc. That's good practical advice from angler to angler, and many of the best angling writers (like LaFontaine and Marinaro) were real scientific naturalists in all but formal title. But the scientific literature also holds some very interesting information about why trout do what they do, and angling writers have overlooked most of it.

The Mind of the Trout changes that. This book, written by a scientist with relevant expertise, very thoroughly summarizes the scientific literature on several subjects related to how trout live and, especially, how they think. It nicely ties in relevant science from other animals when an important question hasn't yet been studied in trout. The author adds excellent insights of his own to fill some of the gaps and tie scientific findings to angling. The book is written on a level for anglers who enjoy technical detail but are not steeped in the jargon of the field. However, I'm completing a Ph.D. on the behavioral ecology of salmonids, and I still learned a lot from this book. I can guarantee the same for anyone who reads it.

Whether or not this book is for you comes down to what you want to learn. Just like the technical books on fly fishing entomology, most of the book is superfluous to the task of catching trout. This is a book to help you appreciate the trout. It sometimes leaves us unsatisfied with how little is known about an interesting question, but that's not the book's fault -- it honestly summarizes the best science has to offer, but the scientific study of trout behavior and cognition is a young field that has barely scratched the surface of the difficult mysteries it's exploring.

I would not recommend this book to someone who picked up a fly rod for the first time last month. However, if you're the kind of angler who can name more than three stonefly mouth parts off the top of your head, but the term "optimal foraging theory" is unfamiliar and you can't fully describe the relationship between food, temperature, and trout growth, then I think you'll enjoy it as much as I did.

Most recent comments on this post (latest on top)

PaulRobertsMarch 4th, 2015, 12:59 am

Posts: 1776
Probably a dead end, or a train heading in my direction. :)

I wonder that too. :) Yet, I am undaunted, and still kickin'.
OldredbarnMarch 2nd, 2015, 10:42 pm
Novi, MI

Posts: 2608

The contrarian side of myself hasn't always been comfortable with itself when I become complacent. The dialectic is always egging me on. I've always thought it growth, but it may be a sign of something else...Just think that questioning leads us a little further closer to, dare I say, something akin to the truth...

Probably a dead end, or a train heading in my direction. :)


Jason...I will read the book and I promise to get back to you.

"Even when my best efforts fail it's a satisfying challenge, and that, after all, is the essence of fly fishing." -Chauncy Lively

"Envy not the man who lives beside the river, but the man the river flows through." Joseph T Heywood
PaulRobertsMarch 2nd, 2015, 7:30 pm

Posts: 1776
Spence, I think Mr. Wyatt is right on. And... I think I know why (Ėimmodest as it sounds). To me, thatís exciting. Thanks for the links.
MiltRPowellMarch 2nd, 2015, 5:15 pm
Posts: 106The true angler is generally a modest man...
Thaddeus Norris
The American Angler's Book (1864) (Before A Boast)
OldredbarnMarch 2nd, 2015, 4:12 pm
Novi, MI

Posts: 2608
Ok...I wasn't going to go here, but...I've already upset my friend Tony in a text when I mentioned Bob Wyatt...Anyone heard of him?

I think that Mr. Wyatt would rattle a few hackles here...See my original response above. We anglers do prefer to hold tight to our personal fantasies of what it is we are really doing here, when we chase Mr. Trout. :)

Otherwise...How could we justify the effort, the long trips, the outlay of dough for tackle? Maybe some would prefer that Pandora's Box stay closed.

"Even when my best efforts fail it's a satisfying challenge, and that, after all, is the essence of fly fishing." -Chauncy Lively

"Envy not the man who lives beside the river, but the man the river flows through." Joseph T Heywood

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