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The 80/20 rule in fly-fishing?

The 80/20 rule in fly-fishing?

The 80-20 rule is a powerful and nearly universal, which states that, for a large variety of events, 80% of the results will come from 20% of  causes/inputs. It is also known as the Pareto-principle, after economist Vilfredo Pareto, who observed that 80% of the peas in his garden came from 20% of the pea pods.

The 80-20 rule has a wide range of applications. In business we can observe 80% of sales come from 20% of products (yes, nearly 80% of our rod sales come from the 12ft Iwana, one of five models we offered until a few days ago). In software, 80% of problems come from 20% of bugs, and so on. Now, what about fly-fishing? More specifically can tenkara show us that 80% of our results will come from 20% of our effort,  20% of the spots we fish, 20% our equipment, or 20% of our flies? What are your thoughts?

Can 20% of the spots you hit produce 80% of the fish you catch in a day? Sometimes it sure seems like it, like this weekend when I fished 20 or so pockets, catching most of my fish in 4 or 5 of those productive spots. But, in other streams it seems like every pocket holds a fish, so who knows whether this one applies or not. But, I’m fairly certain if you were to weight them, 80% of the weight of all your fish would be a result of 20% of them.

If 20% of the equipment you carry is necessary for 80% of the results while fishing, is it worth carrying or buying that extra 80% of equipment (think reel, multiple lines or leaders, strike indicators, split shot, etc), for a possible 20% of cases? I personally am content with 80% of results if I’m able to leave that 80% extra burden behind.

Do 20% of your flies catch 80% of your fish?  I carry 4 tenkara fly variations with me, but on any given day I keep one fly on for the biggest portion of the day, so I’m pretty sure I catch at least 80% of my fish on 1/4 of my flies (sure, 25% of them). Now, I know for a fact that if I only used 1 fly pattern, as Mr. Amano does, I would actually catch 100% of my fish on 1 fly and probably beat the Pareto-rule.

I wish I had the discipline to keep a journal and see if the 80-20 rule can be put to the test, but I don’t. However, I have a hunch the observations above are true. I would love to hear your experiences now that you have the 80-20 rule in mind.