Monday, November 03, 2008

Trapped By Mother Nature


Continuing my outdoor theme from the previous post, I want to share something interesting I discovered about fish in Pamelia Lake. It's about the Cutthroat trout found there. The question was, how did relatives of the salmon family end up isolated in a lake at least one hundred miles from their nearest relatives.

How Did They Get There?

According to the US Forest Service biologists, this species originally swam upstream thousands of years just prior to the last Ice Age. Then, when a huge glacier carved out Pamelia Lake valley, it created a modest-sized lake without an above-the-ground outlet. So, the melting snow pack which drains into Pamelia Lake has to go underground through porous volcanic rock to emerge later some distance from the lake shore and become the headwaters for Pamelia Creek. In the process, Cutthroat trout swimming in the lake have ended up landlocked and trapped without a path back downstream.

Good News or Bad News?

Depending on your point of view, it's both. Being landlocked, the Cutthroat originally had plenty of natural food but only enough for a reasonable population. But now, because of the limited volume of water, the lake is home to a huge population of stunted Cutthroats surviving on what has become a limited supply of food. The good news is that fishing this lake is not unlike shooting fish in a barrel. Plus, the south end of the lake is home to a pair of bald eagles who work very hard trying to keep the fish population under control. Incidentally, they are very happy eagles!

And This Means?

Fish for breakfast, lunch, and dinner for the lucky hiker who happens to know where Pamelia is located and just happens to carry a fly rod. I wonder who that could be?

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