Science

In the most recent episode of the Orvis podcast, Tom Rosenbauer sits down to talk about trout DNA with Helen Neville. Helen is the senior scientist with Trout Unlimited, and she shares a wealth of information with listeners about current trout research trends. In particular, you'll hear about how scientists use DNA to determine if a fish has bred with a...

Last week, we reported on a new study from Trout Unlimited that shows definitive proof of hatchery fish having a detrimental impact on wild salmonids across the globe, with the focus specifically on salmon and steelhead. Today, we'll dive into the details to help you understand why hatchery fish are harming wild salmonids, and what this means for the future...

Following on the heels of a recent story where we learned about the impact of hatchery salmon in southeast Alaska, we have another story that shows the harm hatchery fish are doing to wild fish. The folks over at Hatch Magazine have compiled an in-depth story on a study undertaken by Trout Unlimited, U.S. and Canadian universities, and other groups, which...

The Idaho Department of Fish & Game (IDFG) conducted a study last year on the impacts of catch-and-release on trout mortality. While the study was published last summer, it's started making the rounds again on social media, so it's worth bringing to your attention. The study specifically looked at catch-and-release mortality for trout in warm water...

According to a fascinating article by Erin Blakemore in The Washington Post, trout that were stocked into historically barren lakes in Wyoming rapidly evolved to take advantage of their new food sources. The study that Blakemore discusses in her article looks at how cutthroat and golden trout evolved more gill rakers after being stocked in historically...

In this episode of the Orvis podcast, Tom Rosenbauer talks with Dr. Steve Davis about the science behind a new fresh water storage plan in the Everglades. This reservoir should help bolster the fresh water flowing through the Everglades and into estuaries on both coasts of Florida. You can listen to the podcast here.

While it's generally thought of as a sound way to supplement native fish, new research shows that stocking anadromous fish alongside a wild population may negatively impact the wild fish. Chris Hunt has a great write-up on this new research in Hatch Magazine, which you can read here.

Researched published in Anthropocene, and shared on the AFFTA blog, highlights a new study performed by scientists that involved turning a series of lakes into laboratories. The scientists were looking to see if stocking fish or improving habitat led to higher long-term fish numbers. Habitat improvement had a larger impact than stocking fish on improving...

Fly fishing for sharks is a newer trend in saltwater fly fishing, but recreational fishing for sharks has long been a popular pastime. According to this article from Newsweek, however, when sharks are caught and released, their body temperature increases dramatically. This increased body temperature impacts shark behavior, potentially threatening their...

In this recent episode of the Orvis Fly Fishing Podcast, Tom Rosenbauer sits down with Dr. Nelson Ham to chat about how land use and geology impact trout streams. Ham has studied the impact of historical land use practices and geology, and how those factors impact the productivity of a trout stream. Listen to the podcast here.