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Author: Jennifer Forman Orth

Invading your brain since 2002.

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Saturday, July 17, 2004

How Now Brown Trout?

PennState Live has a story about research by Dr. Caleb Tzilkowski that focuses on the potential invasive effects of the brown trout (Salmo trutta levenensis). Dr. Tzilkowski, a researcher at Penn State University, is about halfway through a study to estimate the impact of the repeated stocking of these non-native fish by the Pennsylvania Fish & Boat Commission, in streams throughout the state. He has found some evidence that the brown trout are displacing native trout species, but has also found that the brown trout do not appear to have any direct negative effects on endangered ironcolor shiner (Notropis chalybaeus) populations.


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