Super-fishes in disguise: Mudminnow worldwide

If ever a group of fishes were in need of a PR makeover, it’s mudminnows. Everything about the name – from undesirable mud to inconsequential minnow says “nothing to see here”. But these unassuming species are veritable Clark Kents of the fish world: small size and mild appearance disguise super-fish able to withstand dangerously low oxygen levels and defend spawning territories...
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Go with the flow: novel methods for establishing flow-ecology relationships

Perhaps the greatest challenge for water managers around the world is maintaining reliable water supplies and healthy river ecosystems.  There can be direct trade-offs between these goals because surface and groundwater extraction and regulation of river flows can lead to dramatic declines in native fish assemblages. This dichotomy has led to the burgeoning field of environmental flows where...
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Flood of opportunities below dams

When author Edward Abbey famously wrote “The Monkey Wrench Gang” in 1975, he was roundly condemned for portraying eco-terrorists plotting to blow up Glen Canyon Dam on the Colorado River. Forty years later, the aging of the world’s dams, coupled with increasing awareness of their environmental costs, has brought dam decommissioning and re-operation to the attention of the scientific community,...
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A global perspective on crayfish invasions

Crayfish, also known as “crawfish”, “mudbugs”, and “crawdads”, are freshwater crustaceans known more for their tasty tail meat than their destructive behaviors. In fact, crayfish are so well liked as a culinary item that two species indigenous to the United States have been introduced to Europe and Asia for aquaculture. Unfortunately, these non-native crayfish escaped the lakes and aquaculture...
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Beavers at work: good for native fish?

Walk along a river down in Arizona or New Mexico and you might see fallen trees, distinctive pencil-shaped gnawed stumps, or even a small dam across the stream – all signs of a beaver at work. Beavers, of course, are famous for their ability to build dams and change their environment; but, although beavers in North America range throughout most of the desert Southwest and into northern Mexico,...
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Keeping the wolf at the gate and the bass in the bag

Smallmouth bass make for a great fight on the line, and long ago home-sick easterners, reminiscent for their favorite sport fish, set out to introduce them in their new homes of the Pacific Northwest. The introduction of smallmouth bass sparked controversy even in the late 19th century. Archives from the Oregonian, the Pacific Northwest’s longest running newspaper, capture both sides of this...
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