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Articles on Fish

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Rising temperatures are not just directly lethal to fish but also result in hormonal imbalances which threaten entire populations. (Jonathan Munera L.)

How climate change-induced stress is altering fish hormones — with huge repercussions for reproduction

Climate change is causing higher levels of stress in fish, and the resulting hormonal imbalances are fundamentally altering entire populations.
Fly-fishing in Alaska’s Tongass National Forest. Joseph/Flickr

What social change movements can learn from fly fishing: The value of a care-focused message

Founded in 1959, the membership group Trout Unlimited has changed the culture of fly-fishing and mobilized members to support conservation. Could its approach work for other social problems?
Water spills over the Copco 1 Dam on the Klamath River near Hornbrook, Calif. AP Photo/Gillian Flaccus

Removing dams from the Klamath River is a step toward justice for Native Americans in Northern California

The largest dam removal project is moving forward on the Klamath River in California and Oregon. Tribal nations there have fought for decades to protect native fish runs and the ecology of the river.
A highway loops around a tailings pond at the Syncrude facility in Fort McMurray, Alta. The proximity of such toxic wastewater ponds to nature threatens its biodiversity. THE CANADIAN PRESS/Jeff McIntosh

As Alberta’s oilsands continue leaking toxic wastewater, aquatic wildlife face new risks

As toxic water continues to spill from tailings ponds across mining developments, decades of scientific research provides evidence of how wildlife will be affected.
Nematode larvae belonging to the genus Anisakis can cause the disease anisakiasis, a threat to human health. Shutterstock / WH_Pics

How to be sushi smart: tips on avoiding anisakis disease

Raw seafood dishes such as sushi, poke bowls and ceviche are increasingly popular, but can harbour fish-borne parasites. What’s the best way to protect ourselves?
Establishing the financial worth of a river’s fish is complicated when many people don’t sell the fish they catch. Tang Chhin Sothy/AFP via Getty Images

How much is the world’s most productive river worth? Here’s how experts estimate the value of nature

Putting a dollar value on nature has staunch opponents who say it’s morally wrong, but without it, building dams and other infrastructure can run roughshod over vital ecosystems.

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