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SALMON MIGRATION
Washington used 1 pneumatic fish cannon to solve salmon passage past a 60m hydroelectric dam; the result transformed blocked rivers into thriving spawning groundsWashington used 1 pneumatic fish cannon to solve salmon passage past a 60m hydroelectric dam, using a pneumatic tube system to move migrati...- In 2024, four dams were removed from an American river. Over 400 miles of Salmon habitat reopened. Scientists are now watching an ecosystem rebuilding itselfFour hydroelectric dams on the Klamath River were removed in 2024. This project opened over 400 miles of historic salmon habitat. Indigenou...
- The U.S. Army Corps of Engineers spent $7 million on fish ladders in 1938 to move salmon past Bonneville Dam; decades later, the system carries 1 million a season in good yearsThe Bonneville Dam’s fish ladders, designed as part of a New Deal initiative, remain operational after decades of service. The construction...
- Maryland spent $12 million on a fish lift in 1991 to move American shad past Conowingo Dam; decades later, annual runs remained far below the 2 million-fish targetMaryland invested $12 million in a fish lift to help migrating shad overcome the Conowingo Dam. This technological solution proved ineffect...
- In 1987, Denmark launched restoration of 2,200 hectares around the Skjern River. 19 years later, SPA status arrived in 2006 as wildlife returned to the restored wetlandsDenmark restored the Skjern River wetlands after agricultural decline and pollution. The project re-meandered over twenty kilometers of riv...
- In 1992, Congress authorized the removal of 2 dams that had blocked salmon for a century. 24 years later, the Elwha River once again flowed freely from the Olympic Mountains to the seaElwha River Restoration changed one of America’s most remarkable river recovery stories. Two dams once blocked salmon from reaching upstrea...
- In 2021, scientists tested 20 bonnethead sharks at Florida State and found they use Earth’s magnetic field to navigate: Study suggests sharks may have a magnetic mapSharks possess an incredible ability to roam the expansive oceans, utilizing the Earth's magnetic field as their guide. Recent studies have...
- In 2012, PacifiCorp launched a trap-and-haul program to move adult salmon upstream past Merwin Dam. 14 years later, researchers found 2 stages in the system but 1 decisive bottleneck: young salmon failing to find the artificial current downstreamA trap-and-haul program on Washington’s Lewis River helps adult Chinook salmon bypass Merwin Dam by transporting them in trucks to upstream...
- In 2011, California turned dormant rice fields into winter salmon nurseries; the young fish grew up to eight times faster than in riversFlooded rice fields in California's Yolo Bypass are helping young salmon grow significantly faster. These fields provide a rich food source...
- In 2006, Canada launched a mission to save Atlantic salmon. Nearly 20 years later, the fish are returningAtlantic salmon populations declined due to habitat destruction and overfishing. Conservation efforts involving captive breeding and habita...
- Still storing leftovers in aluminum foil? Doctors warn this everyday kitchen habit could increase metal exposure; here's a list of foods to avoidDo you still store leftovers in aluminum foil? Doctors and medical experts have warned that this everyday kitchen habit, a practice common ...
- A Seattle veteran was told he had four months to live; he began cleaning polluted Hamm Creek, and salmon, beavers and river otters later returnedA Vietnam veteran found a new purpose cleaning a polluted creek near his home. This personal mission extended his life by twenty-seven year...
- In 1948, America built Mud Mountain Dam for flood control; decades later, a $112 million facility was designed to carry 1.2 million fish around it annuallyThe Mud Mountain Dam serves as a crucial flood prevention structure, shielding communities downstream from severe weather. Yet, its constru...
- In 2012 and 2013, Maine removed two hydroelectric dams from the Penobscot River; river herring later rose from almost zero to more than six millionMaine's Penobscot River shows a remarkable environmental recovery after dam removals. Millions of river herring have returned to the waterw...
- In 1942, America completed Friant Dam and diverted most of the San Joaquin River into farms; a salmon run once numbering nearly 50,000 adults collapsedFriant Dam construction in California significantly altered the San Joaquin River's flow. This action disconnected salmon from their spawni...
- In 2011, the US began tearing down two century-old dams on Washington's Elwha River, the largest dam removal in US history at the time, freeing over 20 million cubic yards of trapped sedimentThe Elwha River dams were dismantled after nearly a century of operation. This significant engineering project restored over ninety miles o...
- Scientists have discovered that cocaine-powered super salmon live longer and swim faster than normal salmonScientists found Atlantic salmon exposed to cocaine swam further and lived longer. This study highlights how drugs in waterways change aqua...
- Why Hundreds of Bald Eagles Flock to Frozen Mountains in WinterHundreds of Bald Eagles gather in Alaska, British Columbia, and the northwestern United States during winter. This behaviour is driven by f...
- Salmon on sedatives: How human meds are making wild fish swim faster — But at what cost?A new study reveals a strange impact on Atlantic salmon. Human drugs in rivers are making them swim faster. Scientists found sleeping pills...
- Warming rivers in US West killing fish, imperiling industryHundreds of thousands of young salmon are dying in Northern California's Klamath River as low water levels brought about by drought allow a...
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