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RESERVOIR FISH ECOLOGY
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 sea- In a 1982 US reservoir review, fish and plankton productivity rose after valleys were flooded, then declined as spawning habitat and detritus became less available
- Beginning in 1877, Japan imported California rainbow trout for food and sport fishing; escaped fish later competed with native salmonids and disrupted their spawning grounds
- In 1970s, silver carp were brought to the US for aquaculture. Now the jumping fish threaten a $20 billion Great Lakes industryInvasive silver carp are rapidly approaching the Great Lakes, raising alarm over potential ecological and economic damage. The recent detec...24 Aug, 2026, 07.12 PM IST
- In 2010, researchers tested solar panels with white lines; the modified surfaces were up to 26 times less attractive to polarotactic insectsSolar panels, with their shiny surfaces, can inadvertently attract insects seeking water. This phenomenon leads to ecological harm, disrupt...20 Aug, 2026, 02.20 PM IST
- Earlier this year, Los Angeles made 8 trips to Encino Reservoir searching for one endangered bird; they found none, but 60 wildlife species emerged before a 10-acre solar project moved aheadCity biologists made eight separate field trips to Encino Reservoir searching for one endangered songbird. They found zero Least Bell’s vir...19 Aug, 2026, 06.05 PM IST
- In 2024, managers deliberately cooled the Colorado River to protect the Grand Canyon from invasive smallmouth bass. 2 years later, no bass recruitment had been detected, but the effort cost $19.1 million in replacement powerManagers at Glen Canyon Dam used an unusual strategy to protect native Colorado River fish from invasive smallmouth bass: they deliberately...16 Aug, 2026, 12.46 AM IST
- In 1963, federal engineers completed Glen Canyon Dam in Arizona for water storage and power, which turned the Colorado River colder and disrupted native fish reproductionGlen Canyon Dam altered the Colorado River's temperature and flow significantly. This change negatively affected the endangered humpback ch...11 Aug, 2026, 07.29 PM IST
- California's Tule River tribe had not had beavers on its southern Sierra Nevada lands for decades; now a family of seven is back in the South Fork Tule River watershedIn a historic move, the Tule River Tribe has embraced ancient pictographs to spearhead their beaver restoration project. Reintroducing thes...04 Aug, 2026, 05.54 PM IST
- In 1922, California introduced mosquitofish to eat mosquito larvae; within four years, they were in 30 counties and were later linked to native-species declinesIn 1922, California introduced mosquitofish in hopes of controlling mosquito populations. Although they were initially viewed as a solution...01 Aug, 2026, 05.54 PM IST
- 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...24 Jul, 2026, 06.15 PM IST
- A symphony of spice and sound: Louisiana’s “Year of Outdoors” theme offers local musical treasure trove and culinary experiencesLouisiana offers a soulful experience through its waterways and vibrant music. Travellers can savour memorable dishes and collect small, se...14 Jul, 2026, 05.28 PM IST
- Officials plan to flush thousands of toilets to help refill a Utah lake and generate powerWater managers are releasing massive amounts of water from Flaming Gorge Reservoir to safeguard hydropower production at Lake Powell, which...08 May, 2026, 04.29 PM IST
- Lake Belton water quality concerns spike among residents after discovery of 300 tires; Know what happenedAs the tires appeared in Lake Belton, questions about their origin naturally followed. Various theories and speculations have arisen within...05 Sep, 2023, 07.30 AM IST
- Dams may dry up Ganga, warns ministerial groupRecognizing that the plethora of dams built could almost empty Ganga, an inter-ministerial group has recommended that the projects be re-en...11 Apr, 2013, 09.24 AM IST
- Dams may dry up Ganga, warns ministerial groupAn inter-ministerial group has recommended that the projects in Ganga basin be re-engineered to maintain 30-50% of water flow in the lean p...11 Apr, 2013, 02.50 AM IST
- Fish production in West Bengal may cross 2K metric tons by 2015: AssochamGrowing at compounded annual growth rate of about 5%, fish production in West Bengal may cross 2,000 metric tons mark by 2015 from the curr...06 Nov, 2012, 01.12 PM IST
- Hydel projects pose threat to vegetation, aquatic life in KulluVillagers in Kinnaur have been complaining drying up of traditional water sources, specially streams near under-construction hydel projects...17 Jul, 2012, 04.14 AM IST
- Sarus crane habitat faces threat at Yeshwant SagarAt a time when the population of the Sarus crane is reportedly declining in the country, city’s bird watchers have received another shock. ...13 Jun, 2012, 02.07 AM IST
- Sikkim Environment, bio-diversity in perilThe Comptroller and Auditor General of India has said that the environment and bio-diversity in Sikkim have been threatened by construction...27 Apr, 2010, 07.21 PM IST
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