A shock of cold water could help control exotic fish in Grand Canyon

A shock of cold water could help control exotic fish in Grand Canyon

Source: Arizona Public Radio

10/14/2022

Credit: USFWS

The Grand Canyon is a haven for native fish. But that’s now threatened by smallmouth bass, an exotic fish that eats native species and has recently escaped through Glen Canyon Dam. Scientists say a shock of cold water released through the dam might help keep their numbers down. KNAU’s Melissa Sevigny spoke with fish biologist Drew Eppehimer about the tradeoffs involved.

Tell me why smallmouth bass are becoming a problem.

So if we look to the Upper Basin, so parts of the river in Colorado and Utah, smallmouth bass have been a problem for years. They’ve been stocked throughout West as a recreational fishery, and they’re a ton of fun to catch, but they often have detrimental consequences for native fish and native ecosystems…. but historically the section of the Colorado River between Lake Powell and Lake Mead has been insulated from that. Because Glen Canyon Dam served as a barrier.

Lake Powell

Bass, Smallmouth

Continue...

News Id		Source	Stamp	country
2326	Thousands of salmon found dead as Canada drought dries out river	theguardian	2022-10-05	CA
2327	Worry, uncertainty felt at Little Campbell Hatchery as lack of rain holds up fish returns	surreynowleader	2022-10-17	CA
2328	Why volunteers scoop thousands of fish out of Alberta irrigation canals each year	msn	2022-10-19	CA
2329	Otters kill over 40 koi & fishes leaving Bukit Timah resident	mothership	2022-10-03	SG
2330	Loons are harassing anglers by stealing fish off their hooks	bangor daily news	2022-10-03	US
2331	Rare all-black fish caught in East Tennessee river	cbs42	2022-10-05	US
2332	Agreement heralds a new chapter in char farming	The Fish Site	2022-10-19	CA
2333	Азарт рыбалки рождает союзников	Охотники.ру	2022-10-19	RU
2334	‘River of fish’ making its way in desert is something you mustn’t miss	odishatv	2022-10-09	IN
2335	Where can the biggest bass be caught in Northeast Tennessee?	wjhl	2022-09-23	US
2336	Woman catches super rare ‘gold’ fish in her backyard pond	nypost	2022-10-07	US
2337	Snail Darter declared officially recovered, ending decades-long conservation effort	wjhl	2022-10-04	US
2338	Florida freediver catches pending world record fish with spear	usatoday	2022-10-05	US
2339	600 dinosaur-like fish to be released into the Tennessee River	newschannel9	2022-10-05	US
2340	Which fish are best to catch when it gets cold in Tennessee?	wjhl	2022-09-30	US
2341	Invasive fish could eradicate Tennessee bass species	wjhl	2022-10-04	US
2342	Scientists Track Eels to Their Ocean Breeding Grounds in World-First	sciencealert	2022-10-19	EU
2343	Yale researchers create a new amphibious turtle robot with shape-shifting limbs	interestingengineering	2022-10-16	US
2344	B.C. First Nations seek action on sturgeon deaths, after court blamed declines on dam	globalnews	2022-10-13	CA
2345	Sambro, N.S., fisher, fish buyer, violated law during unmonitored halibut offloads, judge rules	CBC News	2022-10-13	CA
2346	America's largest trout producer gains ASC certification	The Fish Site	2022-10-13	US
2347	Пришла осень, вода остывает, у рыбы закончилось кормовое изобилие	Охотники.ру	2022-10-06	RU
2348	Low water levels along French river help to reveal medieval fishery	medievalists	2022-10-06	FR
2349	Competitive fishing has a cheating problem, and these Canadian anglers say they've seen it happen	CBC News	2022-10-06	CA
2350	Tiny Fish at Center of 1970s Supreme Court Case Achieves Redemption	cnet	2022-10-06	US