How do blind cavefish survive their low-oxygen environment?

How do blind cavefish survive their low-oxygen environment?

Source: University of Cincinnati

3/13/2022

How do blind cavefish survive their low-oxygen environment?

Credit: University of Cincinnati

Now researchers at the University of Cincinnati say these incredible fish have an equally remarkable physiology that helps them cope with a low-oxygen environment that would kill other species.

Biologists in UC’s College of Arts and Sciences found that Mexican cavefish produce more hemoglobin through red blood cells that are much larger compared to those of surface-dwelling fish. Hemoglobin helps the body transport oxygen and carbon dioxide between a fish’s cells and organs and its gills.

The study was published in the Nature journal Scientific Reports. It demonstrates how much more there is to learn about animals that have intrigued biologists for 200 years.

“I’ve been fascinated by these fish for a long time,” UC associate professor Joshua Gross said.

Cavefish evolved in caverns around the world. The species UC biologists examined, Astyanax mexicanus, diverged as recently as 20,000 years ago from surface fish still found in nearby streams in Sierra de El Abra, Mexico.

Continue...

News Id		Source	Stamp	country
4051	Are You Eating What You Think You’re Eating?	slate	2013-01-29	US
4052	Landslide blocks Beatton River	alaskahighwaynews	2015-10-19	CA
4053	Shocking developments: Fish and Game plans to electrofish 12,000 rainbow trout from South Fork	postregister	2021-04-15	US
4054	Aboard the Lake Guardian, scientists fish for the story of Lake Ontario	wxxinews	2021-04-13	US
4055	Nearly 30 invasive carp pulled from Mississippi River in herding operation	Star Tribune	2021-04-09	US
4056	Underwater fish tornado	earthsky	2013-01-28	US
4057	Biologists campaign to save fish	Taiwan News	2013-01-28	TW
4058	DNR: Angler Caught Nearly 250 Fish Illegally	minnesota.cbslocal	2013-01-24	US
4059	Teen angler thumbs his nose at critics of his sport	portnews	2013-01-23	US
4060	Gilbert spa owner challenges order stopping fish pedicures	eastvalleytribune	2013-01-14	US
4061	Anglers finally off the hook as scientists settle age-old debate over whether fish feel pain	dailymail	2013-01-12	UK
4062	Colombo's fishy beauty in danger of extinction	emirates247	2013-01-13	LK
4063	Salmon Runs Boom, Go Bust Over Centuries; No 'Signal Of Commercial Fishing' In Trends	Underwatertimes	2013-01-14	US
4064	Search continues for person seen floating in Coquihalla River in Hope	aldergrovestar	2020-07-02	CA
4065	Coquihalla Calling: Dynamite to the rescue for a stranded stock of steelhead	gofishbc	2017-10-13	CA
4066	Eat the Fish enters new business waters due to pandemic	CBC News	2021-03-09	CA
4067	Lake Of The Woods Walleye Population In Dire Straits	fishncanada	2021-04-26	CA
4068	Thompson steelhead trapped at bottom of Bonaparte River fishway	ashcroftcachecreekjournal	2019-04-11	CA
4069	Flood warning issued for Bonaparte River, nearly 200 Cache Creek homes on evacuation alert	radionl	2020-07-04	CA
4070	На больших глубинах обнаружено неожиданное разнообразие жизни	habr	2021-04-28	RU
4071	Wildlife managers use underwater noise, herding techniques to trap invasive carp	spectrumnews1	2021-04-12	US
4072	China awards 91 fishermen for capturing foreign spy devices since 2016	Global Times	2021-04-15	CN
4073	100 fishermen ticketed for catching too many fish or fish of wrong size	nj	2021-04-16	US
4074	Fish farm developers brand loch protesters 'a nest of vipers'	heraldscotland	2013-01-12	UK
4075	Guernsey aquarium thief used fish to win competition	BBC News	2013-01-10	US

162 of [218 - pages.]