No sex for all-girl fish species

No sex for all-girl fish species

Source: bbc

4/23/2008

A fish species, which is all female, has survived for 70,000 years without reproducing sexually, experts believe.

Scientists from the University of Edinburgh think the Amazon Molly may be employing special genetic survival "tricks" to avoid becoming extinct.

The species, found in Texas and Mexico, interacts with males of other species to trigger its reproduction process.

The offspring are clones of their mother and do not inherit any of the male's DNA.

Typically, when creatures reproduce asexually, harmful changes creep into their genes over many generations.

The species will eventually have problems reproducing and can often fall victim to extinction.

Scientists at Edinburgh University have been studying complex mathematical models on a highly powerful computing system to look at the case of the Amazon Molly.

Researchers calculated the time to extinction for the fish based on modelling genetic changes over many thousands of generations.

Continue...

News Id		Source	Stamp	country
2476	Okanagan First Nation fishery celebrates record return of sockeye salmon	msn	2022-09-04	CA
2477	AI-enabled fish gate filters invasive salmon out of Norwegian waterways	newatlas	2022-08-26	NO
2478	Poles hold “marches of mourning” for poisoned Oder river while anglers mobilise to save fish	notesfrompoland	2022-08-23	PL
2479	One of the World’s Rarest Fish Swims Upside Down While Hunting	fieldandstream	2022-08-25	DM
2480	US army builds electric barrier of death to stop rampaging fish destroying Great Lakes	dailystar	2022-08-26	US
2481	A pair of crocodile gars in Ruzhou, Henan, watched by millions of netizens for nearly a month	breakinglatest	2022-08-27	CN
2482	Dead fish and depression on the banks of Poland’s Oder River	AFP	2022-08-27	PL
2483	Novel tech helps detect roundworms in fish fillets	The Fish Site	2022-09-03	US
2484	Turning invasive copi into live feed for yellow perch	The Fish Site	2022-09-01	US
2485	China delivers world's first 100,000-tonne 'mobile fish farm'	cgtn	2022-05-20	CN
2486	How new ocean buoys improve fish farming in S. China's Quanzhou	cgtn	2022-08-14	CN
2487	Fish chock-full of natural 'antifreeze' protein found in iceberg off Greenland	thenationalnews	2022-08-16	US
2488	Hundreds of fish killed when Upstate lake accidentally drained	counton2	2022-08-16	US
2489	Why expert predicts mass fish kills will increase across Australia	9news	2022-08-18	AU
2490	Fuel leaks into Little Paddle River after bridge collapses near Mayerthorpe	Global News	2020-05-12	CA
2491	Atlantic hagfish: A slimy ‘nightmare’ of a fish that feeds on the dead	sea coast online	2022-08-18	US
2492	Dutch anglers save fish as Rhine drought bites	global times	2022-08-18	NL
2493	Second court challenge to kill fish in Miramichi Lake	CBC News	2022-08-18	CA
2494	This monster Idaho fish was more than just a record. It was an unexpected species	idahostatesman	2022-08-19	US
2495	На реку за окунями	Охотники.ру	2022-08-31	RU
2496	Dead Fish in San Francisco Bay Area Blamed on Toxic Red Tide	Associated Press	2022-08-31	US
2497	Investing in the genetics of Scotland's trout sector	The Fish Site	2022-08-31	UK
2498	Climate-Endangered Arctic Epishelf Lake Harbors Viral Assemblages with Distinct Genetic Repertoires	journals.asm.org	2022-08-25	CA
2499	Arkansas Game and Fish reports two giant catfish caught in Lake Conway	arktimes	2022-08-15	US
2500	Teenage vandals cause major damage, attempt to poison koi fish at Salt Lake Cactus & Tropicals	Fox News	2022-08-14	US