New study shows inbreeding in winter flounder in Long Island's bays

Jul 24, 2013
New study shows inbreeding in winter flounder in Long Island's bays
Inbreeding in marine fish, such as winter flounder, historically, has not been a serious concern because of their ability to move through larger areas to find mates and their much larger population sizes has made it unlikely they would spawn with relatives. Credit: Jerry Prezioso, NOAA

Research conducted in six bays of Long Island, NY, and led by scientists from the School of Marine and Atmospheric Sciences at Stony Brook University (SBU) showed that local populations of winter flounder are inbred, which is a situation that is not usually considered in marine fisheries management. The scientists also determined that the effective number of breeders in each bay was below 500 fish, suggesting that the spawning populations of this historically common fish are now relatively small in the area.

"Severe and small effective number of breeders in a formerly abundant marine fish," was published online in the journal PLOS ONE, and is one of the first studies indicating the occurrence of inbreeding in a marine fish. The scientists extracted genomic DNA from the fins of 267 young of the year winter flounder caught over a period of several months in 2010 and 2011, and used 11 polymorphic microsatellite loci (molecular markers) to test for .

"While documented to occur in , inbreeding in marine fish is generally not a serious concern because of their perceived ability to move through larger areas to find mates and, historically anyway, their much larger population sizes making it unlikely they would spawn with relatives," said Shannon O'Leary, lead author and doctoral student at SBU. "Our research suggests that the possibility of inbreeding should be considered in the management of some commercially and recreationally exploited marine fish."

Inbreeding has been linked to lower survival and reproductive rates as well as lower resistance to disease and environmental stress, which could directly contribute to the failure of to recover from exploitation. However, since inbreeding has not been considered likely in marine fish, current fisheries management practices have been developed without incorporating its associated risks.

New study shows inbreeding in winter flounder in Long Island's bays
The research team extracted genomic DNA from the fins of 267 young of the year winter flounder caught over a period of several months in 2010 and 2011, and used 11 polymorphic microsatellite loci (molecular markers) to test for genetic diversity. Credit: NOAA

"We are just beginning to realize that frequently exist as a series of smaller subpopulations as opposed to one large, well-mixed and widely distributed population," said Dr. Demian Chapman, leader of the research team, who is an assistant professor in the School of Marine and Atmospheric Science and assistant director for science at the Institute for Ocean Conservation Science at SBU. "The evidence of inbreeding we have found supports this new paradigm. The number of effective breeders in each bay is also alarmingly low and argues for strong fisheries management and habitat restoration initiatives to rebuild winter flounder populations in Long Island bays."

Explore further: Study shows depleted fish stocks can come back from the brink

More information: www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0066126

Journal reference: PLoS ONE search and more info website

Provided by Institute for Ocean Conservation Science

not rated yet
add to favorites email to friend print save as pdf

Related Stories

Plastic for dinner? Big fish eat more than you expect

Jul 24, 2013

Large, predatory fishes from the offshore waters around Hawai'i have been ingesting a surprisingly large amount of plastic and other marine debris, according to new research by scientists at the University ...

Boat noise stops fish finding home

Jun 28, 2013

(Phys.org) —Boat noise disrupts orientation behaviour in larval coral reef fish, according to new research from the Universities of Bristol, Exeter and Liège. Reef fish are normally attracted by reef sound ...

Community power 'can rescue failing fish stocks'

Apr 01, 2013

Traditional community-run marine reserves and fisheries can play a big role in helping to restore and maintain fish numbers in stressed developing nations' coral reef fisheries.

Recommended for you

Sharks contain more pollutants than polar bears

20 hours ago

The polar bear is known for having alarmingly high concentrations of PCB and other pollutants. But researchers have discovered that Greenland sharks store even more of these contaminants in their bodies.

Moth study suggests hidden climate change impacts

Apr 15, 2014

A 32-year study of subarctic forest moths in Finnish Lapland suggests that scientists may be underestimating the impacts of climate change on animals and plants because much of the harm is hidden from view.

User comments : 0

More news stories

Patent talk: Google sharpens contact lens vision

(Phys.org) —A report from Patent Bolt brings us one step closer to what Google may have in mind in developing smart contact lenses. According to the discussion Google is interested in the concept of contact ...

Wireless industry makes anti-theft commitment

A trade group for wireless providers said Tuesday that the biggest mobile device manufacturers and carriers will soon put anti-theft tools on the gadgets to try to deter rampant smartphone theft.