Featured Research

from universities, journals, and other organizations

Asian carp could establish in Lake Erie with little effect to fishery

Date:
August 7, 2014
Source:
University of Notre Dame
Summary:
If bighead and silver carp were to establish in Lake Erie, local fish biomass is not likely to change beyond observations recorded in the last 3 decades, according to scientists. "Bighead and silver carp will continue to have access to the Great Lakes -- it is important understand what the consequences could be if they were to establish" the paper's lead author said. Since 1995 at least three bighead carp have been recovered from Lake Erie. There is no evidence to date whether bighead or silver carp are established in the lake.

According to a study published in the journal Conservation Biology by a group of scientists from the University of Notre Dame, Resources for the Future, U.S. Forest Service, University of Michigan and the NOAA Great Lakes Environmental Laboratory, if bighead and silver carp were to establish in Lake Erie, local fish biomass is not likely to change beyond observations recorded in the last 3 decades.

Related Articles


"Bighead and silver carp will continue to have access to the Great Lakes -- it is important understand what the consequences could be if they were to establish" Marion Wittmann, the paper's lead author and University of Notre Dame scientist, said. Since 1995 at least three bighead carp have been recovered from Lake Erie. There is no evidence to date whether bighead or silver carp are established in the lake.

The Notre Dame study used expert elicitation, a process of formalizing and quantifying experts' judgments to estimate Asian carp impact to Lake Erie fishery biomass, a method designed by co-author Roger Cooke, senior fellow with Resources for the Future. Federal agencies such as the U.S. EPA, NASA, U.S. Army Corps of Engineers and the U.S. Department of Transportation have successfully used similar expert elicitation in support of risk analysis and decision-making on issues ranging from food safety to radio-active waste management.

Eleven experts estimated that if the carp become established in Lake Erie, bighead and silver carp biomass in Lake Erie could range from close to zero but up to over 25 metric-tons/km2 which is greater than the sum of walleye and yellow perch biomass in Lake Erie.

Experts estimated that Yellow perch biomass would not decrease as a result of bighead and silver carp, and could possibly increase by 15 to 50% of recently recorded biomass for this fish in Lake Erie. Experts estimated that walleye biomass would most likely experience a small decrease of about 10% in Lake Erie. However, experts were uncertain about this value and estimated it is possible that walleye could decrease by as much as 40%, but could also increase by over 60% of its recently measured biomass.

The authors emphasize the importance of decision-makers considering uncertainty.

"The range of possibilities concerning walleye biomass shows that the potential effect to this species is highly uncertain," Cooke said.

"This study uses the knowledge of the foremost Great Lakes and Asian carp experts in the field to help us understand what the impact to Lake Erie fisheries biomass may be" David Lodge, director of the University of Notre Dame's Environmental Change Initiative and co-author, said. "But it does not estimate all the other damages potentially caused by bighead and silver carp such as those that may occur in tributaries of Lake Erie, effects to recreational activities as a result of silver carp jumping behavior."


Story Source:

The above story is based on materials provided by University of Notre Dame. The original article was written by William G. Gilroy. Note: Materials may be edited for content and length.


Journal Reference:

  1. MARION E. WITTMANN, ROGER M. COOKE, JOHN D. ROTHLISBERGER, EDWARD S. RUTHERFORD, HONGYAN ZHANG, DORAN M. MASON, DAVID M. LODGE. Use of Structured Expert Judgment to Forecast Invasions by Bighead and Silver Carp in Lake Erie. Conservation Biology, 2014; DOI: 10.1111/cobi.12369

Cite This Page:

University of Notre Dame. "Asian carp could establish in Lake Erie with little effect to fishery." ScienceDaily. ScienceDaily, 7 August 2014. <www.sciencedaily.com/releases/2014/08/140807121840.htm>.
University of Notre Dame. (2014, August 7). Asian carp could establish in Lake Erie with little effect to fishery. ScienceDaily. Retrieved October 25, 2014 from www.sciencedaily.com/releases/2014/08/140807121840.htm
University of Notre Dame. "Asian carp could establish in Lake Erie with little effect to fishery." ScienceDaily. www.sciencedaily.com/releases/2014/08/140807121840.htm (accessed October 25, 2014).

Share This



More Plants & Animals News

Saturday, October 25, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Deep Sea 'mushroom' Could Be Early Branch on Tree of Life

Deep Sea 'mushroom' Could Be Early Branch on Tree of Life

Reuters - Innovations Video Online (Oct. 24, 2014) Miniature deep sea animals discovered off the Australian coast almost three decades ago are puzzling scientists, who say the organisms have proved impossible to categorise. Academics at the Natural History of Denmark have appealed to the world scientific community for help, saying that further information on Dendrogramma enigmatica and Dendrogramma discoides could answer key evolutionary questions. Jim Drury has more. Video provided by Reuters
Powered by NewsLook.com
Black Bear Cub Goes Sunday Shopping

Black Bear Cub Goes Sunday Shopping

Reuters - Light News Video Online (Oct. 23, 2014) Price check on honey? Bear cub startles Oregon drugstore shoppers. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com
Dances With Wolves in China's Wild West

Dances With Wolves in China's Wild West

AFP (Oct. 23, 2014) One man is on a mission to boost the population of wolves in China's violence-wracked far west. The animal - symbol of the Uighur minority there - is under threat with a massive human resettlement program in the region. Duration: 00:41 Video provided by AFP
Powered by NewsLook.com
Breakfast Debate: To Eat Or Not To Eat?

Breakfast Debate: To Eat Or Not To Eat?

Newsy (Oct. 23, 2014) Conflicting studies published in the same week re-ignited the debate over whether we should be eating breakfast. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins