Featured Research

from universities, journals, and other organizations

A Fishy Change In Diet: McGill Research Shows Fish Eating Junk Food

Date:
September 29, 2004
Source:
McGill University
Summary:
The junk food phenomenon has hit bottom- the bottom of the St. Lawrence River. According to McGill University researchers, some freshwater fish are opting out of their usual diet of insects and crustaceans and dining instead on invasive European quagga mussels: the River's junk food.

The junk food phenomenon has hit bottom- the bottom of the St. Lawrence River. According to McGill University researchers, some freshwater fish are opting out of their usual diet of insects and crustaceans and dining instead on invasive European quagga mussels: the River's junk food. This change may have negative effects on fish growth and may also affect other freshwater animals. Although this research is focused on the St. Lawrence River, this problem may be more wide-spread, affecting other freshwater systems.

Related Articles


"We found mussel shells and whole mussels in the stomachs of nearly 60 percent of the examined fish," says McGill University biologist and lead author Anthony Ricciardi. "This is a concern because mussels are not an adequate nutrition source for the fish. Furthermore, mussels contain toxins, such as PCBs and botulism toxin (food poisoning), which may kill the fish or their predators."

Similar "junk food" diets have had a negative impact on the Great Lakes. In these systems fish that eat quagga mussels are contaminated with the toxins present in the mussels. This in turn, has resulted in the death of more than tens of thousands of fish-eating birds, including common loons, mergansers and gulls.

"We are seeing a ripple affect, whereby one change – the change of a fish's diet, works its way up and affects the food chain," says Ricciardi. "As a result we may see a greater contamination of the fish meant for human consumption. We are hopeful our observations will lead to a greater appreciation of how changes in fish behaviour can affect ecosystem processes"


Story Source:

The above story is based on materials provided by McGill University. Note: Materials may be edited for content and length.


Cite This Page:

McGill University. "A Fishy Change In Diet: McGill Research Shows Fish Eating Junk Food." ScienceDaily. ScienceDaily, 29 September 2004. <www.sciencedaily.com/releases/2004/09/040928101517.htm>.
McGill University. (2004, September 29). A Fishy Change In Diet: McGill Research Shows Fish Eating Junk Food. ScienceDaily. Retrieved April 21, 2015 from www.sciencedaily.com/releases/2004/09/040928101517.htm
McGill University. "A Fishy Change In Diet: McGill Research Shows Fish Eating Junk Food." ScienceDaily. www.sciencedaily.com/releases/2004/09/040928101517.htm (accessed April 21, 2015).

Share This


More From ScienceDaily



More Plants & Animals News

Tuesday, April 21, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Deepwater And Dolphins: The Oil Spill's Impact 5 Years On

Deepwater And Dolphins: The Oil Spill's Impact 5 Years On

Newsy (Apr. 20, 2015) Five years on, the possible environmental impact of the Deepwater Horizon spill includes a sustained die-off of bottlenose dolphins, among others. Video provided by Newsy
Powered by NewsLook.com
Five Years Later, the BP Oil Spill Is Still Taking Its Toll

Five Years Later, the BP Oil Spill Is Still Taking Its Toll

AFP (Apr. 20, 2015) On April 20, 2010, an explosion and fire on the Deepwater Horizon rig in the Gulf of Mexico started the biggest oil spill in US history. BP recently reported the Gulf is recovering well, but scientists paint a different picture. Duration: 02:36 Video provided by AFP
Powered by NewsLook.com
Thai Customs Seize African Elephant Tusks Worth $6 Mn

Thai Customs Seize African Elephant Tusks Worth $6 Mn

AFP (Apr. 20, 2015) Thai customs seize four tonnes of African elephant ivory worth $6 million at a Bangkok port in a container labelled as beans. Duration: 00:47 Video provided by AFP
Powered by NewsLook.com
Un-Bee-Lievable: Bees on the Loose After Washington Truck Crash

Un-Bee-Lievable: Bees on the Loose After Washington Truck Crash

Reuters - US Online Video (Apr. 17, 2015) A truck carrying honey bees overturns near Lynnwood, Washington, spreading boxes of live bees across the highway. Rough Cut (no reporter narration). Video provided by Reuters
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