Featured Research

from universities, journals, and other organizations

Better Diets For Farm-Raised Fish Help Lower Pollution

Date:
October 28, 1999
Source:
National Sea Grant College Program
Summary:
While humans grapple with eating leaner meats, less fat and more fruits and vegetables to live healthier lives, scientists have found that designing better diets for farm-raised fish and shrimp may promote a healthier industry by lowering production costs, reducing pollution and enhancing fish growth.

PORT ARANSAS, Texas - While humans grapple with eating leaner meats, less fat and more fruits and vegetables to live healthier lives, scientists have found that designing better diets for farm-raised fish and shrimp may promote a healthier industry by lowering production costs, reducing pollution and enhancing fish growth.

In a project funded by Texas Sea Grant, Drs. Allen Davis and Connie Arnold are studying the nutritional needs of fish and designing diets that provide just enough protein to obtain optimum growth. By developing better-tailored diets and feeding regimes, Allen said, researchers can cut feed costs because farmers will know how much food the fish require. They can also cut pollution because fish excrete less waste when they are fed only what they need, he said.

"The more information we have on nutrition, the more we can optimize how the nutrients are retained by the animal, this not only makes it cost-effective and reduces the pollution load," said Davis, a Sea Grant research scientist at The University of Texas at Austin, Marine Science Institute.

The researchers are also trying to determine the nutrition needs of fish at different points in their life cycles. For example, he said, redfish grow fast, so they need a diet rich in protein very early in their lives. As they grow older, however, they require fewer nutrients, and farmers can turn to the cheaper feeds that contain fewer nutrients.

"A lot of this research is geared towards not only developing the technology and demonstrating that these diets do produce good things, such as fast growth rates, but we're also giving the farmer another option for reducing pollution loads," Davis said.

Well-balanced, protein-rich feeds can reduce the amount of pollutants released into fish ponds by as much as 25 percent, he said. However, these feeds are more expensive than others, and farmers typically go with the cheaper, less nutrient-rich feeds. Farmers may save money in the short-term, Davis said. In the long run, however, they will spend more money on feed because they will have to use more of it. And, he said, they will create more waste.

Already, Texas fish farms are incorporating the diets outlined by Davis and Arnold. Ultimately, the scientists hope to reduce the production costs of shrimp and fish farms while protecting the environment, he said. Protecting the environment is essential to the industry because aquaculture relies on good, quality water.

"In general, pollution from aquaculture is not a major problem, but we want to be proactive as far as maintaining a good environmental perspective," Davis said. "It doesn't do us any good to pollute our own water source. Logically, it makes sense to move towards these lower pollution feeds."


Story Source:

The above story is based on materials provided by National Sea Grant College Program. Note: Materials may be edited for content and length.


Cite This Page:

National Sea Grant College Program. "Better Diets For Farm-Raised Fish Help Lower Pollution." ScienceDaily. ScienceDaily, 28 October 1999. <www.sciencedaily.com/releases/1999/10/991028070416.htm>.
National Sea Grant College Program. (1999, October 28). Better Diets For Farm-Raised Fish Help Lower Pollution. ScienceDaily. Retrieved September 22, 2014 from www.sciencedaily.com/releases/1999/10/991028070416.htm
National Sea Grant College Program. "Better Diets For Farm-Raised Fish Help Lower Pollution." ScienceDaily. www.sciencedaily.com/releases/1999/10/991028070416.htm (accessed September 22, 2014).

Share This



More Plants & Animals News

Monday, September 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Cat Lovers Flock to Los Angeles

Cat Lovers Flock to Los Angeles

AFP (Sep. 22, 2014) The best funny internet cat videos are honoured at LA's Feline Film Festival. Duration: 00:56 Video provided by AFP
Powered by NewsLook.com
Raw: San Diego Zoo Welcomes Cheetah Cubs

Raw: San Diego Zoo Welcomes Cheetah Cubs

AP (Sep. 20, 2014) The San Diego Zoo has welcomed two Cheetah cubs to its Safari Park. The nearly three-week-old female cubs are being hand fed and are receiving around the clock care. (Sept. 20) Video provided by AP
Powered by NewsLook.com
Chocolate Museum Opens in Brussels

Chocolate Museum Opens in Brussels

AFP (Sep. 19, 2014) Considered a "national heritage" in Belgium, chocolate now has a new museum in Brussels. In a former chocolate factory, visitors to the permanent exhibition spaces, workshops and tastings can discover derivatives of the cocoa bean. Duration: 01:00 Video provided by AFP
Powered by NewsLook.com
Top 3 Outrageous Animal Stories Of The Week

Top 3 Outrageous Animal Stories Of The Week

Newsy (Sep. 19, 2014) This week's animal stories include a goldfish having surgery, a pizza chain giving out pets, and a tiger found on the side of the road. 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:
from the past week

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