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New study shows probiotics help fish grow up faster and healthier
Date:12/3/2012

BALTIMORE, MD (December 3, 2012) Probiotics like those found in yogurt are not only good for people--they are also good for fish. A new study by scientists at the Institute of Marine and Environmental Technology found that feeding probiotics to baby zebrafish accelerated their development and increased their chances of survival into adulthood.

This research could help increase the success of raising rare ornamental fish to adulthood. It also has implications for aquaculture, since accelerating the development of fish larvae--the toughest time for survival--could mean a more efficient and safe system for bringing fish to the dinner table.

Tiny zebrafish are often used in genetic research because scientists can easily track changes in their development and the fish grow quickly. They also share many of the same genes as humans and can be used for studying cellular and physiological processes and their impact on human disease.

"This is really exciting," said Jacques Ravel, a leading genomic scientist studying the role of the human microbiome in health and disease at the University of Maryland School of Medicine Institute for Genome Sciences. "Knowing you can colonize the gut of a zebrafish with a probiotic strain and improve its development becomes an interesting model for us to study the beneficial effect of probiotics in children and adults." He and his colleagues are currently looking into the effect of Lactobacillus rhamnosus probiotics on the gut development of premature infants.

In the zebrafish experiment, researchers added Lactobacillus rhamnosus, a probiotic strain sometimes used in yogurt, to the zebrafish water. The fish drank the probiotic through their gills, and it landed in their gastrointestinal tract, preventing bad bacteria from taking over and promoting growth, including advancing the development of bone, vertebrae, and gonads.

"If you have increased growth and survival from each batch
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Contact: Amy Pelsinsky
apelsinsky@umces.edu
410-313-8808
University of Maryland Center for Environmental Science
Source:Eurekalert  

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