Salmon life stories recorded in strontium

MADISON, Wis.---In work that has implications for sport fisherman, scientists and natural resource agencies, University of Michigan researchers have developed a method that lets them reconstruct the environmental history of individual salmon and identify the juvenile habitat of an adult fish returning from the ocean to spawn.

In research to be presented at the annual meeting of the Ecological Society of America on Aug. 7, U-M researchers Brian Kennedy, Andrea Klaue, and Joel Blum, along with Dartmouth College researcher Carol Folt, have found that the element strontium, relatively common in bedrock beneath streams, accumulates in the bony tissues of Atlantic salmon and leaves a specific chemical signature, depending on the geology of the watershed in which the fish is living. This discovery could reveal whether certain rivers or tributaries produce fish that are more likely to survive their time in the ocean and successfully make the return trip to spawn in the stream where they hatched.

Conventional methods of tracing fish movements involve tagging thousands of juvenile fish in hatcheries with fin clips, dyes, or PIT (passive integrated transponder) tags and then hoping that the tagged fish are among the fraction that get re-caught as returning adults years later. It is a labor-intensive procedure that does not yield as much information as scientists would like. Young fish do not necessarily stay in the streams into which they are released, so the tag on a recaptured adult fish may only indicate where the fish was released as a juvenile, not where it spent most of its life. By taking advantage of the natural variation in strontium isotopes (alternate forms of the element that are present in different watersheds), scientists now can differentiate fish from specific geologic areas without having to use a man-made marker previously attached to a fish.

"It's a natural tag," says Kennedy, a research fellow in the Department of Geologica

Contact: Nancy Ross-Flanigan
University of Michigan

Page: 1 2

Related biology news :

1. Salmonella infects cells and saves itself by altering host membrane lipids
2. Salmonella uses molecular staples to change structure of infected cells
3. Salmon farms pose significant threat to salmon fisheries in the Pacific Northwest, researchers find
4. Vion Demonstrates Readiness Of First Tumor-Targeting Salmonella For Human Testing Against Solid Tumors
5. Improving Salmon Management
6. Salmon Syndrome M74: Cause Still A Mystery
7. Researchers Identify Key Gene That Controls Emergence Of Salmonella
8. Atlantic Salmon Cancer Virus Identified
9. Salmonella Vaccine Now Available For Poultry
10. Alaska Scientists Say Salmon Declines Inevitable
11. DT104 Advice:How To Slow Salmonella Spread

Post Your Comments:

(Date:8/7/2020)... ... August 06, 2020 , ... ... is pleased to announce that Eric Chen and Jessica Wong have joined the ... Management & Strategy, respectively. , Eric Chen heads development efforts for Alucio’s flagship ...
(Date:7/31/2020)... (PRWEB) , ... July 30, 2020 , ... ... prescription digital therapeutics product portfolio with a near term focus on Type 2 ... and pharma commercialization experience across multiple therapeutic areas and classes. As Chief Commercial ...
(Date:7/10/2020)... ... ... Today CJ BIO announced the first in a series of Food Ingredient MasterClass ... is revolutionizing ingredient mixes, nutritional content and flavor profiles across a range of savory ... at11:00 AM (CDT) during SHIFT20, the virtual edition of the IFT Annual Meeting & ...
Breaking Biology News(10 mins):
(Date:8/15/2020)... ... August 13, 2020 , ... ... Inc. 5000 list, the most prestigious ranking of the nation’s fastest-growing private companies. ... American economy’s most dynamic segment—its independent small businesses. Intuit, Zappos, Under Armour, Microsoft, ...
(Date:8/12/2020)... BINGHAM FARMS, Mich. (PRWEB) , ... August 12, ... ... International Consulting Group, Inc. (EMMA International), a global leader in FDA compliance ... ranking of the nation’s fastest-growing private companies. The list represents a unique look ...
(Date:8/3/2020)... , ... August 03, 2020 , ... Introducing Ardent Animal ... transformative growth, , Known as MediVet Biologics since its formation ... The new Ardent Animal Health will build on its base of innovative ...
(Date:7/31/2020)... ... July 29, 2020 , ... ... radar transmitter systems that can be configured to drive Klystrons, TWTs, IOTs, and ... can drive one or two switches in a push-pull configuration; yielding fast fall ...
Breaking Biology Technology:
Cached News: