HOME >> BIOLOGY >> NEWS
Leave it to salmon to leave no stone unturned

Like an armada of small rototillers, female salmon can industriously churn up entire stream beds from end to end, sometimes more than once, using just their tails.

For decades ecologists have believed that salmon nest-digging triggered only local effects. But a University of Washington researcher writes in this month's BioScience journal that the silt, minerals and nutrients that are unleashed have ecosystemwide effects, causing changes in rivers and lakes far from the nests.

From decreasing the amount of algae there is to eat to possibly influencing when aquatic insects emerge, spawning salmon can be extraordinary "environmental engineers," says Jonathan Moore, a UW graduate student in aquatic and fishery sciences.

Ignoring this role can cause missteps in managing salmon runs or attempting to rehabilitate habitat, he says. A major loss in the number of salmon, for example, doesn't just affect future generations of that fish alone.

"In streams with high densities of salmon, the disturbance from spawning impacts virtually all aspects of stream ecology," he says.

The female salmon, of course, isn't concerned about all that. She simply wants to lay her eggs in a nice, gravel-bottom bowl that's free of fine sediments that can smother them.

But consider the efforts of the grand dames of the salmon world, the female chinook or king salmon. The largest females are more than a yard long and tip the scales at 45 pounds or more. The biggest nests are nearly a foot and a half deep and extend up to 17 square yards about the size of two parking-lot stalls. The rims around these craters can be the bane of boaters who, even with boats meant to navigate in shallow waters, can find their vessels grounded.

Smaller species of salmon that spawn at higher densities are capable of even more widespread tilling, according to Moore, who has for six summers worked with sockeye salmon through the UW's Alaska Salmon Program. Using counts of spawning
'"/>

Contact: Sandra Hines
shines@u.washington.edu
206-543-2580
University of Washington
9-Mar-2006


Page: 1 2 3

Related biology news :

1. Flying tip of bees: Leave your legs dangling!
2. New report: Explosive growth changes salmon industry
3. Farmed salmon could become an invasive species in forest streams
4. Special chip provides better picture of salmon health
5. Improvement of the treatments against brucellosis and ovine salmonella
6. Escapee farmed salmon infiltrate fitter wild populations
7. Risk/benefit analysis of farmed versus wild salmon
8. Research on salmonella in the poultry industry may result in safer food for consumers
9. Findings on plummeting salmon populations at 8th World Wilderness Congress
10. Grizzlies and salmon: Too much of a good thing?
11. Divergent life history shapes gene expression in brains of salmon

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:5/21/2019)... (PRWEB) , ... May 21, 2019 , ... Experiential tourism, ... rise in demand over the last several years. And according to a recent ... down anytime soon. In fact, more and more travelers are wanting their journeys ...
(Date:5/21/2019)... ... May 21, 2019 , ... Zer0 ... turned 20 today, and to celebrate launched a new startup package, 0to5 Launch, ... they need – pre-product – to attract talent and investors. , “We launched ...
(Date:5/21/2019)... Wis. (PRWEB) , ... May 20, 2019 , ... The ... recruiting trials in gene and cell therapy throughout the United States. Data curated daily ... in a reader-friendly format. , ASGCT members who volunteered to assist in the development ...
Breaking Biology News(10 mins):
(Date:4/10/2019)... ... , ... After more than three months of renovation, Lajollacooks4u is set to ... appliances and modern lighting and fixtures, and will provide additional workspace for the many ... growth in the demand for our team-building events and cooking classes over the last ...
(Date:4/9/2019)... ... ... Sonny Bar Lisa, or Sonny for short, is a quarter horse that was ... of diagnostics, an MRI was performed which revealed Sonny had torn his left front ... VetStem Regenerative Cell Therapy may be a treatment option for her horse ...
(Date:4/8/2019)... ... April 08, 2019 , ... CallTower, ... announced today the launch of their app integration solution, CT Cloud Unite. ... contact-orientated applications while using CT Cloud Voice and Skype for Business solutions. This ...
(Date:4/8/2019)... AUCKLAND, New Zealand (PRWEB) , ... April 09, ... ... and emerging infectious disease, the innovative non-profit research center Chan Zuckerberg Biohub (CZ ... repertoires. The study of antibody repertoires is part of CZ Biohub’s efforts to ...
Breaking Biology Technology:
Cached News: