 |
|
Invasives threaten salmon in Pacific Northwest
March 02, 2009Survey of non-indigenous species finds they may outrank established dangers
Many native fishes in the Pacific Northwest are threatened or endangered, notably salmonids, and hundreds of millions of dollars are expended annually on researching their populations and on amelioration efforts. Most of the attention and funding have been directed toward to the impacts of habitat alteration, hatcheries, harvest, and the hydrosystem-the "all H's." A study published in the March 2009 issue of BioScience concludes, however, that nonindigenous species, notably invasive fishes, appear to pose at least as much of a threat to native salmonids as the all H's, principally through predation.
The study, by Beth L. Sanderson of the Northwest Fisheries Science Center in Seattle, Washington and two colleagues, made use of a spatially explicit database that identified the presence of invasive species in roughly 1800-square-kilometer, hydrologically connected areas throughout Washington, Oregon, and Idaho. The number of invasive species in each area ranged between 86 and 486, the majority being plants and fish.
Sanderson and colleagues assembled reports of predation by six nonindigenous fish species: catfish, black and white crappie, largemouth bass, smallmouth bass, walleye, and yellow perch. Hundreds of thousands to millions of juvenile salmonids were being consumed by these species at just a handful of sites, and for some of the species, salmonids constituted a large fraction of their diet. Yet despite the clear evidence of a substantial impact of invasive species on economically important salmonids, only a very small percentage of research funding is devoted to the potential harms to salmon resulting from invasives.
American Institute of Biological Sciences
Sanderson and colleagues assembled reports of predation by six nonindigenous fish species: catfish, black and white crappie, largemouth bass, smallmouth bass, walleye, and yellow perch. Hundreds of thousands to millions of juvenile salmonids were being consumed by these species at just a handful of sites, and for some of the species, salmonids constituted a large fraction of their diet. Yet despite the clear evidence of a substantial impact of invasive species on economically important salmonids, only a very small percentage of research funding is devoted to the potential harms to salmon resulting from invasives.
American Institute of Biological Sciences
Salmon Current Events and Salmon News RSSTags reveal white sharks have neighborhoods in the north Pacific, say Stanford researchers
The white shark may be the ultimate loner of the ocean, cruising thousands of miles in a solitary trek, but a team of researchers has discovered that the sharks have maintained such a consistent pattern of migration that over tens of thousands of years the white sharks in the northeastern Pacific Ocean have separated themselves into a population genetically distinct from sharks elsewhere in the world.
Living, Meandering River Constructed
In a feat of reverse-engineering, Christian Braudrick of University of California at Berkeley and three coauthors have successfully built and maintained a scale model of a living meandering gravel-bed river in the lab.
A new chemical method for distinguishing between farmed and wild salmon
Wild salmon and farmed salmon can now be distinguished from each other by a technique that examines the chemistry of their scales.
Northern brown bears discovered feeding on whitefish runs
The discovery of brown (grizzly) bears feeding on migrating broad whitefish in a stream in Mackenzie Delta region of the Northwest Territories has researchers advising increased care in petroleum extraction and infrastructure development within the area.
Bugs in Boxes Shed Light on Biological Invasions
Bugs in boxes are helping UC Davis researcher Alan Hastings improve scientific tools used to predict the spread of invasive plants and animals.
Salmon migration mystery explored on Idaho's Clearwater River
Temperature differences and slow-moving water at the confluence of the Clearwater and Snake rivers in Idaho might delay the migration of threatened juvenile salmon and allow them to grow larger before reaching the Pacific Ocean.
Northwestern United States could face more tamarisk invasion by century's end
If the future warming trends that scientists have projected are realized, one of the country's most aggressive exotic plants will have the potential to invade more U.S. land area, according to a new study published in the current issue of the journal Invasive Plant Science and Management.
Widespread Occurrence of Intersex Bass Found in U.S. Rivers
Intersex in smallmouth and largemouth basses is widespread in numerous river basins throughout the United States is the major finding of the most comprehensive and large-scale evaluation of the condition, according to U.S. Geological Survey (USGS) research published online in Aquatic Toxicology.
River flow and temperature limit trout numbers
Over a 23-year study, Javier Lobon-Cervia has found the mechanism that controls the number of salmonids found each year in Cantabrian rivers.
Half of the fish consumed globally is now raised on farms, study finds
Aquaculture, once a fledgling industry, now accounts for 50 percent of the fish consumed globally, according to a new report by an international team of researchers. And while the industry is more efficient than ever, it is also putting a significant strain on marine resources by consuming large amounts of feed made from wild fish harvested from the sea, the authors conclude.
More Salmon Current Events and Salmon News Articles
 |
Crown Prince Natural Alaskan Pink Salmon; No Salt Added; 7.5-Ounce Cans (Pack of 12) by Crown Prince Our Alaskan Pink Salmon is packed without added salt under the most stringent of quality standards. These prime cuts of salmon are delicate in flavor, firm in texture and provide an excellent source of protein. They also contain 1.5 grams of omega-3 fatty acids per serving. |
 |
ST. DALFOUR Gourmet On The Go, Ready to Eat Wild Salmon with Vegetables, 6.2 Ounce Tins (Pack of 6) by ST. DALFOUR |
 |
SeaBear Smoked Salmon Trio, 18-Ounce Unit by SeaBear Wild salmon from the pristine icy cold waters of the Pacific Northwest. |
 |
SAFCOL Gourmet on the Go Chunk Salmon Mediterranean Style, 3.5-Ounce Pouches (Pack of 12) by SAFCOL SAFCOL Gourmet on the Go products bring you a captivating taste from the Mediterranean with Chunk Salmon Mediterranean Style. Chunks of salmon smothered in delicious, juicy Mediterranean sauce are sure to surprise your taste buds. SAFCOL Chunk Salmon Mediterranean Style is a low-fat food. |
 |
Salmon: A Cookbook by Diane Morgan (Author), John Ash (Foreword), E. J. Armstrong (Foreword) Diane Morgan is hooked on salmon and it shows. From the deck of a commercial fishing boat in Alaska to the fish farms in Scotland, she has traveled the world on a quest to find out everything there is to know about the world's favorite fresh fish. Learn the difference between wild and farmed salmon, discern among the varieties of species, whether Atlantic, Chinook, Coho, or Sockeye, and discover the heart-healthy benefits of including salmon in the diet. The real catch are the recipes. Salmon Hash, Thai Coconut Soup, Salmon Tacos, and a dramatic yet simple whole roasted version show the incredible versatility of salmon—it's perfect morning, noon, and night. It pairs well with an international array of flavors and can be poached, smoked, baked, or grilled. With tips for storing,... |
 |
-FREE STANDARD SHIPPING!- Alaska Smokehouse JUMBO Smoked Salmon 3 Pack! by Alaska Smokehouse Really hungry for Smoked Salmon but find it too hard to decide which Salmon to select? Then try our new JUMBO three-pack sampler. Now receive 8 ounces of Smoked Salmon Natural Style, 8 ounces of our Pepper Garlic Smoked Salmon, and 8 ounces of Smoked Salmon Sockeye Style instead of the traditional 4 oz packs. Our Smoked Salmon Natural Style is smoked in our traditional Native American brine and characterized by a light pink color, fine texture and mild flavor. Our Smoked Salmon Pepper Garlic Style is soaked in brine that contains a mouthwatering combination of black pepper and garlic and has the same light pink color and fine texture as the Natural Salmon. Our Smoked Salmon Sockeye Style, the best-known Northwest salmon, has exceptionally rich flavor, reddish color and firm texture. For... |
 |
Crown Prince Natural Skinless/Boneless Pacific Pink Salmon; 6-Ounce Cans (Pack of 12) by Crown Prince Skinless & Boneless Pacific Pink Salmon is created from wild caught fish from sustainably harvested salmon fisheries off the Pacific Northwest Coast. Our skinless and boneless salmon is free of all skin and bones. It is an excellent source of protein and contains 235mg of omega-3 fatty acids per serving. |
 |
Kasilof Fish Company Alder Smoked Pacific Salmon, 16 oz by Kasilof Exclusively Wild Alaska Salmon. Contains: 1 - 16 oz (456 g) Smoked Pacific Salmon. This delicious, alder smoked salmon fillet comes fully cooked and ready to serve for parties of one or more! It's all natural and does need any refrigeration until after it's opened. Serve on your favorite crackers or in one of the delicious recipes enclosed. Product of USA. |
 |
SeaBear Ready-to-Eat Sockeye Salmon, 3.5-Ounce Units (Pack of 4) by SeaBear Ready-to-eat. Fully cooked, boneless, skinless wild Sockeye salmon. Pure, natural source of Omega-3 fatty acids. |
 |
Chicken of the Sea Smoked Pacific Salmon Fillet, 3-Ounce Pouches (Pack of 12) by Chicken of the Sea |
| © 2009 BrightSurf.com |