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Latest Fish migration Stories

2012-07-25 23:02:44

Atlantic Salmon Federation (ASF) research to determine why significant numbers of migrating salmon leave rivers but so few return to spawn is the focus of a documentary, Atlantic Salmon - Lost at Sea, being produced by the Emmy-winning Irish American film maker Deirdre Brennan of New York City. St. Andrews, NB Canada (PRWEB) July 25, 2012 Research detectives have been at work at the Atlantic Salmon Federation (ASF) first developing the technology and then sleuthing the ocean to find...

2011-12-12 11:20:44

Overfishing in the Mediterranean Sea is felt in North American waters A new model built around biological data from electronic tags, ear bone microchemistry and fisheries catch data for Atlantic bluefin tuna indicates fishing on one side of the Atlantic influences the other side. Bluefin populations on both sides of the Atlantic Ocean have declined precipitously since 1950, according to the study published today in the peer-reviewed online journal PLoS ONE. The model estimates the number...

Image 1 - Changing Environmental Conditions And Predators Affect Survival Of Atlantic Salmon In The Gulf Of Maine
2011-11-19 04:28:27

Stocks of  Atlantic salmon (Salmo salar), which have been steadily declining for the past few decades, are facing  new challenges in the Gulf of Maine, where changing spring wind patterns, warming sea surface temperatures and new predators along altered migration routes are affecting their survival. In a paper published online in the journal Fisheries Management and Ecology, Kevin Friedland and co-authors suggest post-smolts are entering an increasingly warmer coastal ocean,...

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2010-01-10 10:15:00

Case study: Juvenile Salmon Acoustic Telemetry System detected 98 percent of tagged fish A new acoustic telemetry system tracks the migration of juvenile salmon using one-tenth as many fish as comparable methods, suggests a paper published in the January edition of the American Fisheries Society journal Fisheries. The paper also explains how the system is best suited for deep, fast-moving rivers and can detect fish movement in more places than other tracking methods. The Juvenile Salmon...

2009-12-11 08:47:00

PORTLAND, Ore., Dec. 11 /PRNewswire/ -- GEI Consultants, Inc., one of the nation's leading geotechnical, environmental, water resources, and ecological science and engineering firms, announced today that it has been selected by PPL Montana to provide ecological engineering services for the construction of the first full-height fish passage ladder in the United States built specifically for the bull trout, a threatened species. This $7 million precedent-setting ladder project, which is...

2008-12-05 09:41:26

Attempts to avoid dams decrease survival in adult fishScientists have discovered that management efforts intended to assist migrations of salmon and steelhead trout can have unintended consequences for fish populations. Juveniles that are transported downstream on boats can lose the ability to migrate back to their breeding grounds, reducing their survivorship and altering adaptations in the wild.Transportation programs have been in place for over three decades to improve the survival of fish...

2008-10-28 12:30:00

Canadian and U.S. biologists say they have, for the first time, successfully tracked juvenile salmon in both rivers and oceans. The achievement, officials said, was made possible by newly developed miniature tagging and tracking technologies that can follow small salmon over vast distances. "It may have been one of humankind's first ponderings: the fish that got away -- where they come from, where they go and what happens to them in between," said Jim Bolger, executive director of the...

2008-10-02 03:00:25

By Pondella, Daniel J II Froeschke, John T; Wetmore, Lynne S; Miller, Eric; Valle, Charles F; Medeiros, Lea Abstract: The yellowfin croaker, Umbrina roncador Jordan & Gilbert, 1882, is a common nearshore and surf-zone species in the southern California bight. Age was determined for individuals (n = 1,209) using annual increments in otoliths, and size at age was modeled using the von Bertalanffy growth curve (L^sub [infinity]^ = 307.754 mm, k = 0.278 yr^sup -1^, t^sub 0^ = -0.995 yr;...

2008-07-23 06:00:00

By Ad Crable Only a few years ago, it all seemed so promising. American shad, once a prized spring staple of locals' diet and an economic linchpin up and down the Susquehanna, at last seemed headed for a comeback amid a multi-state and federal restoration plan. Visions of again catching the silvery, forked-tail fish, perhaps frying its tasty roe in butter, danced in anglers' heads. Fish lifts or ladders - costing utilities tens of millions of dollars - were in place on all the...

2006-06-26 13:15:00

By Alister Doyle, Environment Correspondent OSLO (Reuters) - Thousands of marine animals could be tracked under a $150 million project to understand threats to life in the oceans with technology perfected for supermarket checkouts, scientists said on Monday. Under the scheme, scientists would implant electronic tags into creatures such as salmon, tuna, sharks, sturgeon, penguins or polar bears to register their movements via acoustic receivers on the floors of the oceans or via satellite....


Latest Fish migration Reference Libraries

Brown Trout, Salmo trutta
2013-10-15 12:46:40

The Brown Trout (Salmo trutta) is originally a European species of salmonid fish. It includes both purely freshwater populations, referred to Salmo trutta morpha fario and S. trutta morpha lacustris, and anadromous forms referred to as the sea trout, S. trutta morpha trutta. The latter migrates to the oceans for the majority of its life and returns to freshwater only to spawn. The specific handle trutta comes from the Latin trutta, meaning, literally, “trout”. The lacustrine morph of...

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2007-06-24 20:15:53

The Three-Spined Stickleback, Gasterosteus aculeatus, is a fish native to much of northern Europe, northern Asia and North America. It has been introduced into parts of southern and central Europe. Three subspecies that are currently recognized by the IUCN are Gasterosteus aculeatus aculeatus, which is found in most of the species range, and is the subspecies most strictly termed the Three-Spined Stickleback; its common name in England is the Tiddler, although "tittlebat" is also sometimes...

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2007-04-03 00:39:10

The American shad or Atlantic shad, Alosa sapidissima, is a species of anadromous fish in family Clupeidae of order Clupeiformes. The shad is a member of the herring family. Description The American shad is the largest member of the herring family. Shad have silver bodies and a green back, with large scales and a deeply forked tail. The males (or "bucks") are smaller than the female, weighing about 1 to 3 pounds when spawning; females are generally 3 to 8 pounds. Both genders tend to...

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Word of the Day
tesla
  • The unit of magnetic flux density in the International System of Units, equal to the magnitude of the magnetic field vector necessary to produce a force of one newton on a charge of one coulomb moving perpendicular to the direction of the magnetic field vector with a velocity of one meter per second. It is equivalent to one weber per square meter.
This word is named for Nikola Tesla, the inventor, engineer, and futurist.