Sentences with phrase «by spawning salmon»

Not exact matches

By the time Pacific salmon close in on their spawning grounds, they are senescent and naturally immunosuppressed.

Much as migrating birds or spawning insects rely on the timing of spring so that there is enough available food when they arrive in a given region, so, too, the salmon rely on the timing of phytoplankton blooms, followed by the zooplankton bloom that then feeds baby salmon.

Every summer, sockeye also spawn by the hundreds of thousands here, and an excess of salmon eggs is left floating in the rivers or collecting in clusters along the bank.

Sockeye salmon that sprint to spawning grounds through fast - moving waters may be at risk, suggests new research by University of British Columbia scientists.

There, the bone fragments of large salmon, migrating from marine water to their freshwater spawning places, were found in the Middle Palaeolithic archaeological layers, dated to around 42 to 48,000 years ago, and probably deposited by Neandertals.

Newly published research co-authored by scientists at Simon Fraser University and the Raincoast Conservation Foundation shows juvenile coho salmon benefit from dining on the distant remains of their spawning pink and chum cousins.

By learning more about the relationships among salmon abundance and bear population dynamics, Darimont hopes to be able to determine whether there is a threshold of the spawning salmon biomass that would prevent the coastal grizzly bear population from declining.

Another benefit of Kamchatka's isolation is protection for populations of chum, sockeye, chinook, coho and pink salmon, which return by the millions to spawn in Kamchatka's rivers.

By erecting thirty thousand dams of significant size across the American West, they dewatered countless rivers, wiped out millions of acres of riparian habitat, shut off many thousands of river miles of salmon habitat, silted over spawning beds, poisoned return flows with agricultural chemicals, set the plague of livestock loose on the arid land — in a nutshell they made it close to impossible for numerous native species to survive.

By temporarily raising wild salmon in captivity and then releasing them to spawn, the project attempts to circumvent this mortality rate — while minimizing interference with Mother Nature's processes.

Trails go in and out of the cool cover of the natural forest by the beach giving you the best possible hiking experience with beach and forest ground to cover a nice afternoon with can be spent with company out on the creek watching the salmon spawn at the right time of year or photographing the rare a beautiful flowers and mosses that line the rugged trails of Fillongley Provincial Park.

By November, almost all of the salmon have spawned and died, most of the bears have left the Brooks River to find a denning site, and the waters of the park begin to freeze under increasingly colder temperatures.

In 1978, through presidential proclamation, President Carter expanded Katmai National Monument by 1.3 million acres to protect «a viable gene pool population of the Alaska brown bear... headwaters of the drainages which provide the spawning grounds for red salmon... and the unique subsistence culture of the local residents.

Jimmy Carter In 1978, through presidential proclamation, President Carter expanded Katmai National Monument by 1.3 million acres to protect «a viable gene pool population of the Alaska brown bear... headwaters of the drainages which provide the spawning grounds for red salmon... and the unique subsistence culture of the local residents.

Our kayaking basecamp is nestled in the ancient Tongass rainforest near an old trapper's cabin by a salmon - spawning stream.

So from the conservationist point of view, the proposed legislation cuts the acreage protected from logging by 1/2, not to mention that the logging regime on the other half would be very intense and detrimental to salmon spawning habitat as well as forest species, etc etc..

Atlantic salmon in north - west England will be affected negatively by climate change because suitable flow depths during spawning time (which now occur all the time) will, under the SRES A2 scenario, only exist for 94 % of the time in the 2080s (Walsh and Kilsby, 2007).

Historically, the Frank Church / River of No Return Wilderness was a refuge for spawning salmon but today this area remains blocked by three downstream dams.