Sentences with phrase «juvenile salmon in»

Based on the numbers of lice on juvenile salmon in 2015, researchers predicted an additional 9 — 39 per cent decline in returning pink salmon due to the outbreak.

The authors estimate using findings in zooplankton that juvenile salmon in the Strait of Georgia may be ingesting two to seven microplastic particles per day, and returning adult salmon are ingesting up to 91 particles per day.

«We know that chalk streams are very productive and juvenile salmon in these rivers generally migrate to sea after just one year, whereas young salmon in other river types typically leave freshwater at 2 - 3 years.

Not exact matches

A biologist from the National Oceanic and Atmospheric Administration is working on a project to tag juvenile chinook salmon at Big Creek with microchips that are scanned like supermarket bar codes when the little fish pass detectors in the stream.

Fishing for the right size During the summer of 2013, about 700 juvenile salmon implanted with the injectable tag were released in the Snake River in Washington state.

By exploiting natural variations in isotopes of strontiuma constituent of the underlying bedrockamong different watersheds, the scientists were able to deduce where adult salmon spent their juvenile years.

This image shows transient embryonic exposures to crude oil cause lasting reductions in the swimming speed of salmon and herring, months after additional juvenile growth in clean seawater.

Because juvenile salmon, or smolt, leave their freshwater spawning grounds to spend an average of two to three years maturing at sea, the boom in 2001 was right on schedule.

WHALE CLOSE - UP A humpback whale repeatedly gulps juvenile salmon recently released in this quiet cove by a hatchery in southeastern Alaska.

Juvenile salmon sampled off the Northwest Coast in 2017 were especially small and scarce, suggesting that poor feeding conditions off the Columbia River Estuary may remain.

Juvenile salmon that enter the ocean this year amid the gradually improving conditions will not return from the ocean to spawn in the Columbia and other rivers for another two years or more, so fishermen should not expect adult salmon numbers to improve much until then.

«We have shown that the proposed development area supports particularly high abundances of juvenile salmon from more than 40 populations that are harvested in at least 10 First Nations territories throughout the Skeena watershed and beyond.

The sea lice spread to migrating juvenile wild salmon, resulting in the highest numbers of sea lice observed on wild salmon in a decade.

«If they can't find the lanternfish they ate in the Sea of Cortez, they may look at juvenile salmon, as well as herring, sardines and other species that salmon may eat.

Also in 2015, individual salmon farms did not coordinate anti-louse treatments, with some farms delaying treatment until just prior to the time when juvenile salmon migrate past farms.

A humpback whale repeatedly gulps juvenile salmon recently released in this quiet cove by a hatchery in southeastern Alaska.

Biological monitors count juvenile coho salmon and steelhead trout that may be lurking in the existing portion of Redwood Creek.

There was snow, and then suddenly we were in our boats with nets and buckets catching the year's first juvenile salmon.

3 Meningoencephalitis associated with Carnobacterium maltaromaticaum - like bacteria in stranded juvenile salmon sharks (Lamna ditropsis).

«-LSB-...] The nearly 100 % incidence of [meningitis from Carnobacterium maltaromaticum in 18 juvenile salmon sharks stranded along the northern California and Oregon coasts between 2002 and 2007)-RSB- could have also caused «disorientation and confusion, which might lead the sharks to strand inadvertently.»

Each year, billions of captive - bred juvenile salmon are released into rivers in North America, Asia and Europe to give a bump wild populations, but their survival is 10 to 20 times lower than that of wild salmon, notes the study.

It requires BOR to hold some water in reserve in the Klamath River system, to flush into the river in case of a disease outbreak among juvenile salmon.

In spring 2005, above - average ocean temperatures and reduced ocean movement resulted in a 20 to 30 percent drop in juvenile marine salmon populationIn spring 2005, above - average ocean temperatures and reduced ocean movement resulted in a 20 to 30 percent drop in juvenile marine salmon populationin a 20 to 30 percent drop in juvenile marine salmon populationin juvenile marine salmon populations.

The drought of 2001 stranded hundreds of thousands of juvenile salmon due to low flows in the Columbia River and kept them from traveling to the Pacific Ocean.

For example, reductions in seasonal sea ice cover and higher surface temperatures may open up new habitat in polar regions for some important fish species, such as cod, herring, and pollock.128 However, continued presence of cold bottom - water temperatures on the Alaskan continental shelf could limit northward migration into the northern Bering Sea and Chukchi Sea off northwestern Alaska.129, 130 In addition, warming may cause reductions in the abundance of some species, such as pollock, in their current ranges in the Bering Sea131and reduce the health of juvenile sockeye salmon, potentially resulting in decreased overwinter survival.132 If ocean warming continues, it is unlikely that current fishing pressure on pollock can be sustained.133 Higher temperatures are also likely to increase the frequency of early Chinook salmon migrations, making management of the fishery by multiple user groups more challenging.1in seasonal sea ice cover and higher surface temperatures may open up new habitat in polar regions for some important fish species, such as cod, herring, and pollock.128 However, continued presence of cold bottom - water temperatures on the Alaskan continental shelf could limit northward migration into the northern Bering Sea and Chukchi Sea off northwestern Alaska.129, 130 In addition, warming may cause reductions in the abundance of some species, such as pollock, in their current ranges in the Bering Sea131and reduce the health of juvenile sockeye salmon, potentially resulting in decreased overwinter survival.132 If ocean warming continues, it is unlikely that current fishing pressure on pollock can be sustained.133 Higher temperatures are also likely to increase the frequency of early Chinook salmon migrations, making management of the fishery by multiple user groups more challenging.1in polar regions for some important fish species, such as cod, herring, and pollock.128 However, continued presence of cold bottom - water temperatures on the Alaskan continental shelf could limit northward migration into the northern Bering Sea and Chukchi Sea off northwestern Alaska.129, 130 In addition, warming may cause reductions in the abundance of some species, such as pollock, in their current ranges in the Bering Sea131and reduce the health of juvenile sockeye salmon, potentially resulting in decreased overwinter survival.132 If ocean warming continues, it is unlikely that current fishing pressure on pollock can be sustained.133 Higher temperatures are also likely to increase the frequency of early Chinook salmon migrations, making management of the fishery by multiple user groups more challenging.1In addition, warming may cause reductions in the abundance of some species, such as pollock, in their current ranges in the Bering Sea131and reduce the health of juvenile sockeye salmon, potentially resulting in decreased overwinter survival.132 If ocean warming continues, it is unlikely that current fishing pressure on pollock can be sustained.133 Higher temperatures are also likely to increase the frequency of early Chinook salmon migrations, making management of the fishery by multiple user groups more challenging.1in the abundance of some species, such as pollock, in their current ranges in the Bering Sea131and reduce the health of juvenile sockeye salmon, potentially resulting in decreased overwinter survival.132 If ocean warming continues, it is unlikely that current fishing pressure on pollock can be sustained.133 Higher temperatures are also likely to increase the frequency of early Chinook salmon migrations, making management of the fishery by multiple user groups more challenging.1in their current ranges in the Bering Sea131and reduce the health of juvenile sockeye salmon, potentially resulting in decreased overwinter survival.132 If ocean warming continues, it is unlikely that current fishing pressure on pollock can be sustained.133 Higher temperatures are also likely to increase the frequency of early Chinook salmon migrations, making management of the fishery by multiple user groups more challenging.1in the Bering Sea131and reduce the health of juvenile sockeye salmon, potentially resulting in decreased overwinter survival.132 If ocean warming continues, it is unlikely that current fishing pressure on pollock can be sustained.133 Higher temperatures are also likely to increase the frequency of early Chinook salmon migrations, making management of the fishery by multiple user groups more challenging.1in decreased overwinter survival.132 If ocean warming continues, it is unlikely that current fishing pressure on pollock can be sustained.133 Higher temperatures are also likely to increase the frequency of early Chinook salmon migrations, making management of the fishery by multiple user groups more challenging.134

In 2014, about 95 percent of the juvenile winter - run Chinook salmon died because drought conditions made the Sacramento River too warm to sustain them.