Wednesday , August 4 2021

B.C. state researcher. Salmon in warm water – Terrace Standard



An anomaly or new norm, the researchers pay close attention to the warm water in the north-eastern Pacific Ocean and what it means to be salmon.

Over the last two months, high pressure peaks developed in coastal areas of B.C. led to a long summer heat. The stormy season was late and the water was two or three degrees warmer.

Richard Dewey, Ocean Networks Canadian Associate Director of Science and the University of Victoria, paid close attention to the uniseasonably hot spot of 2,000 kilometers, appeared for the first time in autumn 2013 and was more noticeable in the spring of 2014. The researchers invented the word "blob".

"What's happening here is waking up. The atmosphere, the storm and jet currents unite and the winds are more vulnerable in the Gulf, and that's why we do not mix cold water and keep things warm," said Dewey.

Now they are watching carefully. By 2017, oceanographers began to see deep masses deteriorating, but this year is in the northwest and at the Bering Sea.

"Perhaps this is a tendency. Perhaps this is how climate change is reflecting on our yard, but we do not know yet," said Dewey.

Ocean Networks has Canada instruments on the bottom and on the edge of the sea. They did not receive 2014 blob in their sensor a few months later, so the researchers kept track of satellite data and sea surface temperature maps in Alaska's eye.

The effects of salmon

Ocean warming causes the cooling of water.

Sue Grant is a Canadian Canadian Fish and Seafood Program (DFO) Salmon Program. Its role is the integration of salmon and their ecosystems. Oceanographers and clean water researchers see the relationship between blobs and rivers and currents.

"Blob is an oceanographic phenomenon, but it is also in the atmosphere and it also affects the fresh water," said Grant.

Salmon are anadromes with freshwater and sea life stages, with warmer temperatures in both habitats. Grant said the effects of the warmer of 2014 and 2015 on BZK vary between ice creams. and the territory of Yukon.

"The responses are mixed, although some stocks in our southern and northern hemisphere did not do well this year. Fraser Watershed was less than the average survival rate of the decoys last year across different species, and we saw the average survival rate again in Fraser this year There are other examples in the North, "he said.

Grant uses a marathon analogy about icebergs that make 3-5 degree temperatures.

If a marathon is made of 50 degrees, it will not survive as the optimum temperature of 50-60 degrees centimeter is away. The salmon has an optimum temperature and when trying to migrate during the summer stream, it can have a negative impact on migration.

The average temperature of water temperatures also causes nutrients.

During the 2014-2015 period, the ecosystem changed, Alaska's surface layer was weaker in nutrients. Ocean Networks In Canada, cold-breeding species that require a nutrition-rich environment were not common, but there were also hot spots adapted to the basic nutritional conditions of mastery.

"When the salmon is fed on the beach and along the coast, they reached the 2016-17, a bit lower than usual," said Dewey.

"The numbers I've seen can cause these hot conditions to cause smaller fish sizes."

Both Grant and Dewey are saying carefully, but it is far from projections and 2018 cold blood means salmon.

However, they can take data from next years: salmon responses, freshwater and sea warming, and the future of ice creams to see what a future model is and what it means.


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