Hotter water linked to poor sockeye returns

Discussion in 'Conservation, Fishery Politics and Management.' started by wildmanyeah, Feb 2, 2018.

  1. wildmanyeah

    wildmanyeah Well-Known Member

    This seems even more relevant today then it did over 20 years ago! Fish farms tho lets spend all our efforts on fish farms!! pffttt \

    The looming question then becomes, are salmon destined for near extinction levels in southern waters?

    "In a paper published in the Canadian Journal of Fisheries and Aquatic Sciences in 1995, Hinch and his colleagues stated that warm sea temperatures could impair production of plankton—organisms that start the food chain in the ocean—triggering a series of consequences.

    “Assuming that growth rate is related to survivorship in the ocean, and it should be, then, yeah, it suggested that fewer adults may come back and they would be smaller,” Hinch said. “And it also carried the logic further out of the ocean into the river and said that smaller adults, those with lower energy, should have a more difficult time completing the river migration.”"

    Acidic oceans and warm rivers that kill Idaho’s salmon might be norm in 50 years

    "Climate modelers at the University of Washington’s Climate Impacts Group predict that the Pacific Northwest’s average annual temperatures will rise a total of 4 to 6 degrees Fahrenheit by 2050. High estimates suggest the increase could exceed 8 degrees, said Joe Casola, the group’s deputy director."

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