Study Shows Reproductive Potential Of Chinook Salmon Reduced 24-35 Percent As Returning Fish Younger, Smaller

Adult chinook salmon are returning from the ocean to rivers along North America’s West Coast at younger ages and smaller sizes (about 5 to 8 percent in the Yukon River) since the 1970s. The smaller size is resulting in a drop in reproductive potential for female salmon by 24 to 35 percent, based on total egg mass per female, according to a recent study.

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