Seals and sulking salmon are causing a data problem for Fish & Game

The Alaska Department of Fish and Game has a numbers problem. A statistical bias in the department’s data on the Taku River — conducted via a “mark-recapture” system for decades — means it has been overestimating how many Chinook and sockeye salmon make it up the river to spawn by about 30-40 percent. The statistical bias is now being corrected by new state-of-the-art studies, Fish and Game says, and much of the issue can be chalked up to seal predation. It also doesn’t mean either of the stocks are any worse off than they have been, ADFG says. But fishermen aren’t buying it. >click to read<13:52

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