Farmers can estimate the size of a harvest months in advance by counting the blossoms on their trees. Similarly, salmon fishers can cast an eye into the future by counting spawning fish in a river. Fishery managers are doing that now in the Sacramento River and its tributaries, and what they’re seeing could be a bad sign for next year. … Overall, the unwelcome numbers, mirroring similar figures from last year, are alarming to people who fish, for they portend the possible continuation of the two-year-and-counting statewide ban on salmon fishing, imposed in 2023 following a weak spawning season.