In drought-stricken California, young Chinook salmon are hitting the road, not the river, to get to the Pacific Ocean. Millions of six-month-old smolts are hitching rides in tanker trucks because California's historic drought has depleted rivers and streams, making the annual migration to the ocean too dangerous for juvenile salmon. "The drought conditions have caused lower flows in the rivers, warmer water temperatures, and the fish that would normally be swimming down the rivers would be very susceptible to predation and thermal stress," explains a fishery biologist with the Fishery Foundation of California.
California has been trucking hatchery-raised salmon for years to bypass river dams and giant pumps that funnel water to Southern California and Central Valley farms. But this year state and federal wildlife agencies are trucking nearly 27 million smolts, about 50% more than normal, because of the drought, according to the California Department of Fish and Wildlife. Trucking the smolts ensures a large number will survive and grow to be the California king salmon prized by fishermen and seafood lovers. But skipping the river journey means the migratory fish won't know how to swim home to spawn in three years. The commercial and recreational fishing industries have been pushing for the expanded trucking program to increase the chances of a decent salmon season in 2016, when the smolts released this year will be adults. (More salmon stories.)
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