Published in March, a study by USDA’s Agricultural Research Service reached a somewhat obvious but important discovery about trucking bees and how hives manage stress associated with long-distance travel. The study suggests that hives under 10 frames when loaded onto trucks have trouble regulating brood temperature, affecting the development of an entire “generation” of brood and diminishing colony population just before almond bloom begins.
Brood subject to cooler temperatures during pupation “can result in developmental abnormalities when they emerge as adult bees,” suggests researcher Dacotah Melicher. “This could be the cause of smaller colonies failing within a few weeks of being shipped.”
“Hive strength was the greatest predictor of thermal stability during transportation, loss of population after arrival, and long-term colony survival.” In other words, weaker hives are less likely to survive after transportation.
Though the findings may seem obvious, this study uncovers strong evidence that supports what many of us had figured to be true. This is a giant step in the right direction for the beekeeping community, where empirical facts are rare and conflicting theories are common.
If Ian Rapoport reported on bees instead of football, his tweet on this study would no doubt include his iconic catchphrase: Big if true. If true, this finding has considerable implications for everyone involved in the pollination chain.
There’s no doubt that thousands of soon-to-be-dead-out hives are loaded onto trucks and shipped out to California each year. Some growers shrug at the idea of paying for a dead hive here and a weak hive there. To some, that’s just part of the game. In my view, if you’re worried you pay too much for pollination, you should also be worried that 100% of your workforce isn’t clocked in.
Everybody benefits from fewer dead outs among the almonds in February. Beekeepers avoid paying a hefty sum to ship empty boxes round-trip. Growers enjoy having a full-strength workforce that cost them a pretty penny to hire. If 5% of all hives fail to survive the trip to California, growers spend roughly $19 million each year on non-viable hives. Similarly, beekeepers dish out millions to truck those hives back and forth.
These inefficiencies in the pollination market make everyone, including the end consumer, worse off. The total cost to produce an almond is inflated. Growers rent 2+ hives per acre to insure against the risk of poor weather during pollination—but look at what happened this year. The weather in February was remarkably crappy, and yet many growers are reporting an excellent nut set.
I want to point out that this study is rather limited—it only examines 10 hives on a single truckload traveling from North Dakota to California. There are tons of variables like place of origin, route selection, travel distance and weather that weren’t tested. I’d like to see this study repeated on a larger scale to see how these variables come into play. Still, this study moves the needle towards a better understanding of the dynamics at play with trucking bees.