Winter Survival
This study based in the USA tested the hypothesis that ‘local bees’ would over-winter better than bees from far off locations in different climate zones – they didn’t. They found that the weight of the colony going into winter was a significant determinant of winter survival.
I have serious issues with this study from Penn State. It would take a long post here to explain why I think that. The short version...
I was involved in the first study by Penn State. They established apiaries whose queens came from four groups. Two "southern" stocks, and two "northern stocks. My queens were one of the Northern stocks. In late Autumn of the first year, I was told by the researcher that my bees were the only ones still viable. Then a year or so later, that researcher came to Burlington and spoke to Penn State alumni living in the area. Her graphs clearly showed one of the northern stocks stocks rose to the top. I asked her when the study would be published. She didn't know. I asked her again at Apimondia/Montreal. I reminded her of her previous comments and her presentation in Burlington. "I don't remember ever saying any of that". ????
Then the above study was published. Again four stocks, tow southern and two northern. Well, one of the northern stocks originated in West Virginia...certainly not a northern location. And yet, there is the study showing that only weight before winter was the critical thing effecting winter survival.
I believe that all the stocks used were from commercially reared queens that in no way were either northern or southern. Rather, they were all from typical US stocks that are all basically the same. Queens or queen cells raised in the south and used across the US by beekeepers. Then those Brough into their northern apiaries are really not northern stocks selected for years for their ability to thrive in the north.
I wrote to the author of the new study. I wanted to know the origin of all four stocks. He never replied. I think something is going on here...perhaps a bit of protection for the southern breeders?