Environment & Energy
Related: About this forumLow mortality of Dutch honeybee colonies this winter
Last winter saw the lowest winter mortality of bee colonies for many years. While the loss rate was still around 20% in 2011, it fell below 10% over the last two years and this year was just 6.5%. Winter mortality in the Netherlands is measured by a honeybee surveillance programme conducted by Naturalis and Wageningen UR in partnership with the Dutch Beekeepers Association (NBV).
Bees@wur (Wageningen UR) and NBV together conducted a telephone survey on winter mortality in cooperation with the honeybee surveillance programme commissioned by the Dutch Ministry of Economic Affairs. The study was funded by the government (51%) and the Dutch Crop Protection Association Nefyto (49%). The cooperation of all beekeepers in the sample and survey was essential for the success of the study and for determining winter mortality in bee populations, as well as the factors responsible for this.
Koos Biesmeijer of Naturalis explains that data from over 500 selected beekeepers was assembled in a randomised sample. "The sample was representative of mortality among Dutch beekeeper colonies," adds Sjef van der Steen from Bees@wur. The 534 beekeepers prepared 5919 colonies for winter, of which 5537 survived. This corresponds to a survival rate of around 93.5% and a winter mortality of 6.5%.
Jan Dommerholt, chairman of the Dutch Beekeepers Association, suggests that the 6.5% winter mortality is "natural", that is to say, a level which was normal before the Varroa mite arrived in the Netherlands. Koos Biesmeijer from Naturalis, who coordinates the honey bee surveillance programme, is pleased with the low winter mortality as it is good news for both beekeepers and the pollination by honeybees of fruits and vegetables which are vital to the economy.
Read more at: http://phys.org/news/2016-04-mortality-dutch-honeybee-colonies-winter.html#jCp
Olive Birch
(10 posts)My local beekeeper (here in upstate NY) has reported some uncharacteristic behavior (of his bees as well - haha). I will have to check with him to see how his colonies wintered. Thanks for posting.
mackdaddy
(1,527 posts)sue4e3
(731 posts)Response to mackdaddy (Reply #2)
rjsquirrel This message was self-deleted by its author.
progressoid
(49,992 posts)This is where the bait-and-switch comes into play. Its absolutely true that there were more managed honeybees in the 1940s. Bees were part of the war effort, producing wax used to coat guns and ammunition. So when the war ended, subsidies were introduced to prop up the beekeeping industry.[3] Thanks to Uncle Sams support, bee populations peaked at around 5.5 million in the 1950s, then gradually dropped to around 2.6 million in the mid-1990s.
None of that drop can be attributed to neonics, because they only came on the market in the mid-1990s, and didnt exist in that five decade period of decline.
Now, the national bee numbers did decline at bit around the year 2005 -- to 2.4 million. That was the year in which colony collapse disorder (CCD) struck. The term that describes the unexplained death or disappearance of a hives adult bees.
As USDA puts it, No scientific cause for CCD has been proven.[4] Activists see the lack of a clear cause as a wide-open opportunity to come up with their own explanation. So they blame neonics.
Calmer minds reflecting on the evidence conclude that the CCD phenomenon existed long before the scientists who invented neonics were even born. Indeed, the November 19, 1868 edition of the Louisville Democrat described CCD-like symptoms with the headline: Extraordinary exodus of honey beesThey abandon their winter stores and disappear.[5] Throughout history, CCD has come and gone, and right now, it has gone. There hasnt been a case in four to five years.[6]
Pesticide seed treatments didnt exist in the middle of the 19th century, but disease did ravage hives, just as it does now.[7] The USDA has already identified the primary suspect that has been spreading disease: The parasitic mite Varroa destructor remains the single most detrimental pest of honey bees.[8] This blood-sucking creature latches onto young bees, injecting over a dozen types of debilitating viruses that can devastate entire hives.
http://www.science20.com/news_articles/near_20year_high_beepocalypse_postponed_again_until_2017-169496?utm_source=dlvr.it&utm_medium=facebook
sue4e3
(731 posts)neonicotinoids in the bees diet. I believe the way I do because even though colony collapse disorder existed before neonics did the decline in 2005 did persist in the US and the UK unless articles throughout 2005-2008 was just making stuff up( most of the articles only mentioned neonics as a suspect player) where earlier episodes did not persist. I have a personal friend who is a bee keeper said his honey production wasn't as high and his bees seemed weaker . That isn't cold fact but it was a topic of conversation for quite some time. It lead me to believe that something was making the bees more susceptible to thier regular stresses. So, I say down with the neonicotinoids
progressoid
(49,992 posts)More with links : http://www.science20.com/news_articles/near_20year_high_beepocalypse_postponed_again_until_2017-169496?utm_source=dlvr.it&utm_medium=facebook