In 2019 there were three mating periods at the mating station Neeltje Jans. The third period has been added in response to the growing demand for black, Varroa-tolerant queens. A total of 13 beekeepers have placed their mating nucs at Neeltje Jans.
During the entire period of nine weeks there have been eight drone colonies at Neeltje Jans permanently. These had queens that were no sisters of each other. This differs from what is customary at other mating stations, where the drones are descendants of queens that are full sisters of each other. Purpose of DDB is to avoid inbreeding to a maximum.
The mating result is in accordance with the multi-year average of Neeltje Jans.
|Period||# Nucs||# fertilised||Percentage|
|1 (weeks 22,23 and 24)||65||35||54%|
|2 (weeks 25, 26 and 27)||61||34||56%|
|3 (weeks 28, 29 and 30)||47||47||57%|