The island of Puerto Rico has a unique and extremely
valuable population of honey bees that is capable of living with the parasitic
Varroa mites. An article in Newsweek,
http://www.newsweek.com/2017/12/29/puerto-rico-hurricane-destruction-doomed-honeybees-750213.html,
describes Puerto Rico’s bees and their severe destruction as a result of the
2017 Hurricane Maria. Puerto Rico’s bees are Africanized Honey Bees which, in
the Americas, have a reputation for being excessively defensive. Puerto Rico’s
AHBs are by contrast relatively gentle in nature. Africanized Honey Bees occurred
as a result of African honey bees being brought to Brazil in an effort to
improve the genetics of Brazil’s bees. Several colonies of African bees escaped
in 1956, and they hybridized with the more-gentle bees of the Americas. The
hybrid bees are more defensive than regular honey bees, which are the same
species. The author calls Africanized Honey Bees “killer bees,” but beekeepers
rarely use this term because honey bees typically only sting to defend their
hive and don’t attack people. Puerto Rico’s Africanized Honey Bees tend to show
aggression toward Varroa mites while not being excessively defensive.
The Newsweek
article explains that Africanized Honey Bees crossed the Caribbean in 1994,
likely by boat, and established colonies in Puerto Rico. These became gentle
bees, not expressing excessive defensiveness to humans. A second important
trait of these new bees is of most importance to beekeepers: They are highly
resistant to Varroa mites. How the changes in behavior happened is unknown.
Genetic mutations may have occurred, or beekeepers on the populous island may
have selected for these desirable bees. Anyway, the bees were struck a terrible
blow, along with the human population, by Hurricane Maria that killed 80 to 90
percent of the bee colonies and decimated their floral forage. Puerto Rican
beekeepers do not want to import new colonies of bees; they would rather expand
their gentle, locally adapted bee colonies. However, the fate of these bees is
uncertain. Today’s photo: bees remove Varroa mites by uncapping and aborting
mite-infected pupae.
--Richard