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14.07.2016 admin
Researchers have found that genetic diversity, determined by the number of times a queen bee has mated, is crucial to maintaining the health of a honey bee colony. Tarpy took genetic samples from 80 commercial colonies of honey bees (Apis mellifera) in the eastern United States to assess each colony's genetic diversity, which reflects the number of males a colony's queen has mated with. Research shows that honey bee colonies with a queen who has mated more than seven times are almost three times more likely to survive than colonies with queens who have mated less often. The researchers found that colonies where the queen had mated at least seven times were 2.86 times more likely to survive the 10-month working season.
The paper, "Genetic diversity affects colony survivorship in commercial honey bee colonies," was published online this month in the journal Naturwissenschaften. Abstract Honey bee (Apis mellifera) queens mate with unusually high numbers of males (average of approximately 12 drones), although there is much variation among queens.
Researchers in Hawaii and the UK report that the parasitic 'Varroa' mite has caused the Deformed Wing Virus (DWV) to proliferate in honey bee colonies. Scientists at Karolinska Institutet in collaboration with Estonian Competence Centre on Health Technologies have developed a new gene expression analysis method to widen the usage of blood in biomarker discovery and analysis. A team of researchers with the Centre for Biological Diversity, School of Biology, University of St Andrews, in the U.K.
Virtual brains reconstructed from ancient, kiwi-sized primate skulls could help resolve one of the most intriguing evolutionary mysteries: how modern primates developed large brains.

A new scientific study puts the final nail in the coffin of a long-standing theory to explain human's remarkable cognitive abilities: that human evolution involved the selective expansion of the brain's prefrontal cortex. LAMPEDUSA, ITALY - OCTOBER 05: Coffins of some of the African migrants killed in a shipwreck off the Italian coast sit in a hangar at the Lampedusa airport on October 5, 2013 in Lampedusa, Italy. Alps, Aosta Valley, Cobweb Houseleek, Europe, Italian, Italy, July, Monte Rosa Massif, Pennine Alps, Sempervivum arachnoideum subsp.
Though this classic Easter recipe for lamb originated in Rome, it has long since become a national favorite. With a mortar, a knife or an electric grinder, finely grind all of the herbs and spices—including the salt and pepper. Ideally, lamb chops are best grilled on an open coal fire or barbecue, but you can also cook them on the stove in a cast-iron grill or a heavy pan. Specifically, 48 percent of colonies with queens who had mated at least seven times were still alive at the end of the season. One main consequence of such extreme polyandry is an increased diversity of worker genotypes within a colony, which has been shown empirically to confer significant adaptive advantages that result in higher colony productivity and survival.
The search for bodies continues off the coast of Southern Italy as the death toll of African migrants who drowned as they tried to reach the island of Lampedusa is expected to reach over 300 people.
They will be ready very quickly—lamb chops (unlike pork chops) can be served rare or medium-rare, according to your preference.

Department of Agriculture (USDA) shows that genetic diversity is key to survival in honey bee colonies – meaning a colony is less likely to survive if its queen has had a limited number of mates. The researchers then tracked the health of the colonies on an almost monthly basis over the course of 10 months – which is a full working "season" for commercial bee colonies. Moreover, honey bees are the primary insect pollinators used in modern commercial production agriculture, and their populations have been in decline worldwide. The tragedy has brought fresh questions over the thousands of asylum seekers that arrive into Europe by boat each year. Here, we compare the mating frequencies of queens, and therefore, intracolony genetic diversity, in three commercial beekeeping operations to determine how they correlate with various measures of colony health and productivity, particularly the likelihood of queen supersedure and colony survival in functional, intensively managed beehives.
The stark contrast in colony survival based on increased genetic diversity suggests that there are important tangible benefits of increased queen mating number in managed honey bees, although the exact mechanism(s) that govern these benefits have not been fully elucidated.

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