BIBBA Monthly – September 2020

BIBBA Monthly – September 2020

BIBBA Monthly – September 2020

BIBBA Monthly September 2020

Welcome to the September Newsletter. I mentioned last month that I’d been receiving mated and virgin queens through the post as part of the NatBIP piloting process. Each batch survived the postal journey from East Sussex to Cheshire and we picked up useful information about posting queens during hot weather, how to prepare for the delivery and how to cope if a delivery appears just with 12 hours notice! The picture shows a typical batch just after delivery. My own bees were also interested in the new arrivals.

Mated and virgin queens through the post
Mated and virgin queens through the post
TABLE of CONTENTS

National Bee Improvement Programme

Webinars - Season Three

Cupkits, Fakes and Annoyance

Conserving Black Bees

The NatBIP programme is continuing onwards. Details on the next round of webinars are in this newsletter – please register so that we can send automatic reminders to you about each webinar. Spaces are limited (to 1,000 attendees maximum) which sounds a lot but we are opening up the webinars for a short while to all beekeepers and spaces are being booked up quickly. We will soon be publishing details and timings of the next major deliverables in the NatBIP programme to help prepare everybody for their next season’s beekeeping.

Karl Colyer

BIBBA Webinars  - The National Bee Improvement Programme (NatBIP)

There is increasing concern amongst beekeepers, both old and new, of the continual rise in the number of honey bee imports. These concerns include:

  • Bee health: The possible introduction of more pests, diseases and other pathogens.
  • Unsuitability to the locality, possibly contributing to increased colony losses.
  • Further hybridisation of the sub-species, making the selection and improvement, of our bees, difficult, and reducing any local adaptation that our bees are developing.

NatBIP has been organised to help and encourage the production of local bees and queens from stock that has shown to do well in the region. With reduced influence from importations we should soon have a population of improving bees that are hardy, healthy and productive, rather than ones unadapted to the area, consuming large quantities of stores and subject to high winter losses.

This webinar programme is being presented by experienced beekeepers, bee farmers and scientists. It has been arranged in a logical progression to explain NatBIP, the experiences of using imported bees and relevant scientific evidence. The webinars aim to show how beekeepers and beekeeping associations can participate in the programme and produce results that will benefit all.

NatBIP provides us with the first ever chance to participate in a scheme to improve our bees and to become self-sufficient and sustainable in our beekeeping, which should lead to a reduction in demand for more imports of bees. It is hoped that as many beekeepers, groups and associations, as possible, will attend these webinars. Please publicise widely, as this programme is appropriate to all beekeepers, teachers and BKA officials.

22nd Sept       "The National Bee Improvement Programme - Outline"  Jo Widdicombe

29th Sept        "More details of the National Bee Improvement Programme and Participation"     Jo Widdicombe

6thOct            “Global pandemics, bee imports and native bees"    Norman Carreck

13th Oct          “My 50 years experiences of imported bees affecting local stock"        Peter Jenkins

20th Oct          “Resilient Honeybees"    Grace McCormack

27th Oct          “Where we are, how we got here and how we can move on……."    Roger Patterson

3rd Nov           “Some Fresh Ideas for Teaching and Learning"    Roger Patterson

10th Nov         “Bees and queens for everyone"   Roger Patterson

17th Nov         “Answering Your Questions"        All Speakers

Cupkit, Fakes and Annoyance

"Cupkit” is a name that is used in the U.K. and Ireland for a cell plug queen rearing system that is designed and manufactured by Nicot in France.  Elsewhere in the world it is called “Cupularve”.  As a system I like it, but I think you need to be raising a reasonable number of queens to justify it being used in the manner intended.  In simple terms, there is a plastic box with holes in that are blocked off by cups.  This replicates a comb, so when a queen is imprisoned in the box by a queen excluder, she lays eggs in the cups.  When done, she is released back into the colony.  The eggs develop into larvae, that are transferred in the cups into a holder when of the right age.  These holders are usually fixed onto a bar in a frame and placed in a colony that is set up to convert them into queen cells.

I use it both as a complete system, and with the cup and holders only, but I graft into them.  Many other beekeepers do the same, preferring them to some of the other dedicated cups that are available.

Fig. 1. Showing cages dropped off the holders in use, so releasing the emerged queens.

Fig. 1. Showing cages dropped off the holders in use, so releasing the emerged queens.

The Nicot-manufactured parts are high quality and everything fits perfectly, including replacement parts.  There are many copies that are made in low-wage countries that are widely available and much cheaper.

There is a great temptation to buy them, and although I should have known better, I bought 100 holders, cups and roller cages.  I assumed that even if they didn’t fit the Nicot, they would all be compatible within the same bag.  Oh no they weren’t!  Some were so loose they fell apart when held vertically, as they would be in use – some wouldn’t even fit.  The lids on some of the cages wouldn’t stay closed when snapped together and some fell off the holders (Fig.1).

Fig. 2. The bar in place to prevent the cages dropping too far

Fig. 2. The bar in place to prevent the cages dropping too far

When raising queens from some colonies I use the cages, allowing the virgins to emerge into them, so I can reject any yellow queens.  It is rather annoying when a cage falls off the holder, releasing the virgin into a queen rearing colony.  It is difficult to keep all the compatible parts together – in use they get mixed up – so, as I don’t like wasting things, I nailed a bar in the frame so that if the cage did fall off it would be restricted and wouldn’t release the queen (Fig. 2).

I have acquired “Cupkit” parts from several sources.  These have meant that I have many poorly fitting parts.  I guess others have too.  The answer is simple.  Use those from the original manufacturer, rather than try to save a little money.

Roger Patterson

Reserve signage, Oban ferry terminal

Reserve signage, Oban ferry terminal

CONSERVING BLACK BEES

(Apis mellifera mellifera) in the Hebrides, Scotland

by ANDREW ABRAHAMS, via the American Bee Journal

Readers might ask, why on earth spend much of a lifetime con­serving what most beekeepers perceive as an aggressive, unproduc­tive race of honey bee — a race per­haps left behind by history? I was fortunate, often by chance rather than grand design, to gather up some pure remnants of Scotland’s native honey bee (Apis mellifera mellifera) in the late 1970s and since then I have managed over decades to improve this popula­tion in the isolation of the remote is­land of Colonsay, which lies 16 miles off the west coast of Scotland (see https://colonsay.org.uk).

In 2013, I was able to convince our Scottish Government to pass the re­quired legislation to help protect this population for future generations.1 Readers might find this an interest­ing story!

Oyster farming took me to the small (ca 12 square miles) island of Colonsay in the late 1970s. I had no experience or interest in beekeeping. This changed on exploring a dilapi­dated barn on a neighbouring farm and finding dozens of old hives and nucleus boxes. Colonsay and the ad­jacent island of Oronsay, connected at low tides, had been used from 1946- 1966 as a queen rearing and breeding station for Black Bees. Joseph Tinsley, then the apiculturalist at the West of Scotland College of Agriculture, and a man well ahead of his time, was greatly concerned by the steady hybridisation of Scotland’s native Blacks, largely by Italian imports. In Scotland there had been no history of stock improvement, or dissemination of selected queens to the many small-scale, local beekeepers. Tinsley’s view was that the best way to compete with foreign imports was firstly to improve and then multiply up locally adapted stocks. Now that has a familiar “Dar­winian” ring to it!

Colonsay and Oronsay gave him isolation and, importantly, enough bee forage throughout the summer months to maintain a large enough population from which to select and improve. He writes, “It is possible to improve the native strain consider­ably.”2 A local farmer, Niall McNeill, was trained in queen rearing. Queens and nucs were sent regularly to the mainland. In 1945, Eva Crane, Direc­tor of the International Bee Research Association in the U.K., recorded in her diary a visit to Colonsay and Oronsay and her interest in find­ing Black Bees on the islands, which were resistant to acarine mites (Acara­pis woodi).3 It is clear that there were many “survivor stocks” from the aca­rine epidemic that had swept across the U.K. in the early 1900s.

During these last two decades there has been a growing momentum to conserve the pure races of Europe’s honey bees.4, 5 Beekeepers and scien­tists have watched with alarm the constant mixing of races, the dilution of inherited traits and the ultimate loss of valuable genetic material. These genetic resources have been derived from millennia of adaptation to specific environmental conditions. Now free trade, competition and con­sumer choice drive the machine! This prevailing attitude has pushed pure races of honey bees to the margins of most European countries. High mountain valleys, large forest parks and remote islands provide the isolat­ed areas required for the protection of locally adapted honey bees. National and local legislation further try to protect these reserves. Slovenia is one rare exception, where nationally all bee imports are banned to maintain pure strains of Carniolan stock.

Today, we still have populations of Blacks in Scotland, some more diluted by foreign imports than others. Many beekeepers see the worth of main­taining and improving their heritage by selecting and raising their own queens. Others would argue that it is easier and cheaper to import from abroad; after all, some think bees are bees are bees!

When asked about the Black Bee, many will repeat what they have read in books and journals: a defensive and aggressive race with low productiv­ity, adapted to the colder, wetter cli­mate of western and northern Europe where it evolved. First brought to the U.S. around 1620 by early settlers from Europe, these Black Bees have long, largely been replaced by imports of Italian, Buckfast and more recently Carniolan bees, and by the invasion of Africanised hybrids. However, four hundred years later, the genetic sig­nature of those early imports is still well embedded in the stocks of wild (unmanaged) colonies living in the

Scottish Native Honey Bee Society gathering for an inspection

Scottish Native Honey Bee Society gathering for an inspection

U.S. Seeley’s genetic analysis of the Arnot Forest survivor stocks, before and after the impact of varroa, show that around 20% of their genomes can be attributed to Apis mellifera mellifera.6

It is worth considering the opinion of a world-renowned bee breeder, Brother Adam of Buckfast. He was full of praise for the U.K.’s native bee: “This dark brown bee was the possessor of quite an extra-ordinary assembly of most valuable economic qualities. … These traits, extreme thrift, ability to fend for herself, lon­gevity, hardiness, wing power and industry, which were such a marked feature of the English (and Scottish!) bee, can hardly be found together in the same concentration in any other race.” He also states clearly that the “acarine epidemic completely wiped out” the old English brown bee.7 Goodness, if he had just come north to Scotland or taken the ferry over to Ire­land, he would have found plenty of “survivor stocks.” I have often won­dered, what might have happened if Brother Adam had turned north and west instead of south and east, when he left the gates of Buckfast “in search of the best strains of bee”? What if he had stuck with and selected from aca­rine survivor stock? Stocks on which to use his incredible breeding skills. Perhaps the warmth of the Mediterra­nean and the sunshine of North Africa were a greater lure to ageing bones, than the grey of the Celtic fringe!

Early Days for a novice beekeeper. However, back to that shed on Colon­say and the empty hives. In the late 1960s Niall McNeill had retired to the neighbouring island of Islay and tak­en Colonsay’s stocks of Blacks with him. I could not find any wild stocks by the late 1970s, but back then I had an inexperienced eye. I was also inex­perienced in many ways for remote living on an island with only three ferries per week and no public water supply or electricity. However, Colon­say’s very resourceful Gaelic commu­nity of around 120 kindly shepherded myself and family around many of life’s pitfalls. Keep away from the “ex­pensive college” was always sound advice, quietly given! With this in mind before starting my beekeeping career, I worked for two summers with a bee farmer running 1,500 hives on the east coast of Scotland. Again, I took sound advice regarding the se­lection of stocks of bees that I was to take out to Colonsay. This came from Bernard Mobus, the apiculturalist at the North of Scotland College of Ag­riculture: Look carefully for native stocks that are able to take the harsh Atlantic weather out on the islands. Mobus had spent many years select­ing and improving his Maud strain of native Blacks in an isolated area north of Aberdeen. A total of 14 colonies, and a further 16 queens from widely differing remote areas of Scotland and two from the Galtee Black Bee Breed­ers in Ireland, became the basis of to­day’s isolated stocks on Colonsay. This population, currently maintained at around 60 colonies, has now been iso­lated for almost 40 years. Geneticists have thoroughly analysed Colonsay’s stocks and found them to be of almost pure M lineage with very little intro­gression of C lineage.8, 9 Stocks are disease-free regarding varroa, AFB, EFB, Nosema apis and Nosema ceranae. Viruses, particularly DWV, are very hard to find with PCR analysis.10

During the ‘80s and ‘90s I was pre­occupied with raising a family and also building a home and work sheds; no houses were available for rental. Life was very much hand to mouth, but beekeeping skills grew quickly. When bees are kept at the edge of their natural range of survival, beekeeping mistakes are quickly punished. Hon­ey sales to a growing tourist market became a welcome additional source of income. Over the decades the bees and their keeper slowly adapted to their Atlantic environment.

Climate. Colonsay sits in line with Labrador and the Hudson Bay at 56 degrees north latitude. However, the warming currents of the Gulf Stream bless the west coast of Scotland and Ireland with mild, if wet, winters. Summer temperatures seldom rise into the 20s centigrade (68 F). Queen mating days (hours!) are at a premium. Wind is a constant, and salt burn from spring and summer Atlantic gales can decimate bee forage at any time.

Colonsay’s Bee Forage. Sheep and cattle grazing greatly influence bee forage. Heathers dominate much of the bare, rocky hills and provide im­portant grazing for sheep in winter and a wonderful honey crop for the bees in autumn. A reduced number of sheep, due to poor prices and farming cutbacks, has seen a return of much enclosed land to scrub — willow, gorse, blackberry and thistle. That old adage “poor farmers raise wealthy beekeepers” holds good. There are good pollen sources for bees throughout the year, from gorse in February right through to heath­ers in August and September. How­ever, cold, wet weather can confine foragers to their hives for weeks. The Blacks’ adaptive trait of storing slabs of excess pollen gathered during good spells keeps queens laying over dearth periods. Interestingly, Tentori­um, a very large Russian producer of bee products, selects and breeds Apis mellifera mellifera strains specifically to exploit this pollen hoarding trait. Bee bread is a much more valuable product than pollen and Tentorium has specialist machinery, incorpo­rating miniature flails that strip the ensiled pollen pellets from brood combs.

Sea Pinks and June’s reflections

Sea Pinks and June’s reflections

Wild flowers abound in the pas­tures, ditches and scrub areas of the island and also in the exotic wood­lands planted out in the sheltered estate gardens. Particular to coastal islands are the sea pinks (Armeria ma­ritima) growing along sheltered tidal shorelines. Also abundant in June are the Machair flowers. The Machair is the “fertile grassy plain” stretching inland from Atlantic beaches, which storm-blown sand helps fertilise ev­ery winter. The machair in bloom in June is a joy for bees and tourists alike. All these wild flowers, includ­ing wild thyme ( Thymus serpyllum) contribute to building and sustaining large bee colonies, which then exploit the late heathers. In good summers there can sometimes be surplus be­fore the heathers. Colonsay’s multi floral honey is highly aromatic and of very high quality. Sadly, I was unable to benefit from Niall McNeill’s skills and his years of experience, as he died very suddenly. However, his words “a difficult crop to produce, boy, but a very easy crop to sell” stuck with me from the beginning.

Management System. Stock num­bers on the islands are dictated by available pollen, especially spring pol­len. Colonies can struggle to build up in late, wet and windy seasons. Eight apiaries widely scattered around the two islands shelter some 60 colonies and their overwintered nucs. Hives are not moved and apiaries have been selected for shelter and bee access to both summer and autumn flows. I am always surprised at how local forag­ing activity can be between the differ­ent apiaries on a small island.

Honey is harvested at the end of the heather flow in September. De­pending on the season, the multi floral spring and summer nectars give about one third to one half of the crop. Heathers usually dominate the mix, but can fail completely some years due to rain. Stocks overwinter on at least 30 lbs. of honey. Wintering on heather honey is not a problem, as mild winters allow plenty of cleans­ing flights. Heather pollens can be vi­tal brood food in March and April, if stocks are unable to forage early.

All queens are marked and clipped in April. Year-old and two-year-old colonies expand into a double brood chamber (British National brood box = 36 litres; Langstroth = 40 litres) and are normally given 2-3 honey su­pers above a queen excluder to con­tain swarming impulse. Queens that are 3-4 years old are held in single brood boxes to produce splits or are Demaree’d to produce queen cells and/or splits. These older stocks often produce supersedure cells. Normally all supersedure cells are harvested. A second and third crop of cells can then follow. These cells invariably produce the strongest queens. Virgins from these sources and also from grafting and dedicated cell raisers are mated from some 100 Apidea mini mat­ing nucs. Careful record keeping of mated queens ensures queen lines are maintained. Colonsay offers the ideal isolation for an island mating station. However, the Hebridean islands are not the place to risk a pension on a queen rearing business!

Swarm inspections start around mid-June and finish at the end of July. To minimize colony disruption, colonies with double brood boxes are split, tipped upwards and inspected for cells on the frame bottoms of the top box. It has become fashionable amongst those wishing to keep bees “naturally” to limit the brood space and allow swarming to take place. This is seen as the bees’ “natural” behaviour. I applaud the need to re­turn bees to the wild, particularly to build up the population of locally adapted survivor stock. However, if every beekeeper were held individu­ally responsible for every swarm they release into neighbourhood buildings or trees, attitudes to swarm control might change. And that is the case on Colonsay! I am the only beekeeper on an island, whose economy now derives much of its income from holi­day lets and second homes. Most of the public are very frightened of bees, and retrieving swarms from under old, slated roofs takes days of work. Breeding non-swarmy stock and making careful inspections for swarm preparations are a much better invest­ment of my labour.

I would also question whether swarming is the natural or most com­mon mode of queen replacement for the Black Bee, the race of northern climes. Swarming is highly risky and biologically expensive in northern latitudes. Seeley & Morse11 and also Morales12 indicate that around 75% of swarms at 46 degrees north die in their first winter. Supersedure would seem to be a much safer alternative to have available in one’s genetic tool kit. I have found supersedure to be a heritable trait, with some lines su­perseding up to five generations in a row. I commonly find mother and daughter laying together. Good luck, however, is important in providing

August heathers in full bloom

August heathers in full bloom

good mating days, when required by the supersedure virgin. Virgin vi­ability for Black bees can stretch to a month after hatching, rather than the predicted two weeks for southern races. Being able to take a beekeeping class through a hive with three gener­ations of “queens” running together (old marked queen, autumn drone layer and spring virgin) packs a lot of teaching into one demonstration! Lo­cal vicinity matings, rather than mat­ings at distant drone congregation areas, also seem to be an adaptive trait of the Black Bee. Temperatures on Colonsay seldom get above 20 C (68F) and matings at 16/17 C (61-63 F) are common.

Breeding improvement of small, isolated populations. The demise and genetic loss of the minority bee races across Europe has largely been due to their historic lack of selection and improvement. Small scale local bee­keepers have not had the resources or inclination. It has always been much easier to import improved stock from elsewhere. I would argue that genetic conservation and stock improvement are not incompatible. Local beekeep­ers using “improved stock” are then much more likely to maintain and fur­ther spread these genes into the local gene pool and back into the wild, as survivor stock.

So, how much improvement is pos­sible within a small 60-colony popula­tion, without the loss of genetic vari­ability and subsequent problems this may bring? Over the past 40 years im­provements on Colonsay have been considerable, particularly in terms of gentleness and non-swarming.

Breeding Strategy. The genetic base of Colonsay’s population came from 30 imported queens, each mated by, lets say, an average 10 drones. Some 300 queens might then have con­tributed to Colonsay’s genetic mix. This number could be considerably less, if purchased queens had mul­tiple brother matings and also from initial loss of queen lines due to my poor, initial beekeeping skills. From the outset, to maintain that diversity, I have culled the worst, rather than bred from the best. Each apiary is considered in isolation; 3-5-year-old “breeder queens” replace themselves, and also one or two of the worst one-year-old stocks. In contrast to large-scale, carefully monitored and highly selective breeding programmes, im­provements by this method can only be small and incremental. However, over the decades progress has been good and crucially there have been no problems associated with genetic loss or loss of sex alleles. Brood pat­terns are solid and DNA analysis has further confirmed continued pres­ence of initial sex alleles.13, 14

Breeding Improvement Analysis. I am often asked by the scientific com­munity to validate and quantify stock improvements. I was even asked by one visiting breeding professional to show him my stud book! No, I think the quickest way to evaluate a small closed population is to look at the average and find the worst. Gloves are no longer required, little smoke is used and many inspections can be done without a veil. This experience is similar to other populations of pure Blacks across the world.

Disease. I was very fortunate to be able to bring disease-free stock out to the islands before varroa and Nosema ceranae were brought into the U.K. An almost virus-free population is a valu­able resource for scientists researching honey bee viruses and their impact on honey bees when associated with the varroa mite.15, 16

Chalk brood (Ascosphaera apis) is perhaps the only bee disease that might concern Colonsay’s bees; al­ways present, particularly in cold, late springs. Bee milk can be thin if fresh pollen is scarce, and undernour­ished larvae easily succumb. Chalk brood might also be the consequence of a survival trait of the Black Bee — “poor thermoregulation.” Spring on the Northern European fringe is very much a start-and-stop affair, unlike spring in Continental and Southern Europe (read Carniolans and Italians). Maintaining constant temperatures over an expanding brood nest can be a very expensive drain on dwindling winter stores. Poor thermoregulation and sacrifice of the exterior of the brood nest, as the cluster tightens, is an adaptive trait of northern bees. Is chalk brood perhaps the evolutionary cost of colony survival at the fringe? Most colonies outgrow chalk brood when conditions improve.

The bee louse (Braula coecae), now absent in most of the world’s honey bee populations, still makes a living on Colonsay. They are never much of a problem, apart from disfiguring cut comb sections. I have noticed large numbers of lice transfer to queens in late autumn. Nurse bees are no longer feeding brood and perhaps the queen becomes the main source of mouth-to-mouth feed transfer, from which the louse can steal a meal.

Mother and daughter together on comb

Mother and daughter together on comb

Conclusion. As I write this in early April, the COVID-19 virus has pitched Colonsay back to the 1970s, when this story began. Ferries sail from the mainland on only two days per week and are strictly limited to islanders. This small community must again turn to its own resources and away from mainland reliance. Surely the spread and worldwide impact of this virus will teach the world beekeeping community a valuable lesson. If not, the spread of the next deadly bee vi­rus, along with the Tropilaelaps mite, seems a certainty.

Acknowledgement

The author would like to thank Tom Seeley for his encouragement to write this article for ABJ after his visit to Colonsay in summer 2019, and for kindly reviewing the original draft.

References

  1. Wildlife and Natural Environment (Scotland) 2011 Act. The Bee Keeping (Colonsay and Oronsay) Order 2013
  2. Tinsley J. Experiments in the Breeding of Native Strains of Bees. Lecture given to the Central Association of British Bee­keepers Association, Gloucester, 1956
  3. Eva Crane Diaries, IBRA Library. Carreck N. IBRA Science Director pers com.
  4. Paxton,R.J.,Brown M.J.F., and Murray T.E. 2009. Special Issue on “Bee Conser­vation” Apidologie 40: 193-416
  5. M Alice Pinto et al. 2014 Genetic Integ­rity of the Dark European honeybee (Apis mellifer mellifera) from protected popula­tions. Journal of Apicultural Research 53(2): 269-278
  6. Seeley T. D. et al. A survivor population of wild colonies of European honeybees in the northeastern United States: inves­tigating its genetic structure Apidologie 46 654-666 (2015)
  7. Adam, Brother (1983) In search of the best strains of bees. Northern Bee Books; Heb­den Bridge, UK. 199-201
  8. Jensen Annette B. et al. Varying degrees of Apis mellifera ligustica introgression in protected populations of black honeybee, Apis mellifera mellifera, in northwest Eu­rope. Molecular Ecology 14, 93-106 (2005)
  9. Pinto Alice M. et al. Genetic Integrity of the Dark European honey bee (Apis mellifera mellifera) from protected popula­tions: a genome-wide assessment using SNPs and mtDNA sequence data Journal of Apicultural Research 53(2) 269-278 (2014)
  10. Martin S.J., Ball B.V., Carreck N.L. The role of deformed wing virus in the ini­tial collapse of varroa infested honey bee colonies in the UK Journal of Apicultural Research 52,(5) 251-258 (2013)
  11. Seeley,T.D., Morse, R.A. The natural nest of the honey bee (Apis mellifera) Insectes Soc. 23, 495-512 (1976)
  12. Morales G.S. 1986 Effect of cavity size on demography of unmanaged colonies of honey bees (Apis mellifera L.) MSc Thesis, University Guelph, Ontario
  13. Palmer K. A., Jensen A. B. (2001) Bee­keeping and Biodiversity in Europe (BABE) research Pers. Com.
  14. Theisen Schmidt S. 2011 Inbreeding in an isolated population of Black Bees on the Scottish island of Colonsay. Bachelor Project, Copenhagen University, Denmark
  15. McMahon, D.P., Natsopoulou, M.E., Doublet, V., Fürst, M., Weging, S., Brown, M.J.F., Gogol-Döring, A., Paxton, R.J., 2016. Elevated virulence of an emerg­ing viral genotype as a driver of honey­bee loss. Proceedings of the Royal Society of London B: Biological Sciences 283, 20160811. DOI: 10.1098/rspb.2016.0811
  16. Ryabov et al., 2014 A virulent strain of Deformed Wing Virus (DWV) of Honey­bees (Apis mellifera) prevails after Varroa destructor-mediated, or in vitro, transmis­sion. Plos Pathogens. 10,6,21p., e1004230

Andrew Abrahams is both an oyster and bee farmer. He has kept bees commercially on Co­lonsay for 40 years and has wide experience of honey production and queen rearing. His back­ground is in agriculture with a BSc (Hons) Degree in Agriculture and is a Master Beekeeper with the Scottish Beekeepers Association. He has teaching experience in both beekeeping and agricul­ture. Colonsay is home to one of Europe’s few populations of pure Black Bees (Apis mel­lifera mellifera), the U.K.’s native honey bee. The bees on Colonsay are managed for com­mercial honey production and queen rearing, but are also of unique interest to honey bee conservationists and scientists studying bee diseases. The 50-60 stocks of Black Bees on Colonsay are self-sustaining. Years of selec­tion have produced a productive and gentle strain. In 2013 the Scottish Government passed an Order under the Scottish Wildlife and Natural Environment Act (2011) WANE that will ensure Colonsay remains a Reserve for Apis mellifera mellifera.

© 2020 American Bee Journal; reproduced with permission

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