Dragon Run in a Kayak

Ever dreamt of returning to another era for casting your eyes on celebrities and moments when history was made, but not staying long enough to be risky? Everyone has their favorites, and one of mine is to join Captain John Smith’s crew when they explored the Chesapeake Bay watershed over 400 years ago. I often wonder what it looked like in those days, as I live in it today. His route probably crossed the Dragon Run in the Middle Peninsula of Virginia as he headed for Werowocomoco to meet Chief Powhatan and his daughter Pocahontas. Traveling back in time may always be impossible, but I don’t have to close my eyes to imagine the journey because the Run is one of the few remaining pristine places in the coastal plain that can be explored by canoe or kayak, much as the Mattaponi Indians did for fishing and hunting beaver.

Hiawatha

The Dragon is a ribbon of brown water running through a swamp. Down the centuries it has been lucky to avoid draining, and in recent decades it has been protected, piecemeal, by conservation-minded folk and the Nature Conservancy.  First recorded on maps around 1670, its name has puzzled people ever since. According to one story, plantation owners named it as a warning to slaves who might try escaping across the swamp to free states via the “Underground Railroad.” Perhaps a superstitious belief in dragons deterred them, depending on how awful their circumstances were, but the dangers of getting lost in the swamp were not exaggerated. Even today, it would take a bold soul to cross it on foot, especially on a summer night, but it offers a pleasurable paddle by day in a small party of kayakers. I joined them in April.

A sluggish flow gently carried us downstream so that paddles were used more for steering than propulsion. The channel was barely wide enough to pass other paddlers or to turnaround, and by late May it will be so choked with weed that it is impassable, especially with a low water table. From then until fall the swamp is virtually unvisited, and the rich community of plants and animals return to a peace that is eons old.

Dragon Run

Bald cypresses in the swamp

We glided past bald cypress trees that were already middle-aged when Captain Smith passed this way. Most trees can’t tolerate standing in water for long, but bald cypresses thrive in swamps, perhaps compensating for the low oxygen concentration by growing “knees” above the water level. They are unusual for their family in being deciduous, and on that spring day their bare branches had the first green traceries.  The bole of one tree had a patch of resurrection fern (Pleopeltis polypodioides), which shrivels to limp, brown leaves in times of drought but come back to life when it is wetted, a cycle that can be repeated over and over for a century. Perched on the top of another bald cypress was an old bald eagle’s nest, or as much as a storm had left the distressed owners.

You know when you are in a place that is unspoiled and rarely visited if the flora is overwhelmingly dominated by native species. I hardly saw any aliens. There were royal and cinnamon ferns, fetterbush, featherfoil, rose azalea, pickerel weed, arrow-arum, Virginia blue flag, and so many more, including bloodroot which was harvested by Indians as a medicine. There were plenty of herps too, though we never saw the watersnakes and turtles, lizards and skinks, frogs and toads, and the 90 species of birds, including the gorgeous Prothonotary warbler. Go there in summer if you dare brave the clouds of insects, but that day there were only jewelwings patrolling for prey and freshly-hatched Eastern Tiger Swallowtails dancing overhead. Fifty-five species of fish inhabit the Run, but they didn’t show themselves, and muskrats and beavers dozed in their lodges, digesting the fiber diet they ate the night before.

Middle Peninsula, VA

Beaver Lodge on Dragon Run

Dragon Run quickly dams with logs felled by storms and beavers.  A team of volunteers regularly clears obstructions, but the indefatigable works of those aquatic engineers are particularly challenging. The solution to the problem of respecting the beavers’ interests while allowing kayaks to pass was inspirational. The team fixed a wooden board midstream between two posts so that animals could continue to pile logs and branches on either side of them but wouldn’t interfere with the board, which we easily lifted for floating further downstream.

Our hulls frequently bumped over unseen objects, which could have been alarming if we were in alligator country much further south. The water is as murky as brown soup, and for the same reason that it is loaded with organic matter. Although “pure,” meaning free of pollution, it is unwise to practice eskimo rolls there because it is shallow and the ancient ooze below is unplumbable.

Dragon Run is cared for by Friends. All natural wetlands need friends because they are still denigrated for the difficulties of putting them to “use” by developers and farmers, but their virtues as water purifiers, storm buffers and habitats for threatened species is now better appreciated.

A doughty lady at the heart of the conservation program has led paddling parties for years, as she did that day. She must be made of pioneer stock because, even now approaching age eighty, she was our navigator, authoritative naturalist and advocate of wild places. She told me that until very recently she was taking solo tours on the Run to photograph the wildlife at night. I heard she is called the “Queen of Dragon Run,” but in an earlier era she might have been baptized the “Pathfinder” because there could be no one better qualified to lead runaways across the swamp to safety.

Next Post: Clover patch

 

 

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Ghost of the Moa on Sanctuary Mountain (Maungatautari)

We have been tramping up a gently sloping meadow and stopped to gaze through the gloaming at the fuzzy forest border fifty yards ahead. Looking back to the west, afternoon thunder-heads are dispersing into ribbon clouds braided with gold from a sun that has already rolled over the world’s edge. The sky has broken open for the first stars to twinkle and a half-moon to peep out. Lines of hills below look like furling gray waves into the distance, with a dark form lying in one valley like a sleeping giant. Middle Earth is going to sleep as the evening wears on, apart from a few lighted homesteads in the direction of Hobbiton.

The scene wrenches memory back to boyhood days. I would take off after supper with a camera around my neck for flash photography of badgers and foxes emerging from their dens in the twilight. Then, I was headed for a twenty acre “forest” where the orange glow from London never went out at night; now, we stride towards a forested mountain which is disappearing into a primal darkness. Then, it was the North Star I traced from pointers on the Plough (Big Dipper); here, it is the Southern Cross that guides navigators. Then, I used to peer into a village pond for frogs and newts before reaching my destination; now, as I look at the murky giant I remember how it was Lake Karapiro a few hours ago, sparkling in sunshine and from the splash of practicing Olympic rowers.

brown kiwi road signMy son and I have come for the wildlife of the New Zealand night, and specifically for kiwis. We came for prejudice sake, favoring native feather and beak over foreign fur and fang. The closer to the forest the further behind we leave familiar creatures introduced from other lands that have created havoc in the countryside—deer, rabbits, hedgehogs, stoats, ferrets, possums, feral dogs and cats. But when we enter the “Maunga” we will tread the forest lightly, respectfully, even reverentially, as the sole aliens.

Maungatautari became “Sanctuary Mountain” some sixteen years ago when it was encircled by a 47 km pest-proof fence, the longest of its kind in the world. Foreign predators and browsers were eliminated inside the preserve along with as many invasive plants as could be found so that native species could be reintroduced and flourish. For millions of years before humans discovered New Zealand this was an Eden for wildlife and an evolutionary laboratory where strange forms evolved, yet never a serpent. It was an unnecessary luxury for some birds to keep the powers of flight, and gigantism evolved in the absence of large predators except for the Haast Eagle.  But the helpless waddlers and megafauna were under a pressure they could not resist when human migrants started arriving some 800 years ago bringing with them (accidentally or deliberately) a menagerie that drove the moas and other amazing creatures to extinction. Many other endemic species barely hang on today, mostly where predators cannot reach them and their natural habitat survives in the relative safety of offshore islands.

The Maunga was never completely logged, and a good many native trees survive in inaccessible places or by luck. Thankfully there have been beneficent landlords since the days it was owned by a Maori queen, yet the native fauna never fared as well as the flora. At last it is safe to reintroduce some “originals”, such as kiwi, kaka, kokako, takahe, hi-hi, kakariki and giant crickets. I have seen some of them in daylight, but the shier ones only rouse after dark.

Tom is leading me towards a pinpoint of red light in the blackness at the northern entrance to the preserve. He feels for a button he knows will open the security gate so we can step inside a large wire cage and exit into the forest through another gate.

Once inside, we turn on our LED headlamps to look around. The fence is made of wire mesh about 8 feet tall, and there is a thin wire on top suspended by insulators for shocking possums and other agile invaders. To foil the most determined burrower, the fence is buried deep in the ground. I tilt my head to shine light on an information board that explains why and how the Maunga became the first large onshore preserve. It is a story of vision and volunteers to remember when I get home to Virginia.

I am now following the ellipse of light cast by Tom’s lamp on the narrow track. We wind between stands of tree ferns whose fronds lean on long stout stems like enormous fans, and walk under the boughs of unidentified trees (I wonder if any is the famed kauri). None of the trees in this part of the preserve is enormous, perhaps because it was clear-cut years ago and is still regenerating. Elsewhere I have seen some giants, including the rimu which provides nutrient-rich fruit in mast years for kakapo chicks to gorge on. This giant, flightless parrot survives in tiny numbers offshore, but one day this may become its first onshore sanctuary.

The bush grows densely on the rich volcanic soil in an ideal climate, though not as luxuriantly as a tropical forest. We keep to the track and won’t risk getting lost by plunging inside. There are numerous lianas dangling from the taller trees like hawsers dragging from ships in a harbor, and lots of other epiphytes clinging to boles and boughs. As I lean back to throw my light on the underside of graceful fronds of silver ferns I understand why this pteridophyte is a national emblem. It took the darkness for me to appreciate its full beauty, a silver umbrella that could shelter the throne of a South Pacific queen, though New Zealanders rejected it from the design of a new national flag in a referendum this year.

The forest is silent apart from the rattling stream that runs close to the track and an occasional cry as we startle a roosting bird. We stop and turn off our lamps. Although only fifteen feet apart, Tom is suddenly invisible, but I know from experience in woods at night that if we wait for half-an-hour we will be fully dark-adjusted and able to see each other’s ghostly outline and the way ahead, however faintly. But suddenly Tom breaks the silence, exclaiming, “Hey, look!” His night sight is better than mine, but I soon see the amazing spectacle of hundreds of beads of blue-green lights in the bank alongside the track. The word awesome is too hackneyed to express the emotion of being surprised by a joyful sight that was never intended for our pleasure but given abundantly all the same. I feel as if I have parachuted into a movie set where elves have strung fairy lights to guide walkers to a mysterious destination. Perhaps if we hurry we will catch sight of Frodo.

The lights remind me of glowworms I saw while floating through the Waitomo caves. They are not worms, not even beetles, but the larvae of a kind of gnat (Arachnocampa luminosa) that use their lights to attract unwary prey to sticky threads dangling from cave roofs, and like “wreckers” of yore along the English coast. When I turn my lamp on and bring it very close to one of them it fades instantly, and a brown grub comes into view and crawls away.

We have tramped nearly a mile into the preserve without seeing or hearing a kiwi. Tom is confident that they are here but has stopped beside a tall tree to examine a box over a foot long and screwed to its bole at shoulder height. “It’s a weta refuge,” he explains as he twists the outer cover to reveal a narrow passage under the acrylic inner lining. “No one at home,” he sighs. The Giant Weta (Deinacrida spp.) is a cricket 4 inches in length and heavier than a sparrow. I am sorry to miss the largest insect in the world, but he has already switched my attention by crouching to peer into the hollow base of the tree. “That’s huge!” He points from a safe distance at a black tunnelweb spider (Porrhothele antipodiana), and I watch it scuttle out of sight.

If the unexpected is sometimes the most memorable part of a journey, grasping the most anticipated is often the sweetest. We came for brown kiwis which breed here after a century of absence, but there is still no sign of them. I imagine one shuffling towards us like a shaggy specter, too short-sighted to see us and too distracted to bother looking up as it probes for insects and worms with nostrils at the end of its ridiculous beak. There is still a chance of hearing them when females emerge from their burrows or a hollow log after darkness to call their chick to go hunting, but we won’t hear males whistling this long after the courtship season is over.

Brownies are the only kiwis on the mountain, and the commonest of the five species, but nowhere are they abundant. I guess that to encounter one is to feel flung back to an epoch when their cousins roamed here as the avian equivalents of herbivorous dinosaurs, and it makes me sad to think we missed the moas by the blink of a few centuries. Kiwis are the smallest of the ratites, and small is beautiful because it helped them to evade the fate of their giant relatives, which now only live in the imagination or stiffly in museums.

Curnow poem

The return of kiwis to the bush is both a triumph and a dilemma for conservation because unless fresh blood is introduced here from other communities their health and reproductive success will suffer from inbreeding. A ranger comes during the breeding season with a muzzled dog whose nose is trained to find their nests. Some eggs laid in the preserve are taken away to incubate in a crèche where young birds are raised for transfer to other havens.Ranger & kiwi dog

The chances of hearing a kiwi tonight are fading and we will soon turn back. We strain our ears now even harder for night sounds and hear a distant, drawn-out “ee-wee” which reminds me of a recording of a weka (a kind of rail). Could we be so lucky to stumble on a rare bird not listed here? Maybe it is only a frog or toad because “Hope is the thing with feathers.” Something is now flying back and forth above us although we only hear it calling “quor-quor,” and because it “comes with gossamer softness” I assume it is the owl morpork.

Peace will reign here again after our last footstep and click of the gate latch. To walk in the woods in darkness is to be a stranger in the domain of secretive creatures that eke out their existence largely unknown and unwatched. Nocturnal visitors never come for hunting or logging, but for watching. And to sit quietly is a far deeper experience than tramping for, as light yields to night, you can feel a progressive absorption with the trees and undergrowth, and a primitive imagination tricks you into thinking you have become invisible, all-seeing, all-hearing.

Perhaps even now a kiwi is close-by in the bush, watching and making fools of us. Next time I will try my luck by watching the path with my back against a tree, just as I did long ago in the badger wood. But wait … I hear something yet, although certainly not a musical voice! A more apt description would be guttural because it sounds like someone is having a painful episode of retching. It is coming again and again, almost monotonously, and further off we can hear another—perhaps calling to the first. Tom is pulling out his mobile phone to check for a 3g signal—it is strong even here. He has found a website with recordings of kiwis and holds the phone between us as we wait for the mp3 to download. Yes, yes, that’s it!

I can now add the kiwi to my list of species encountered in the wild, what birders call a life bird. It doesn’t matter that we won’t see it strutting through the forest as its strange ancestors have done for eons, because its spirit will live in my memory thanks to the Maunga.

Drafted in New Zealand

Next Post: On the Dragon Run with a Paddle

 

 

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Two Beekeepers in the New Zealand Bush

Honey is almost emblematic of New Zealand, like surf beaches, kiwis and hobbits, and Winnie the Pooh would drool thinking about it.  I leaped at the chance to spend a day with a professional beekeeper whose hives are in the bush for making Manuka honey.

We left home in the dark at 6 AM for a short drive to Steve’s depot where he picked up a portable incubator containing several dozen queen bee cells. He is passionate about the industry in which he has worked for over a decade, learning the ways of honey bees on the job. There is a Honey Research Center at the University of Waikato in Hamilton, but there are no professional qualifications for beekeeping, which is surprising for an industry so vital to New Zealand’s agriculture.

His firm has six fulltime staff plus a few students who are hired during the busy summer months, and that is how Steve got involved. Cambridge Bee Products currently manages around 5,300 bee colonies, and expanding. As a backyard beekeeper in Virginia I gasped at the scale, but evidently his company is far from the largest in the country. The industry is thriving and, compared with other sectors of agriculture including dairy, it has never suffered a recession. His company barely meets demand for its finest product—Manuka, the most highly prized honey in the world (see previous post) which, in good years, is more than 70% of his harvest, and 95% of which is exported.

The roads were wet from overnight rain when our truck pulled into his depot. Parking space was limited beside a forklift truck and the neat piles of Langstroth hive boxes and barrels containing 300 kg of honey when full. In the dim light I couldn’t see an alarm system, but the property had to be secure because I had seen the firm’s honey for sale in a local health food shop at over NZ$100 per kg. A quick calculation estimated that each barrel of the best grade is worth tens of thousands of dollars, though middlemen and retailers take a large bite of the raw value.

The honey harvest is brought to the premises from remote parts of the North Island. Manuka honey is certified by the UMF Honey Association to guarantee authenticity and grade it for quality because many brands contain only a fraction of the active product while others are fraudulently adulterated with cheap honey or syrup.

Barrels of honey, hive boxes and ingots of beewax

Barrels of honey, hive boxes and ingots of beewax

Inside the warehouse ranks of orange barrels and colorful hive boxes rose to the roof. The boxes were made by the staff from pine boards treated with a non-toxic preservative and paint; they have a lifespan of around 20 years in the field. In front of them large yellow bars were neatly stacked like gold ingots at Fort Knox, but weighing a mere 6 kg. They were pure beeswax extracted from old honeycomb for making candles and other molded products.

Honey is the company’s main business compared with big bee firms in America who make most of their income from pollination services for farmers by migrating thousands of hives around the country to crops as they blossom in turn. Only for a few weeks do some of Steve’s hives stand in fields for pollinating kiwi fruit, avocados and blueberries, and none of those crops produce quality honey.

Comb decapper and two honey extractors

Comb decapper and two honey extractors

I followed Steve into the honey production plant through a series of adjoining rooms to admire his automated equipment. Backyard beekeepers extract honey with heated knives to decap comb, but it’s a slow and messy process. His first machine decaps in seconds by piercing the comb with arrays of short spikes mounted on a metal plate that precisely match the centers of cells across the frame. Afterwards in groups of eight, frames are loaded into stainless steel extractors to centrifuge the honey to the sides where it drains for collection. The honey is then heated in a large vessel to kill yeast or other cells that might be present before filtration and storage in barrels. At the final stage a machine automatically fills bottles with 250 or 500 or 1,000 g of honey, and even puts on lids and labels.

I liked the clean facilities and that nothing was wasted. Frames were recycled about every five years with a fresh plastic base coated in wax for the bees to draw. Honey residues were collected as sticky molasses for farm animal food, the wax was extracted in a larger melter, and any comb that remained was used as fertilizer.

After the tour I was eager to meet the rest of the team who live in bush country north of Lake Taupo. It was getting light outside when we hopped back in the truck for a two-hour ride.

Hive-ho in a bee yard

Hive-ho in a bee yard

The hives were stationed in groups of two or three dozen in glades that he called “yards,” and out of sight from thieving eyes on country roads. Hive robbing and vandalizing happens. He lamented that at one time there was an unspoken gentleman’s agreement not to place hives within a kilometer or two of a competitor, but as profit attracts courtesy retreats. ‘tis often so.

The bee yards were chosen for local abundance of tea trees which provide the nectar for bees to convert into Manuka.  Steve groaned that too many trees are torn down by landowners who think they are eyesores and don’t realize or care that bees make a precious product from them, like turning base metal into gold. Of course, they never feed exclusively from tea trees, and the grade of Manuka depends on the location and season. The coconut-scented yellow blossom of gorse attracts insects in early spring, and purple heather feeds them at the end of the summer. A long blooming season offers a wide menu in the bush, but the rewa trees stand out for their fabulous red flowers for bees to drink from deeply.

When we arrived at the first yard, the hives looked pint-sized with only a brood box or no more than one super on top. Had I come before the honey harvest in January they would have been piled shoulder high with supers heavy in comb. A super full of honey can weigh 35 kg, enough to coin a name for a medical syndrome, “Apiarist’s Back.” I was too mortified to describe our tiny harvests.

We donned bee suits and started inspecting each hive in turn. Removing the galvanized roof and inner cover exposed the ends of nine full-sized frames, and encouraged a few guard bees to fly out to inspect us. The brood boxes had a couple of small entrances the size of a ten cent coin and stood on stout wooden frames with a wire mesh floor which was left uncovered year round.

Nice frame

Nice frame

As I probed Steve for statistics I wondered how kiwi apiaries can be so productive and colony losses so slight, rarely exceeding 10% a year. Could weather and climate be partly responsible? I was surprised that the climatic zone was not much different to ours in Tidewater Virginia (8 cf. 7b), because our summers are hotter and more humid, while our winters are longer and colder. Since his winters are almost frost-free, nectar flows for much longer and colonies only need feeding for 2-4 weeks if at all. Another factor I considered was the advantage that his colonies have out of range of sprays and other hazards in gardens and farmers’ fields. Then I thought about the lower load of parasites and diseases in a clean environment, although I was surprised how many of them have already reached New Zealand. American (though not European) foulbrood is there, I saw silken evidence of wax moths in some boxes, and that great foe the vampire mite, Varroa destructor, arrived in New Zealand over 15 years ago. Australia is the only country with a major honey industry free of mites, although it had a close call last year when dock officials in Brisbane found bees infested with them in a shipment of goods from Malaysia. It’s only a matter of time before Aussies share our woes. But we saw very few mites that day, which he credits to formic acid pads laid under inner covers and oxalic acid which he sprays through entrance holes. Both of these treatments are considered natural, and they don’t persist in honey or wax. Hive beetles were absent, but robbing bees and wasps sometimes stripped a hive, but that’s a universal problem. When I asked him about colony collapse disorder and killer bees, he nodded to acknowledge that it is a big issue in other countries.

I came away with the impression that no single reason explained the health and productivity of bees in New Zealand. There were additive advantages of a better climate, fewer parasites and less pollution. He didn’t and couldn’t make frequent inspections like we do, but was anxious to breed beneficial traits, by which he meant productive queens and docile worker bees.

His hives are re-queened annually and the company buys genetically superior queens every year from a specialist breeder who uses artificial insemination to guarantee the character of their progeny rather than leaving fertilization to the vagaries of a nuptial flight. In the field, bees hybridize with unknown drones, but he like to see more Carniolan character: “The blacker the better.”

We visited the yards not for mere inspection but to re-queen and split hives to make nucs for new colonies. Delicate queen cells that had been warming in an incubator plugged in the truck and protected inside conical plastic jackets were now placed inside hives, one or two per frame. “Sometimes by chance I see a resident queen,” he told me, “but I can’t go through every hive so they all get a potential heir or two to fight it out until the fittest survives.”  Weak colonies were ruthlessly culled, much like a farmer might eliminate animals too sick for veterinary care. I reflected on the pains we take to save a colony from fading away until I remembered the number in his care.

It seemed odd to split hives in late summer when we schedule it for springtime to avoid the risk of swarming and in time for nucs to establish while nectar flows. But he used a familiar procedure, transferring four frames from active colonies to each nuc box, including eggs, nectar and pollen, plus a shower of worker bees. He worked fast, watching the sun’s arc because he wouldn’t return to the yards for months.

End of the day

End of the day

This work quickly filled the air with thousands of angry bees that a smoker didn’t pacify. I took the precaution of wearing gloves, but Steve had bare hands. He worked more nimbly with uncovered fingers, even if they were crawling with bees. On the ride home I mentioned I had seen him rubbing his wrist. “Did you get stung?” I asked. “Na.  Maybe only ten today.” That reply reminded me of another plucky New Zealand beekeeper, and who first scaled Everest.

After we returned home to Cambridge I had much to think about. How to apply some of the practices I had to our modest endeavors? What is the future for bees in a changing world, and will they hold out longer in New Zealand and Australia?  And I was also thinking about the remote Blue Duck Station close to the pristine Whanganui National Park. That is where he keeps the most productive hives, and some of those yards are accessed by helicopter. I am already savoring that visit for next time.

Drafted in New Zealand

Next Post: Ghost of the Moa

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Is there Manuka Honey for Tea?

When Captain James Cook anchored in New Zealand after a long voyage across the Pacific Ocean he was probably dying for a cup-of-tea. It was already a popular drink in England by the 18th Century when he sailed from Whitby, and a pot of tea warming in a brown betty is still a familiar sight in Yorkshire. I remember people brewing it for hours to make a really strong cuppa, extracting enough tannin to cure a deer hide.

brew a cup of tea

my Brown Betty

The native people he encountered persuaded him to try making “tea” from the spiky leaves of a scraggy tree called Manuka in the Maori language, which his sailors named the tea tree (not to be confused with the Australian tea tree from which the famous oil is extracted). I too was missing Yorkshire tea on my latest visit to New Zealand and wanted to try Maori tea for myself. After brewing a bunch of dried tea tree leaves for an hour, the water turned faintly orange and developed a citrus fragrance. If appearances could be trusted, the “tea” was promising, but I hadn’t reckoned on a bitter assault of my palate by the terpenoids. Perhaps that experience hurried Cook home for his brown betty.

Tea tree (Manuka)

Tea tree (Manuka)

The tea tree might have remained in obscurity after Cook’s experiment because, apart from a seasonal show of white or pink blossoms, it is an ugly shrub. But sometimes there is great virtue and fortune hiding beneath an unattractive exterior. Someone noticed that nectar collected by honey bees from tea trees makes a highly distinctive kind of honey, which has become the most prized in the world. It looks like mud in a bottle or spread across a slice of toast, and most unappetizing compared to the clear and syrupy product in your grocery store. It tastes oily or earthy and lacks the intense sweetness that characterizes most honeys. It is so expensive that Tesco supermarkets in the UK lock it inside security boxes with alarms to thwart shoplifting. As caviar is to shrimp and vintage Burgundy is to a cheap Cab, manuka is to “garden” types of honey. It is gooey gold, as rare as the ore itself.

The reputation of Manuka honey forges past scientific and pecuniary caution like most other supposed health products, and goes even further. Some people speak of it reverently as if it is holy water. There is no doubt that it has antimicrobial activity, but regular honey has plenty from its peroxide and high sugar content from which it earned a reputation for wound healing even in ancient times. But it possesses other pharmacological properties that are unique and may make it superior for attacking bacteria and fungi. At least some medical professionals are convinced, because medical grade Manuka honey is used in wound dressings (it stings). But most people purchase it because they enjoy a spoonful as a treat, or to impress their guests with a luxury product going up in smoke after spreading it liberally over barbecued fish, or for treating a skin eruption or warding off a gastrointestinal devil. Manuka enjoys a high reputation because it is a product of the relatively clean New Zealand environment where it is harvested from hives deep in the bush far from crop spraying.

It is la crème de la crème for New Zealand beekeepers and their most valuable “crop” which they must guard against fake products because it is as vulnerable to fraud as a Vuitton or Gucci handbag.

Some cheaper Manuka honey mixes on NZ grocery shelves

Some cheaper Manuka honey mixes on NZ grocery shelves

As a natural product honey can never be guaranteed to be uniform or from a “pure” source. Bees have favorite food plants but a colony visits a range of flowers which vary during the flying season. Manuka is not in flower all the year round, and the properties of its nectar vary between seasons, sites and specimens. Every batch of honey is different, and therein is a dilemma for beekeepers preserving the quality and reputation of their product, and for customers who don’t want to be scammed.

Of course, you can be sure that honey marketed as Manuka at unbelievably cheap prices is unbelievable, but beyond that the customer has to look for an official sign of authenticity. There are plenty of brands labeled Manuka that honestly declare the fraction of the whole, but according to what I heard over 80% of that advertised as the genuine thing in Asia is adulterated with regular honey or syrup.

Beekeepers go to great lengths to protect their industry. One firm I know safeguards its product by bottling and labeling the entire harvest on its own premises. It is also licensed by the Unique Manuka Factor Honey Association which is a guarantor of quality after testing three compounds that account for some of the non-peroxide antimicrobial activity. Genuine products can be recognized by the UMF® label, and are rated for quality up to 20 (rarely available). UMF is the “official” standard, but customers are confused by ratings from an independent company which uses a different scale. In one airport shop I saw a kilogram bottle rated at MGO 800+ which is roughly equivalent to UMF 20. By the way, it cost NZ$800!

You might think the best test of Manuka in honey is the proportion of pollen grains from the tea tree. Unfortunately, the related Kanuka tree is also a favorite food plant of bees, but it has almost indistinguishable pollen and it doesn’t produce such a valuable crop of honey.

The UMF laboratory tests three compounds, including methylglyoxal (MGO) which is given the most credit for healing properties since it kills bacteria long after peroxide activity is degraded by catalase activity in human tissues. There little MGO in fresh honey, but it builds up during storage as the concentration of dihydroxyacetone (DHA) declines. DHA is the second compound tested for UMF. It is used elsewhere as a fake sun-tanning agent and I guess contributes to the browning of proteins in Manuka honey.

Beekeepers can’t sleep peacefully after their products pass the UMF test because MGO and DHA can be bought as pure compounds for adulterating “garden quality” honey. When I checked with an American chemical company from which I used to obtain lab supplies I could buy quantities of both compounds for a few hundred bucks, enough to fool labs of tons of honey. The industry is aware that a cat-and-mouse game may already be in play with fraudsters and is looking for more robust markers. Gas chromatography-mass spectrometry can generate a molecular fingerprint of honey samples which should be foolproof. The equipment tests far more markers than can easily be added and requires technical expertise, but the expense will eat into profits. The tea tree produces a wondrous honey, but it comes at a high cost and bitter taste.

Auckland Airport

Medicate with Manuka! (Auckland Int. Airport)

Posted in New Zealand

Next Post: Two Beekeepers in the New Zealand Bush

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Frozen Eggs Perks as Policy

Ashton Carter announced the Pentagon will make a bigger commitment to family-building for people serving in the military. The package includes new benefits for maternity leave and child care, and even a pilot scheme for egg and sperm freezing. The news is less surprising since Facebook and Apple rolled out a policy of offering $20,000 perks to young employees for defraying the costs of egg banking, which amount to >$10,000 per cycle + annual storage fees.

The aim is to retain highly-trained staff from leaving early to start a family. Most women are aware that their biological clock starts to wind down from around age 30, long before the average age of menopause. Egg banking is portrayed as fertility insurance, but is it just a lottery?

egg freezing

Eggs come in from the cold

The first freezing trials with human eggs were far less successful than with embryos. Since they are delicate single cells, their survival is all-or-nothing, whereas embryos afford to lose one or two cells from the bunch. Fewer than half were surviving in the 1980s, and very few of them made babies with IVF. Even more alarming was the evidence that chilling damages apparatus in eggs on which the chromosomes “dance” during cell division, putting babies at risk of birth defects from the wrong number of chromosomes. Many labs besides our own tried to improve results, but the breakthrough came with vitrification, which turns cells into a glassy solid instead of ice. Masashige Kuwayama at the Kato Clinic in Japan perfected the method. It involves ultra-rapid cooling in a highly concentrated solution, similar in some respects and different in other ways to making smooth ice cream. Like home-made ice cream, vitrification is not a technically sophisticated process, but it demands expertise of the technician who, working under a microscope, mounts each egg in a minute droplet for plunging into liquid nitrogen. I wonder if a technique that depends so heavily on operator skill in an unregulated environment can produce consistent results across clinics.

Egg banking emancipates fertility preservation for women, whereas men have had sperm freezing since the 1950s. The original rationale for banking was to help young women preserve their fertility from the sterilizing effects of high-dose chemotherapy and radiation. It also helps women to have genetic children after a hysterectomy, although a surrogate must then be commissioned to carry the baby. Before egg banking there was embryo freezing, but that requires IVF and therefore a male partner, or ovarian tissue freezing, which we developed as an alternative technology and is still used for child patients. One of the great advantages of freezing eggs versus embryos is that there are fewer issues surrounding the disposal of surplus eggs because they carry less moral gravity.

Although egg banking has been a bright hope on the dark road through cancer treatment, it is now embraced by far greater numbers of healthy women. This is being encouraged by perks from employers and lauded by media reports and TV. As if that publicity was not enough, clinical providers are heavily invested in advertising. I am told that business is booming, and more and more fertility clinics want some of the action.

But pause to consider the “customer.” I think that word is more apt than either patient or client, because these women are seeking treatment for a non-medical condition (aging) and from for-profit clinics. More and more fertility clinics that started as private medical practices are becoming absorbed into big business. I suspect these entities are now looking less and less like a familiar medical environment and more and more like normal commercial operations.

And who is the typical customer? She is a professional or businesswoman in her 20s or early 30s who dares not step off the career ladder during her most fertile years, or perhaps she hasn’t found a Mr. Right yet. There are other reasons, but a common conflict is between biological imperatives and social pressures. Employers are slowly recognizing this dilemma, but the answer they provide (if any) is technology instead of a better deal for women’s careers. Consequently, the average age of motherhood is rising, and already passes 30 at the birth of the first child in several countries. Men are luckier, although fresh mutations are more common in older sperm.

What price would you pay for a child of your own? There’s the nub of it. Fertility treatment involving IVF is unaffordable by most couples on low incomes, and those who can afford egg banking to delay family-building are investing in uncertainty. As this is a new technology there are very few centers with enough data to provide a reliable estimate of the chances of pregnancy with banked eggs. A British authority (HFEA) reported that up to 2012 there were only 20 babies born from 160 treatment cycles, and the US registry (SART) announced 162 live births in 2014, a success rate of 1 in 5 cycles. We await updates.

Success can never be assured. Since the chances with one batch of eggs are unlikely to be high, multiple rounds of treatment (i.e., more eggs) are required, and preferably collected at very young adult ages. Can you think of another product costing as much with so little security? Would you buy a new car or boat from a dealer without a guarantee? Would you dare commit thousands of dollars to a lottery? The reason that people will spend so much on fertility services, even taking out large loans or remortgaging their home, is because having a baby is a life event. Nothing compares with it.

This cautious post may seem surprising from someone who spent his whole career in reproductive technology and biology. Egg freezing is, of course, a wonderful breakthrough which I welcome unreservedly for patients needing emergency fertility preservation, but to others I say let the buyer beware.

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