Hunters hired to control invasive species on Hawaii island kill first axis deer

Published on April 18, 2012 in General Ag News and Notes, Hunting and Invasive Species.

Hunters hired to control invasive species on Hawaii island have killed their first axis deer.

The Hawaii Tribune-Herald reported Tuesday the deer was captured in the southern part of the island.

Big Island Invasive Species Committee Manager Jan Schipper declined to say specifically where the deer was killed to prevent interference with the committee’s two hunters.

The animal native to India and Sri Lanka was first introduced to Molokai and Oahu in 1868, Lanai in 1920, and Maui in 1959, but they hadn’t been found on the Big Island until last year.

Non-native mammals such as like pigs and goats already damage the island’s environment. But axis deer are a new type of menace in part because they’re so large they can jump over fences that are meant to protect native forests.

Hunters hired to control invasive species on Hawaii island kill first axis deer – Hawaii News – Honolulu Star-Advertiser

Stink bugs migrating to the Deep South

Published on March 17, 2012 in General Ag News and Notes and Invasive Species.

On the front line of the brown marmorated stink bug invasion, Doug Inkley was overrun. Over nine months last year, he counted, bug by bug, 56,205 in his house and garden. They were everywhere.

“I literally have made homemade chili and had to throw it out because there were stink bugs in it,” said Inkley, who lives in Knoxville, Md., near the West Virginia border. “I have had people refuse to come over for dinner because they knew about my stink bug problem.”

Maybe now, they’ll come over. Entomologists say the population of this invasive species from Asia appears to have cratered in the Mid-Atlantic. Hurricane Irene and Tropical Storm Lee caused flooding, drowning stink bugs and snuffing out nymphs before they could develop.

But there is also bad news. The bugs have marched to the Deep South. Recently they were detected in South Carolina, Georgia and Florida, where farmers grow juicy vegetable and citrus crops the bugs are known to destroy.

It gets worse. Another type of Asian stink bug has established itself in Georgia. It eats invasive Asian kudzu, a good thing. But the kudzu bug also eats soybeans and other lucrative Georgia legumes.

On a working trip to Atlanta last week, Inkley, a senior scientist for the National Wildlife Federation, saw them flying about, attaching to walls by the hundreds.

“Here we go again,” he said.

Stink bugs come in a wide variety. Many are native to the United States, where prey insects keep them in check. Brown marmorated stink bugs native to China were first discovered in Allentown, Pa., in 1998, likely after crawling out of a cargo ship. Continue reading ‘Stink bugs migrating to the Deep South’

Tiny snails survive digestion by birds

Published on July 10, 2011 in General Ag News and Notes and Invasive Species.

Snails are able to survive intact after being eaten by birds, according to scientists.

Japanese white-eyes on the island of Hahajima, Japan feast on tiny land snails.

Researchers found that 15% of the snails eaten survived digestion and were found alive in the birds’ droppings.

This evidence suggests that bird predation could be a key factor in how snail populations spread.

The Japanese white-eye or mejiro is widespread in Japan but considered an invasive species in Hawaii

It is well known that plant seeds are dispersed by birds that eat fruit.

But in findings published in the Journal of Biogeography, researchers from Tohoku University, Japan investigated whether invertebrates could also spread in this way.

Previous research has shown that ponds snails can survive being eaten by fishes but the same was not known for land snails.

Studies of the diets of birds on the island of Hahajima identified the Japanese white-eye’s preference for the tiny land snail Tornatellides boeningi.

In the lab scientists fed the birds with the snails to find out whether any survived the digestive process.

“We were surprised that a high rate, about 15 percent, of snails were still alive after passing through the gut of [the] birds,” Continue reading ‘Tiny snails survive digestion by birds’

Monster blue catfish finding mixed reception

Published on July 4, 2011 in Aquaculture and General Ag News and Notes.

MECKLENBURG COUNTY, Va. — Talk to fishermen here, and you will hear the legend of Buggs Island Lake: A Navy diver sent to recover the wreckage of a small plane encounters a fish the size of a man on the lake’s bottom. He bolts to the surface and refuses to dip a toe in the waters again.

The yarn seemed as dubious as any other fish tale — until two weeks ago. An angler hooked a 143-pound blue catfish in this reservoir along the Virginia-North Carolina border; it smashed the state record by more than 30 pounds and could be a world record.

It is likely not the only one lurking out there. A monster fish that can easily top 100 pounds and stretch nearly five feet has come of age in the region’s waterways.

It has a distended beer gut of a belly, a chin studded with whiskers tipped with taste-bud-like sensors and a grunt like a pig’s. Like a creature from a Hollywood B-movie, it has grown fat from conditions created by pollution.

Blue catfish have exploded in numbers and size in many local river systems, biologists say, spawning the type of giant fish more commonly found in the species’ native Mississippi River — or in the pages of Mark Twain. And no one is sure how big they’ll get here.

The rise of “blue cats” has spurred a response as strange as any fish story. Nearly everyone agrees it is a monster of sorts, but whether that is necessarily a bad thing depends on whom you talk to. Continue reading ‘Monster blue catfish finding mixed reception’

Axis deer on Hawaii island pose problem for state

Published on May 28, 2011 in General Ag News and Notes, Hunting, Invasive Species and Native Hawaiian Plants.

State officials are developing plans to remove axis deer in Hawaii County before damage becomes significant to ranch grasslands, farm crops and plants that are vital to maintain watershed areas.

“We will need to take quick and effective action to prevent costly and destructive impacts on the Big Island that will last for generations, perhaps forever,” said William Aila, director of the state Department of Land and Natural Resources.

Kahua Ranch Ltd. Chairman Monte Richards said axis deer can cause great damage to Hawaii island’s forest in Kohala and become difficult to remove once they’re established.

“The thing is to get to them early, and you’ve got a chance,” Richards said.

Richards said Hawaii island ranchers successfully fought against the idea of importing axis deer in the 1960s. He suspects the axis deer were illegally shipped to the island in recent years by someone who wanted the animal for game hunting.

State conservation officials working closely with trackers and using game cameras to survey areas in recent weeks have confirmed the presence of axis deer across the island, including in Kohala, Kau, Kona and Mauna Kea. Continue reading ‘Axis deer on Hawaii island pose problem for state’

Kia‘i Moku: Rats run amok on isles

Published on April 9, 2011 in General Ag News and Notes and Invasive Species.

Rats have plagued Hawaiians for a very long time, and not just the human residents.

Rats were the first invasive species in Hawaii. The first voyagers to the Hawaiian Islands brought Polynesian rats, Rattus exulans, and they spread quickly, colonizing the islands faster and farther than the people. Ancient Hawaii was a world full of spectacular birds, insects, and plants; the only native land mammal didn’t crawl – it flew – the hoary bat.

These native species evolved without seed-eating, egg-stealing rodents, so when rats arrived, plants were defenseless and birds were naive to this new threat. Compounding the situation, the Polynesian rat was followed by other rodents: the Norwegian ship rat and house mouse – hitchhikers in the European and American ships of the late 1700s and 1800s. Rodents ate their way through Hawaii, overrunning the islands from the shore to mountain top, fueled by a diet rich in plants, birds, snails and insects.

According to Peter Dunlevy, a U.S. Department of Agriculture Animal and Plant Health Inspection Service biologist with 15 years of experience researching rats, the greatest impact isn’t on any one particular area. Rats hammer numerous aspects of the environment – from the seeds they devour to the nesting albatross they attack. “But everything is on such a small scale with rodents; it’s easy to overlook.” Continue reading ‘Kia‘i Moku: Rats run amok on isles’

UH gardening gurus set invasive-species classes

Published on March 7, 2011 in General Ag News and Notes, Invasive Species and Native Hawaiian Plants.

Hawaii gardeners have the advantage of a year-round growing season that allows us to pick up plants any time of year and add them to our backyard collection. And local garden centers carry an abundance of ornamental shrubs, trees and herbs from which to choose.

The University of Hawaii Cooperative Extension Service wants to help home gardeners to be knowledgeable when choosing plant material. The UH Master Gardeners on Oahu have teamed up with the Hawaii Invasive Species Council to provide classes and demonstrations to the public. (See the Star-Advertiser’s Home & Garden calendar for class listings.)

What is an invasive species? Technically, according to HISC, an invasive species is an alien species — plant, animal, or microbe transported by humans to a location outside its native range — whose introduction has caused or is likely to cause economic or environmental harm or harm to human health.

Basically, foreign plant material that propagates at warp speed and those seeds or plant parts that can travel long distances to naturally forested areas are termed invasive. These plants often demonstrate rapid and aggressive growth, production of numerous seeds that are spread easily by wind, wing or water, and the ability to grow under many different soil and climatic conditions.

What is the impact of invasive species? It’s the plants whose “keiki” reach the natural forested areas that take the largest toll on our native species and ecosystems. They threaten native plant habitats, reducing the number of native plants and affecting plant biodiversity, as well as the insect biodiversity that depends on those plants. Continue reading ‘UH gardening gurus set invasive-species classes’

Fast-growing plant threat to habitat of Lanai petrels

Published on February 20, 2011 in endangered species, General Ag News and Notes and wind farm.

LANAIHALE – For decades, researchers thought the last major colony of Hawaiian petrels in the islands nested on the slopes of Haleakala.

Then about a decade ago, wildlife biologist Fern Duvall was working on Lanai when he noticed a petrel burrow. He kept the discovery in the back of his mind for six years, until he was able to return to the island to follow up.

“We just went to see if we could detect any birds at all,” Duvall said. “It turned out that not only could we find birds – there were thousands of them. We think it’s the second-largest known concentration of Hawaiian petrels.”

Duvall suspects that the birds have thrived on the slopes of Lanaihale – Lanai’s only large mountain – because the island has so little development and few urban lights.

The night-flying birds depend on starlight to navigate and often become disoriented and crash in urbanized areas.

“Lanai disappears after dark,” Duvall said. “We think the birds cue in on this absolute darkness.”

The qualities that attracted the birds to Lanai also helped them go unnoticed for decades – and still makes it tough to get an accurate estimate of the population, said researcher Jay Penniman. Continue reading ‘Fast-growing plant threat to habitat of Lanai petrels’

Growing Future Farmers

Published on February 13, 2011 in Ag Tourism and General Ag News and Notes.

Ag tourism, marketing leaders are planting, watering seeds of interest with isle students

KAHULUI – At first glance, it’s hard to recognize the plot of land in Kahului filled with weeds, grass and natural debris. On second look, a couple picnic benches come into view and the nearby area, which was once a thriving banana plantation, becomes slightly more discernible.

However – the only thing Pomai and Lani Weigert see at the Maui High School farmland – is potential, acres and acres of it.

The mother-daughter team of ag tourism and marketing leaders are launching a pilot program to revitalize agricultural studies at MHS, Pomai’s alma mater, in hopes of harvesting future farmers and agricultural enthusiasts for Maui County.

As a result of the MHS farm replanting effort that started last month and two days of agriculture field trips, their efforts are already yielding results.

“Ag and food services have never had registration like how they have now,” MHS agriculture teacher Ian Lowland said. “Instantly the word got around: Cool stuff is going on in agriculture. They’ve been an integral part of all of this.”

MHS senior Sarah Bam said she realizes that agricultural skills are important for all people, especially those living in Hawaii: “Everybody should know how to plant and grow their own food.” Continue reading ‘Growing Future Farmers’

Public encouraged to report suspicious species

Published on December 13, 2010 in General Ag News and Notes and Invasive Species.

To the writer of the Dec. 6 letter regarding the suspicious plant found along a Maui Lani road: Thanks for keeping your eyes open. Members of the public are the first to notice incipient invasive species. Public reports are essential to protecting Hawaii from invasive species. The most efficient way to prevent establishment of invasive species is to nip the infestation in the bud immediately.

The purple-flowered plant you noticed along the Maui Lani roadway is most likely a species of crown flower, Calotropis procera. Forest and Kim Starr regularly drive Maui’s roads mapping the distribution of invasive plants. Calotropis was first detected in 2001 and is widespread and naturalized on Maui. The plant is also on Hawaii island, Kauai and Lanai. It is indeed invasive, rating as a high-risk plant by the Hawaii Pacific Weed Risk Assessment, a background check to predict a plant’s invasive potential based on its biology.

Unfortunately, Calotropis is too widespread to be eradicated from the islands Continue reading ‘Public encouraged to report suspicious species’

Archive planned at national park

Published on December 6, 2010 in General Ag News and Notes and Invasive Species.

KAHULUI – A new archive of thousands of documents that will be available to researchers, will be the next major addition to Haleakala National Park, Superintendent Sarah Creachbaum said Wednesday.

In a “state of the park” talk sponsored by the Friends of Haleakala National Park, Creachbaum said construction had already started on the small “curatorial center” near the park’s entrance and headquarters. About 30 people showed up to hear the presentation at the Maui Arts & Cultural Center, where Creachbaum also discussed the park’s visitor counts and funding.

Matt Brown, the park’s new chief of protecting endangered species, said the 800-square-foot archive building will bring together many objects that have gone unseen for years. Many of the items will be coming out of storage and some from collections, such as the Bishop Museum in Honolulu, he said.

In addition to being held in the archive, the pieces will occasionally be put on display in public buildings around the grounds of the 96-year-old park – as they are already from time to time. The archive center itself generally will be off-limits to the public and require park authorization for access, Brown said.

The collection has about 197,600 objects, 96 percent of which consist of archival records, such as documents and photographs, said P. Russell Shurtz, museum technician for Haleakala National Park. Continue reading ‘Archive planned at national park’

Extinction Countdown: Hawaii admits possible defeat to invasive species, researches “hybrid ecosystem” instead

Published on December 2, 2010 in General Ag News and Notes and Invasive Species.

The beautiful yet isolated Hawaiian islands hold a bounty of biodiversity, but many of those unique species are rapidly disappearing. The fast growth of invasive species is pushing native Hawaiian species, many of which are found nowhere else on the globe, into extinction. In fact, hundreds of Hawaiian plant species, along with dozens of mammals and insects and other species, already appear on the U.S. endangered species list.

Much of the landscape of Hawaii, especially lowlands near agriculture and cities, has already been transformed, with native species nowhere to be found.

“Invasive species are so prevalent. You’re hand weeding, trying to eliminate them and aren’t able to keep up with them. It feels like you’re fighting a losing battle,” Susan Cordell, research ecologist with the U.S. Forest Service, said recently in a prepared statement. “Restoring these lowland tropical forests to a historic native state is not financially or physically feasible.”

Invasive species are non-native species that disperse widely, rapidly, and at the expense of native species in an ecosystem. Not all non-native species become invasive, but those that do pose serious threats to all manner of plants, insects and animals.

So how can Hawaii preserve its biodiversity in the face of this ever-expanding enemy? A new idea is to try developing “hybrid ecosystems” – native and non-native species mixed in a way that benefits native biodiversity. Continue reading ‘Extinction Countdown: Hawaii admits possible defeat to invasive species, researches “hybrid ecosystem” instead’

Food sustainability: a Kona-vore’s dilemma

Published on November 28, 2010 in General Ag News and Notes and Sustainability.

by Diana Duff
Special To West Hawaii Today

Those of us in attendance at the November Kona Town Meeting on food sustainability were not surprised to see Ken Love as one of the speakers. A vigilant supporter of “buying local” and a long-time champion of growing exotic fruit for local consumption, his low blood pressure was obviously raised as he talked about the charade he finds in some local stores. Sellers anxious to join the “buy local” campaign are sometimes stretching the limits and confusing consumers who really want to eat food grown as close to home as possible.

Ken’s main prop was a box of “Hawaii Ginger” with “Produce of China” in smaller type on the same box. “So, is this local produce?” he asked. A resounding “no” echoed through the Makaeo Events Pavilion.

Ken advised those present to look for the COOL, or Country of Origin Label, stickers on produce. These can help you choose fruit and vegetables grown in locations that match your buying preferences. If you don’t see the stickers, ask for them.

Research shows that consumers often prefer locally grown produce, but they can be confused if produce is labeled incorrectly or not at all. Shoppers looking for local products are often deceived by misleading signage. Locally grown crops need to be marked clearly and correctly. “Hawaii Grown” stickers could really help. Continue reading ‘Food sustainability: a Kona-vore’s dilemma’

Stowaways found in largest Christmas tree shipment of the year

Published on November 28, 2010 in Christmas Tree, General Ag News and Notes and Invasive Species.

SAND ISLAND (HawaiiNewsNow) – Hawaii’s largest shipment of Christmas trees from the mainland is here.

On Sunday morning, inspectors combed through them and they found some creatures who came along for the joy ride.

A salamander, some tree frogs, and a cricket are among the hitchhikers in this season’s shipment of Christmas trees.

But after all the shaking, and searching for invasive species at Matson’s Sand island terminal, it was a slimy guy who triggered a red flag.

“We found several slugs and we’re concerned about it being a problem here to our agriculture industry, environment and also public health and safety,” said Glenn Sakamoto, Plant Quarantine Inspector with the Hawaii Department of Agriculture.

The state says the slug was found in 11 of the 62 containers.

The vendor has a choice. It can either treat the trees or send them back to the mainland.

This is the third shipment in three weeks.

In all, there are roughly 200 containers filled with more than 80,000 Christmas trees.

The state says that’s more than last year.

That’s because there was a shortage of trees, and people started air freighting them.

The state anticipates a bigger supply this year.

As for the little buggers, inspectors say if they have kamaaina family members, they get to stay in Hawaii. Continue reading ‘Stowaways found in largest Christmas tree shipment of the year’

To Bee or Not to Bee

Published on November 26, 2010 in General Ag News and Notes and Invasive Species.

By Glenn I. Teves, County Extension Agent, UH CTAHR Cooperative Extension Service

The relationship between humans and honeybees is ancient, as demonstrated by cave paintings in Spain, South Africa, and Nepal, depicting honey hunters collecting honey from wild hives. The honeybee was introduced to Hawaii in 1857, but the accidental introduction of the Varroa mite in 2007 puts this relationship in jeopardy and is one example of Hawaii’s vulnerability to invasive species.

The Varroa mite (Varroa destructor) is one of the most serious pests of honeybees and is associated with the spread of viruses and the decline of honey bee colonies on the mainland. And it’s only a matter of time before it destroys all feral honeybee colonies in Hawaii. On the island of Oahu alone, over 90 percent of the wild colonies have been wiped out and it has now moved to the Big Island, starting in Hilo. Visual checks of feral honeybees in Ho`olehua and Mo`omomi have not found the Varroa mite to date.

The mites attack both adult bees, and also larvae in the hive. Although honeybees in Hawaii are crosses between German, Italian, and Carnolian bees, the honeybees on Molokai appear to be a special disease resistant strain, first brought in around 1898. They show resistance to a disease called Foul Brood, which wiped out honeybees on most of the islands starting in 1908. Continue reading ‘To Bee or Not to Bee’

U.S. Forest Service receives $1.6M grant to study hybrid ecosystems in Hawaii

Published on November 24, 2010 in Agriculture Grants, General Ag News and Notes, Invasive Species, Native Hawaiian Plants and Sustainability.

Invasive species are so pervasive in Hawaii’s low-lying areas that the U.S. Forest Service says it’s not cost-effective or practical to eradicate them all. Instead, it’s launching new research into developing “hybrid ecosystems” that will incorporate some nonnative plants but allow native plants to thrive.

The service has received a $1.6 million grant from the Defense Department’s strategic environmental research program to study the possibility.

“Invasive species are so prevalent. You’re hand weeding, trying to eliminate them and aren’t able to keep up with them. It feels like you’re fighting a losing battle,” said Susan Cordell, research ecologist with the Forest Service. “Restoring these lowland tropical forests to a historic native state is not financially or physically feasible.”

Hawaii’s low-lying native trees and plants were wiped out by cattle, goats and other nonnative mammals that were set free to graze after the arrival of the first Europeans in the islands in the late 1700s. The animals trampled on ferns and undergrowth, drying the soil and tree roots. Later reforestation efforts resulted in the planting of fast-growing nonnative trees like eucalyptus instead of native trees.

To see intact native ecosystems, you have to climb high into the mountains.

Cordell said the grant will allow researchers to find ways for native species to “coexist” with some nonnative species. Continue reading ‘U.S. Forest Service receives $1.6M grant to study hybrid ecosystems in Hawaii’