Sunday, January 27, 2019

In findings published earlier this month in Ecological Applications, scientists from the University of Washington and Center for Ecosystem Sentinels examine the reason for the plummeting numbers of female Magellanic penguins, Spheniscus magellanicus, that have been reported at the birds’ breeding sites in South America over the past twenty years and more. Wikinews caught up with postdoctoral researcher and study co-author Natasha Gownaris to learn more.

In a press release, Gownaris said, “Two decades ago, there were about 1.5 adult male Magellanic penguins for every adult female at Punta Tombo[…] Today, it’s approaching three males for every female.” The findings suggested a disparity in the death rate of juvenile and adult penguins, rather than differences in chick survival, account for this difference.

Punta Tombo is one of the annual breeding sites for the species; it is in Argentina. The penguins travel thousands of miles each year to reach these sites.

The work involved building population models out of over thirty years of data collected by tagging individual penguins. Findings also suggested the pronounced sex disparity might make population models used to predict survival among other birds with a more even gender balance inappropriate for use on Megallanic penguins.

According to the data, since 1987, overall population of Magellanic penguins in Punta Tombo at one of their annual breeding sites in Argentina has declined 40%, while the male-to-female ratio has greatly increased.

Since 1983, the research team has been putting stainless steel bands on tens of thousands of chicks hatched at the Punta Tombo breeding site in Argentina, noting which juvenile and adult birds make it back to the site the next year and extrapolating how many lived and died. Among juveniles, there was a 17% survival rate for males and 12% for females. Among adults, it was 89% and 85%. These effects became compounded every year, reaching as high as six males to one female among older penguins.

The researchers noted implications for penguin conservation: Gownaris remarked, “Over the years, this team has helped preserve the land and waters around breeding colonies like Punta Tombo[…] But now we’re starting to understand that, to help Magellanic penguins, you have to protect waters where they feed in winter, which are thousands of miles north from Punta Tombo.”

Gownaris answered a series of questions for our correspondent.

((Wikinews)) What prompted your curiosity about Magellanic penguins?

Natasha Gownaris: I’ve wanted to be a marine scientist since I was a child, when I would collect sand crabs (Emerita talpoida) from local beaches in New York. I studied fish as a graduate student, but I have a pair of adopted parrots and I am generally fascinated by birds. Plus, penguins eat fish! Studying penguins seemed like a great way to merge my love for the ocean and my love for birds. Penguins and other seabirds are also important to study because they tell us something about the health of the ocean ecosystems they feed in, similar to the use of canaries to test air quality in coal mines. Unfortunately, the decline of many seabird species worldwide is yet another warning sign of the negative and widespread impacts humans are having on the ocean.

((WN)) How did you approach putting together such a large-scale study?

NG: This study started in 1982, long before my joining the lab in March of 2016. Dr. Dee Boersma began this study as a response to a Japanese company’s interest in harvesting penguins for their skin, meat, and oil. Although the project has evolved over time, Dr. Boersma had the foresight to start banding chicks in 1983 and to set up a standard protocol that we follow each year. Since then, over 44,000 chicks have been banded at Punta Tombo. We’ve been able to follow some individuals for 30+ years, collecting detailed information on things like how often they breed and how many mates they’ve had.

((WN)) How much time did you end up spending in Argentina? What was it like at the breeding site?

NG: Members of the Boersma lab and volunteers spend approximately six months each year at Punta Tombo. I was fortunate enough to spend nearly four months at the colony between 2015 and 2017. It’s an incredible, otherworldly place. Magellanic penguins nest in burrows or bushes, and some areas of the colony are so dense with burrows that you feel like you’re on a different planet. The colony has declined by over 40% since the study started…so I can’t even imagine what it was like in the 1980s. My favorite time of the day is around 8PM, when (hopefully fat) penguins are returning to the colony en masse after a foraging trip. They are also most vocal in the morning and evening, making their characteristic braying sound— the related African penguin earned the name “jackass penguin” because they sound a bit like donkeys. The colony is also full of other beautiful and interesting creatures, including a llama-like species called the guanaco and an ostrich-like species called the rhea.

((WN)) Do you have any theories on why more female juveniles die at sea? You mention starvation; what might be the causes of that, and are there other possible explanations you can think of?

NG: We are not yet certain why females are more likely to die, but we think it must be related to their smaller body size. Because the mortality is most uneven in juveniles, higher mortality doesn’t seem to be related to greater costs of breeding for females than for males. Female Magellanic penguins are about 17% lighter than males and have smaller bills. We think that, because of this size difference, females have a lower storage capacity, can’t dive as deep, and can’t take as wide a range of prey as males — all disadvantages when faced with limited and unpredictable food resources. These disadvantages hit juvenile females even harder, as juveniles are still learning how to forage and often travel further than adults do in the non-breeding season. Counts of carcasses in the species’ migration range support starvation as the main cause of female-biased mortality; while oiled carcasses have a sex ratio of 1:1, females outnumber males in carcasses of starved birds. The only other possibility is that females are moving to other colonies at higher rates than are males, but this species is known to almost always return to its natal colony to breed.

((WN)) You suggest conservation efforts should look at protection of feeding grounds. What sort of measures do you think might be beneficial?

NG: Because penguins migrate such long distances over the non-breeding season, a mixture of tools (including no-take marine protected areas and traditional fisheries management tools, like catch limits) is likely to be needed. Although there is currently some spatial protection surrounding the species’ breeding colony, this protection does not extend to their migratory route. And, of course, everyone can contribute to penguin conservation by reducing their plastic waste, making more sustainable food choices, and reducing their carbon footprint.

((WN)) What do you think might be causing pressure on food sources for the penguins?

NG: The two main threats to the food sources of this colony are climate change, which cause shifts in primary productivity and fish stocks, and fisheries. Fisheries compete with penguins for fish species such as hake and anchovy.

((WN)) Have you noticed differences in behavior among the penguins as the ratios become increasingly skewed?

NG: In a separate study currently under review, we have shown that aggression between males of Magellanic penguins is higher when the sex ratio at the colony is more skewed towards males. We also showed that nearly all females at the colony breed but that, over time, fewer and fewer males find mates. Single male penguins sometimes intrude [on] nests of mated pairs and interrupt the incubation of eggs or feeding of chicks, leading to mortality. In some cases, they will even attack and kill chicks.

((WN)) Your release mentioned sexing the penguins was problematic; how did you achieve it with confidence?

NG: We have some methods of sexing penguins that we feel confident about — using genetics or measures of cloaca size around egg laying, for example. However, these methods are time intensive, so we have also developed visual cues for sex penguins (bill size, behavior, forehead shape). We looked at individuals that had been sexed using both a certain method (e.g. genetics) and visual methods to calculate how often we got it right based on visual cues alone and found that we have very high accuracy. We also used statistical tools to help to deal with uncertainty in the sex of some individuals.

((WN)) How well can you extrapolate population trends at Punta Tombo based on the birds you tagged? More broadly, how well do you think this work represents global populations?

NG: It is likely that females have higher mortality than males at other colonies of this species and in other penguin species. We unfortunately do not have enough information from other colonies of this species (e.g. sex ratio and population trends) for an accurate global assessment of population trends. We do know that some colonies of the species are growing but that, at the global level, the species is still in decline.

((WN)) In your opinion, for how much longer are penguin populations sustainable without intervention?

NG: This is nearly impossible to answer without more information on other colonies of the species, but the Punta Tombo colony is declining rapidly. We estimate declines of at least 43% since 1987 from our annual surveys at the colony, but it is likely that actual declines are higher because of the increasingly skewed sex ratio.

((WN)) What are your next plans moving forward with your work?

NG: We are currently studying the sex ratio in Magellanic penguin chicks (at hatching and at fledging) to determine how this influences the sex ratio in adults. There are two priorities moving forward — 1) estimating sex ratio at other colonies of this species and determining whether females are more likely to leave Punta Tombo for other colonies than are males and 2) determining the mechanisms underlying lower female survival, e.g. by studying the foraging behavior and diet of males and females and the individual characteristics (like body size) that correlate with survival.

Saturday, September 17, 2005

A story about a man carrying over 30,000 (sometimes reported as 40,000) volts of static electricity in his body, allegedly generated by a wool sweater and nylon jacket combination, is circulating through major news outlets. The story, carried first by the Warrnambool Standard, says that the man, Frank Clewer, a 58-year old cleaner from Dennington, involuntarily created a scene by causing fire departments to evacuate three buildings where he had left his mark, before he realized he was causing the burn marks on carpets and allowed the fire department to help him.

The story has been picked up by The Register, Guardian, BBC, USA Today, Reuters, local agencies of ABC, the San Francisco Chronicle, and other news outlets.

Several unanswered objections mark the story as a possible hoax:

• Clewer enters and exits his car several times in the story — if he opened the car by touching its presumably metal lock, he would surely release some electricity into the car through his hand; everyone has at some point experienced the painful shock of touching a door handle or car keys to a lock. Though the car might not be grounded, it would still be at a lower potential and thus energy would be transferred. This would be noticeable; the story does not comment that Clewer understood what was happening to him.
• Firefighters supposedly “used a device to check static electricity on him and his belongings.” While firefighters would be likely to carry a high-voltage multimeter around to measure the current and voltage ratings of downed power lines, it is unlikely that the same device could measure such a large voltage resulting from a very small amount of static energy without de-electrifying it.
• For such a large voltage to be stored, humidity would have to have been extremely low on that day for the air around him not to ionize and source current, removing the static energy.
• If he was carrying such a large voltage, his hair would probably have stood on end, as this is a notable effect when one touches a Van de Graaf generator. Note: It is uncertain at what voltage this effect begins, and since Van de Graaf machines routinely exceed Megavolts of electric potential, this may not be a verifiable objection.
• This statement: “Firefighters took possession of Clewer’s jacket and stored it in the courtyard of the fire station, where it continued to give off a strong electrical current.” (Reuters UK) First, there is no reason they would need to take possession of the jacket — the static electricity could be dealt with by simply dumping water on it. Second, the jacket could not “give off” an electric current without some continuous source of energy, which, in storage, is impossible. It is possible that the jacket could hold a voltage, but the effects of this would not be visible — if they were, they would be short-lived as the jacket would lose its static energy. In any event, the current would be miniscule.
• The amount of energy stored on Clewer’s person and possessions could not have been more than a few Joules; this is unlikely to have burned carpet.

The equation for stored energy in capacitors is:

Where U = energy, C = capacitance, and V = voltage. A human body by itself typically has a capacitance of around 250 pF, which would mean a voltage of 30,000 V would produce energy of 0.11 joules. Even if Clewer’s possessions resulted in a parallel capacitance of 1 microfarad, this would still only result in an energy storage of 450 J. This amount of energy would be insufficient to burn carpet or char plastic, although a spark could ignite flammable vapor or gas.

Thursday, February 12, 2009

An article in the February 12 issue of the New England Journal of Medicine reports on an unusual cause for an outbreak of low blood sugar among men in Singapore: illegal use of sexual performance enhancement drugs that were contaminated with a diabetes drug.

Between January and May 2008, 149 men and one woman between 19 and 97 (mean age 51) were admitted to five public hospitals for unexplained low blood sugar. Similar cases were reported in media reports from Hong Kong. Seven Singaporean patients remained in a coma because of prolonged sugar starvation of the brain, and four subsequently died. The diabetes drug glyburide was found in blood and/or urine samples in 85% of cases; 30% admitted having used illegal sexual performance enhancers.

The contaminated products were a counterfeit version of the drug Cialis (meant for the treatment of genuine erectile dysfunction), and three purported herbal preparation (the affected brands included Power 1 Walnut and Santi Bovine Penis Erecting Capsule). All four preparations additionally contained Viagra in varying concentrations. Two herbal products contained traces of the weight loss drug sibutramine, a compound related to amphetamines.

The drug packaging mentioned names of non-existent overseas production facilities, so the source of the contamination with the diabetes drug could not be established.

The authors underline the risks that is known to be associated with purchasing drugs from unreliable providers or from online resellers. The clandestine use of impotence drugs as sexual performance enhancers seems to have provided a good illustration of this problem. They further call for more efforts by national and international health and law enforcement agencies to curb the manufacturing, international transport and sales of untrustworthy medication.

Monday, June 7, 2010

An acrobatic group known by the name of Spelbound has been declared as the winner of Britain’s Got Talent 2010, a televised variety talent show competition broadcast on ITV in the United Kingdom. As the winning act of the show, Spelbound have won £100,000 (US$144,580, €120,313, A$175,079) and a place at The Royal Variety Performance, an annual gala evening that is attended by senior members of the British Royal Family.

In no particular order, the top three acts were revealed to be two dancers known by their stage name of Twist and Pulse, gymnastic group Spelbound and Kieran Gaffney, whose act involves playing on the drum kit. After Kieran Gaffney was revealed to be in third place, Anthony McPartlin, who hosts Britain’s Got Talent with Declan Donnelly, said to Kieran: “Well done Kieran. Kieran, you’re a star, you came back, you got all the way to the final. I know you’ve loved this. You’ve loved this, haven’t you?” In response to this, Kieran Gaffney stated: “Thank you very much. Thank you, everyone for supporting me. Thank you.”

Shortly afterwards, on the episode that was broadcast live on ITV1 on Saturday, Anthony announced: “After tens of thousands of auditons, five semi-finals and an amazing final, this…this is it. One of you is about to walk away with £100,000 and a place at this year’s Royal Variety Performance. The winner of Britain’s Got Talent 2010 is…Spelbound!” Glen Murphy from Twist and Pulse commented about finishing in second place, stating: “Yeah, it’s amazing. I can’t even believe it. I can’t believe it at all.”

Alex Uttley, a 24-year-old member of Spelbound, commented on the gymnastic group’s victory, commenting: “Oh, my god. This is unbelieveable. We just want to say thank you to everyone out there. It just shows that all our hard work has paid off.” One of the coaches of Spelbound, named Neil Griffiths, stated about Spelbound: “Oh, they’ve worked so hard over the last few weeks. Um, since the semi-final, we…we really had to pull out the stops to try and up the game. They’ve not known they’ve worked in the gym from six in the morning till twelve…twelve o’clock of the night. I couldn’t have asked for more. Um, it’s a team of coaches. I don’t take all the credit myself. There’s, uh, two people up there that know who they are who’ve been fantastic.”

Spelbound consists of 24-year-old Alex Uttley, Nicholas Illingworth, aged 24, Adam Buckingham, aged 21, 20-year-old Adam McAssey, 19-year-old Douglas Fordyce, 18-year-old Edward Upcott, 18-year-old Leighanne Cowler, 17-year-old Katie Axten, 17-year-old Lauren Kemp, 15-year-old Jonathan Stranks, Abigail Ralph, aged 15, 13-year-old Hollianne Wood and Amy Mackenzie, aged 12. Bookmakers had previously predicted that Spelbound would be the most likely act to become the winner of the series.

The running order for the final started with Twist and Pulse. The second act to perform was Liam McNally, a 14-year-old singer. The running order subsequently continued with 40-year-old impressionist Paul Burling, singer Christopher Stone, aged 28, Tina & Chandi, a woman and dog dancing act, Connected, a five-piece singing group, Kieran Gaffney, aged 12, 22-year-old Tobias Mead, a dancer, 80-year-old singer Janey Cutler and Spelbound in that particular order.

Earlier on in the final, Britain’s Got Talent judge Amanda Holden has stated to Spelbound: “We are hosting the 2012 Olympics and I think ‘what a brilliant opening act’.” Fellow judge Piers Morgan also commented that “[t]he purpose of this show is to identify hidden great British talent. You are that act.” After Spelbound won in the final, another judge, named Simon Cowell, stated that “the right boys and girls won on the night” and that he could “only say on live TV that that was one of the most astonishing things I have ever seen. Seriously.”

April 7, 2005

The state Premier of Western Australia (WA), Dr Geoff Gallop, gave an apology to children physically and sexually abused in institutional care within the state between the 1920s and 1970s. The statement was given in reaction to an Australian Senate inquiry into institutional child abuse published last year.

“We acknowledge our state’s history, the role played by the state in providing care for children and particularly past practices in the provision of care,” Dr Gallop told Australian Associated Press.

“We apologise to all those people who were harmed as children while in institutional care, and express deep regret at the hurt and distress caused. We recognise that the effects of physical, psychological and sexual abuse did not end when these children became adults.”

Many of the children had been placed in care by government agencies.

“Overwhelmingly, the (submissions) make tragic and distressing reading. They tell of neglect, of shocking abuse, of predatory behaviour from so-called carers and of criminal activity,” Senator McLucas told federal parliament at the time of the Forgotten Australians report, last year.

“The evidence is also there that authorities in the church and in governments either knew or should have known that much of this horrific activity was occurring.”

The inquiry found that an apology was an important symbolism in recognising past wrongs and helping victims gain closure, according to an ABC News report. And Dr Gallop said the victims’ personal histories must be heard and acknowledged in order to build a better care system for the future.

WA’s Community Development Minister, Sheila McHale, said those wishing to find out about their time in care in WA as children should contact the Department for Community Development, which is also providing counselling services to those who were abused in an institution.

Sunday, August 21, 2005

A robotic system at Stanford Medical Center was used to perform a laparoscopic gastric bypass surgery successfully with a theoretically similar rate of complications to that seen in standard operations. However, as there were only 10 people in the experimental group (and another 10 in the control group), this is not a statistically significant sample.

If this surgical procedure is as successful in large-scale studies, it may lead the way for the use of robotic surgery in even more delicate procedures, such as heart surgery. Note that this is not a fully automated system, as a human doctor controls the operation via remote control. Laparoscopic gastric bypass surgery is a treatment for obesity.

There were concerns that doctors, in the future, might only be trained in the remote control procedure. Ronald G. Latimer, M.D., of Santa Barbara, CA, warned “The fact that surgeons may have to open the patient or might actually need to revert to standard laparoscopic techniques demands that this basic training be a requirement before a robot is purchased. Robots do malfunction, so a backup system is imperative. We should not be seduced to buy this instrument to train surgeons if they are not able to do the primary operations themselves.”

There are precedents for just such a problem occurring. A previous “new technology”, the electrocardiogram (ECG), has lead to a lack of basic education on the older technology, the stethoscope. As a result, many heart conditions now go undiagnosed, especially in children and others who rarely undergo an ECG procedure.

Saturday, June 2, 2007

Thirty-five square kilometers, or 13.5135755 square miles, or 3,500 hectares or 8,648.68835 acres.

However you figure it, it’s a sizeable chunk of land.

And it’s missing from Cambodia on the website for the Association of Southeast Asian Nations, or ASEAN, a 10-member regional body of which Cambodia is a member.

The apparent rounding down of Cambodia’s territory, 181,035 square kilometers, on the ASEAN website, has some Cambodian lawmakers up in arms.

Parliamentarian Keo Remy, a member of the opposition Sam Rainsy Party, is calling for the ASEAN website to be blocked by Cambodia’s Ministry of Posts and Telecommunications if the number is not corrected.

“We know that Cambodia has border disputes with its neighbors, and Khmer citizens are paying attention on these issues. We cannot accept such incorrect points. The most important thing is that the government should close this web site,” Keo was quoted as saying by the Khmer-language daily newspaper Kampuchea Thmey.

Though Keo acknowledged the error could be an honest, if careless, mistake, he said it could mean something more sinister – that ASEAN is trying to undermine Cambodia’s sovereignty, and that perhaps ASEAN is working for neighboring nations. It could even be treasonous, he said.

“If it was intentional and perpetrated by a Cambodian, this is treason. It is like not knowing your own parents,” Keo was quoted as saying by Deutsche Presse-Agentur.

Other lawmakers also called on the Cambodian government to take action.

“The royal government must react urgently, especially the Ministry of Foreign Affairs and International Cooperation,” Monh Saphan, a Funcinpec parliamentarian was quoted as saying by Kampuchea Thmey. “The website [must] be corrected, because it affects the territorial integrity of the Kingdom of Cambodia.”

And non-governmental organization leaders weighed in.

“The state’s figure is more important and appropriate than figures of other organizations. Therefore, we should urge the government to check this issue,” Seng Theary, executive director of the Center for Social Development, told Kampucha Thmey. “We also wonder where ASEAN got this figure.”

Kek Galabru, president of the Cambodian League for the Promotion and Defense of Human Rights, said that incorrect figure is most likely a mistake, but said the government should investigate it. “Otherwise a small problem might turn into a bigger issue,” she said.

Government spokesman and Information Minister Khieu Kanharith said he would investigate, and called for cooler heads in the meantime.

Border disputes are a hot-button political issue in Cambodia, which has some long-standing unresolved boundary conflicts with neighbors Thailand and Vietnam.

Cambodia joined ASEAN in 1999, the last country to gain admittance to the regional geo-political and economic body for Southeast Asia. It was founded in 1967 by Indonesia, Malaysia, the Philippines, Singapore and Thailand. Other members are Brunei, Laos, Myanmar and Vietnam.