Connect with us

World

King penguins sleep with an ear out for predators

Published

on

King penguinsLondon : King penguins can distinguish between dangerous and benign sounds, even when they are asleep, new research says.

King penguins are the second largest species, after emperor penguins. They are 70 to 100 cm tall and weigh 11 to 16 kg.

King penguins who become exhausted after long diving sessions and sleep on the beach constantly keep an ear out for incoming threats from large predators like orcas and giant petrels.

For the study, the team played different sounds to the sleeping penguins to observe their reactions.

“When we played single tones to sleeping penguins, they woke up with little reaction. However, playing them the calls of orcas or skuas caused them to wake up and flee,” said Tessa Abigail van Walsum, doctoral student at University of Roehampton, in Britain.

The ability of these birds to respond differently upon waking up suggests that they might sleep with just one half of their brain, while keeping a close watch with the other half similar to some migratory birds – essentially “keeping an eye open,” said the paper appearing in the Society For Experimental Biology.

Penguins also had strong reactions to some non-predator sounds like those of elephant seals.

“The sounds of approaching elephant seals rang big alarm bells for the penguins,” van Walsum added.

On the other hand, playing them the sound of unfamiliar predators, such as a dog’s growl, got little reaction when they awoke, the researchers said.

“This research helps us to understand the survival strategies of king penguins in their natural habitats,” explained van Walsum.

 

Continue Reading

World

Lockdowns in China Force Urban Communities to Defy Censorship and Vent Frustration Online

Published

on

By

Anyip Mobile Proxies

Shanghai’s rich middle class is leading a wave of online dissent over the strict and prolonged lockdowns imposed in various parts of the country. Chinese internet censorship is struggling as patience is wearing thin in many urban centers, coming up with creative forms of online protests.

Social Media Posts Revealing Lockdown Tension in Shanghai

Drawn-out lockdowns are nothing new in China as authorities insist with the nation’s zero-Covid policy since the start of the pandemic. Currently over This time around, however, metropolitan areas like Shanghai are increasingly difficult to keep quiet, given that its more than 25 million residents have seen weeks of total isolation along with food shortages and many other service interruptions.

Dozens of towns and reportedly over 300 million Chinese citizens have been affected by lockdowns of different severity. As expected, urban netizens have been most outspoken over their difficulties by finding creative ways to get around state censorship and bans placed on topics, news comments and spontaneous campaigns.

Shanghai residents have been using mobile proxies and hijacking seemingly unrelated hashtags to talk about healthcare issues, delivery failures and the overall severity of their situation. The “positive energy” that the Chinese government wants to transmit during the recent prolonged series of lockdowns does not come naturally to those counting food supplies and online censors are working hard to filter words, trending topics and undesired social media sharing.

WeChat groups and message threads are under constant monitoring. Posts questioning the zero-Covid approach have been quickly deleted, including by leading Chinese health experts like Dr. Zhong Nanshan. Video footage is soon censored and protests and investigations are quickly made to disappear.

Where this has not worked, officials have exposed banners with warnings and outright threats like “watch your own mouth or face punishment”, while drones have been patrolling the city skies. Yet, if anything, this has led to further tensions and unspoken confrontation with Shanghai’s educated and affluent middle class.

Creative Online Solutions Harnessing Civic Energy

Announcements by Chinese social media that they would be publishing the IP addresses of users who “spread rumors” have not helped either. Tech industry research has shown that much of Asia’s tech-savvy population has a habit of using mobile proxies and other privacy tools, quickly finding workarounds to browse the internet freely and talk to the world about the hottest topics.

The sheer volume of forbidden posts is already a challenge for the very censorship system, experts explain. Unable to track all trending hashtags, state workers overlook topics that speak about the US, Ukraine or other popular news. Linking human rights elsewhere to their situation, Chinese online dissidents establish their informal channels and “hijack” the conversation to share personal or publicly relevant information about the Covid suppression in their town.

Sarcastic and satirical posts still dominate. Others hope to evade the censors by replacing words from famous poems or the national anthem. One thing is certain – social media, when harnessed with the right creativity, has proven its ability to mount pressure on the government in even some of the most strictly controlled tech environments like China.

Continue Reading

Trending