Ravens found able to remember people who tricked them up to two

first_imgCredit: CC0 Public Domain More information: J.J.A. Müller et al, Ravens remember the nature of a single reciprocal interaction sequence over 2 days and even after a month, Animal Behaviour (2017). DOI: 10.1016/j.anbehav.2017.04.004AbstractTo explain reciprocity, direct or indirect, several proximate mechanisms have been proposed, yet little attention has been given to the specific underlying cognitive mechanisms. Regardless of what proximate rules underlie reciprocity, some kind of memory would be paramount. Corvids in general, and ravens, Corvus corax, specifically, have been shown to possess an array of sophisticated cognitive mechanisms involved in memory. In this study, we tested the memory of nine ravens in an exchange paradigm where they could exchange a low-quality for a high-quality food item. Specifically, we tested whether they remembered who was a reliable ‘fair’ experimenter and who would not reliably exchange (the ‘unfair’ experimenter), and whether they would subsequently choose to interact with the former when given the choice. In addition, we tested whether ravens that observed the initial seeding of information about who was ‘fair’ or ‘unfair’ could transform bystander information into first-person interactions, i.e. also preferring to interact with the ‘fair’ experimenter when given the choice. The results show that ravens with first-hand experience were more likely to interact with experimenters with whom they had had a positive previous experience, and that this memory lasted at least 1 month. In contrast, observers did not distinguish between the experimenters when given the choice to interact with them. Previous first-hand experience with the paradigm, however, seemed to help observers to be more successful in solving the task, albeit not significantly above chance. In sum, this study shows memory for direct reciprocity in ravens, and tentatively suggests memory for indirect reciprocity. Accordingly, these results provide hints for the underlying mechanism of memory in raven social interactions. Most everyone knows that birds belonging to the corvid family are smart—magpies are notorious for their antics, as are crows. In this new effort, the researchers devised and conducted experiments designed to test whether ravens are capable of understanding different negative behaviors from different people, whether they are able to respond, and if so, for how long.The experiments consisted of training tame ravens to offer one treat to a person in exchange for a better treat; sometimes, the person offering the treat would cheat the bird out of their reward. Each of seven birds was given a bit of bread, which they like to eat. But then each was given the opportunity, like contestants on Let’s Make a Deal, to exchange their measly bread chunk for a hunk of cheese, which they like much better. Once they had the routine down, the humans changed things by occasionally cheating a raven out of its treat. When the bird offered up its bread, the human took it, then ate both the bread and cheese. To provide for comparison purposes, only some of the humans cheated the birds and two additional birds were allowed to watch the proceedings but not participate.The researchers report that two days after the initial trials, the birds that had been duped refused to trade with those people that had duped them, opting instead to haggle only with fair or neutral traders (people not involved in the original exchange). The observer birds showed no preference. The team reports further that two months later only one of the birds was willing to trade with a person that had deceived them earlier. The study shows, the researchers claim, that the birds are capable of understanding when they have been cheated and associating that with a single individual. It also shows they have a long memory. Such skills, they note, likely come in handy in the wild as the social birds deal with transgressions of their peers. This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. Citation: Ravens found able to remember people who tricked them up to two months later (2017, June 8) retrieved 18 August 2019 from https://phys.org/news/2017-06-ravens-people-months.html Ravens cooperate—but not with just anyone Journal information: Animal read more

Merging borders

first_imgHoping to foster a more open and interactive culture of electronic music performance, the Border Movement Lounge is a Goethe-Institut funded platform that showcases established and upcoming artists and producers from across South Asia. The lounge is an informal event happening at Hauz Khas Social on 29 October. Each edition of Border Movement Lounge focuses on a different area of the region, partnering acts with local talent and this year’s edition will focus on Bangladesh. This year’s lineup include the Space/Ghost from Bangladesh and Big City Harmonics and When Pandas Attack from India. Also Read – ‘Playing Jojo was emotionally exhausting’Border Movement is a platform that aims to encourage interaction between the electronic music scenes of South Asia and Germany. A common initiative of the Goethe-Instituts in South Asia and a project realised in an alliance with regional partners Wild City.  Performing on Wednesday, Space/Ghost is a Dhaka based solo electronic project. Although a classically trained pianist, French electronica moves him the most. Big City Harmonics is the solo project of Rohan Hastak – a former guitarist turned live electronica act. When Pandas Attack is a Delhi-based graphic designer Ankur Chauhan’s solo project. It started about 3 years ago, with a desire to put down thoughts quickly, a form of creative note keeping. Messing around with recording guitar parts for a while, he progressed to making full tracks without any actual instruments. This experiment gained momentum once he connected electronic music with an organic soundscape.WHERE : Hauz Khas SocialWHEN:  29 Octoberlast_img

Bengal police sufficient for peaceful polls says top brass

first_imgKolkata: Stating that steps have been taken to avoid even stray incidents during and ahead of the Panchayat election, Anuj Sharma, the Additional Director General of Police (Law and Order), said: “The West Bengal Police is sufficient to conduct a peaceful and fair Panchayat poll.”He has also stated while addressing the Press in the state secretariat that all political parties are getting equal chances to file nomination without any hindrance.Sharma said: “It is being shown in a section of media that nobody can file nomination as trouble is taking place at different places. It is also being shown that some political parties are not being able to file nominations there. But I would like to say that the facts and figures collected from the districts show that overall, all parties are getting chances to file nominations.” Also Read – Heavy rain hits traffic, flightsGiving data on the number of nominations filed, showing that all political parties are getting equal chances in filing nomination, he maintained: “In the last two days in Gram Panchayat level, 1,614 nominations have been filed by All India Trinamool Congress, while other political parties have filed 1,692 nominations. It shows that all political parties were being able to file nominations.”When asked whether there is a need of the Central forces to conduct the probe, Sharma said: “No, the state police are sufficient in conducting free, fair and peaceful election.” Also Read – Speeding Jaguar crashes into Merc, 2 B’deshi bystanders killedHe further said that the nomination process is going on smoothly at the moment and to maintain the same, they are sending additional police forces.In connection with the stray incidents that took place in some places, Sharma said: “Some incidents have taken place and it has been taken note of. There are 48,500 Gram Panchayat seats and incidents have taken place in some of the places. Cases have been started and legal action will also be taken against the people involved in these incidents.”He further said that instructions have been passed to superintendents of police and commissioners of concerned police commissionerates to take all necessary steps, so that nomination process is completed peacefully.”There is strong police arrangement and it has been instructed to further increase the vigil where it is required,” he maintained.It may be mentioned that police have taken adequate steps with regard to an incident of a journalist being attacked in Cooch Behar on Wednesday.last_img

Do you check your smartphone often You may be impulsive

first_imgPeople who frequently check and re-check their smartphone are driven most strongly by uncontrolled impulses and are less apt in delaying gratification, says a study.Psychologists Henry Wilmer and Jason Chein from Temple University in the US carried out the study to develop better understanding of the impact of smartphone and mobile technology usage to assess the potential problems associated with heavy use. The researchers gave 91 undergraduate students a battery of questionnaires and cognitive tests. They indicated how much time they spent using their phones for social media purposes, to post status updates and to simply check their devices.  Also Read – ‘Playing Jojo was emotionally exhausting’Each student’s tendency to delay gratification in favour of larger, later rewards was also assessed. They were given hypothetical choices between a smaller sum of money offered immediately or a larger sum to be received at a later time. The results, published in Springer’s journal Psychonomic Bulletin and Review2, provided evidence that people who constantly check and use their mobile devices throughout the day are less apt to delay gratification.“Mobile technology habits, such as frequent checking, seem to be driven most strongly by uncontrolled impulses and not by the desire to pursue rewards,” Wilmer noted.The findings provide evidence that increased use of portable electronic devices is associated with poor impulse control and a tendency to devalue delayed rewards.last_img

An Ode to Nataraja

first_imgKnown globally for their rare excellence and perfection of technique, Raja and Radha Reddy complete 50 years in the art of Kuchipudi this year. The duo is solely responsible to help bring the Indian classical dance form of Kuchipudi to the cultural map of the world. “I m very proud and happy, this is the happiness that we get after completing 50 years in the divine art of Kuchipudi. It’s not only me, but Radha, Kaushalya and my 2 daughters are very proud of the moment,” says Raja Reddy. Trained by eminent Kuchipudi dancers, Sri Vedantam Prahlada Sarma and Sri PVG Krishna, for Raja Reddy, the love for kuchipudi came at an early age and Radha followed his path after their wedding. Also Read – Add new books to your shelfThey became the first Indian dancers to perform at the International Dance Festival of Avignon in France and Salzburg (Austria) and the Festivals of India in the USA, UK and Bangladesh. In Japan, the Reddys were two of the twenty –two star dancers from across the world invited to perform at The All-star Ballet Gala Festival.For the last 20 years, ‘Natya Tarangini performing arts,’ established by Raja Radha Reddy has been organizing its annual “Parampara Series – The National festival of Music and Dance” to promote the Indian dance and music. As Padma Shree and Padma Bhushana Raja Radha Reddy complete their 50 years of service to the field of Indian classical dance form – Kuchipudi; they attribute their success to Lord Shiva on the occasion of Mahashivaratri on February 24. Also Read – Over 2 hours screen time daily will make your kids impulsiveRaja Radha Reddy and Kaushalya Reddy are organising an ode to Nataraja – an all night concert series at the Natya Tarangini Performing Arts Centre, which had been formed forty years ago by the Reddys in order to train innumerable Indian classical dance lovers around the world.Mahashivaratri is the most important festival for the devotees of Lord Shiva. The festival has been accorded a lot of significance in Hindu mythology. It says that if a devotee sincerely worships Lord Shiva on the auspicious day of Shivratri then that person is absolved of all sins and attains moksha. Known as “Black Shiva” all over the world, Raja Reddy said, “During my childhood, we used to sing and dance for the whole night in the praise of Lord Shiva and we want to maintain our country’s tradition in the national Capital as well and this is the reason of our celebration on the occasion of Mahashivaratri.” The Mahashivratri concert will be presenting gems of classical dance and music such as Raja Radha Reddy, Ashwini Bhide, Rajendra Gangani, Aditi Sharma, Vagesh, Yamini and Bhavana Reddy and many talented youth from the field of dance and music as they perform Shiv Aradhana at the NatyaTarangini building premises in Saket at 8:30 pm. The featured artists will be dedicating their performances to Lord Shiva by showing different aspects of his existence in the form of various episodes of Lord Shiva’s leelas such as NeelKantha showing how he consumed poison to save people during samudra manthan; or the story of a boy whose life was protected by Shiva.last_img

Senior citizen found dead inside flat at Ballygunge

first_imgKolkata: An elderly person identified as Suvrajit Roy (70) was found dead inside his own flat at Ballygunge Place on Wednesday night. Locals informed police regarding the same as he had not been seen since Wednesday morning.Sources informed that on Wednesday night, Gariahat police station received information from the residents of 78, Ballygunge Place that one of the residents of their apartment was not responding despite repeated knocks on the door. Also Read – Bose & Gandhi: More similar than apart, says Sugata BoseUpon receiving the information, police reached the apartment and went to the flat located on the third floor. Police personnel also knocked on the door multiple times but found no response. Later, sleuths broke the door open and found Roy lying on the floor unconscious. He was immediately rushed to SSKM Hospital, where doctors declared him brought dead. Later, the body was sent for autopsy examination. Locals informed that Roy was a bachelor and used to live alone in the flat. He had also been suffering from heart disease for a long time. No marks of injury could be found on his body during preliminary investigation. It is suspected that he died due to a massive cardiac arrest on Tuesday night. Though no foulplay is suspected, sleuths are waiting for the autopsy report as the cause of death can only be determined then. If any foulplay is noticed in the report, an FIR will be initiated and the matter will be investigated as a criminal case.last_img

7th International Theatre Festival kickstarts in Kolkata

first_imgThe 7th International Theatre Festival, organized by Kalindi Bratyajon, was officially inaugurated by the State Minister of Power, Sovandeb Chattopadhyay in the august presence of the Director of Embassy, Cultural Relations, Italy, Dr. Andrea Baldi and Regional Director, ICCR, Goutam De. Sovandeb Chattopadhyay congratulated the festival convener, Bratya Basu for taking such a huge and praiseworthy initiative each year for presenting a week-long global theatrical extravaganza before the theatre lovers of Bengal. Also Read – Add new books to your shelfThe audience was enthralled by the inaugural songs presented by Bachchan Sau, a very talented visually challenged singer. This was followed by the first theatrical performance from The Teatro nel Baule, Italy, a theatre company which does research on physical theatre – mime, pantomime, comedy of art and dance. There were two scintillating performances, one was Scetch and Scotch and the other Two. Simona Di Maio and Luca Di Tomasso deserve a special mention for their outstanding non-verbal display of physicality on stage.last_img

Reliving the glory of Balgandharva

first_imgOn the occasion of the fiftieth death anniversary of famous Marathi theater actor and singer Bal Gandharva, Rajkamal Prakashan and Delhi Marathi Foundation launched the Hindi translation of his biography ‘Balgandharva;’ at Sahithya Akademi Hall, Rabindra Bhavan.Balgandharva is the Hindi translation of the book ‘Asa Ha Bal Gandharva’ which was originally written in Marathi by Abhiram Bhadkamkar, who also happens to be the scriptwriter of biographical Marathi movie Balgandharva. The book is translated in Hindi by Gorakh Thorat, Professor at SP college, Pune and published by Rajkamal Prakashan. This novel is the biography of Narayan Shripad Rajhans, who got the title of Balgandharva from Bal Gangadhar Tilak after hearing him sing at a very young age and from then onwards he was known by the same name. He was also the first person in the country to receive Balgandharva Sangeet Natak Akademi Award. Also Read – Add new books to your shelfAt the book launch, Vinay Sahasrabuddhe, MP Rajya Sabha and President, Indian Council for Cultural Relations along with Kirti Shiledar, stalwart of Marathi sangeet natak, Ram Gopal Bajaj, senior theater personality, Deepak Karanjikar, actor and writer, Professor Gorakh Thorat, Satyanand Nirupam, Editorial Director of Rajkamal Prakashan Samuh and Abhijit Godbole from Delhi Theatre Foundation paid glowing tribute to Bal Gandharva. Also Read – Over 2 hours screen time daily will make your kids impulsiveSpeaking on the occasion, Vinay Sahasrabuddhe President, Indian Council for Cultural Relations said, “All the works of Abhiram Bhadkamkar are exceptional and the magic he creates with his writing is sensational. Translating Balgandharava into the Hindi language is a historic step, and we look forward to see this book being translated into other languages as well.” He also said that he would take the initiative along with the help of others to bring this book to the World Hindi Conference. The author of the novel, Abiram Bhadkamkar, said, “There are many such aspects of this novel on which Marathi society does not want to talk about. While writing this biography I experienced such a beautiful forest of talent that even now I have not been able to get out off. He was born in theater and he had spent his whole life on stage. Through this biography, I am just able to show a very small part of his life”.Ramgopal Bajaj senior artist said, “Balgandharva’s actions and the devotion towards theatre dragged me on this stage, and I consider myself fortunate enough to have a chance to speak on Balgandharva’s death anniversary.”Kirti Shiledar, a well-known Marathi actress, said, “Theatre has seen the good days only in the era of Balgandharva Natak Mandali.”last_img

Anubha Ganguly proves age is just a number

first_imgBraving the barrier of age and ailment, the first CD containing folk songs by 83-year-old Anubha Ganguly will be released on June 7, in Kolkata by Governor KN Tripathi.At the age when most people complaint of ill health and loneliness, Ganguly’s amazing energy and undaunted courage stand as a source of great inspiration to the singers and musicians, who are much junior to her in age. The CD contains 10 popular folk songs including ‘Longor Chariya Naoer’, ‘Ki Ajob Karigor’, ‘Prem Janena Roshik Kalachand’, ‘Hosti Konya Hosti Konya’, ‘Kanai oo Kanai’, ‘Kunchboron shundor konya’, ‘O amar dorodi’, ‘Loke Bole Bolbe’, ‘Emon Premer Nodite Soigo’, ‘Ore Ore sundoira naoer majhi’. Also Read – Add new books to your shelfGanguly joined Gananatya Sangha, where she came in contact with the king of folk songs – Nirmalendu Chowdhury and became his first student. Her husband Gokulchand and brother –in- law also joined the choir. She took part in many shows and enthralled the audience. Undoubtedly, music was Anubha’s, first love. Though born in a well-settled family, Anubha being daughter of a cook, took her intial lessons in music from Krishna Chandra Dey – popularly known as KC Dey – who happened to be the uncle of Manna Dey. Dey had a baritone voice was a great exponent of Kirtan. Later, she learned music under the mentorship of renowned music teacher Yamini Gangopadhyay. Also Read – Over 2 hours screen time daily will make your kids impulsiveAnubha’s son actor-singer Arindam Ganguly said that despite being the mother of three children, which kept her busy looking after the day to day duties, she kept pursuing music and balancing her personal and professional life quite well. “This CD is my tribute to her,” he said. It was Biswa Roy, Head of Bhavna Cassettes and Records, who mooted the idea of making a CD of folk songs by an octogenarian vocalist, that will stand as an inspiration to the present day folk artists. Ganguly did not turn down Roy’s proposal, and yet has presented to us a unique CD with the inimitable style of singing.last_img

Recreating 1939 American black comedy

first_imgOriginally set in New York with a drama critic and his family which loves to kill, American playwright Joseph Kesselring’s 1939 play ‘Arsenic and Old Lace’ has been adapted worldwide. Closer home, its Indianised version is set in a Mumbai suburb, and is delivered in “Anglo-Indian Hindi lingo”. Director Nayana Sagar’s play by the same name revolves around the protagonist Bobby D’silva who is stuck with two aunts who kill old men by slipping arsenic into their wine, a nephew who doubles up as psychopath killer, and another who mistakes himself as Adolf Hitler. The play script was also adapted for an American film in 1944. Also Read – Add new books to your shelfWhat makes it such a timeless play? “This play fascinates me, for it works on many levels – the plot, the characters’ motives, the story’s motive, the conflict that drives the story as well as the individual characters is woven so seamlessly into the story. Although the genre is of a macabre dark comedy, the story infuses a lot of optimism and hope in the reader,” Sagar said. The farcical black comedy has been Indianised and adapted into Hindi by Ranjit Kapoor. Also Read – Over 2 hours screen time daily will make your kids impulsiveSagar has translated the vernacular Hindi language into an ‘Anglo-Indian Hindi lingo’ spoken by the Christians of Vasai, a far suburb of Mumbai where the protagonist of the play Bobby D’silva and his family are based. “The art effects and set props are imaginatively used to recreate a vintage look of the abode of D’silva family who are probably one of the original Christian suburb settlers, their home is over 100 years old and the set emulates this. The light design highlights the macabre mystery of the plot premise,” said Sagar. The Shri Ram Centre for Performing Arts (SRCPA) staged ‘Arsenic and Old Lace’ on August 10 – 11.last_img