Jumping Spider found to feed on insect eggs
►Spider’s newly discovered behaviour photographed for the first time.
►Social media helped in the discovery of the behaviour.
►The discovery is significant as it can help in biological methods of pest-control.
►Dr. Krishna Mohan, a Dakshina Kannadiga, is one of the experts involved in the study.
At a time of widespread complaints regarding misuse of social media by people, here is a heartening story of how social media served a useful purpose in advancing scientific knowledge about a unique species of spiders. Thanks to a sharp observation made by a Facebook user, one of the largest social media platforms in the country, an endemic South-Asian species of jumping spider, Hyllus semicupreus has been discovered to feed on insect eggs for the first time ever.
This behaviour is a new discovery for the species and has been reported by a team of researchers based in Mumbai, based on the inputs provided by a wildlife photographer from Andhra Pradesh. The discovery is significant as it can help in furthering biological means of pest control.
The discovery is published in the latest issue of 'Peckhamia', a globally renowned, peer-acclaimed international scientific journal dedicated to the study of jumping spiders. The study was collaborated with Dr. David E. Hill, a world authority on jumping spiders, and Dr. Richard J. Pearce, a leading British spider expert. It was led by principal author and lead researcher Javed Ahmed, along with co-researchers Rajashree Khalap and Dr. Krishna Mohan, who is a naturalist and surgeon based in Moodabidri. The discovery was reported by wildlife photographer AN Suresh Kumar, who first recorded this behavior and shared his observations with the team.
THE DISCOVERY
Hyllus semicupreus is a large, colourful bronze-colored jumping spider. It was previously recorded for the first time from Mumbai in 2015 and also been photographed across Maharashtra, especially in Raigad district. The spider can be easily identified from photographs and is known to feed on small insects and such.
Recently, and for the first time, wildlife photographer and amateur naturalist AN Suresh Kumar came across the spider feeding on leaf-footed bug eggs (familyCoreidae) on his farmland in Andhra Pradesh. Not knowing, he had clicked a new behavior and shared the photographs on the "Spiders of the Indian Subcontinent", a specialist Facebook group which is focusing on the documentation, identification and study of Indian spiders.
The photographs were spotted by arachnologist and researcher, Javed Ahmed. Realizing the importance of this chance discovery, Ahmed encouraged the photographer to contribute his findings to science to facilitate a better understanding of spiders, which are severely understudied in India compared to other wildlife species such as butterflies, birds and mammals.
'Oophagy' or preying on eggs is an interesting behavior, which, while reported in a number of jumping spiders, has never before been observed in Hyllus semicupreus, a relatively common jumping spider. This discovery is significant because leaf-footed bugs are severe agricultural pests and spiders such as Hyllus semicupreus can be acted as important pest-control agents.
Acknowledging the potential use of social media, Javed Ahmed observes: “In this digital age of lighting fast internet connections and powerful pocket computers (smart phones), which are carried by almost everyone, there's a lot of potential for social media platforms to act as a bridge between scientists and hobby photographers, to bring to light unique observations on the natural world never seen before. An important thing to remember though is, these observations, if not reported on an academic platform, such as a peer reviewed scientific journal, would be otherwise useless and lost forever.”
Photos: A. N. Suresh Kumar
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Shocked by PM’s remarks on Shakti scheme causing loss to metro: Shivakumar
Bengaluru (PTI): Karnataka Deputy Chief Minister D K Shivakumar on Saturday said that he is "shocked" by the reported statement of Prime Minister Narendra Modi that the "Shakthi scheme had resulted in loss of revenue for the Bengaluru metro".
Under the 'Shakti' scheme implemented by the Siddaramaiah-led Congress government, women can avail free travel in state-run buses.
Hitting out at Modi, the state deputy chief minister said that the prime minister lacks information on the Shakthi scheme and hence he has said that it has impacted revenues of the Bengaluru metro.
"Namma metro has earned a revenue of Rs 130 crore in the last one year. Footfalls too have gone up by 30 per cent for the same period. Bengaluru metro is limited to Bengaluru, while the Shakthi scheme is rolled out, keeping in mind people from across the state," he told reporters here.
The Shakthi scheme is rolled out by the Congress to ease the burden of price rise and inflation on women, Shivakumar said.
"Metro is a joint initiative between the State and the Centre and it has done well over the last one year. Someone seems to have provided incorrect information to the prime minister," he added.
"I would like to convey to the PM that the Karnataka State Road Transport Corporation (KSRTC) and Bengaluru metro are being run efficiently while offering the Shakthi scheme to women. Women are taking 60 lakh trips per day in Karnataka. They are very happy with the Shakthi scheme. Many other states are expressing interest in Shakthi scheme," he said.
PM Modi has reportedly spoken in an interview on bus and the Metro rail services and whether or not he made a specific reference to Karnataka is not known.
When asked if there was a shortage of buses in North Karnataka, Shivakumar said, "We have already taken a decision to buy 1,000 new buses. Of these, 100 buses have been allocated to Ramanagara district. Buses will be allocated to North Karnataka as well.
"We are not looking at making profits from KSRTC. We are only ensuring it doesn’t make losses. The government is reimbursing the cost of tickets under the Shakthi scheme," he said.
