first_img Related Items:mosquito repellent flying off the shelves in TCI, shelves empty of mosquito repellent Facebook Twitter Google+LinkedInPinterestWhatsApp Facebook Twitter Google+LinkedInPinterestWhatsAppProvidenciales, TCI, July 27, 2016 – Store shelves where mosquito repellent once stood are looking empty as stock around the islands are running low as people try to arm themselves against mosquito bites.  On Saturday it was revealed that the TCI is among the 65 countries worldwide with recorded cases of the mosquito borne Zika Virus; among the 22 in the Caribbean.last_img read more

first_img New species of lizard found in stomach of Cretaceous microraptor Researchers have discovered that small mammals, such as those similar to this dormouse, tend to survive longer as a species, while larger mammals tend to die out and/or evolve faster. Image: H. Osadnik. Explore further But overall, small mammals’ ability to hibernate or enter a state of torpor seems to give them the largest benefit for prolonging their species duration. As the researchers found, 41 of 67 (61 percent) extinct small mammal genera had some kind of hibernation ability, while only 15 of 50 (30 percent) extinct large mammal genera did. And the small mammals that didn’t hibernate had relatively faster evolution rates, as they were forced to cope with the elements. The longest living genera in the study were a mole, two gliding squirrels, and two dormice, which lasted about 16 million years, and all had the ability to burrow or hibernate. The tapir was the only large mammal that evolved at a slow rate more akin to the smaller mammals. Most large mammals that didn’t hibernate evolved into a new species or went extinct in just a few million years. The shortest duration in the researchers’ data was one million years. However, Stenseth noted that the truly short-lived creatures are invisible in the fossil record. He also explained that short-lived and long-lived mammals both have their own advantages and disadvantages.“The most diverse and abundant groups, such as the mouse-like (muroid) rodents, have high origination and extinction rates,” he said. “But slow evolvers like dormice are successful in their own way, and clearly very good at what they are doing.”In light of the current climate crisis, this study may help scientists predict which kinds of species are more vulnerable to climatic fluctuations, the authors explain. “There has been a steady loss of large mammals in recent times, and this trend is likely to continue,” said Mikael Fortelius, geology professor at the University of Helsinki and a co-author of the paper. “We are currently extending our PNAS study to include living mammals and hope to be able to present our results soon.”More information: Liow, Lee Hsiang;, Fortelius, Mikael; Bingham, Ella; Lintulaakso, Kari; Mannila, Heikki; Flynn, Larry; and Stenseth, Nils Chr. “Higher origination and extinction rates in larger mammals.” Proceedings of the National Academy of Sciences. April 22, 2008, vol. 105, no. 16, 6097-6102.Copyright 2008 PhysOrg.com. All rights reserved. This material may not be published, broadcast, rewritten or redistributed in whole or part without the express written permission of PhysOrg.com. Recently, a team of researchers from Finland, Norway and the US has found that larger mammals seem to evolve more quickly than smaller ones – but the reason isn’t body size, per se. Rather, the scientists found that some smaller mammals have the ability to hibernate, burrow or hide in other shelters. In doing so, they effectively sleep through harsh environmental changes. Larger mammals, on the other hand, must endure the hard times when there’s little food or extreme weather. Their large size constrains them from digging burrows or lowering their metabolic rates for extended time periods. In a sense, larger mammals face the elements head-on like a fearless adventurer who might not make it through alive, and is forever changed by the experience.The finding – which is based on analysis of a large Neogene Old World fossil dataset – is somewhat surprising. On an individual level, large mammals tend to live significantly longer than smaller ones. For example, elephants can live up to 70 years, while shrews are lucky to reach two. Because of their faster generation times, small mammals should evolve faster, and small mammal species and genera should appear and go extinct faster – but this is not the case. “We believe the greatest significance of our work is showing that, contrary to expectation, small mammals do not evolve faster than large mammals, and that some of them actually evolve much slower,” Nils Stenseth, zoology professor at the University of Oslo, told PhysOrg.com. “The greatest potential significance is in the SLOH [sleep-or-hide] hypothesis – specifically in its implication that removing part of the environmental pressure slows down evolution quite dramatically.”Previous studies – some focusing on tropical mammals – have had mixed results on size-based evolution rates for fossil mammals, with some finding the opposite pattern and some finding no difference. One possible explanation is that large mammals in tropical climates don’t face such harsh environmental conditions, and so they may last longer and evolve more slowly. Further, smaller mammals in tropical areas may suffer from the increased competition, leading to more rapid turnover rates for them.center_img Citation: Large mammal species live harder, die out faster (2008, May 7) retrieved 18 August 2019 from https://phys.org/news/2008-05-large-mammal-species-harder-die.html Throughout Earth’s history, species have come and gone, being replaced by new ones that are better able to cope with life’s challenges. But some species last longer than others, while others may die out sooner or evolve more quickly. 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.last_img read more

first_imgHoly cow!!! Delhi this weekend made this expression towards a philanthropic cause (which was saving our Indian desi cow). How? By organising an exhibition plus fest centered on a conscious awakening towards going back to nature and preserving nature for our own happy and healthy future.Organised at Select City Walk, Saket, the Ahimsa Bazar or Holy Cow Music Fest, was organised by Holy Cow Foundation.  It had stalls opened from 11 am till 10 pm aimed at promoting products made from cowdung (manure, dhoopbati, agnihotra samidha, air purifier kit etc) and urine (ark, pesticide, phenyel etc.); the foundation is working towards enabling sustainability of the cow and creating awareness about apathetic condition of our domestic animals. Also Read – ‘Playing Jojo was emotionally exhausting’Visitors could select from a sumptuous menu consisting of vegetarian and vegan food and vegan ice-cream. Also, there was choice of organic vegetables and products as well as ayurveda and Holy Cow panchgavya health products. For the nature conscious, there were stalls on home composting units and organic compost and for those with literary interest, there were books on display by Indological book store. The festival also had some entertainment value to it with scintillating performances by the snake charmers sans the live snakes and kajri sangeet. For the classically attuned, there were breathtaking jugalbandi on table and the lion dance of the north east. Also Read – Leslie doing new comedy special with NetflixThe music extravaganza continued till late in the evening with rock Kirtan by Vraj Vadhu group of ISKON, including street plays and several other performances.Covered with glee and fun, the event had an underlying message which highlighted the following points- Stop cow slaughter. Stop any kind of animal slaughter for food and pleasure and respect all forms of life and live with nature. Encourage farmers to produce organic products by creating a demand for them and use cow milk, curd and ghee in your homes since these are ambrosia for humans amongst others The major concern marked was indiscriminate slaughter of cows to export meat (in our country everyday 50,000 cows are being slaughtered) and excessive use of chemical fertilizers in agriculture (today Punjab is known as the cancer  capital of India) have become the major cause of growing instance of women becoming barren and men becoming impotent, rising graphs of diseases, mental stress and disorders, disorientation of youth and growing aggression in our society.This is the second time the festival is being held and the response was quite heartening.last_img read more

first_imgKolkata: Chief Minister Mamata Banerjee handed over CESC Shrishti Samman to noted writer Manishankar Mukherjee, popularly known as Shankar, at the inaugural session of the International Kolkata Book Fair organised by the Booksellers’ and Publishers’ Guild on Thursday afternoon.Born in December 1933 at Bongaon, Shankar was the neighbour of Bibhutibhusan Bandopadhyay, author of Pather Panchali. His father Haripada Mukherji moved to Howrah shortly before the second World War, which is where the formative years of the well-known author began. Also Read – Speeding Jaguar crashes into Mercedes car in Kolkata, 2 pedestrians killedFollowing the untimely death of his father in 1947, began the writer’s difficult journey as a street-vendor and then a typewriter cleaner. He was a temporary teacher at Vivekananda Institution and later found a job in a jute broker’s office. In 1951, Shankar met Noel Frederick Barwell, the last British member of the Bar-of-England practising in India. He became his last clerk. In 1954, following the death of Barwell, the author started writing his first book, which was serialised as Kata Ajanare. There has been no looking back for him since and he continues to command an enviable readership in India and abroad. The range of Shankar’s writing is astonishing, from fiction, short story, memoirs and travelogues to his enormously popular books on Vivekananda. One of his biggest best-sellers Chowringhee has been translated in many languages across the world, including English, French, Russian, Italian, Spanish and Chinese. Shankar also enjoys a vast readership in India and Bangladesh across many languages.last_img read more

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