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Chris Perrins
Christopher Miles Perrins, (born 11 May 1935) is Emeritus Fellow of the Edward Grey Institute of Field Ornithology at the University of Oxford, Emeritus Fellow at Wolfson College, Oxford and His Majesty's Warden of the Swans since 1993. Education Perrins was educated at Charterhouse School and Queen Mary College where he was awarded a Bachelor of Science degree in Zoology in 1957. He completed his postgraduate study and research at the University of Oxford where he was awarded a Doctor of Philosophy degree in 1963 for research on brood size in tits supervised by David Lack. Research and career Perrins research interests are in the population dynamics and breeding biology of birds, particularly tits (''Paridae''), mute swans and seabirds on Skomer and Skokholm. He investigated animal lead poisoning of swans from lead shot. He is renowned for his work on avian population ecology and, in particular, reproductive rates. He has made a number of important contributions to the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charterhouse School
Charterhouse is a Public school (United Kingdom), public school (English independent boarding school for pupils aged 13–18) in Godalming, Surrey, England. Founded by Thomas Sutton in 1611 on the site of the old Carthusian monastery in Charterhouse Square, Smithfield, London, Smithfield, London, it educates over 1000 pupils, aged 13 to 18 years. Charterhouse is one of the original nine English Public school (United Kingdom), public schools reported upon by the Clarendon Commission in 1864 leading to its regulation by the Public Schools Act 1868. Charterhouse charges full boarders up to £47,535 per annum (2023/2024). It educated the British Prime Minister of the United Kingdom, Prime Minister Lord Liverpool and has List of Old Carthusians, multiple notable alumni. History In May 1611, the London Charterhouse came into the hands of Thomas Sutton (1532–1611) of Knaith, Lincolnshire. He acquired a fortune by the discovery of coal on two estates which he had leased near Newc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Warden Of The Swans
The Warden of the Swans is an office in the Royal Household of the Sovereign of the United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Northwestern Europe, off the coast of European mainland, the continental mainland. It comprises England, Scotlan ..., created in 1993 when the ancient post of Keeper of the Kings Swans (which dated from the 13th century) was divided into two new posts. The second is the Marker of the Swans. The first office-holder, and so far the only Warden of the Swans, is Professor Christopher Perrins, LVO, appointed 1993. See also * Swan Upping References External links Wardens get down to the task of swan-upping Positions within the British Royal Household Ceremonial officers in the United Kingdom Culture associated with the River Thames Swans {{royalty-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lead Shot
Shot is a collective term for small spheres or pellets, often made of lead. These have been projected from slings since ancient times and were the original projectiles for shotguns and are still fired primarily from shotguns and grenade launchers, while they are less commonly used in riot guns. Shot shells are also available in many handgun calibers in a configuration known as " birdshot", " rat shot", or " snake shot". Lead shot is also used for a variety of other purposes such as filling cavities with dense material for weight and/or balance. Some versions may be plated with other metals. Lead shot was originally made by pouring molten lead through screens into water, forming what was known as "swan shot", and, later, more economically mass-produced at higher quality using a shot tower. The ''Bliemeister method'' has supplanted the shot tower method since the early 1960s. Manufacture Producing lead shot from a shot tower was pioneered in the late 18th century by Will ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Animal Lead Poisoning
Animal lead poisoning (also known as avian plumbism, or avian saturnism for birds) is a veterinary condition and pathology caused by increased levels of the heavy metal lead in an animal's body. Lead interferes with a variety of body and natural processes. It is toxic to many organs and tissues including the heart, bones, intestines, kidneys, and reproductive and nervous systems. It mainly affects the haematopoietic system. It also affects the sulfhydryl group containing enzymes and also thiol content of erythrocyte. Furthermore, it inhibits the enzyme delta amino levaminic acid dehydrogenase enzyme (ALA) which is present in the red blood cell. It is therefore particularly toxic to young animals, mainly dogs and cattle. As in humans, ''animal lead poisoning'' may be acute (from intense exposure of short duration) or chronic (from repeat low-level exposure over a prolonged period). Acute intoxication can quickly lead to death. Prevalence Lead is now a common environmental pollut ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Skokholm
Skokholm () or Skokholm Island is an island off the coast of Pembrokeshire, Wales, south of the neighbouring island of Skomer. The surrounding waters are a marine reserve and all are part of the Pembrokeshire Coast National Park. Both islands are listed as Sites of Special Scientific Interest. Geography Skokholm is long and wide, covering . Made up of Old Red Sandstone, its cliffs stand between in the northeast, to in the southwest. Battered by storms, the high cliffs and isolated nature of the island make it a haven for seabirds. There is a rock outcrop close to the centre of the island, which provides shelter to the island's only structures. Its greatest height is 55 metres (180 feet). History Whilst no trees grow on the island in modern times, Skokholm is possibly Norse for "wooded island", a combination of ''skógr'' (wood, modern Norwegian: ''skog'') and ''holmr'' (small island, middle English ''holm'' and modern Scandinavian ''holme''), named by the Vikings. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Skomer
Skomer () or Skomer Island is an island off the coast of Pembrokeshire, in the community of Marloes and St Brides in west Wales. It is well known for its wildlife: around half the world's population of Manx shearwaters nest on the island, the Atlantic puffin colony is the largest in southern Britain, and the Skomer vole (a subspecies of the bank vole) is unique to the island. Skomer is a national nature reserve (United Kingdom), national nature reserve, a Site of Special Scientific Interest and a Special Protection Area. It is surrounded by a marine nature reserve and is managed by the Wildlife Trust of South and West Wales. Skomer is known for its archaeological interest: stone circles, standing stone and remains of prehistoric houses. Much of the island has been designated an ancient monument. Description The island has an area of . Its highest point is above sea level at Gorse Hill, while the majority of the island sits at around above sea level. Skomer is intersected by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Seabird
Seabirds (also known as marine birds) are birds that are adaptation, adapted to life within the marine ecosystem, marine environment. While seabirds vary greatly in lifestyle, behaviour and physiology, they often exhibit striking convergent evolution, as the same environmental problems and feeding ecological niche, niches have resulted in similar adaptations. The first seabirds evolved in the Cretaceous geological period, period, while modern seabird families emerged in the Paleogene. Seabirds generally live longer, Reproduction, breed later and have fewer young than other birds, but they invest a great deal of time in their young. Most species nest in Bird colony, colonies, varying in size from a few dozen birds to millions. Many species are famous for undertaking long annual bird migration, migrations, crossing the equator or circumnavigating the Earth in some cases. They feed both at the ocean's surface and below it, and even on each other. Seabirds can be highly pelagic, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Proceedings Of The National Academy Of Sciences
''Proceedings of the National Academy of Sciences of the United States of America'' (often abbreviated ''PNAS'' or ''PNAS USA'') is a peer-reviewed multidisciplinary scientific journal. It is the official journal of the National Academy of Sciences, published since 1915, and publishes original research, scientific reviews, commentaries, and letters. According to ''Journal Citation Reports'', the journal has a 2022 impact factor of 9.4. ''PNAS'' is the second most cited scientific journal, with more than 1.9 million cumulative citations from 2008 to 2018. In the past, ''PNAS'' has been described variously as "prestigious", "sedate", "renowned" and "high impact". ''PNAS'' is a delayed open-access journal, with an embargo period of six months that can be bypassed for an author fee ( hybrid open access). Since September 2017, open access articles are published under a Creative Commons license. Since January 2019, ''PNAS'' has been online-only, although print issues are available ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mute Swan
The mute swan (''Cygnus olor'') is a species of swan and a member of the waterfowl family Anatidae. It is native to much of Eurasia, and (as a rare winter visitor) the far north of Africa. It is an introduced species in North America, home to the largest populations outside of its native range, with additional smaller introductions in Australasia and southern Africa. The name "mute" derives from it being less vocal than other swan species. Measuring in length, this large swan is wholly white in plumage with an orange beak bordered with black. It is recognisable by its pronounced knob atop the beak, which is larger in males. Taxonomy The mute swan was first formally named by the German naturalist Johann Friedrich Gmelin as ''Anas olor'' in 1789 and was transferred by Johann Matthäus Bechstein to the new genus ''Cygnus'' in 1803. Both ''cygnus'' and ''olor'' mean "swan" in Latin; ''cygnus'' is a variant form of ''cycnus'', borrowing from Greek language, Greek ''kyknos'', a wor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Science (journal)
''Science'' is the peer review, peer-reviewed academic journal of the American Association for the Advancement of Science (AAAS) and one of the world's top academic journals. It was first published in 1880, is currently circulated weekly and has a subscriber base of around 130,000. Because institutional subscriptions and online access serve a larger audience, its estimated readership is over 400,000 people. ''Science'' is based in Washington, D.C., United States, with a second office in Cambridge, UK. Contents The major focus of the journal is publishing important original scientific research and research reviews, but ''Science'' also publishes science-related news, opinions on science policy and other matters of interest to scientists and others who are concerned with the wide implications of science and technology. Unlike most scientific journals, which focus on a specific field, ''Science'' and its rival ''Nature (journal), Nature'' cover the full range of List of academ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Population Dynamics
Population dynamics is the type of mathematics used to model and study the size and age composition of populations as dynamical systems. Population dynamics is a branch of mathematical biology, and uses mathematical techniques such as differential equations to model behaviour. Population dynamics is also closely related to other mathematical biology fields such as epidemiology, and also uses techniques from evolutionary game theory in its modelling. History Population dynamics has traditionally been the dominant branch of mathematical biology, which has a history of more than 220 years,Malthus, Thomas Robert. An Essay on the Principle of Population: Library of Economics although over the last century the scope of mathematical biology has greatly expanded. The beginning of population dynamics is widely regarded as the work of Malthus, formulated as the Malthusian growth model. According to Malthus, assuming that the conditions (the environment) remain constant ('' ceteris pari ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
