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Limacina Helicina
''Limacina helicina'' is a species of small swimming planktonic sea snail in the family Limacinidae, which belong to the group commonly known as sea butterflies (Thecosomata). ''Limacina helicina'' is a keystone species of mesozooplankton in Arctic pelagic ecosystems. The first written record of this species was by Friderich Martens from Spitsbergen in 1675. ''Limacina helicina'' was also observed during a 1773 expedition to the Arctic led by Constantine John Phipps on the ships HMS ''Racehorse'' and on HMS ''Carcass'' and the species was described one year later, in 1774. ''Limacina helicina'' is the type species of the genus ''Limacina''. In contrast to the traditional view, it was shown in 2010 that the distribution of this species is not bipolar; Arctic and Antarctic individuals belong to two genetically distinct species: ''Limacina helicina'' in the Arctic, and ''Limacina antarctica'' in the Antarctic. Subspecies * ''Limacina helicina helicina'' (Phipps, 1774)Bouc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Animal
Animals are multicellular, eukaryotic organisms in the Kingdom (biology), biological kingdom Animalia. With few exceptions, animals Heterotroph, consume organic material, Cellular respiration#Aerobic respiration, breathe oxygen, are Motility, able to move, can Sexual reproduction, reproduce sexually, and go through an ontogenetic stage in which their body consists of a hollow sphere of Cell (biology), cells, the blastula, during Embryogenesis, embryonic development. Over 1.5 million Extant taxon, living animal species have been Species description, described—of which around 1 million are Insecta, insects—but it has been estimated there are over 7 million animal species in total. Animals range in length from to . They have Ecology, complex interactions with each other and their environments, forming intricate food webs. The scientific study of animals is known as zoology. Most living animal species are in Bilateria, a clade whose members have a Symmetry in biology#Bilate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sea Snail
Sea snail is a common name for slow-moving marine gastropod molluscs, usually with visible external shells, such as whelk or abalone. They share the taxonomic class Gastropoda with slugs, which are distinguished from snails primarily by the absence of a visible shell. Definition Determining whether some gastropods should be called sea snails is not always easy. Some species that live in brackish water (such as certain neritids) can be listed as either freshwater snails or marine snails, and some species that live at or just above the high tide level (for example species in the genus '' Truncatella'') are sometimes considered to be sea snails and sometimes listed as land snails. Anatomy Sea snails are a very large group of animals and a very diverse one. Most snails that live in salt water respire using a gill or gills; a few species, though, have a lung, are intertidal, and are active only at low tide when they can move around in the air. These air-breathing species includ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Type Species
In zoological nomenclature, a type species (''species typica'') is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the species that contains the biological type specimen(s). Article 67.1 A similar concept is used for suprageneric groups and called a type genus. In botanical nomenclature, these terms have no formal standing under the code of nomenclature, but are sometimes borrowed from zoological nomenclature. In botany, the type of a genus name is a specimen (or, rarely, an illustration) which is also the type of a species name. The species name that has that type can also be referred to as the type of the genus name. Names of genus and family ranks, the various subdivisions of those ranks, and some higher-rank names based on genus names, have such types. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species Description
A species description is a formal description of a newly discovered species, usually in the form of a scientific paper. Its purpose is to give a clear description of a new species of organism and explain how it differs from species that have been described previously or are related. In order for species to be validly described, they need to follow guidelines established over time. Zoological naming requires adherence to the ICZN code, plants, the ICN, viruses ICTV, and so on. The species description often contains photographs or other illustrations of type material along with a note on where they are deposited. The publication in which the species is described gives the new species a formal scientific name. Some 1.9 million species have been identified and described, out of some 8.7 million that may actually exist. Millions more have become extinct throughout the existence of life on Earth. Naming process A name of a new species becomes valid (available in zo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HMS Carcass (1759)
HMS ''Carcass'' was an of the Royal Navy, later refitted as a survey vessel. A young Horatio Nelson, 1st Viscount Nelson, Horatio Nelson served aboard her as a midshipman on an expedition to the Arctic in 1773. Design and construction The ''Infernal'' class were designed by Thomas Slade. ''Carcass'' was ordered from Stanton & Wells, Rotherhithe on 21 September 1758 and launched on 27 January 1759, having been named over a week previously on 19 January. ''Carcass'' was commissioned as a sloop-of-war, sloop at Deptford Dockyard on 27 June 1759, having cost £3,757.14.6d to build, and a further £2,144.8.1d spent on fitting out. Career ''Carcass''s first commander was Charles Inglis (c. 1731–1791), Charles Inglis, who took her to join George Brydges Rodney, 1st Baron Rodney, Admiral George Rodney's squadron in the English Channel. The vessel was present at the Raid on Le Havre, bombardment of Le Havre on 3 July 1759, and the following year captured the 10-gun ''Mercury'' off ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HMS Racehorse (1757)
HMS ''Racehorse'' was an 18-gun ship-rigged (i.e. three-masted) sloop of the Royal Navy. Originally the French ship ''Marquis de Vaudreuil,'' she was captured by the Royal Navy in 1757 and refitted as a survey vessel for the 1773 Phipps expedition towards the North Pole. Renamed ''HMS Thunder'' in 1775, she was captured back by the French in 1778. Early Royal Navy service, 1757 to 1763 ''Racehorse'' was originally the 18-gun French privateer ''Marquis de Vaudreuil'', captured from the French in 1757 during the Seven Years' War, and purchased for the British Navy on 28 April 1757. As she was a three-masted vessel, she was described as a "frigate", but as she mounted just 18 guns, she was actually registered as a sloop. In this role, she served her first commission (from June 1757 to 1758) under Commander Francis Burslem in home waters. She was reclassed and refitted as a fireship (re-armed with just eight 6-pounders), and then as a bomb vessel (with the addition of one 13-i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Constantine John Phipps
Constantine John Phipps, 2nd Baron Mulgrave (30 May 1744 – 10 October 1792) was an English explorer and officer in the Royal Navy. He served during the Seven Years' War and the American War of Independence, seeing action in a number of battles and engagements. Inheriting a title, he also went on to have a successful career in Parliament and occupied a number of political offices during his later years. Family and early life Phipps was born on 30 May 1744, the eldest son of Constantine Phipps, 1st Baron Mulgrave and his wife, Lepel Hervey, the eldest daughter of John 2nd Baron Hervey of Ickworth and Mary 'Molly' Lepel. Phipps attended Eton College, where he befriended Joseph Banks, the English naturalist, botanist, and later patron of the natural sciences. Seven Years' War In January 1759, he joined the 70-gun as a cadet under his uncle Captain Augustus Hervey during Hervey's 21-week watch on the French fleet in 1759. Phipps remained with his uncle on the latter's appoin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spitsbergen
Spitsbergen (; formerly known as West Spitsbergen; Norwegian: ''Vest Spitsbergen'' or ''Vestspitsbergen'' , also sometimes spelled Spitzbergen) is the largest and the only permanently populated island of the Svalbard archipelago in northern Norway. Constituting the westernmost bulk of the archipelago, it borders the Arctic Ocean, the Norwegian Sea, and the Greenland Sea. Spitsbergen covers an area of , making it the largest island in Norway and the 36th-largest in the world. The administrative centre is Longyearbyen. Other settlements, in addition to research outposts, are the Russian mining community of Barentsburg, the research community of Ny-Ålesund, and the mining outpost of Sveagruva. Spitsbergen was covered in of ice in 1999, which was approximately 58.5% of the island's total area. The island was first used as a whaling base in the 17th and 18th centuries, after which it was abandoned. Coal mining started at the end of the 19th century, and several permanent commun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Friderich Martens
Friderich Martens (1635 - 1699) , Tjärnö Marine Biological Laboratory, Göteborg University International League of Antiquarian Booksellers (ILAB) was a German physician and naturalist who conducted the first scientific observations of the nature, animal life and climate of Svalbard. Government of Norway, document archives He published his notes in the book "''Spitzbergische oder Groenlandische Reise-Beschreibung, gethan im Jahre 1671''" and this book became a reference work for many decades. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pelagic
The pelagic zone consists of the water column of the open ocean, and can be further divided into regions by depth (as illustrated on the right). The word ''pelagic'' is derived . The pelagic zone can be thought of as an imaginary cylinder or water column between the surface of the sea and the bottom. Conditions in the water column change with depth: pressure increases; temperature and light decrease; salinity, oxygen, micronutrients (such as iron, magnesium and calcium) all change. Marine life is affected by bathymetry (underwater topography) such as the seafloor, shoreline, or a submarine seamount, as well as by proximity to the boundary between the ocean and the atmosphere at the ocean surface, which brings light for photosynthesis, predation from above, and wind stirring up waves and setting currents in motion. The pelagic zone refers to the open, free waters away from the shore, where marine life can swim freely in any direction unhindered by topographical constraints. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arctic
The Arctic ( or ) is a polar regions of Earth, polar region located at the northernmost part of Earth. The Arctic consists of the Arctic Ocean, adjacent seas, and parts of Canada (Yukon, Northwest Territories, Nunavut), Danish Realm (Greenland), Finland, Iceland, Norway, Russia (Murmansk Oblast, Murmansk, Siberia, Nenets Autonomous Okrug, Nenets Okrug, Novaya Zemlya), Sweden and the United States (Alaska). Land within the Arctic region has seasonally varying snow and sea ice, ice cover, with predominantly treeless permafrost (permanently frozen underground ice) containing tundra. Arctic seas contain seasonal sea ice in many places. The Arctic region is a unique area among Earth's ecosystems. The cultures in the region and the Arctic indigenous peoples have adapted to its cold and extreme conditions. Life in the Arctic includes zooplankton and phytoplankton, fish and marine mammals, birds, land animals, plants and human societies. Arctic land is bordered by the subarctic. De ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mesozooplankton
Zooplankton are the animal component of the planktonic community ("zoo" comes from the Greek word for ''animal''). Plankton are aquatic organisms that are unable to swim effectively against currents, and consequently drift or are carried along by currents in the ocean, or by currents in seas, lakes or rivers. Zooplankton can be contrasted with phytoplankton, which are the plant component of the plankton community ("phyto" comes from the Greek word for ''plant''). Zooplankton are heterotrophic (other-feeding), whereas phytoplankton are autotrophic (self-feeding). This means zooplankton cannot manufacture their own food but must eat other plants or animals instead — in particular they eat phytoplankton. Zooplankton are generally larger than phytoplankton, most are microscopic scale, microscopic, but some (such as jellyfish) are macroscopic and can be seen with the naked eye. Many #Protozoans, protozoans (single-celled Marine protists, protists that prey on other microscopic life ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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