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Bottlenose Dolphin
The bottlenose dolphin is a toothed whale in the genus ''Tursiops''. They are common, cosmopolitan members of the family Delphinidae, the family of oceanic dolphins. Molecular studies show the genus contains three species: the common bottlenose dolphin (''Tursiops truncatus''), the Indo-Pacific bottlenose dolphin (''Tursiops aduncus''), and Tamanend's bottlenose dolphin (''Tursiops erebennus''). Others, like the Burrunan dolphin (''Tursiops (aduncus) australis''), may be alternately considered their own species or be subspecies of ''T. aduncus''. Bottlenose dolphins inhabit warm and temperate seas worldwide, being found everywhere except for the Arctic and Antarctic Circle regions. Their name derives from the Latin ''tursio'' (dolphin) and ''truncatus'' for the truncated teeth (the type specimen was old and had worn down teeth; this is not a typical characteristic of most members of the species). Numerous investigations of bottlenose dolphin intelligence have bee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Miocene
The Miocene ( ) is the first epoch (geology), geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words (', "less") and (', "new") and means "less recent" because it has 18% fewer modern marine invertebrates than the Pliocene has. The Miocene followed the Oligocene and preceded the Pliocene. As Earth went from the Oligocene through the Miocene and into the Pliocene, the climate slowly cooled towards a series of ice ages. The Miocene boundaries are not marked by distinct global events but by regionally defined transitions from the warmer Oligocene to the cooler Pliocene Epoch. During the Early Miocene, Afro-Arabia collided with Eurasia, severing the connection between the Mediterranean and Indian Oceans, and allowing the interchange of fauna between Eurasia and Africa, including the dispersal of proboscideans and Ape, hominoids into Eurasia. During the late Miocene, the conn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Delphinidae
Oceanic dolphins or Delphinidae are a widely distributed family of dolphins that live in the sea. Close to forty extant species are recognised. They include several big species whose common names contain "whale" rather than "dolphin", such as the Globicephalinae (round-headed whales, which include the false killer whale and pilot whale). Delphinidae is a family within the superfamily Delphinoidea, which also includes the porpoises (Phocoenidae) and the Monodontidae ( beluga whale and narwhal). River dolphins are relatives of the Delphinoidea. Oceanic dolphins range in size from the and Maui's dolphin to the and orca, the largest known dolphin. Several species exhibit sexual dimorphism; the males are larger than females. They have streamlined muscular bodies and two limbs that are modified into flippers. Though not quite as flexible as seals, some dolphins can travel at speeds 29 km/h (18 mph) for short distances. Most delphinids primarily eat fish, along with ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Artificial Language
Artificial languages are languages of a typically very limited size which emerge either in computer simulations between artificial agents, robot interactions or controlled psychological experiments with humans. They are different from both constructed languages and formal languages in that they have been consciously devised by an individual or group but are the result of (distributed) conventionalisation processes, much like natural languages. Opposed to the idea of a central ''designer'', the field of artificial language evolution in which artificial languages are studied can be regarded as a sub-part of the more general cultural evolution studies. Origin The idea of creation of artificial language arose in 17th and 18th century as a result of gradually decreasing international role of Latin. The initial schemes were mainly aimed at the development of a rational language free from inconsistence of living language and based on classification of concepts. The material of living la ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mimicry
In evolutionary biology, mimicry is an evolved resemblance between an organism and another object, often an organism of another species. Mimicry may evolve between different species, or between individuals of the same species. In the simplest case, as in Batesian mimicry, a mimic resembles a model, so as to deceive a dupe, all three being of different species. A Batesian mimic, such as a hoverfly, is harmless, while its model, such as a wasp, is harmful, and is avoided by the dupe, such as an insect-eating bird. Birds hunt by sight, so the mimicry in that case is visual, but in other cases mimicry may make use of any of the senses. Most types of mimicry, including Batesian, are deceptive, as the mimics are not harmful, but Müllerian mimicry, where different harmful species resemble each other, is Honest signal, honest, as when species of wasps and of bees all have genuinely Aposematism, aposematic warning coloration. More complex types may be bipolar, involving only two speci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antarctic Circle
The Antarctic Circle is the most southerly of the five major circles of latitude that mark maps of Earth. The region south of this circle is known as the Antarctic, and the zone immediately to the north is called the Southern Temperate Zone. South of the Antarctic Circle, the Sun is above the horizon for 24 continuous hours at least once per year (and therefore visible at solar midnight) and the centre of the Sun (ignoring refraction) is below the horizon for 24 continuous hours at least once per year (and therefore not visible at solar noon); this is also true within the Arctic Circle, the Antarctic Circle’s counterpart in the Northern Hemisphere. The position of the Antarctic Circle is not fixed and, not taking account of the nutation, currently runs south of the Equator. This figure may be slightly inaccurate because it does not allow for the effects of astronomical nutation, which can be up to 10″. Its latitude depends on the Earth's axial tilt, which fluctuates within ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arctic Circle
The Arctic Circle is one of the two polar circles, and the northernmost of the five major circle of latitude, circles of latitude as shown on maps of Earth at about 66° 34' N. Its southern counterpart is the Antarctic Circle. The Arctic Circle marks the southernmost latitude at which, on the winter solstice in the Northern Hemisphere, the Sun does not rise all day, and on the Northern Hemisphere's summer solstice, the Sun does not set. These phenomena are referred to as polar night and midnight sun respectively, and the further north one progresses, the more obvious this becomes. For example, in the Russian port city of Murmansk, three degrees north of the Arctic Circle, the Sun stays below the horizon for 20 days before and after the winter solstice, and above the horizon for 20 days before and after the summer solstice. The position of the Arctic Circle is not fixed and currently runs north of the Equator. Its latitude depends on Earth's axial tilt, which axial precession, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Temperateness
In geography, the temperate climates of Earth occur in the middle latitudes (approximately 23.5° to 66.5° N/S of the Equator), which span between the tropics and the polar regions of Earth. These zones generally have wider temperature ranges throughout the year and more distinct seasonal changes compared to tropical climates, where such variations are often small; they usually differ only in the amount of precipitation. In temperate climates, not only do latitudinal positions influence temperature changes, but various sea currents, prevailing wind direction, continentality (how large a landmass is) and altitude also shape temperate climates. The Köppen climate classification defines a climate as "temperate" C, when the mean temperature is above but below in the coldest month to account for the persistence of frost. However, some adaptations of Köppen set the minimum at . Continental climates are classified as D and considered to be varieties of temperate climates, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Burrunan Dolphin
The Burrunan dolphin (''Tursiops australis'') is a proposed species of bottlenose dolphin found in parts of Victoria, Australia first described in 2011. Its exact taxonomy is debated: numerous studies support it as being a separate species within the genus ''Tursiops'' and occupying a basal position within the genus, with limited phylogenetic studies using different methodologies indicate that it is a subspecies of the Indo-Pacific bottlenose dolphin (''Tursiops aduncus''). The Burrunan dolphin is not currently recognized as a species by the Society for Marine Mammalogy or American Society of Mammalogists, which cites problematic methodology in the original study proposing species status and recommends further research. There are only two known resident populations in Victoria, Australia, with an estimated total population size of less than 180 individuals, and the predicted effective populations sizes small; Port Phillip Bay: 81.5, Gippsland Lakes and Tasmania: 65.5. Prior to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Society For Marine Mammalogy
The Society for Marine Mammalogy was founded in 1981 and is the largest international association of marine mammal scientists in the world. Mission The mission of the Society for Marine Mammalogy (SMM) is to promote the global advancement of marine mammal science and contribute to its relevance and impact in education, conservation and management. Objectives * Evaluate and promote the educational, scientific and managerial advancement of marine mammal science. * Gather and disseminate to members of the Society, the public, and public and private institutions, scientific, technical and management information through publications and meetings. * Provide scientific information, as required, on matters related to the conservation and management of marine mammal resources. History The Biennial Conferences on the Biology of Marine Mammals predate the founding of the Society. The Biennial Conferences were a successor to Tom Poulter's "Annual Conference on Biological Sonar and Diving M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tamanend's Bottlenose Dolphin
Tamanend's bottlenose dolphin (''Tursiops erebennus'') is a species of bottlenose dolphin that inhabits coastal waters in the eastern United States. This species was previously considered a nearshore variant of the common bottlenose dolphin '' Tursiops truncatus''. Taxonomy ''Tursiops erebennus'' was first described by Edward Drinker Cope as ''Delphinus erebennus'' in 1865. The type specimen was collected from a fisherman's seine net at the Red Bank community in West Deptford Township, New Jersey. Cope identified various physical differences between ''T. erebennus'' and ''T. truncatus'' (then known as ''Delphinus tursio''), including a smaller size, fewer vertebrae, and fewer ribs in ''T. erebennus''. However, ''T. erebennus'' was subsequently synonymized with ''T. truncatus''. Future studies and stock assessments instead recognized dolphins in the region as belonging to two ''T. truncatus'' ecotypes: a nearshore coastal type and an offshore type. Genetic analyses suggested that ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indo-Pacific Bottlenose Dolphin
The Indo-Pacific bottlenose dolphin (''Tursiops aduncus'') is a species of bottlenose dolphin. This dolphin grows to long, and weighs up to . It lives in the waters around India, northern Australia, South China, the Red Sea, and the eastern coast of Africa. Its back is dark grey and its belly is lighter grey or nearly white with grey spots. The Indo-Pacific bottlenose dolphin is generally smaller than the common bottlenose dolphin, has a proportionately longer rostrum (anatomy), rostrum, and has spots on its belly and lower sides. It also has more teeth than the common bottlenose dolphin — 23 to 29 teeth on each side of each jaw compared to 21 to 24 for the common bottlenose dolphin. Much of the old scientific data in the field combine data about the Indo-Pacific bottlenose dolphin and the common bottlenose dolphin into a single group, making it effectively useless in determining the structural differences between the two species. The IUCN lists the Indo-Pacific bottl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Common Bottlenose Dolphin
The common bottlenose dolphin or Atlantic bottlenose dolphin (''Tursiops truncatus'') is one of three species of bottlenose dolphin in the genus ''Tursiops''. The common bottlenose dolphin is a very familiar dolphin due to the wide exposure it receives in human care in marine parks and dolphinariums, and in movies and television programs.Leatherwood, S., & Reeves, R. (1990). ''The Bottlenose Dolphin''. San Diego: Academic Press, Inc., Common bottlenose dolphins inhabit temperate and tropical oceans throughout the world, absent only from polar waters.Jenkins, J. (2009''Tursiops truncatus'' Animal Diversity Web.Klinowska, M. (1991). ''Dolphins, Porpoises and Whales of the World: The IUCN Red Data Book''. Gland, Switzerland, U.K.: IUCN, While formerly known simply as the bottlenose dolphin, this term is now applied to the genus ''Tursiops'' as a whole. As considerable genetic variation has been described within this species, even between neighboring populations, many experts think ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
