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Brandt's Hamster
The Turkish hamster (''Mesocricetus brandti''), also referred to as Brandt's hamster, Azerbaijani hamster, or ''avurtlak'', is a species of hamster native to Turkey, Armenia and other surrounding nations. The Turkish hamster, first catalogued in 1878, is a fairly close relative of the Syrian or golden hamster, though far less is known about it, and it is rarely kept as a pet. The population of the Turkish hamster is said to be declining in the wild, yet this hamster is often used in laboratory testing. Turkish hamsters have lifespans of about two years and are solitary, nocturnal animals, which practice hibernation. They are reported to be more aggressive than other members of the family Cricetidae. They are tan and dark, sandy brown in color. Like all hamsters, the Turkish hamster has cheek pouches that allow it to carry large amounts of food at one time. Habitat and behavior Hamsters are found in the wild throughout Europe and Asia and are considered to be extremely adap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alfred Nehring
Alfred Nehring (29 January 1845, in Gandersheim – 29 September 1904 in Berlin-Charlottenburg) was a German zoologist and paleontologist. He studied philology and natural sciences in Göttingen and Halle, afterwards teaching classes in Wesel (1867) and Wolfenbüttel (1871). From 1881 he was a professor at the ''Landwirtschaftliche Hochschule'' (agricultural university) in Berlin. Nehring's scientific investigations involved modern and prehistoric vertebrates, being particularly interested in the history and morphology of domesticated animals (horses, dogs, etc.). In his studies of the guinea pig, he asserted '' Cavia cutleri'' to be the direct ancestor of the domesticated guinea pig. Selected writings * ''Ueber die Cerviden von Piracicaba in Brasilien (Prov. St. Paulo)'', 1884 - On cervids of Piracicaba. * ''Ueber eine Pelzrobben-Art von der Küste Süd-brasiliens'', 1887 - About a fur seal species from coastal southern Brazil. * ''Ueber Sus celebensis und verwandte'', 1889 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aggression
Aggression is overt or covert, often harmful, social interaction with the intention of inflicting damage or other harm upon another individual; although it can be channeled into creative and practical outlets for some. It may occur either reactively or without provocation. In humans, aggression can be caused by various triggers, from frustration due to blocked goals to feeling disrespected. Human aggression can be classified into direct and indirect aggression; whilst the former is characterized by physical or verbal behavior intended to cause harm to someone, the latter is characterized by behavior intended to harm the social relations of an individual or group. In definitions commonly used in the social sciences and behavioral sciences, aggression is an action or response by an individual that delivers something unpleasant to another person. Some definitions include that the individual must intend to harm another person. In an interdisciplinary perspective, aggression is rega ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mammals Of Azerbaijan
This list shows the IUCN Red List status of mammal species occurring in Azerbaijan. One species is endangered, five are vulnerable, and 11 are near threatened. The following tags are used to highlight each species' global conservation status as assessed on the respective IUCN Red List published by the International Union for Conservation of Nature: Order: Artiodactyla * Family: Bovidae ** Genus: ''Bison'' ***European bison, ''B. bonasus'' reintroduced **** Caucasian wisent, ''B. b. caucasicus'' ** Genus: '' Capra'' ***Wild goat, ''C. aegagrus'' *** East Caucasian tur, ''C. cylindricornis'' ** Genus: ''Gazella'' *** Goitered gazelle, ''G. subgutturosa'' ** Genus: '' Ovis'' ***Mouflon, ''O. gmelini'' **** Armenian mouflon, ''O. g. gmelini'' ** Genus: ''Rupicapra'' ***Chamois, ''R. rupicapra'' * Family: Cervidae ** Genus: ''Capreolus'' ***Roe deer, ''C. capreolus'' ** Genus: ''Cervus'' ***Red deer, ''C. elaphus'' ***Sika deer, ''C. nippon'' introduced * Family: Cervidae ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fauna Of Turkey
The fauna of Turkey is abundant and very varied. The wildlife of Turkey includes a great diversity of plants and animals, each suited to its own particular habitat, as it is a large country with many geographic and climatic regions About 1500 species of vertebrates have been recorded in the country and around 19,000 species of invertebrate. The country acts as a crossroads with links to Europe, Asia, and the Near East, and many birds use the country as a staging post during migration. Overview Turkey has a large range of habitat types and the diversity of its fauna is very great. There are nearly 1,500 species of vertebrate recorded of which over 100 species, mostly fish, are endemic. The country is on two major routes used by migratory birds which swells the numbers in spring and autumn. The invertebrates are also very diverse, with about 19,000 species being recorded including 4,000 endemics. Invertebrates Molluscs Insects There are over 250 species of ant in Turkey, 48 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mammals Of Western Asia
Mammals () are a group of vertebrate animals constituting the class Mammalia (), characterized by the presence of mammary glands which in females produce milk for feeding (nursing) their young, a neocortex (a region of the brain), fur or hair, and three middle ear bones. These characteristics distinguish them from reptiles (including birds) from which they diverged in the Carboniferous, over 300 million years ago. Around 6,400 extant species of mammals have been described divided into 29 orders. The largest orders, in terms of number of species, are the rodents, bats, and Eulipotyphla (hedgehogs, moles, shrews, and others). The next three are the Primates (including humans, apes, monkeys, and others), the Artiodactyla ( cetaceans and even-toed ungulates), and the Carnivora (cats, dogs, seals, and others). In terms of cladistics, which reflects evolutionary history, mammals are the only living members of the Synapsida (synapsids); this clade, together wi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mesocricetus
''Mesocricetus'' is a genus of Old World hamsters, including the Syrian or golden hamster, the first hamster to be introduced as a domestic pet, and still the most popular species of hamster for that purpose. Recent research has shown that, unlike almost all other land mammals studied, all species of this genus lack the capacity for color vision. Species *''Mesocricetus auratus'': Golden hamster or Syrian hamster *''Mesocricetus brandti'': Turkish hamster The Turkish hamster (''Mesocricetus brandti''), also referred to as Brandt's hamster, Azerbaijani hamster, or ''avurtlak'', is a species of hamster native to Turkey, Armenia and other surrounding nations. The Turkish hamster, first catalogued in ... or Brandt's hamster *''Mesocricetus newtoni'': Romanian hamster or Dobrudja hamster *''Mesocricetus raddei'': Ciscaucasian hamster Notes References *http://www.funet.fi/pub/sci/bio/life/mammalia/rodentia/cricetidae/mesocricetus/ * Rodent genera Taxa named by Alfred ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Experiment
An experiment is a procedure carried out to support or refute a hypothesis, or determine the efficacy or likelihood of something previously untried. Experiments provide insight into Causality, cause-and-effect by demonstrating what outcome occurs when a particular factor is manipulated. Experiments vary greatly in goal and scale but always rely on repeatable procedure and logical analysis of the results. There also exist natural experiment, natural experimental studies. A child may carry out basic experiments to understand how things fall to the ground, while teams of scientists may take years of systematic investigation to advance their understanding of a phenomenon. Experiments and other types of hands-on activities are very important to student learning in the science classroom. Experiments can raise test scores and help a student become more engaged and interested in the material they are learning, especially when used over time. Experiments can vary from personal and in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Laboratory
A laboratory (; ; colloquially lab) is a facility that provides controlled conditions in which scientific or technological research, experiments, and measurement may be performed. Laboratory services are provided in a variety of settings: physicians' offices, clinics, hospitals, and regional and national referral centers. Overview The organisation and contents of laboratories are determined by the differing requirements of the specialists working within. A physics laboratory might contain a particle accelerator or vacuum chamber, while a metallurgy laboratory could have apparatus for casting or refining metals or for testing their strength. A chemist or biologist might use a wet laboratory, while a psychologist's laboratory might be a room with one-way mirrors and hidden cameras in which to observe behavior. In some laboratories, such as those commonly used by computer scientists, computers (sometimes supercomputers) are used for either simulations or the analysis of data. Scient ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chinese Hamster
The Chinese hamster (''Cricetulus griseus'' or ''Cricetulus barabensis griseus'') is a rodent in the genus '' Cricetulus'' of the subfamily Cricetidae that originated in the deserts of northern China and Mongolia. They are distinguished by an uncommonly long tail in comparison to other hamsters, most of whose tails are stubby. Chinese hamsters are primarily nocturnal, however they will stay awake for brief periods, in between naps, throughout the day. Description Chinese hamsters grow to between 82 and 127 mm in body length (tail length 20–33 mm) and weigh 1.7 grams at birth, then as they get older can weigh 30–45 grams. Males have a fairly large scrotum relative to their body size. Their body proportions, compared to other hamster species – most of which tend to be compact – appear "long and thin" and they have (for a hamster) a relatively long tail. They live two to three years on average. The wild colour is brown with a black stripe down the spine, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roborovski Hamster
The Roborovski hamster (''Phodopus roborovskii''), also known as the desert hamster, Robo dwarf hamster, or simply dwarf hamster, is the smallest of three species of hamster in the genus ''Phodopus''. It lives in the deserts of Central Asia, averaging under at birth and and during adulthood. Distinguishing characteristics of the Roborovskis are eyebrow-like white spots and the lack of any dorsal stripe (found on the other members of the genus ''Phodopus''). The average lifespan for the Roborovski hamster is 2–3 years, though this is dependent on living conditions (extremes being four years in captivity and two in the wild). Roborovskis are known for their speed and have been said to run up to 6 miles a night. Distribution and habitat Roborovski hamsters are found in desert regions, such as the basin of the lake Zaysan in Kazakhstan and regions of Tuva, Mongolia and Xinjiang in China. The hamsters inhabit areas of loose sand and sparse vegetation and are rarely found in areas o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Djungarian Hamster
The winter white dwarf hamster (''Phodopus sungorus''), also known as the Russian dwarf hamster, Djungarian hamster, striped dwarf hamster, Siberian hamster, or Siberian dwarf hamster, is one of three species of hamster in the genus ''Phodopus''. It is ball-shaped and typically half the size of the Syrian hamster, so is called a dwarf hamster along with all ''Phodopus'' species. Features of the winter white hamster include a typically thick, dark grey dorsal stripe and furry feet. As winter approaches and the days shorten, the winter white dwarf hamster's dark fur is almost entirely replaced with white fur. In captivity, this does not usually happen as animals maintained as pets are generally housed indoors and exposed to artificial light that prevents the recognition of short winter daylengths. In the wild, they originate from the wheat fields of Kazakhstan, the meadows of Mongolia and Siberia, and the birch stands of Manchuria. Winter white dwarf hamsters are common as pets in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Campbell's Dwarf Hamster
Campbell's dwarf hamster (''Phodopus campbelli'') is a species of hamster in the genus ''Phodopus''. It was given its common name by Oldfield Thomas in honor of Charles William Campbell, who collected the first specimen in Mongolia on July 1, 1902. It is distinguished from the closely related Djungarian hamster as it has smaller ears and no dark fur on its Crown (anatomy), crown. Campbell's dwarf hamster typically has a narrow Primitive markings#Dorsal stripe, dorsal stripe compared to the Djungarian hamster and grey fur on the stomach. This hamster may be raised in captivity and kept as a small pet. In the wild, the breeding season for Campbell's dwarf hamster varies by location. For example, the breeding season begins towards the middle of April in Tuva and towards the end of April in Mongolia. However, in captivity, there is no fixed breeding season and they can breed frequently throughout the year. Females are usually sexually mature at two months of age and the gestation pe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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