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Eciton Burchellii
''Eciton burchellii'' is a species of New World army ant in the genus ''Eciton''. This species performs expansive, organized swarm raids that give it the informal name, ''Eciton'' army ant. This species displays a high degree of worker polymorphism (biology), polymorphism. Sterile workers are of four discrete size-castes: minors, medias, porters (sub-majors), and soldiers (majors). Soldiers have much larger heads and specialized mandibles for defense. In lieu of underground excavated nests, colonies of ''E. burchellii'' form temporary living nests known as bivouac (ants), bivouacs, which are composed of hanging live worker bodies and which can be disassembled and relocated during colony emigrations. ''Eciton burchellii'' colonies cycle between stationary phases and nomadic phases when the colony emigrates nightly. These alternating phases of emigration frequency are governed by coinciding brood developmental stages. Group foraging efforts known as "raids" are maintained by the use ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Obadiah Westwood
John Obadiah Westwood (22 December 1805 – 2 January 1893) was an English entomologist and archaeologist also noted for his artistic talents. He published several illustrated works on insects and antiquities. He was among the first entomologists with an academic position at Oxford University. He was a natural theologian, staunchly anti-Darwinian, and sometimes adopted a quinarian viewpoint. Although he never travelled widely, he described species from around the world on the basis of specimens, especially of the larger, curious, and colourful species, obtained by naturalists and collectors in England. Life and work Westwood was born in a Quaker family in Sheffield, the son of medal and die maker, John Westwood (1774–1850) and Mary, daughter of Edward Betts. He went to school at the Friends' School, Sheffield and later at Lichfield when the family moved there. He apprenticed briefly to become a solicitor and worked briefly as a partner in a firm but gave up a career in law f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ant Colony
An ant colony is a population of a single ant species capable to maintain its complete lifecycle. Ant colonies are eusocial, communal, and efficiently organized and are very much like those found in other social Hymenoptera, though the various groups of these developed sociality independently through convergent evolution. The typical colony consists of one or more egg-laying queens, numerous sterile females (workers, soldiers) and, seasonally, many winged sexual males and females. In order to establish new colonies, ants undertake flights that occur at species-characteristic times of the day. Swarms of the winged sexuals (known as alates) depart the nest in search of other nests. The males die shortly thereafter, along with most of the females. A small percentage of the females survive to initiate new nests. Names The term "ant colony" refers to a population of workers, reproductive individuals, and brood that live together, cooperate, and treat one another non-aggressively. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polygyny
Polygyny (; from Neoclassical Greek πολυγυνία (); ) is the most common and accepted form of polygamy around the world, entailing the marriage of a man with several women. Incidence Polygyny is more widespread in Africa than in any other continent. Some scholars see the slave trade's impact on the male-to-female sex ratio as a key factor in the emergence and fortification of polygynous practices in regions of Africa. Polygyny is most common in a region known as the "polygamy belt" in West Africa and Central Africa, with the countries estimated to have the highest polygamy prevalence in the world being Burkina Faso, Mali, Gambia, Niger and Nigeria. In the region of sub-Saharan Africa, polygyny is common and deeply rooted in the culture, with 11% of the population of sub-Saharan Africa living in such marriages (25% of the Muslim population and 3% of the Christian population, as of 2019). Polygyny is especially widespread in West Africa, with the countries estimated to h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Polyandry
Polyandry (; ) is a form of polygamy in which a woman takes two or more husbands at the same time. Polyandry is contrasted with polygyny, involving one male and two or more females. If a marriage involves a plural number of "husbands and wives" participants of each gender, then it can be called polygamy, group marriage, group or conjoint marriage. In its broadest use, polyandry refers to sexual relations with multiple males within or without marriage. Of the 1,231 societies listed in the 1980 Ethnographic Atlas, 186 were found to be monogamous, 453 had occasional polygyny, 588 had more frequent polygyny, and 4 had polyandry.''Ethnographic Atlas Codebook'' derived from George P. Murdock's ''Ethnographic Atlas'' recording the marital composition of 1,231 societies from 1960 to 1980. Polyandry is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Patriline
Patrilineality, also known as the male line, the spear side or agnatic kinship, is a common kinship system in which an individual's family membership derives from and is recorded through their father's lineage. It generally involves the inheritance of property, rights, names, or titles by persons related through male kin. This is sometimes distinguished from cognate kinship, through the mother's lineage, also called the spindle side or the distaff side. A patriline ("father line") is a person's father, and additional ancestors, as traced only through males. Traditionally and historically people would identify the person's ethnicity with the father's heritage and ignore the maternal ancestry in the ethnic factor. In the Bible In the Bible, family and tribal membership appears to be transmitted through the father. For example, a person is considered to be a priest or Levite, if his father is a priest or Levite, and the members of all the Twelve Tribes are called Israelites because ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caste
Caste is a form of social stratification characterised by endogamy, hereditary transmission of a style of life which often includes an occupation, ritual status in a hierarchy, and customary social interaction and exclusion based on cultural notions of purity and pollution. * Quote: "caste ort., casta=basket ranked groups based on heredity within rigid systems of social stratification, especially those that constitute Hindu India. Some scholars, in fact, deny that true caste systems are found outside India. The caste is a closed group whose members are severely restricted in their choice of occupation and degree of social participation. Marriage outside the caste is prohibited. Social status is determined by the caste of one's birth and may only rarely be transcended." * Quote: "caste, any of the ranked, hereditary, endogamous social groups, often linked with occupation, that together constitute traditional societies in South Asia, particularly among Hindus in India. Althoug ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Queen (insect)
The gyne (, from Greek γυνή, "woman") is the primary reproductive female caste of social insects (especially ants, wasps, and bees of order Hymenoptera, as well as termites). Gynes are those destined to become queens, whereas female workers are typically barren and cannot become queens. Having a queen is what makes a "queenright" hive, nest, or colony of eusocial insects. A colony with multiple queens is said to be a polygyne form, whereas one with only one is a monogyne form. The red imported fire ant is known to have colonies in both polygyne and monogyne forms. The small red ant, ''Leptothorax acervorum'', has colonies that switch from monogyny to polygyny as a result of seasonal fluctuations. The little fire ant ''Wasmannia auropunctata'' produces unique kinds of meiotic oocytes with a drastic reduction in recombination. These oocytes may either fuse together for gyne production ( automictic parthenogenesis with central fusion) or be fertilized by male gametes for the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eciton Burchellii Army Ants
''Eciton'' is a New World army ant genus that contains the most familiar species of army ants. The most predominant and well-known species is ''Eciton burchellii'', which is also more commonly known as the army ant and is considered the type species. ''Eciton burchellii'' and ''Eciton hamatum'' are the most visible and best studied of the New World army ants because they forage above ground and during the day, in enormous raiding swarms. Their range stretches from southern Mexico to the northern part of Argentina. Life cycle ''Eciton'' army ants have a bi-phasic lifestyle in which they alternate between a nomadic phase and a statary phase. In the statary phase, which lasts about three weeks, the ants remain in the same location every night. They arrange their own living bodies into a nest, protecting the queen and her eggs in the middle. Such a temporary home is called a " bivouac". In the nomadic phase the ants move their entire colony to a new location nearly every night for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Evergreen State College
The Evergreen State College is a public liberal arts college in Olympia, Washington. Founded in 1967, it offers a non-traditional undergraduate curriculum in which students have the option to design their own study towards a degree or follow a pre-determined path of study. Full-time students can enroll in interdisciplinary academic programs, in addition to stand-alone classes. Programs typically offer students the opportunity to study several disciplines in a coordinated manner. Faculty write substantive narrative evaluations of students' work in place of issuing grades. Evergreen's main campus, which includes its own saltwater beach, spans 1,000 acres of forest close to the southern end of the Puget Sound. Evergreen also has a satellite campus in nearby Tacoma. The school offers a Bachelor of Arts in Liberal Arts and Bachelor of Science, Master of Environmental Studies, Master in Teaching, Master of Public Administration, and Master of Public Administration in Tribal Governanc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Taxonomist
In biology, taxonomy () is the scientific study of naming, defining ( circumscribing) and classifying groups of biological organisms based on shared characteristics. Organisms are grouped into taxa (singular: taxon) and these groups are given a taxonomic rank; groups of a given rank can be aggregated to form a more inclusive group of higher rank, thus creating a taxonomic hierarchy. The principal ranks in modern use are domain, kingdom, phylum (''division'' is sometimes used in botany in place of ''phylum''), class, order, family, genus, and species. The Swedish botanist Carl Linnaeus is regarded as the founder of the current system of taxonomy, as he developed a ranked system known as Linnaean taxonomy for categorizing organisms and binomial nomenclature for naming organisms. With advances in the theory, data and analytical technology of biological systematics, the Linnaean system has transformed into a system of modern biological classification intended to reflect the evolu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amazon Manaus Forest
Amazon most often refers to: * Amazons, a tribe of female warriors in Greek mythology * Amazon rainforest, a rainforest covering most of the Amazon basin * Amazon River, in South America * Amazon (company), an American multinational technology company Amazon or Amazone may also refer to: Places South America * Amazon Basin (sedimentary basin), a sedimentary basin at the middle and lower course of the river * Amazon basin, the part of South America drained by the river and its tributaries * Amazon Reef, at the mouth of the Amazon basin Elsewhere * 1042 Amazone, an asteroid * Amazon Creek, a stream in Oregon, US People * Amazon Eve (born 1979), American model, fitness trainer, and actress * Lesa Lewis (born 1967), American professional bodybuilder nicknamed "Amazon" Art and entertainment Fictional characters * Amazon (Amalgam Comics) * Amazon, an alias of the Marvel supervillain Man-Killer * Amazons (DC Comics), a group of superhuman characters * The Amazon, a ''Di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Compound Eye
A compound eye is a visual organ found in arthropods such as insects and crustaceans. It may consist of thousands of ommatidia, which are tiny independent photoreception units that consist of a cornea, lens, and photoreceptor cells which distinguish brightness and color. The image perceived by this arthropod eye is a combination of inputs from the numerous ommatidia, which are oriented to point in slightly different directions. Compared with single-aperture eyes, compound eyes have poor image resolution; however, they possess a very large view angle and the ability to detect fast movement and, in some cases, the polarization of light. Because a compound eye is made up of a collection of ommatidia, each with its own lens, light will enter each ommatidium instead of using a single entrance point. The individual light receptors behind each lens are then turned on and off due to a series of changes in the light intensity during movement or when an object in moving, creating a flic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
