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Sexual Coercion Among Animals
Sexual coercion among animals is the use of violence, threats, harassment, and other tactics to help them forcefully copulate.Smuts, Barbara B"Male Aggression and Sexual Coercion of Females in Nonhuman Primates and Other Mammals: Evidence and Theoretical Implications" ''Advances in the Study of Behavior'' 22 (1993) Such behavior has been compared to sexual assault, including rape, among humans. In nature, males and females usually differ in reproductive fitness optima.Han, C. S. & Jablonski, P. G"Female genitalia concealment promotes intimate male courtship in a water strider" ''PLoS ONE'' 4, e5793 (2009). Males generally prefer to maximize their number of offspring, and therefore their number of mates; females, on the other hand, tend to care more for their offspring and have fewer mates.Gage, M. J. G., Parker, G. a, Nylin, S. & Wiklund, C"Sexual selection and speciation in mammals, butterflies and spiders" ''Proceedings: Biological Sciences'' 269, 2309–16 (2002). Because of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Copulation (zoology)
In zoology, copulation is animal sexual behavior in which a male introduces sperm into the female's body, especially directly into her reproductive tract. This is an aspect of mating. Many aquatic animals use external fertilization, whereas internal fertilization may have developed from a need to maintain gametes in a liquid medium in the Late Ordovician epoch. Internal fertilization with many vertebrates (such as all reptiles, some fish, and most birds) occurs via cloacal copulation, known as cloacal kiss (see also hemipenis), while most mammals copulate vaginally, and many basal vertebrates reproduce sexually with external fertilization. In spiders and insects Spiders are often confused with insects, but they are not insects; instead, they are arachnids. Spiders have separate male and female sexes. Before mating and copulation, the male spider spins a small web and ejaculates on to it. He then stores the sperm in reservoirs on his large pedipalps, from which he tran ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lygaeidae
The Lygaeidae are a family in the Hemiptera (true bugs), with more than 110 genera in four subfamilies. The family is commonly referred to as seed bugs, and less commonly, milkweed bugs, or ground bugs. Many species feed on seeds, some on sap or seed pods, others are omnivores and a few, such as the wekiu bug, are insectivores. Insects in this family are distributed across the world. The family was vastly larger, but numerous former subfamilies have been removed and given independent family status, including the Artheneidae, Blissidae, Cryptorhamphidae, Cymidae, Geocoridae, Heterogastridae, Ninidae, Oxycarenidae and Rhyparochromidae, which together constituted well over half of the former family. The bizarre and mysterious beetle-like Psamminae were formerly often placed in the Piesmatidae, but this is almost certainly incorrect. Their true affiliations are not entirely resolved. Distinguishing characteristics Lygaeidae are oval or elongate in body shape and have fou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hemipenis
A hemipenis (: hemipenes) is one of a pair of intromittent organs of male squamates (snakes and lizards). Hemipenes are usually held inverted within the body, and are everted for reproduction via erectile tissue, much like that in the human penis. They come in a variety of shapes, depending on species, with ornamentation such as spikes. Background The hemipenis is the intromittent organ of Squamata, which is the second largest order of vertebrates with over 9,000 species distributed around the world. They differ from the intromittent organs of most other amniotes such as mammals, archosaurs and turtles that have a single genital tubercle, as squamates have paired, separate genitalia. Squamate hemipenes also develop from a different cell origin, originating from the same embryonic cells that produce the limbs, whereas mammalian penises arise from the embryonic cells that develop the tail. Evolution Much debate continues regarding the evolutionary origin of hemipenes and their ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thamnophis Sirtalis Parietalis
The red-sided garter snake (''Thamnophis sirtalis parietalis'') is a subspecies of the common garter snake, in the subfamily Natricinae of the family Colubridae. This slender subspecies of natricine snake is indigenous to North America and is one of the recognized subspecies of ''Thamnophis sirtalis''. This subspecies is widely spread across northern United States and southern Canada. Appearance The red-sided garter snakes have an upper row of well-defined red spots, and lower row with patches of red color that smear on the dark area on either side of their back. These snakes have multiple yellow stripes present on their body. ''Thamnophis sirtalis parietalis'' is Sexual dimorphism, sexually dimorphic, where females are usually larger than males. The females can range from 18 to 24 inches in length, whereas males can grow up to 12 to 18 inches. The snakes of this subspecies are mainly non-venomous. Phenology and habitat use Winter temperatures near their habitat are very h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Springer Science+Business Media
Springer Science+Business Media, commonly known as Springer, is a German multinational publishing company of books, e-books and peer-reviewed journals in science, humanities, technical and medical (STM) publishing. Originally founded in 1842 in Berlin, it expanded internationally in the 1960s, and through mergers in the 1990s and a sale to venture capitalists it fused with Wolters Kluwer and eventually became part of Springer Nature in 2015. Springer has major offices in Berlin, Heidelberg, Dordrecht, and New York City. History Julius Springer founded Springer-Verlag in Berlin in 1842 and his son Ferdinand Springer grew it from a small firm of 4 employees into Germany's then second-largest academic publisher with 65 staff in 1872.Chronology ". Springer Science+Business Media. In 1964, Springer expanded its business internationally, op ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Union For The Study Of Social Insects
The International Union for the Study of Social Insects has at its purpose to promote and encourage the study of social insects and other social organisms in the broadest sense. Both research and the dissemination of knowledge about social insects and other social organisms through publications, educational programs, and activities are encouraged. The Union further pursues these objectives via the organization of Congresses and Symposia, publication of the journal Insectes Sociaux, and recognition of distinguished service with awards. National and regional sections play a key role in the IUSSI, with the sections organizing meetings, symposia, and newsletters. The Union was founded in 1951 as a result of discussions at the International Entomological Congress in Amsterdam. Key figures in the establishment of the IUSSI were Pierre-Paul Grassé (France), T. C. Schneirla (U.S.A.), Carlo Jucci (Italy), K. Gösswald (Germany), D. R. Gonçalves (Brazil), anTohru Uchida(Japan). Grassé ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Insectes Sociaux
''Insectes sociaux'' is a scientific journal dedicated to the study of social insects. It is the official journal of the International Union for the Study of Social Insects (IUSSI), and is published by Birkhäuser Verlag Birkhäuser was a Switzerland, Swiss publisher founded in 1879 by Emil Birkhäuser. It was acquired by Springer Science+Business Media in 1985. Today it is an imprint (trade name), imprint used by two companies in unrelated fields: * Springer co .... References External links * Entomology journals and magazines Academic journals associated with international learned and professional societies Springer Science+Business Media academic journals {{zoo-journal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gerris Gracilicornis
''Gerris'' is a insect genus in the family Gerridae (water striders). Species The genus ''Gerris'' contains 43 species in 3 subgenera: Subgenus ''Gerris'' Subgenus ''Gerriselloides'' * '' Gerris asper'' (Fieber, 1860) * '' Gerris brachynotus'' Horváth, 1907 * '' Gerris kiritshenkoi'' Kanyukova, 1979 * '' Gerris lateralis'' Schummel, 1832 Subgenus ''Macrogerris'' * '' Gerris cui'' Esaki, 1925 * '' Gerris gracilicornis'' Horváth, 1879 * '' Gerris insularis'' Motschulsky, 1866 * '' Gerris issikii'' Miyamoto, 1961 * '' Gerris lundbladi'' Andersen & Chen, 1993 * '' Gerris tigrinus'' Brown, 1949 * '' Gerris yezoensis'' Miyamoto, 1958 Mating system Species of genus ''Gerris'' demonstrate a high degree of female control over most aspects of mating and there is significant evidence that supports antagonistic coevolution, and the convenience polyandry hypothesis of multiple matings. There is evidence to suggest that the post-copulatory guarding exhibited by ''Gerris buenoi'' - and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gerridae
The Gerridae are a family of insects in the order Hemiptera, commonly known as water striders, water skeeters, water scooters, water bugs, pond skaters, water skippers, water gliders, water skimmers or puddle flies. They are true bugs of the suborder Heteroptera and have mouthparts evolved for piercing and sucking. A distinguishing feature is the ability to move on top of the water's surface, making them pleuston (surface-living) animals. They can be found on most ponds, rivers or lakes, and over 1,700 species of gerrids have been described, 10% of them being marine. While 90% of gerrids are freshwater bugs, the oceanic '' Halobates'' makes the family quite exceptional among insects. The genus ''Halobates'' was first heavily studied between 1822 and 1883 when Francis Buchanan White collected several different species during the Challenger Expedition. Around this time, Eschscholtz discovered three species of the Gerridae, bringing attention to the species, though little of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Intimidation
Intimidation is a behaviour and legal wrong which usually involves deterring or coercing an individual by threat of violence. It is in various jurisdictions a crime and a civil wrong (tort). Intimidation is similar to menacing, coercion, terrorizing and assault in the traditional sense. This includes intentional behaviors of forcing another person to experience general discomfort such as humiliation, embarrassment, inferiority, limited freedom, etc and the victim might be targeted based on multiple factors like gender, race, class, skin color, competency, knowledge, wealth, temperament, etc. Intimidation is done for making the other person submissive (also known as cowing), to destabilize/undermine the other, to force compliance, to hide one's insecurities, to socially valorize oneself, etc. There are active and passive coping mechanisms against intimidation that include, but are not limited to, not letting the intimidator invade your personal dignity and space, addressing thei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bornean Orangutan
The Bornean orangutan (''Pongo pygmaeus'') is an orangutan species endemic to the island of Borneo. It belongs to the only genus of great apes native to Asia and is the largest of the three ''Pongo'' species. It has a coarse, reddish coat and up to long arms. It is sexually dimorphic — males are larger than females and develop large cheek pads (flanges), for example. The Bornean orangutan inhabits Borneo lowland rain forests and Borneo montane rain forests up to an elevation of . Its diet includes fruits, seeds, flowers, bird eggs, sap and vines. It is highly intelligent, displaying tool use and distinct cultural patterns. It is critically endangered, with deforestation, palm oil plantations, and hunting posing a serious threat to its survival. Taxonomy The Bornean orangutan and the Sumatran orangutan diverged about 400,000 years ago, with a continued low level of gene flow between them since then. The two orangutan species were considered merely subspecies until 1996; they ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
