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Microcotyle Aigoi
''Microcotyle aigoi'' is a species of monogenean, parasitic on the gills of a marine fish. It belongs to the family Microcotylidae.石井信太郎・澤田利貞 (1937). 外部寄生性吸蟲類ノ研究. 日本寄生虫学会記事 9: 93-97. (Ishii, N. and Sawada, T. (1937). tudies on the ectoparasitic trematodes Nihon Kiseichū Gakkai Kiji 9: 3-97. n Japanese Morphology ''Microcotyle aigoi'' is 2-3.7 mm in length and 0.2-0.4 mm in width and has the general morphology of all species of ''Microcotyle'', with a flat body, comprising an anterior part which contains most organs and a posterior part called the haptor. The haptor is symmetrical and bears a number of clamps, arranged as two rows, one on each side. The clamps of the haptor attach the animal to the gill of the fish. There are also two small buccal suckers at the anterior extremity. The digestive organs include an anterior, terminal mouth, a muscular pharynx, and a posterior intestine with two lateral blind-end ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microcotyle Mouwoi
''Microcotyle mouwoi'' is a species of monogenea, parasitic on the gills of a marine fish. It belongs to the family Microcotylidae.石井信太郎・澤田利貞 (1937). 外部寄生性吸蟲類ノ研究. 日本寄生虫学会記事 9: 93-97. (Ishii, N. and Sawada, T. (1937). tudies on the ectoparasitic trematodes Nihon Kiseichū Gakkai Kiji 9: 3-97. n JapaneseIshii, Nobutaro, & Sawada, Toshisada (1938). Studies on the ectoparasitic trematodes. Livro jubilar do Professor Lauro Travassos. Editado para commemorar o 25 anniversario de suas actividades scientificas (1913-1938). pp.231-243. Rio de Janeiro. Taxonomy ''Microcotyle mouwoi'' was initially described from the gills of ''Epinephelus chlorostigma'' and ''Siganus fuscescens'' off Japan. Subsequently, it was categorized under the new genus ''Solostamenides'' and termed as ''Solostamenides mouwoi''.Unnithan, R. V. (1971). On the functional morphology of a new fauna of Monogenoidea on fishes from Trivandrum and environs. Part ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sucker (zoology)
A sucker in zoology refers to a specialised attachment organ of an animal. It acts as an adhesion device in parasitic worms, several flatworms, cephalopods, certain fishes, amphibians, and bats. It is a muscular structure for suction on a host or substrate. In parasitic annelids, flatworms and roundworms, suckers are the organs of attachment to the host tissues. In tapeworms and flukes, they are a parasitic adaptation for attachment on the internal tissues of the host, such as intestines and blood vessels. In roundworms and flatworms they serve as attachment between individuals particularly during mating. In annelids, a sucker can be both a functional mouth and a locomotory organ. The structure and number of suckers are often used as basic taxonomic diagnosis between different species, since they are unique in each species. In tapeworms there are two distinct classes of suckers, namely "bothridia" for true suckers, and " bothria" for false suckers. In digeneal flukes there a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Japan
Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north toward the East China Sea, Philippine Sea, and Taiwan in the south. Japan is a part of the Ring of Fire, and spans an archipelago of 6852 islands covering ; the five main islands are Hokkaido, Honshu (the "mainland"), Shikoku, Kyushu, and Okinawa. Tokyo is the nation's capital and largest city, followed by Yokohama, Osaka, Nagoya, Sapporo, Fukuoka, Kobe, and Kyoto. Japan is the eleventh most populous country in the world, as well as one of the most densely populated and urbanized. About three-fourths of the country's terrain is mountainous, concentrating its population of 123.2 million on narrow coastal plains. Japan is divided into 47 administrative prefectures and eight traditional regions. The Greater Tokyo Ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Siganidae
Rabbitfishes or spinefoots are perciform fishes in the family Siganidae. The 29 species are in a single genus, ''Siganus''. In some now obsolete classifications, the species having prominent face stripes—colloquially called foxfaces–are in the genus ''Lo''. Other species, such as the masked spinefoot (''S. puellus''), show a reduced form of the stripe pattern. Rabbitfishes are native to shallow waters in the Indo-Pacific, but '' S. luridus'' and '' S. rivulatus'' have become established in the eastern Mediterranean via Lessepsian migration. They are commercially important food fish, and can be used in the preparation of dishes such as '' bagoong''. Taxonomy The Siganidae was first formally described as a family in 1837 by the Scottish naval surgeon, naturalist and arctic explorer Sir John Richardson. The genus ''Siganus'' was described in 1775 by the Danish zoologist Johan Christian Fabricius with ''Siganus rivulatus'', a species also described by Fabricius in 17 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Siganus Fuscescens
''Siganus fuscescens'', the mottled spinefoot, black rabbitfish, black spinefoot, dusky rabbitfish, fuscous rabbitfish, happy moments, mi mi, pearl-spotted spinefoot, pin-spotted spinefoot, stinging bream or West Australian rabbitfish, is a species of marine ray-finned fish, a rabbitfish belonging to the family Siganidae. It is found in the Western Pacific Ocean. Taxonomy ''Siganus fuscescens'' was first formally described in 1782 as ''Centrogaster fuscescens'' by the Dutch naturalist Martinus Houttuyn with the type locality given as Nagasaki. This taxon is largely sympatric with the white-spotted spinefoot ('' Siganus canaliculatus'') and these taxa are also very similar in appearance. Molecular analyses in 2011 found that there were three separate lineages within ''S. canaliculatus'' and ''S. fuscescens'', that these lineages interbred and that each lineage had specimens which referred to either taxon, this suggests that ''S. canaliculatus'' is a synonym of ''S. fuscescens'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aigo200611
Aigo (stylized as aigo) is the trade name of China, Chinese consumer electronics company Beijing Huaqi Information Digital Technology Co Ltd.Go Aigo The Economist, Jul 31st 2008 It is headquartered in the Ideal Plaza () in Haidian District, Beijing. History Beijing Huaqi Information Digital Technology Co Ltd (北京华旗资讯科技发展有限公司) is a consumer electronics manufacturer headquartered in Beijing. It was founded by Féng Jūn, who is the current president, in 1993. The company initially produced keyboards. aigo may be participating in a trend that sees Chinese nationals preferring to purchase locally produced durable goods.[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Testicle
A testicle or testis (plural testes) is the male reproductive gland or gonad in all bilaterians, including humans. It is homologous to the female ovary. The functions of the testes are to produce both sperm and androgens, primarily testosterone. Testosterone release is controlled by the anterior pituitary luteinizing hormone, whereas sperm production is controlled both by the anterior pituitary follicle-stimulating hormone and gonadal testosterone. Structure Appearance Males have two testicles of similar size contained within the scrotum, which is an extension of the abdominal wall. Scrotal asymmetry, in which one testicle extends farther down into the scrotum than the other, is common. This is because of the differences in the vasculature's anatomy. For 85% of men, the right testis hangs lower than the left one. Measurement and volume The volume of the testicle can be estimated by palpating it and comparing it to ellipsoids of known sizes. Another method is to use calip ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ovary
The ovary is an organ in the female reproductive system that produces an ovum. When released, this travels down the fallopian tube into the uterus, where it may become fertilized by a sperm. There is an ovary () found on each side of the body. The ovaries also secrete hormones that play a role in the menstrual cycle and fertility. The ovary progresses through many stages beginning in the prenatal period through menopause. It is also an endocrine gland because of the various hormones that it secretes. Structure The ovaries are considered the female gonads. Each ovary is whitish in color and located alongside the lateral wall of the uterus in a region called the ovarian fossa. The ovarian fossa is the region that is bounded by the external iliac artery and in front of the ureter and the internal iliac artery. This area is about 4 cm x 3 cm x 2 cm in size.Daftary, Shirish; Chakravarti, Sudip (2011). Manual of Obstetrics, 3rd Edition. Elsevier. pp. 1-16. . ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vagina
In mammals, the vagina is the elastic, muscular part of the female genital tract. In humans, it extends from the vestibule to the cervix. The outer vaginal opening is normally partly covered by a thin layer of mucosal tissue called the hymen. At the deep end, the cervix (neck of the uterus) bulges into the vagina. The vagina allows for sexual intercourse and birth. It also channels menstrual flow, which occurs in humans and closely related primates as part of the menstrual cycle. Although research on the vagina is especially lacking for different animals, its location, structure and size are documented as varying among species. Female mammals usually have two external openings in the vulva; these are the urethral opening for the urinary tract and the vaginal opening for the genital tract. This is different from male mammals, who usually have a single urethral opening for both urination and reproduction. The vaginal opening is much larger than the nearby urethral ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gill
A gill () is a respiratory organ that many aquatic organisms use to extract dissolved oxygen from water and to excrete carbon dioxide. The gills of some species, such as hermit crabs, have adapted to allow respiration on land provided they are kept moist. The microscopic structure of a gill presents a large surface area to the external environment. Branchia (pl. branchiae) is the zoologists' name for gills (from Ancient Greek ). With the exception of some aquatic insects, the filaments and lamellae (folds) contain blood or coelomic fluid, from which gases are exchanged through the thin walls. The blood carries oxygen to other parts of the body. Carbon dioxide passes from the blood through the thin gill tissue into the water. Gills or gill-like organs, located in different parts of the body, are found in various groups of aquatic animals, including mollusks, crustaceans, insects, fish, and amphibians. Semiterrestrial marine animals such as crabs and mudskippers have gill ch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
In biology, a species is the basic unit of Taxonomy (biology), classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can reproduction, produce Fertility, fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, morphology (biology), morphology, behaviour or ecological niche. In addition, paleontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. However, only about 14% of these had been described by 2011. All species (except viruses) are given a binomial nomenclature, two-part name, a "binomial". The first part of a binomial is the genus to which the species belongs. The second part is called the specifi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clamp (zoology)
Clamps are the main attachment structure of the Polyopisthocotylean monogeneans. Bychowsky, B. E. (1957) Monogenetic Trematodes. Their systematic and phylogeny. Akad. Nauka. USSR. English translation by the American Institute of Biological Science, Washington. 509 pp. These ectoparasitic worms have a variable number of clamps on their haptor (the posterior attachment organ); each clamp is attached to the host fish, generally to its gill. Clamps include sclerotised elements, called the sclerite A sclerite ( Greek , ', meaning " hard") is a hardened body part. In various branches of biology the term is applied to various structures, but not as a rule to vertebrate anatomical features such as bones and teeth. Instead it refers most commonl ...s, and muscles. The structure of clamps varies according to the groups within the Polyopisthocotylean monogeneans; microcotylids have relatively simple clamps, whereas gastrocotylids have more complex clamps. References {{Reflist Pla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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