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Protanthea Simplex
''Protanthea simplex'' is a species of sea anemone found in deep water off the coasts of north west Europe. It is the only species in the monotypic genus ''Protanthea''. Description ''P. simplex'' is a delicate sea anemone. The tentacles are non-retractable and have a frosty appearance and are usually held outstretched. The column is salmon pink, flared below the tentacles and reaches lengths of up to two centimetres. It has a flattened, lightly adherent base bulging out below the pedal disc. There are up to 200 slender, translucent, white or pale pink tentacles up to one and a half centimetres long arranged in five rings. When the orangeish-pink gonads are ripe, they may be visible through the wall of the column. Distribution This species is found in both shallow and deep water around the western coast of Scotland from the Firth of Clyde northward, particularly in sea lochs. It is also found round the coasts of the Skagerrak and northern Kattegat and in one location in Connemara ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
In biology, a species is the basic unit of 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 produce fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, 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 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 specific name or the specific epithet (in botanical nomenclature, also sometimes i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Suspension Feeder
Filter feeders are a sub-group of suspension feeding animals that feed by straining suspended matter and food particles from water, typically by passing the water over a specialized filtering structure. Some animals that use this method of feeding are clams, krill, sponges, baleen whales, and many fish (including some sharks). Some birds, such as flamingos and certain species of duck, are also filter feeders. Filter feeders can play an important role in clarifying water, and are therefore considered ecosystem engineers. They are also important in bioaccumulation and, as a result, as indicator organisms. Fish Most forage fish are filter feeders. For example, the Atlantic menhaden, a type of herring, lives on plankton caught in midwater. Adult menhaden can filter up to four gallons of water a minute and play an important role in clarifying ocean water. They are also a natural check to the deadly red tide. Extensive article on the role of menhaden in the ecosystem and possible r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hexacorallia Genera
Hexacorallia is a class of Anthozoa comprising approximately 4,300 species of aquatic organisms formed of polyps, generally with 6-fold symmetry. It includes all of the stony corals, most of which are colonial and reef-forming, as well as all sea anemones, and zoanthids, arranged within five extant orders. The hexacorallia are distinguished from another class of Anthozoa, Octocorallia, in having six or fewer axes of symmetry in their body structure; the tentacles are simple and unbranched and normally number more than eight. These organisms are formed of individual soft polyps which in some species live in colonies and can secrete a calcite skeleton. As with all Cnidarians, these organisms have a complex life cycle including a motile planktonic phase and a later characteristic sessile phase. Hexacorallia also include the significant extinct order of rugose corals. Phylogeny Hexacorallia is considered to be monophyletic, that is all contained species are descended from a common ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gonactiniidae
Gonactiniidae is a family of anthozoans in the order Actinaria Sea anemones are a group of predatory marine invertebrates of the order Actiniaria. Because of their colourful appearance, they are named after the ''Anemone'', a terrestrial flowering plant. Sea anemones are classified in the phylum Cnidaria, .... Genera *'' Gonactinia'' Sars, 1851Sars, M. (1851). Beretning om en i Sommeren 1849 foretagen zoologisk Reise i Lofoten of Finmarken. ''Nyt Magazin for Naturvidenskaberne'', 6(10), 121–211. *'' Protanthea'' Carlgren, 1891Carlgren, O. (1891). ''Protanthea simplex'' n. gen. n. sp., eine eigentümliche Actinie. Vorläufige Mitteilung. ''Öfversigt af Kongliga Vetenskaps-Akademiens Förhandlingar'', 48, 81–89. References Metridioidea Cnidarian families {{Actiniaria-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Synopses Of The British Fauna
{{italic title ''Synopses of the British Fauna'' is a series of identification guides, published by Linnean Society of London, The Linnean Society and The Estuarine and Coastal Sciences Association. Each volume in the series provides and in-depth analysis of a group of animals and is designed to bridge the gap between the standard field guide and more specialised monograph or treatise. The series is now published by Field Studies Council, The Field Studies Council on behalf of The Linnean Society and The Estuarine and Coastal Sciences Association. The series is designed for use in the field and is kept as user friendly as possible with technical terminology kept to a minimum and a glossary of terms provided, although the complexity of the subject matter makes the books more suitable for the more experienced practitioner. History of the series On 11 March 1943, at a meeting of Linnean Society of London, The Linnean Society in Burlington House, TH Savoy presented his "Synopsis o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asexual Reproduction
Asexual reproduction is a type of reproduction that does not involve the fusion of gametes or change in the number of chromosomes. The offspring that arise by asexual reproduction from either unicellular or multicellular organisms inherit the full set of genes of their single parent and thus the newly created individual is genetically and physically similar to the parent or an exact clone of the parent. Asexual reproduction is the primary form of reproduction for single-celled organisms such as archaea and eubacteria, bacteria. Many Eukaryote, eukaryotic organisms including plants, animals, and Fungus, fungi can also reproduce asexually. In vertebrates, the most common form of asexual reproduction is parthenogenesis, which is typically used as an alternative to sexual reproduction in times when reproductive opportunities are limited. Komodo dragons and some monitor lizards can also reproduce asexually. While all prokaryotes reproduce without the formation and fusion of gametes, m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Planula
A planula is the free-swimming, flattened, ciliated, bilaterally symmetric larval form of various cnidarian species and also in some species of Ctenophores. Some groups of Nemerteans also produce larvae that are very similar to the planula, which are called planuliform larva. Development The planula forms either from the fertilized egg of a medusa, as is the case in scyphozoans and some hydrozoans, or from a polyp, as in the case of anthozoans. Depending on the species, the planula either metamorphoses directly into a free-swimming, miniature version of the mobile adult form, or navigates through the water until it reaches a hard substrate (many may prefer specific substrates) where it anchors and grows into a polyp. The miniature-adult types include many open-ocean scyphozoans. The attaching types include all anthozoans with a planula stage, many coastal scyphozoans, and some hydrozoans. Feeding and locomotion The planulae of the subphylum Medusozoa have no mouth, and no ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Muscle Tone
In physiology, medicine, and anatomy, muscle tone (residual muscle tension or tonus) is the continuous and passive partial muscle contraction, contraction of the muscles, or the muscle's resistance to passive stretch during resting state.O’Sullivan, S. B. (2007). Examination of motor function: Motor control and motor learning. In S. B. O’Sullivan, & T. J. Schmitz (Eds), Physical rehabilitation (5th ed.) (pp. 233-234). Philadelphia, Pennsylvania: F. A. Davis Company. It helps to maintain neutral spine, posture and declines during REM sleep. Purpose If a sudden muscle pull, pull or stretch occurs, the body responds by automatically increasing the muscle's tension, a reflex which helps guard against danger as well as helping maintain balance disorder, balance. Such near-continuous innervation can be thought of as a "default" or "steady state" condition for muscles. Both the Extension (kinesiology), extensor and flexion, flexor muscles are involved in the maintenance of a consta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Galway
Galway ( ; ga, Gaillimh, ) is a City status in Ireland, city in the West Region, Ireland, West of Ireland, in the Provinces of Ireland, province of Connacht, which is the county town of County Galway. It lies on the River Corrib between Lough Corrib and Galway Bay, and is the List of settlements on the island of Ireland by population, sixth most populous city on the island of Ireland and the List of urban areas in the Republic of Ireland by population, fourth most populous in the Republic of Ireland, with a population at the 2022 census of Ireland, 2022 census of 83,456. Located near an earlier settlement, Galway grew around a fortification built by the Kings of Connacht, King of Connacht in 1124. A municipal charter in 1484 allowed citizens of the by then walled city to form a Galway City Council, council and mayoralty. Controlled largely by a group of merchant families, the Tribes of Galway, the city grew into a trading port. Following a period of decline, as of the 21st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sea Anemone
Sea anemones are a group of predation, predatory marine invertebrates of the order (biology), order Actiniaria. Because of their colourful appearance, they are named after the ''Anemone'', a terrestrial flowering plant. Sea anemones are classified in the phylum Cnidaria, class Anthozoa, subclass Hexacorallia. As cnidarians, sea anemones are related to corals, jellyfish, tube-dwelling anemones, and ''hydra (genus), Hydra''. Unlike jellyfish, sea anemones do not have a Jellyfish#Life history and behavior, medusa stage in their life cycle. A typical sea anemone is a single polyp (zoology), polyp attached to a hard surface by its base, but some species live in soft sediment, and a few float near the surface of the water. The polyp has a columnar trunk topped by an oral disc with a ring of tentacles and a central mouth. The tentacles can be retracted inside the body cavity or expanded to catch passing prey. They are armed with cnidocytes (stinging cells). In many species, additional n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Connemara
Connemara (; )( ga, Conamara ) is a region on the Atlantic Ocean, Atlantic coast of western County Galway, in the west of Ireland. The area has a strong association with traditional Irish culture and contains much of the Connacht Irish-speaking Gaeltacht, which is a key part of the identity of the region and is the largest Gaeltacht in the country. Historically, Connemara was part of the territory of Iar Connacht (West Connacht). Geographically, it has many mountains (notably the Twelve Bens), peninsulas, coves, islands and small lakes. Connemara National Park is in the northwest. It is mostly rural and its largest settlement is Clifden. Etymology "Connemara" derives from the tribal name , which designated a branch of the , an early tribal grouping that had a number of branches located in different parts of . Since this particular branch of the lived by the sea, they became known as the (sea in Irish is , genitive case, genitive , hence "of the sea"). Definition One common ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kattegat
The Kattegat (; sv, Kattegatt ) is a sea area bounded by the Jutlandic peninsula in the west, the Danish Straits islands of Denmark and the Baltic Sea to the south and the provinces of Bohuslän, Västergötland, Halland and Skåne in Sweden in the east. The Baltic Sea drains into the Kattegat through the Danish Straits. The sea area is a continuation of the Skagerrak and may be seen as a bay of the North Sea, but in traditional Scandinavian usage, this is not the case. The Kattegat is a rather shallow sea and can be very difficult and dangerous to navigate because of the many sandy and stony reefs and tricky currents, which often shift. In modern times, artificial seabed channels have been dug, many reefs have been dredged by either sand pumping or stone fishing, and a well-developed light signaling network has been installed, to safeguard the very heavy international traffic of this small sea. There are several large cities and major ports in the Kattegat, including, in d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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