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Unio Tumidiformis
''Unio tumidiformis'' is a species of bivalve belonging to the family Unionidae. It is endemic to the southwestern Iberian Peninsula. Existing populations are known from the Guadiana, Mira River (Portugal), Mira, and Sado Rivers in Portugal and Spain. ''Unio tumidiformis'' is related to ''Unio crassus'' and has been considered a "race" of the latter, but a 2009 study found the two species to be clearly distinct. Description ''Unio tumidiformis'' grows to a shell length of and wet weight of . The shell is oval in shape. In a population in southern Portugal, mussels became sexually mature at the age of 2 years. The maximum observed age was 7 years. Habitat ''Unio tumidiformis'' occurs in temporary Mediterranean-type streams, surviving the dry season in pools that do not dry up. It is also known from some lakes (Lagunas de Ruidera in Spain). Its larvae (glochidia) seem to successfully develop only in fish of the genus ''Squalius'' (Cyprinidae). Conservation Populations from the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
José Da Silva E Castro
José is a predominantly Spanish and Portuguese language, Portuguese form of the given name Joseph. While spelled alike, this name is pronounced differently in each language: Spanish ; Portuguese (or ). In French, the name ''José'', pronounced , is an old vernacular form of Joseph, which is also in current usage as a given name. José is also commonly used as part of masculine name composites, such as José Manuel, José Maria or Antonio José, and also in female name composites like Maria José or Marie-José. The feminine written form is ''Josée'' as in French. In Netherlandic Dutch language, Dutch, however, ''José'' is a feminine given name and is pronounced ; it may occur as part of name composites like Marie-José or as a feminine first name in its own right; it can also be short for the name ''Josina'' and even a Dutch hypocorism of the name ''Johanna''. In England, Jose is originally a Romano-British culture, Romano-Celtic surname, and people with this family name can ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unio Crassus
''Unio crassus'', the thick shelled river mussel, is a species of freshwater mussel, an aquatic bivalve mollusk in the family Unionidae, the river mussels. MolluscaBase eds. (2023). MolluscaBase. Unio crassus Philipsson, 1788. Accessed through: World Register of Marine Species at: https://marinespecies.org/aphia.php?p=taxdetails&id=1044116 on 2023-01-09 ;Subspecies: * † ''Unio crassus jaeckeli'' Modell, 1950 * † ''Unio crassus klemmi'' Modell, 1957 Ecology As part of newly discovered reproductive behaviour, this mollusc crawls up to the edge of the water, exposing its excurrent aperture, and then lets loose a stream of water. The fountain of water often contains glochidia, and it is suggested that this spurting behavior may facilitate dispersal of mussel larvae (video). Decline The thick shelled river mussel declined during the 20th century everywhere in Europe due to deteriorating water quality, habitat fragmentation and host fish limitation. Distribution Its native d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endemic Molluscs Of The Iberian Peninsula
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsewhere. For example, the Cape sugarbird is found exclusively in southwestern South Africa and is therefore said to be ''endemic'' to that particular part of the world. An endemic species can be also be referred to as an ''endemism'' or in scientific literature as an ''endemite''. For example '' Cytisus aeolicus'' is an endemite of the Italian flora. '' Adzharia renschi'' was once believed to be an endemite of the Caucasus, but it was later discovered to be a non-indigenous species from South America belonging to a different genus. The extreme opposite of an endemic species is one with a cosmopolitan distribution, having a global or widespread range. A rare alternative term for a species that is endemic is "precinctive", which applies to s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bivalves Of Europe
Bivalvia (), in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class of marine and freshwater molluscs that have laterally compressed bodies enclosed by a shell consisting of two hinged parts. As a group, bivalves have no head and they lack some usual molluscan organs, like the radula and the odontophore. They include the clams, oysters, cockles, mussels, scallops, and numerous other families that live in saltwater, as well as a number of families that live in freshwater. The majority are filter feeders. The gills have evolved into ctenidia, specialised organs for feeding and breathing. Most bivalves bury themselves in sediment, where they are relatively safe from predation. Others lie on the sea floor or attach themselves to rocks or other hard surfaces. Some bivalves, such as the scallops and file shells, can swim. The shipworms bore into wood, clay, or stone and live inside these substances. The shell of a bivalve is composed of calc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guadalquivir
The Guadalquivir (, also , , ) is the fifth-longest river in the Iberian Peninsula and the second-longest river with its entire length in Spain. The Guadalquivir is the only major navigable river in Spain. Currently it is navigable from the Gulf of Cádiz to Seville, but in Roman times it was navigable to Córdoba. Geography The river is long and drains an area of about . It rises at Cañada de las Fuentes (village of Quesada) in the Cazorla mountain range ( Jaén), flows through Córdoba and Seville and reaches the sea at the fishing village of Bonanza, in Sanlúcar de Barrameda, flowing into the Gulf of Cádiz, in the Atlantic Ocean. The marshy lowlands at the river's mouth are known as " Las Marismas". The river borders the Doñana National Park reserve. Name The modern name of Guadalquivir comes from the Arabic ''al-wādī l-kabīr'' (), meaning "the big river". There was a variety of names for the Guadalquivir in Classical and pre-Classical times. According to Titus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Squalius
''Squalius'' is a genus of fish in the family Cyprinidae found in Europe and Asia. Hybridization is not rare in the Cyprinidae, including this genus. '' S. alburnoides'' is known to be of ancient hybrid origin, with the paternal lineage deriving from a prehistoric species related to ''Anaecypris''; the latter mated with ancestral '' S. pyrenaicus''. Present-day ''S. alburnoides'' mates with sympatric congeners of other species.Collares-Pereira, M.J. & Coelho, M.M. (2010)Reconfirming the hybrid origin and generic status of the Iberian cyprinid complex ''Squalius alburnoides''.''Journal of Fish Biology, 76 (3): 707–715.'' Species There are currently 52 recognized species in this genus: * ''Squalius adanaensis'' Turan, Kottelat & Doğan, 2013 (Adana chub) Turan, D., Kottelat, M. & Doğan, E. (2013)Two new species of ''Squalius'', ''S. adanaensis'' and ''S. seyhanensis'' (Teleostei: Cyprinidae), from the Seyhan River in Turkey.''Zootaxa, 3637 (3): 308–324.'' * ''Squalius agdamicu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glochidia
The glochidium (plural glochidia) is a microscopic larval stage of some freshwater mussels, aquatic bivalve mollusks in the families Unionidae and Margaritiferidae, the river mussels and European freshwater pearl mussels. These larvae are tiny and are typically between 100 and 200 micrometers, or approximately a third of the size of a grain of salt. They can be round or have hooks, attaching to the gills, fins and scales of fish (for example to the gills of a fish host species) for a period before it detaches and falls to the substrate and takes on the typical form of a juvenile mussel. Since a fish is active and free-swimming, this process helps distribute the mussel species to potential areas of habitat that it could not reach any other way. Before the origin of this larval form was understood, it was described as "parasitic worms" on the fish host, although under normal circumstances, glochidia do not harm fish. Overexposure or heavy infections of glochidia may however ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lagunas De Ruidera
The Lagunas de Ruidera are a group of small lakes in the Campo de Montiel, Castilla-La Mancha, between Albacete Province, and Ciudad Real Province, Spain. Most of the lakes are interconnected and their total water amount may reach 23.06 hm3, which is considerable by the standards of other lakes in the Iberian Peninsula. The largest lakes are Laguna Colgada and Laguna del Rey. The area near the lakes is a tourist site, with small hotels, restaurants, camping sites and private villas, located mostly in or around Ruidera town. The area can be reached from Ossa de Montiel or Villahermosa. List of lakes There are now 15 small lakes in the group: Albacete Province * Laguna Colgada * Laguna Batana * Laguna Santos Morcillo * Laguna Salvadora * Laguna Lengua * Laguna Redondilla * Laguna de San Pedro * Laguna Tinaja * Laguna Tomilla * Laguna Conceja * Laguna Taza. This lake was drained in order to build a camping site Ciudad Real Province *Laguna Cenagosa *Laguna Coladilla *Laguna ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sado River
The river Sado () is a river in southern Portugal; it is one of the major rivers in the country. It flows in a northerly direction (the only major Portuguese river to do so) through from its springs in the hills of Ourique before entering the Atlantic Ocean in an estuary in the city of Setúbal. The estuary is the habitat of a large community of bottlenose dolphins; there are 31 members of the pod, each of whom has been named (2007). The river is dammed in several places, chiefly for irrigation of rice, maize, and other vegetables. In its course, the river crosses the city of Alcácer do Sal Alcácer do Sal () is a municipality in Portugal, located in Setúbal District. The population in 2011 was 13,046, in an area of 1499.87 km2. History Earliest settlement There has been human settlement in the area for more than 40,000 ye .... References Rivers of Portugal {{Portugal-river-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mira River (Portugal)
The Mira River () is a Portuguese river in southwestern Alentejo. It is long. It has its sources on the northern slopes of the Serra do Caldeirão and pursues a southeast–northwest course with a generally mild inclination to the Atlantic Ocean, where it discharges through a small calm delta near the town of Vila Nova de Milfontes, south of Lisbon. It is one of the two only rivers in Portugal with a chiefly south–north orientation (the other being its neighbour Sado) and one of the few rivers in Europe with this orientation. Mira basin borders Sado River basin at north and Guadiana River basin eastwards. Main tributaries in the right bank: Torgal Rivulet, Luzianes River and Perna Seca River. Main tributaries in the left bank include rivers Macheira, Guilherme and Telhares. Distributary streamlines run perpendicularly along the coastline and discharge directly to the Atlantic Ocean. Since its name origins are prior to Roman dominion in the zone, it is believed, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Guadiana
The Guadiana River (, also , , ), or Odiana, is an international river defining a long stretch of the Portugal-Spain border, separating Extremadura and Andalusia (Spain) from Alentejo and Algarve (Portugal). The river's basin extends from the eastern portion of Extremadura to the southern provinces of the Algarve; the river and its tributaries flow from east to west, then south through Portugal to the border towns of Vila Real de Santo António (Portugal) and Ayamonte (Spain), where it flows into the Gulf of Cádiz. With a course that covers a distance of , it is the fourth-longest in the Iberian peninsula, and its hydrological basin extends over an area of approximately (the majority of which lies within Spain). Etymology The Romans referred to the river as the , the "River of Ducks". During the Moorish occupation and settlement, the name was extended and referred to as ''Wadi Ana'' (''wādī'' being the Arab term for "river"), later passed on to Portuguese and Spanish settle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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