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Adriatic Sturgeon
The Adriatic sturgeon (''Acipenser naccarii'') is a species of fish in the family Acipenseridae. It is native to the Adriatic Sea and large rivers which flow in it of Albania, Greece, Italy, Montenegro, Croatia, Bosnia and Herzegovina and Slovenia. Specimens can be seen in several public aquarium, such the Milan Aquarium, Aquarium Finisterrae, Aquarium of the Po, and Oasis of Sant'Alessio in Lombardy. Description The Adriatic sturgeon reaches a maximum length exceeding ; the published maximum weight was 25 kg (55 lb), but large wild fish recently caught were evidently exceeding . Like other sturgeons it has an elongated body, heterocercal tail, partially cartilaginous skeleton, naked skin and longitudinal series of bony scutes on the body. The rostrum is tendentially conical and rather short (1/3 of the head), the head is broad and rounded at the apex, with a protractile mouth which lower lip is thin with a central cleft, and four barbels (circular section) which a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sea Lamprey
The sea lamprey (''Petromyzon marinus'') is a parasitic lamprey native to the Northern Hemisphere. It is sometimes referred to as the "vampire fish". Description The sea lamprey has an eel-like body without paired fins. Its mouth is jawless, round and sucker-like, and as wide or wider than the head; sharp teeth are arranged in many concentric circular rows. There are seven branchial or gill-like openings behind the eye. Sea lampreys are olive or brown-yellow on the dorsal and lateral part of the body, with some black marblings, with lighter coloration on the belly. Adults can reach a length of up to and a body weight up to . Etymology The etymology of the genus name ''Petromyzon'' is from '' petro-'' "stone" and '' myzon'' "sucking"; ''marinus'' is Latin for "of the sea". Distribution and habitat The species is found in the northern and western Atlantic Ocean along the shores of Europe and North America, in the western Mediterranean Sea, the Black Sea, and as an invasive speci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cartilage
Cartilage is a resilient and smooth type of connective tissue. In tetrapods, it covers and protects the ends of long bones at the joints as articular cartilage, and is a structural component of many body parts including the rib cage, the neck and the bronchial tubes, and the intervertebral discs. In other taxa, such as chondrichthyans, but also in cyclostomes, it may constitute a much greater proportion of the skeleton. It is not as hard and rigid as bone, but it is much stiffer and much less flexible than muscle. The matrix of cartilage is made up of glycosaminoglycans, proteoglycans, collagen fibers and, sometimes, elastin. Because of its rigidity, cartilage often serves the purpose of holding tubes open in the body. Examples include the rings of the trachea, such as the cricoid cartilage and carina. Cartilage is composed of specialized cells called chondrocytes that produce a large amount of collagenous extracellular matrix, abundant ground substance that is rich in pro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Po (river)
The Po ( , ; la, Padus or ; Ancient Ligurian: or ) is the longest river in Italy. It flows eastward across northern Italy starting from the Cottian Alps. The river's length is either or , if the Maira, a right bank tributary, is included. The headwaters of the Po are a spring seeping from a stony hillside at Pian del Re, a flat place at the head of the Val Po under the northwest face of Monviso. The Po then extends along the 45th parallel north before ending at a delta projecting into the Adriatic Sea near Venice. It is characterized by its large discharge (several rivers over 1,000 km have a discharge inferior or equal to the Po). It is, with the Rhône and Nile, one of the three Mediterranean rivers with the largest water discharge. As a result of its characteristics, the river is subject to heavy flooding. Consequently, over half its length is controlled with embankments. The river flows through many important Italian cities, including Turin, Piacenza, Cremona and Ferr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tagliamento
The Tagliamento () is a braided river in north-east Italy, flowing from the Alps to the Adriatic Sea at a point between Trieste and Venice. The Tagliamento river is considered as the last morphologically intact river in the Alps. (Its course has not been altered by human intervention). For this reason, it has been the subject of many scientific investigations into its peculiar characteristics: these include its 150 km long corridor which connects the Alps and the Adriatic Sea, its unconstrained floodplain, which hosts several aquatic and terrestrial habitats, and its over 600 islands. The source is in the Mauria Pass, on the border between the regions of Veneto and Friuli-Venezia Giulia. In the upper section, it flows through the historic Carnia region, in the northern part of the province of Udine. In the middle and lower sections, it first sets the boundary between the provinces of Udine and Pordenone and later between the former and the Province of Venic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Livenza
The Livenza ( la, Liquentia, fur, Livence, vec, Łivensa) is a river in the Italian provinces of Province of Pordenone, Pordenone, Province of Treviso, Treviso and Province of Venice, Venice. Its source is near Polcenigo and Caneva in Pordenone. It flows in a southeasterly direction past Sacile and forms the border between the provinces of Pordenone and Treviso roughly between Brugnera and Motta di Livenza. It continues to flow in a southeasterly direction, forming the border between the provinces of Treviso and Venice before flowing into the province of Venice near Santo Stino di Livenza. It flow near La Salute di Livenza and finally enters the Adriatic Sea near Caorle. References External links Rivers of Italy Rivers of the Province of Pordenone Rivers of the Province of Treviso Rivers of the Metropolitan City of Venice Adriatic Italian coast basins {{Italy-river-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Piave (river)
The Piave ( la, Plavis, German: ''Ploden'') is a river in northern Italy. It begins in the Alps and flows southeast for into the Adriatic Sea near the city of Venice. One of its tributaries is the Boite. In 1809 it was the scene of a battle during the Napoleonic Wars, in which Franco-Italian and Austrian forces clashed. In 1918, during World War I, it was the scene of Battle of the Piave River, the last major Austro-Hungarian attack on the Italian Front, which failed. The Battle of the Piave River was a decisive battle of World War I on the Italian Front. The river is thus called in Italy ''Fiume Sacro alla Patria'' (Sacred River of the Homeland) and is mentioned in the patriotic song "La leggenda del Piave". It was eventually followed by the Battle of Vittorio Veneto later that year. Viticulture North of the city of Venice along the Piave river valley is the ''Denominazione di origine controllata'' (DOC) zone that makes up the Veneto wine region known as the Piave DOC. Her ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bacchiglione
__NOTOC__ The Bacchiglione ( la, Medoacus Minor, "Little Medoacus") is a river that flows in Veneto, northern Italy. It rises in the Alps and empties about later into the Brenta River near Chioggia. It flows through and past a number of cities, including Vicenza and Padua. It acted for many centuries as a significant waterway up to Vicenza, above which it ceases to be navigable. It was connected in the 19th century to the Adige by a canal. Course The river starts in some springs in the towns of Dueville and Villaverla, in the province of Vicenza. Here it is called "Bacchiglioncello". Just upstream of the city of Vicenza receives water from the Leogra Timonchio (which descends from Mount Pasubio). At this junction, the river becomes the Bacchiglione. At Ponte del Bo, above Vicenza, it joins with the Orolo. In Vicenza, the Bacchiglione is joined by the rivers Tesina, Retrone and Astichello. The river is about long and has a basin of . The average flow of the Bacchiglione in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brenta (river)
The Brenta is an Italian river that runs from Trentino to the Adriatic Sea just south of the Venetian lagoon in the Veneto region, in the north-east of Italy. During the Roman era, it was called Medoacus (Ancient Greek: ''Mediochos'', ''Μηδειοχος'') and near Padua it divided in two branches, Medoacus Maior (Greater Medoacus) and Medoacus Minor (Lesser Medoacus). The river changed its course in the early Middle Ages, and its former bed through Padua was occupied by the Bacchiglione. It is long and was first channelled in the 16th century when a long canal was built from the village of Stra to the Adriatic Sea, bypassing the Venetian lagoon. A branch of the Brenta, named '' Naviglio del Brenta'', was left to connect directly Venice and Padua (which was a kind of second capital of the Venice Republic). It runs through Stra, Fiesso d'Artico, Dolo, Mira, Oriago and Malcontenta to Fusina (which is part of the comune of Venice). Starting in the 16th century, many large ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adige
The Adige (; german: Etsch ; vec, Àdexe ; rm, Adisch ; lld, Adesc; la, Athesis; grc, Ἄθεσις, Áthesis, or , ''Átagis'') is the second-longest river in Italy, after the Po. It rises near the Reschen Pass in the Vinschgau in the province of South Tyrol, near the Italian border with Austria and Switzerland, and flows through most of northeastern Italy to the Adriatic Sea. The river's name is Celtic in origin, from the Proto-Celtic cel-x-proto, *yt-ese, label=none, "the water", cognate with the River Tees in England (anciently ''Athesis'', ''Teesa''). Description The river source is near the Reschen Pass () close to the borders with Austria and Switzerland above the Inn valley. It flows through the artificial alpine Lake Reschen. The lake is known for the church tower that marks the site of the former village of Alt Graun ("Old Graun"); it was evacuated and flooded in 1953 after the dam was finished. Near Glurns, the Rom river joins from the Swiss Val Müstair. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acipenser Naccarii Head
''Acipenser'' is a genus of sturgeons. With 17 living species (others are only known from fossil remains), it is the largest genus in the order Acipenseriformes. The genus is paraphyletic, containing all sturgeons that do not belong to ''Huso'', ''Scaphirhynchus,'' or ''Pseudoscaphirhynchus,'' with many species more closely related to the other three genera than they are to other species of ''Acipenser''. They are native to freshwater and estuarine systems of Eurasia and North America, and most species are threatened. Several species also known to enter near-shore marine environments in the Atlantic, Arctic and Pacific oceans. Living species There are 17 living species: *''Acipenser baerii'' J. F. Brandt, 1869 **'' Acipenser baerii baerii'' J. F. Brandt, 1869 (Siberian sturgeon) **'' Acipenser baerii baicalensis'' A. M. Nikolskii, 1896 (Baikal sturgeon) **''Acipenser baerii stenorrhynchus'' A. M. Nikolskii, 1896 *''Acipenser brevirostrum'' Lesueur, 1818 (Shortnose sturgeon) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Operculum (fish)
The operculum is a series of bones found in bony fish and chimaeras that serves as a facial support structure and a protective covering for the gills; it is also used for respiration and feeding. Anatomy The opercular series contains four bone segments known as the preoperculum, suboperculum, interoperculum and operculum. The preoperculum is a crescent-shaped structure that has a series of ridges directed posterodorsally to the organisms canal pores. The preoperculum can be located through an exposed condyle that is present immediately under its ventral margin; it also borders the operculum, suboperculum, and interoperculum posteriorly. The suboperculum is rectangular in shape in most bony fishy and is located ventral to the preoperculum and operculum components. It is the thinnest bone segment out of the opercular series and is located directly above the gills. The interoperculum is triangular shaped and borders the suboperculum posterodorsally and the preoperculum anterodorsa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acipenser Sturio
The European sea sturgeon (''Acipenser sturio''), also known as the Atlantic sturgeon or common sturgeon, is a species of sturgeon native to Europe. It was formerly abundant, being found in coastal habitats all over Europe. It is anadromous and breeds in rivers. It is currently a critically endangered species. Although the name Baltic sturgeon sometimes has been used, it has now been established that sturgeon of the Baltic region are '' A. oxyrinchus'', a species otherwise restricted to the Atlantic coast of North America. Description The wedge-shaped head of the European sea sturgeon ends in a long point. There are many sensitive barbels on the facial area. The dorsal fins are located very far back on the body. Five longitudinal lines of large osseous plates are found on the body of the fish. The stomach is yellow and the back is a brownish grey. This sturgeon can reach and in weight, but a more common length is .They can reach an age of 100 years, and have a late sexu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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