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Pigo
The pigoKottelat, M. and J. Freyhof, 2007. Handbook of European freshwater fishes. Publications Kottelat, Cornol, Switzerland. 646 p. (''Rutilus pigus''), or Italian roach, is a species of freshwater ray-finned fish belonging to the family Leuciscidae, which includes the daces, Eurasian minnows and related fishes. This species is found in northern Italy and southern Switzerland. Taxonomy The pigo was first formally described as ''Cyprinus pigus'' in 1803 by the French naturalist Bernard Germain de Lacépède with its type locality given as Lake Como, Lake Maggiore and other lakes of Italy. This species is now classified within the genus ''Rutilus'' in the subfamily Leuciscinae of the family Leuciscidae. This species was previously considered to be the same species as the cactus roach (''Rutilus virgo''), of the Danube River system. However, molecular analyses published since the late 2000s have shown that these are two separate valid species. Etymology The pigo belongs to the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cactus Roach
The cactus roach (''Rutilus virgo'') is a species of freshwater ray-finned fish belonging to the family Leuciscidae, which includes the daces, Eurasian minnows and related fishes. This species occurs in central and eastern Europe, including the northern Balkans. Taxonomy The cactus roach was first formally described as ''Leuciscus virgo'' in 1852 by the Austrian zoologist Johann Jakob Heckel with its type locality given as the Danube River near Vienna in Austria. This species is now classified within the genus ''Rutilus'' in the subfamily Leuciscinae of the family Leuciscidae. This species and the pigo or Italian roach (''R. pigus''), of the northern Adriatic basin, were previously considered to be the same species. However, molecular analyses published since the late 2000s have shown that these are two separate valid species. Etymology The cactus roach belongs to the genus ''Rutilus'', a name which means "red, golden red and reddish yellow" and is an allusion to the red colour ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Lugano
Lake Lugano ( or , from ; ) is a glacial lake which is situated on the border between southern Switzerland and northern Italy. The lake, named after the city of Lugano, is situated between Lake Como and Lago Maggiore. It was cited for the first time by Gregory of Tours in 590 with the name ''Ceresio'', a name which is said to have derived from the Latin word ''cerasus'', meaning cherry, and refers to the abundance of cherry trees which at one time adorned the shores of the lake. The lake appears in documents in 804 under the name ''Laco Luanasco''. There are various mountains and tourist destinations on the shores of the lake including Monte Brè to the east, Monte San Salvatore west of Lugano, and Monte Generoso on the south-eastern shore. The World Heritage Site Monte San Giorgio is situated south of the lake. Also located to the south is the Cinque Vette Park. The lake is drained by the Tresa, which empties into Lake Maggiore, the latter being drained by the Ticino and th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bernard Germain De Lacépède
Bernard-Germain-Étienne de La Ville-sur-Illon, comte de Lacépède or La Cépède (; 26 December 17566 October 1825) was a French natural history, naturalist and an active freemason. He is known for his contribution to the Comte de Buffon's great work, the ''Histoire Naturelle''. Biography Lacépède was born at Agen in Guienne. His education was carefully conducted by his father, and the early perusal of Georges-Louis Leclerc, Comte de Buffon, Buffon's Natural History (''Histoire naturelle, Histoire naturelle, générale et particulière'') awakened his interest in that branch of study, which absorbed his chief attention. His leisure he devoted to music, in which, besides becoming a good performer on the piano and organ, he acquired considerable mastery of composition, two of his operas (which were never published) meeting with the high approval of Christoph Willibald Gluck, Gluck; in 1781–1785 he also brought out in two volumes his ''Poétique de la musique''. Meantime h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Specific Name (zoology)
In zoological nomenclature, the specific name (also specific epithet, species epithet, or epitheton) is the second part (the second name) within the scientific name of a species (a binomen). The first part of the name of a species is the name of the genus or the generic name. The rules and regulations governing the giving of a new species name are explained in the article species description. For example, the scientific name for humans is ''Homo sapiens'', which is the species name, consisting of two names: ''Homo'' is the " generic name" (the name of the genus) and ''sapiens'' is the "specific name". Etymology Historically, ''specific name'' referred to the combination of what are now called the generic and specific names. Carl Linnaeus, who formalized binomial nomenclature, made explicit distinctions between specific, generic, and trivial names. The generic name was that of the genus, the first in the binomial, the trivial name was the second name in the binomial, and the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Garda
Lake Garda (, , or , ; ; ) is the largest lake in Italy. It is a popular holiday location in northern Italy, between Brescia and Milan to the west, and Verona and Venice to the east. The lake cuts into the edge of the Eastern Alps, Italian Alps, particularly the Alpine List of mountain groups in the Alpine Club classification of the Eastern Alps, sub-ranges of the Garda Mountains and the Brenta group, Brenta Group. Glaciers formed this alpine region at the end of the Last Glacial Period, last ice age. The lake and its shoreline are divided between the provinces of Province of Brescia, Brescia (to the south-west), Province of Verona, Verona (south-east) and Trentino (north). Etymology In Roman times the lake was known as ''Benacus'' and by some it was revered as god Benacus, the personification of the lake, sometimes associated with the cult of Neptune (mythology), Neptune. Today it is better known as Lake Garda, a toponym of Germanic origin attested since the Middle Ages and de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Livenza
The Livenza (; ; ) is a river in the Italian provinces of Pordenone, Treviso and 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 flows near La Salute di Livenza and finally enters the Adriatic Sea The Adriatic Sea () is a body of water separating the Italian Peninsula from the Balkans, Balkan Peninsula. The Adriatic is the northernmost arm of the Mediterranean Sea, extending from the Strait of Otranto (where it connects to the Ionian Se ... 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Po (river)
The Po ( , ) is the longest river in Italy. It flows eastward across northern Italy, starting from the Cottian Alps. The river's length is , or if the Maira (river), Maira, a right bank tributary, is included. The headwaters of the Po are formed by a Spring (hydrology), 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. Draining a basin of , the Po is characterized by its large Discharge (hydrology), discharge (several List of rivers by length, 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 Levee, embankments. The river flows throu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Standard Length
Fish measurement is the measuring of individual fish and various parts of fish anatomy, their anatomies, for data used in many areas of ichthyology, including Taxonomy (biology), taxonomy and fishery biology. Overall length Standard length (SL) is the length of a fish measured from the tip of the snout to the posterior end of the last vertebra or to the posterior end of the midlateral portion of the Glossary of ichthyology#H, hypural plate. This measurement excludes the length of the caudal fin, caudal (tail) fin. Total length (TL) is the length of a fish measured from the tip of the snout to the tip of the longer lobe of the caudal fin, usually measured with the lobes compressed along the midline. It is a straight-line measure, not measured over the curve of the body. Standard length measurements are used with Teleostei (most Actinopterygii, bony fish), while total length measurements are used with Myxini (hagfish), Petromyzontiformes (lampreys) and usually Elasmobranchii (shark ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iris (anatomy)
The iris (: irides or irises) is a thin, annular structure in the eye in most mammals and birds that is responsible for controlling the diameter and size of the pupil, and thus the amount of light reaching the retina. In optical terms, the pupil is the eye's aperture, while the iris is the diaphragm (optics), diaphragm. Eye color is defined by the iris. Etymology The word "iris" is derived from the Greek word for "rainbow", also Iris (mythology), its goddess plus messenger of the gods in the ''Iliad'', because of the many eye color, colours of this eye part. Structure The iris consists of two layers: the front pigmented Wikt:fibrovascular, fibrovascular layer known as a stroma of iris, stroma and, behind the stroma, pigmented epithelial cells. The stroma is connected to a sphincter muscle (sphincter pupillae), which contracts the pupil in a circular motion, and a set of dilator muscles (dilator pupillae), which pull the iris radially to enlarge the pupil, pulling it in folds. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anal Fin
Fins are moving appendages protruding from the body of fish that interact with water to generate thrust and help the fish swim. Apart from the tail or caudal fin, fish fins have no direct connection with the back bone and are supported only by muscles. Fish fins are distinctive anatomical features with varying structures among different clades: in ray-finned fish (Actinopterygii), fins are mainly composed of bony spines or rays covered by a thin stretch of scaleless skin; in lobe-finned fish ( Sarcopterygii) such as coelacanths and lungfish, fins are short rays based around a muscular central bud supported by jointed bones; in cartilaginous fish ( Chondrichthyes) and jawless fish ( Agnatha), fins are fleshy " flippers" supported by a cartilaginous skeleton. Fins at different locations of the fish body serve different purposes, and are divided into two groups: the midsagittal ''unpaired fins'' and the more laterally located ''paired fins''. Unpaired fins are pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dorsal Fin
A dorsal fin is a fin on the back of most marine and freshwater vertebrates. Dorsal fins have evolved independently several times through convergent evolution adapting to marine environments, so the fins are not all homologous. They are found in most fish, in mammals such as whales, and in extinct ancient marine reptiles such as ichthyosaurs. Most have only one dorsal fin, but some have two or three. Wildlife biologists often use the distinctive nicks and wear patterns which develop on the dorsal fins of whales to identify individuals in the field. The bones or cartilages that support the dorsal fin in fish are called pterygiophores. Functions The main purpose of the dorsal fin is usually to stabilize the animal against rolling and to assist in sudden turns. Some species have further adapted their dorsal fins to other uses. The sunfish uses the dorsal fin (and the anal fin Fins are moving appendages protruding from the body of fish that interact with water to ge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lateral Line
The lateral line, also called the lateral line organ (LLO), is a system of sensory organs found in fish, used to detect movement, vibration, and pressure gradients in the surrounding water. The sensory ability is achieved via modified epithelial cells, known as hair cells, which respond to displacement caused by motion and transduce these signals into electrical impulses via excitatory synapses. Lateral lines play an important role in schooling behavior, predation, and orientation. Early in the evolution of fish, some of the sensory organs of the lateral line were modified to function as the electroreceptors called ampullae of Lorenzini. The lateral line system is ancient and basal to the vertebrate clade, as it is found in fishes that diverged over 400 million years ago. Function The lateral line system allows the detection of movement, vibration, and pressure gradients in the water surrounding an animal. It plays an essential role in orientation, predation, and fish ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
