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Río Lerma
The Lerma River ( es, Río Lerma) is Mexico's second longest river. It is a river in west-central Mexico that begins in Mexican Plateau at an altitude over above sea level, and ends where it empties into Lake Chapala, Mexico's largest lake, near Guadalajara, Jalisco. Lake Chapala is the starting point of Río Grande de Santiago, which some treat as a continuation of the Lerma River. In combination, the two are often called the Lerma Santiago River ( es, Río Lerma Santiago). The Lerma River is notorious for its pollution, but the water quality has demonstrated considerable improvement in recent years due mostly to government environmental programs and through massive upgrading projects of sanitation works. Course The Lerma River originates from the Lerma lagoons near Almoloya del Río, on a plateau more than above sea level, and southeast of Toluca. The lagoons receive their water from springs rising from basaltic volcanics that flow down from Monte de Las Cruces. These are l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Almoloya Del Río
Almolya del Río is a town and municipality located in the State of Mexico 26 km from the state capital of Toluca. It is located 2,600 meters above sea level. The name Almoloya comes from the Nahuatl phrase ''almoloyán'' which means place where water flows out. "del Rio" means "of the river" in Spanish and refers to the Lerma River, which originates here. The town History While the area had been long inhabited by hunter-gatherers, the first sedentary farming communities appeared in this area around 5000 to 1000 BC. Almoloya was founded on the edges of the marshes of Lake Chicnahuapan. In the Pre-Classic period, agriculture intensified and tribal communities began to develop. By the High Classic period, villages with ceremonial centers had developed as well as the cultivation of corn, beans and vegetables on chinampas in Lake Chicnahuapan and the Chicnahuapan River, now known as the Lerma River. The village of Almoloya was founded between 650 and 850 AD by the Otomí ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Introduced Species
An introduced species, alien species, exotic species, adventive species, immigrant species, foreign species, non-indigenous species, or non-native species is a species living outside its native distributional range, but which has arrived there by human activity, directly or indirectly, and either deliberately or accidentally. Non-native species can have various effects on the local ecosystem. Introduced species that become established and spread beyond the place of introduction are considered naturalized. The process of human-caused introduction is distinguished from biological colonization, in which species spread to new areas through "natural" (non-human) means such as storms and rafting. The Latin expression neobiota captures the characteristic that these species are ''new'' biota to their environment in terms of established biological network (e.g. food web) relationships. Neobiota can further be divided into neozoa (also: neozoons, sing. neozoon, i.e. animals) and n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Threatened Species
Threatened species are any species (including animals, plants and fungi) which are vulnerable to endangerment in the near future. Species that are threatened are sometimes characterised by the population dynamics measure of ''critical depensation'', a mathematical measure of biomass related to population growth rate. This quantitative metric is one method of evaluating the degree of endangerment. IUCN definition The International Union for Conservation of Nature (IUCN) is the foremost authority on threatened species, and treats threatened species not as a single category, but as a group of three categories, depending on the degree to which they are threatened: *Vulnerable species * Endangered species * Critically endangered species Less-than-threatened categories are near threatened, least concern, and the no longer assigned category of conservation dependent. Species which have not been evaluated (NE), or do not have sufficient data ( data deficient) also are not conside ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tetrapleurodon
''Tetrapleurodon'' is a genus of lampreys that are endemic to the Lerma–Chapala basin in west–central Mexico. Both species are threatened. Species There are two recognized species in this genus according to FishBase. They are sometimes included in the genus '' Lampetra'' instead. * ''Tetrapleurodon geminis'' Álvarez, 1964 (Mexican brook lamprey) * ''Tetrapleurodon spadiceus ''Tetrapleurodon'' is a genus of lampreys that are endemic to the Lerma– Chapala basin in west–central Mexico. Both species are threatened. Species There are two recognized species in this genus according to FishBase. They are sometimes in ...'' ( T. H. Bean, 1887) (Mexican lamprey) References Petromyzontidae Fish of North America Jawless fish genera {{jawless-fish-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ictalurus
''Ictalurus'' is a genus of North American freshwater catfishes. It includes the well-known channel catfish (''Ictalurus punctatus'') and blue catfish (''Ictalurus furcatus''). The catfish genome database (cBARBEL) is a database for the genetics of ''Ictalurus'' species. Species Currently, 10 species in this genus are recognized: * '' Ictalurus australis'' ( Meek, 1904) (Panuco catfish) * '' Ictalurus balsanus'' ( D. S. Jordan & Snyder, 1899) (Balsas catfish) * '' Ictalurus dugesii'' ( T. H. Bean, 1880) (Lerma catfish) * '' Ictalurus furcatus'' (Valenciennes, 1840) (blue catfish) * '' Ictalurus lupus'' ( Girard, 1858) (headwater catfish) * '' Ictalurus meridionalis'' ( Günther, 1864) * ''Ictalurus mexicanus'' ( Meek, 1904) (Rio Verde catfish) * ''Ictalurus ochoterenai'' ( F. de Buen, 1946) (Chapala catfish) * ''Ictalurus pricei'' ( Rutter, 1896) (Yaqui catfish) * ''Ictalurus punctatus'' ( Rafinesque, 1818) (channel catfish) Four fossil species also are assigned to this genus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Notropis ''Notropis'' is a genus of freshwater fish in the family Cyprinidae. They are known commonly as eastern shiners. Système canadien d’information sur la biodiversité (SCIB) They are native to North America, and are the continent's second largest genus.McAllister, C.T., Layher, W.G., Robison, H.W. & Buchanan, T.M. (2009) New Distribution Records for Three Species of ''Notropis'' (Cypriniformes: Cyprinidae) from Large Rivers |
