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Potamotrygon Limai
''Potamotrygon limai'' is a type of tropical freshwater stingray found exclusively in the state of Rondônia, Brazil. This species is prone to local deforestation activities instead of fishing. Description This species can be distinguished from its congeners through several characteristics, such as darker brownish dorsal disc covered with beige to whitish, small spots arranged into concentric patterns, possibility of whitish spots forming vermicular patterns, simpler rostral dermal denticles, and absence of any form of discrete dorsal ocelli. The largest male specimen ever caught is around 65 cm disc width. Habitat & distribution This tropical ray has been recorded only from Jamari River, a part of Madeira River The Madeira River ( ) is a major waterway in South America. It is estimated to be in length, while the Madeira-Mamoré is estimated near or in length depending on the measuring party and their methods. The Madeira is the biggest tributary of ... system in north ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rondônia
Rondônia () is one of the 26 states of Brazil, located in the northern subdivision of the country (central-western part). It is bordered by Acre (state), Acre in the west, Amazonas, Brazil, Amazonas in the north, Mato Grosso in the east, and Bolivia in the south. Rondônia has a population of 1,815,000 as of 2021. It is the fifth least populated state. Its capital and largest city is Porto Velho, bathed by the Madeira River. The state was named after Cândido Rondon, who explored the north of the country during the 1910s. The state, which is home to c. 0.7% of the Brazilian population, is responsible for c. 0.3% of the Brazilian GDP. The state has 52 municipalities and occupies an area of 237,590.547 Square kilometre, km2, equivalent to the territory of Romania and almost five times larger than Croatia. In addition to this, there are other important cities such as Ariquemes, Cacoal, Guajará-Mirim, Ji-Paraná, Rolim de Moura and Vilhena. Geography Rondonia used to be home to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jamari River
The Jamari River is a river of Rondônia state in western Brazil. Part of the river's watershed is covered by the Jacundá National Forest, a sustainable use conservation unit. The Jamari river is dammed by the Samuel Hydroelectric Dam near Porto Velho Porto Velho (, ''Old Port'') is the capital (political), capital of the Brazilian States of Brazil, state of Rondônia, in the upper Amazon River basin. The population is 460,434 people (as of the Brazilian Institute of Geography and Statistics, ..., which forms a reservoir that covers . The Samuel Ecological Station was established in compensation for the environmental impact. The ecological station extends to the east of the dam and protects part of the Jamari river basin. See also * List of rivers of Rondônia ReferencesBrazilian Ministry of Transport Rivers of Rondônia {{Rondônia-river-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Madeira River
The Madeira River ( ) is a major waterway in South America. It is estimated to be in length, while the Madeira-Mamoré is estimated near or in length depending on the measuring party and their methods. The Madeira is the biggest tributary of the Amazon, accounting for about 15% of the water in the basin. A map from Emanuel Bowen in 1747, held by the David Rumsey Map Collection, refers to the Madeira by the pre-colonial, indigenous name Cuyari. The River of Cuyari, called by the Portuguese Madeira or the Wood River, is formed by two great rivers, which join near its mouth. It was by this River, that the Nation of Topinambes passed into the River Amazon. Climate The mean inter-annual precipitations on the great basins vary from , the entire upper Madeira basin receiving . The greatest extremes of rainfall are between . Even just below the confluence that forms it, the Madeira is one of the largest rivers by discharge of the world, with a mean inter-annual discharge of , i.e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endemic Fauna Of Brazil
Endemism is the state of a species being found only 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 also be referred to as an ''endemism'' or, in scientific literature, as an ''endemite''. Similarly, many species found in the Western ghats of India are examples of endemism. Endemism is an important concept in conservation biology for measuring biodiversity in a particular place and evaluating the risk of extinction for species. Endemism is also of interest in evolutionary biology, because it provides clues about how changes in the environment cause species to undergo range shifts (potentially expanding their range into a larger area or becoming ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Freshwater Stingrays Of Brazil
Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids. The term excludes seawater and brackish water, but it does include non-salty mineral-rich waters, such as chalybeate springs. Fresh water may encompass frozen and meltwater in ice sheets, ice caps, glaciers, snowfields and icebergs, natural precipitations such as rainfall, snowfall, hail/ sleet and graupel, and surface runoffs that form inland bodies of water such as wetlands, ponds, lakes, rivers, streams, as well as groundwater contained in aquifers, subterranean rivers and lakes. Water is critical to the survival of all living organisms. Many organisms can thrive on salt water, but the great majority of vascular plants and most insects, amphibians, reptiles, mammals and birds need fresh water to survive. Fresh water is the water resource that is of the most and immediate use to humans. Fresh water is not always pot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
