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Melanotaenia Splendida
''Melanotaenia splendida'', the Eastern rainbowfish, is a species of rainbowfish from the subfamily Melanotaeniinae which is found in Australia. Taxonomy ''Melanotaenia splendida'' is highly variable and although three subspecies have been recognised these have been found to show a wide variety of morphology within each subspecies. These differences are obvious in colouration and in the depth of the body. The three commonly recognised subspecies are: * ''Melanotaenia splendida inornata'' (Castelnau 1875) - chequered rainbowfish * '' Melanotaenia splendida splendida'' (Peters 1866) - eastern rainbowfish * ''Melanotaenia splendida tatei'' (Zietz 1896) - desert rainbowfish Distribution The chequered rainbowfish is found in northern Australia from the Mary River east to the Cape York Peninsula and south to the Jardine River, it is also found on some of the Torres Strait Islands. The eastern rainbowfish occurs in rivers east of the Great Dividing Range from the Torres Strait Islan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wilhelm Peters
Wilhelm Karl Hartwich (or Hartwig) Peters (22 April 1815 in Koldenbüttel – 20 April 1883) was a German natural history, naturalist and explorer. He was assistant to the anatomist Johannes Peter Müller and later became curator of the Natural History Museum, Berlin, Berlin Zoological Museum. Encouraged by Müller and the explorer Alexander von Humboldt, Peters travelled to Mozambique via Angola in September 1842, exploring the coastal region and the Zambesi River. He returned to Berlin with an enormous collection of natural history specimens, which he then described in ''Naturwissenschaftliche Reise nach Mossambique... in den Jahren 1842 bis 1848 ausgeführt'' (1852–1882). The work was comprehensive in its coverage, dealing with mammals, birds, reptiles, amphibians, river fish, insects and botany. He replaced Martin Lichtenstein as curator of the museum in 1858, and in the same year he was elected a foreign member of the Royal Swedish Academy of Sciences. In a few years, he g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Torres Strait Islands
The Torres Strait Islands are a group of at least 274 small islands in the Torres Strait, a waterway separating far northern continental Australia's Cape York Peninsula and the island of New Guinea. They span an area of , but their total land area is . The Islands have been inhabited by the indigenous Torres Strait Islanders. Lieutenant James Cook first claimed British sovereignty over the eastern part of Australia at Possession Island, Queensland, Possession Island in 1770, but British administrative control only began in the Torres Strait Islands in 1862. The islands are now mostly part of Queensland, a constituent State of the Australia, Commonwealth of Australia, but are administered by the Torres Strait Regional Authority, a statutory authority of the Australian federal government. A few islands very close to the coast of mainland New Guinea belong to the Western Province (Papua New Guinea), Western Province of Papua New Guinea, most importantly Daru Island with the provin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Melanotaenia
''Melanotaenia'' is a genus of rainbowfish from Australia, Indonesia (West Papua), New Guinea, and nearby smaller islands. Species There are currently 86 recognized species in this genus: * '' Melanotaenia affinis'' ( M. C. W. Weber, 1908) (New Guinea rainbowfish) * '' Melanotaenia ajamaruensis'' G. R. Allen & N. J. Cross, 1980 (Ajamaru rainbowfish) * '' Melanotaenia albimarginata'' G. R. Allen, Hadiaty, Unmack & Erdmann, 2015 (White-tip rainbowfish) Allen, G.R., Hadiaty, R.K., Unmack, P.J. & Erdmann, M.V. (2015): Rainbowfishes (''Melanotaenia'': Melanotaeniidae) of the Aru Islands, Indonesia with descriptions of five new species and redescription of ''M. patoti'' Weber and ''M. senckenbergianus'' Weber. ''aqua, International Journal of Ichthyology, 21 (2): 66-108.'' * '' Melanotaenia ammeri'' G. R. Allen, Unmack & Hadiaty, 2008 (Ammer's rainbowfish) * '' Melanotaenia angfa'' G. R. Allen, 1990 (Yakati rainbowfish) * '' Melanotaenia arfakensis'' G. R. Allen, 1990 (Arfak ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pectoral Fin
Fins are distinctive anatomical features composed of bony spines or rays protruding from the body of a fish. They are covered with skin and joined together either in a webbed fashion, as seen in most bony fish, or similar to a flipper, as seen in sharks. Apart from the tail or caudal fin, fish fins have no direct connection with the spine and are supported only by muscles. Their principal function is to help the fish swim. Fins located in different places on the fish serve different purposes such as moving forward, turning, keeping an upright position or stopping. Most fish use fins when swimming, flying fish use pectoral fins for gliding, and frogfish use them for crawling. Fins can also be used for other purposes; male sharks and mosquitofish use a modified fin to deliver sperm, thresher sharks use their caudal fin to stun prey, reef stonefish have spines in their dorsal fins that inject venom, anglerfish use the first spine of their dorsal fin like a fishing rod ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spawn (biology)
Spawn is the Egg cell, eggs and Spermatozoa, sperm released or deposited into water by aquatic animals. As a verb, ''to spawn'' refers to the process of releasing the eggs and sperm, and the act of both sexes is called spawning. Most aquatic animals, except for aquatic mammals and marine reptile, reptiles, reproduce through the process of spawning. Spawn consists of the reproductive cells (gametes) of many aquatic animals, some of which will become fertilized and produce offspring. The process of spawning typically involves females releasing Ovum, ova (unfertilized eggs) into the water, often in large quantities, while males simultaneously or sequentially release spermatozoa (milt) to fertilize the eggs. Most fish reproduce by spawning, as do most other aquatic animals, including crustaceans such as crabs and shrimps, molluscs such as oysters and squid, echinoderms such as sea urchins and sea cucumbers, amphibians such as frogs and newts, aquatic insects such as mayflies and mos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sexual Dimorphism
Sexual dimorphism is the condition where the sexes of the same animal and/or plant species exhibit different morphological characteristics, particularly characteristics not directly involved in reproduction. The condition occurs in most animals and some plants. Differences may include secondary sex characteristics, size, weight, colour, markings, or behavioural or cognitive traits. These differences may be subtle or exaggerated and may be subjected to sexual selection and natural selection. The opposite of dimorphism is ''monomorphism'', which is when both biological sexes are phenotypically indistinguishable from each other. Overview Ornamentation and coloration Common and easily identified types of dimorphism consist of ornamentation and coloration, though not always apparent. A difference in coloration of sexes within a given species is called sexual dichromatism, which is commonly seen in many species of birds and reptiles. Sexual selection leads to the exaggerated dim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Eyre
Lake Eyre ( ), officially known as Kati Thanda–Lake Eyre, is an endorheic lake in east-central Far North South Australia, some north of Adelaide. The shallow lake is the depocentre of the vast endorheic Lake Eyre basin, and contains the lowest natural point in Australia at approximately below sea level ( AHD), and on the rare occasions that it fills completely, is the largest lake in Australia covering an area up to . When the lake is full, it has the same salinity level as seawater, but becomes hypersaline as the lake dries up and the water evaporates. The lake was named in honour of Edward John Eyre, the first European to see it in 1840. The lake's official name was changed in December 2012 to combine the name "Lake Eyre" with the Aboriginal name, Kati Thanda. The native title over the lake and surrounding region is held by the Arabana people. Geography Kati Thanda–Lake Eyre is in the deserts of central Australia, in northern South Australia. The Lake Eyre Ba ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Drainage Basin
A drainage basin is an area of land where all flowing surface water converges to a single point, such as a river mouth, or flows into another body of water, such as a lake or ocean. A basin is separated from adjacent basins by a perimeter, the '' drainage divide'', made up of a succession of elevated features, such as ridges and hills. A basin may consist of smaller basins that merge at river confluences, forming a hierarchical pattern. Other terms for a drainage basin are catchment area, catchment basin, drainage area, river basin, water basin, and impluvium. In North America, they are commonly called a watershed, though in other English-speaking places, "watershed" is used only in its original sense, that of a drainage divide. In a closed drainage basin, or endorheic basin, the water converges to a single point inside the basin, known as a sink, which may be a permanent lake, a dry lake, or a point where surface water is lost underground. Drainage basins are similar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endemism
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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dawson River (Queensland)
The Dawson River is a river located in Central Queensland, Australia. Course and features The Dawson River rises in the Carnarvon Range, draining through the Carnarvon National Park, northwest of the settlement of Upper Dawson. The flows generally south by east, crossed by the Carnarvon Highway and then flows generally east through the settlement of where the river is crossed by the Leichhardt Highway. The river then flows in a northerly direction through the settlement of where the river is again crossed by the Leichhardt Highway. The river flows north through the settlement of and towards , crossed by the Capricorn Highway. A little further north, the Dawson River forms confluence with the Mackenzie River to form the Fitzroy River. From source to mouth, the river is joined by sixty-four tributaries, including the Don River, and descends over its course. Several weirs have been constructed along the river to provide water for cotton and dairy farming in the region. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Great Dividing Range
The Great Dividing Range, also known as the East Australian Cordillera or the Eastern Highlands, is a cordillera system in eastern Australia consisting of an expansive collection of mountain ranges, plateaus and rolling hills, that runs roughly parallel to the east coast of Australia and forms the fifth-longest land-based mountain chain in the world, and the longest entirely within a single country. It is mainland Australia's most substantial topographic feature and serves as the definitive watershed for the river systems in eastern Australia, hence the name. The Great Dividing Range stretches more than from Dauan Island in the Torres Strait off the northern tip of Cape York Peninsula, running the entire length of the eastern coastline through Queensland and New South Wales, then turning west across Victoria before finally fading into the Wimmera plains as rolling hills west of the Grampians region. The width of the Range varies from about to over .Shaw, John H., ''Col ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jardine River
The Jardine River is the largest river of the Cape York Peninsula in Far North Queensland, Australia. Course The headwaters of the river rise southwest of Helby Hill in the Great Dividing Range and flow in a north westerly direction parallel to the McHenry River through the Apudthama National Park. The McHenry eventually discharges into the Jardine which continues north west combining with multiple other tributaries as it flows into the flatlands of the Jardine Swamps. It eventually discharges into Endeavour Strait near Van Spoult Head opposite Prince of Wales Island and into the northern waters of the Gulf of Carpentaria, part of the Coral Sea. Unlike other tropical rivers in Northern Australia, the Jardine flows all year round as the catchment receives sufficient rainfall throughout the year for it to do so. The river catchment occupies an area of of mostly uninhabited country, some of the catchment is made up of mostly freshwater wetlands. The river has a mean annual ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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