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Craterocephalus Centralis
The Finke River hardyhead (''Craterocephalus centralis'') is a species of fish in the family Atherinidae. It is endemic to the Finke River system in the Northern Territory, where it is widespread in open water or around aquatic vegetation. They occur in a wide range of salinity and pH and in Summer seek refuge in semi-permanent water holes. They are omnivores and feed on small crustaceans, insects, gastropods, polychaete worms, algae and fish eggs. This species shows a wide tolerance to temperature and salinity and is omnivore, probably spawning during warmer months. It was previously mis-identified as ''Craterocephalus eyresii''. References Finke River hardyhead Freshwater fish of the Northern Territory Finke River hardyhead The Finke River hardyhead (''Craterocephalus centralis'') is a species of fish in the family Atherinidae. It is endemic to the Finke River system in the Northern Territory, where it is widespread in open water or around aquatic vegetation. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lucy Elizabeth Lillian Mary Crowley
Lucy is an English feminine given name derived from the Latin masculine given name Lucius with the meaning ''as of light'' (''born at dawn or daylight'', maybe also ''shiny'', or ''of light complexion''). Alternative spellings are Luci, Luce, Lucie, Lucia, and Luzia. The English Lucy surname is taken from the Norman language that was Latin-based and derives from place names in Normandy based on Latin male personal name Lucius. It was transmitted to England after the Norman Conquest in the 11th century (see also De Lucy). Feminine name variants *Luiseach (Irish) *Lusine, Լուսինե, Լուսինէ (Armenian) *Lučija, Лучија ( Serbian) *Lucy, Люси (Bulgarian) *Lutsi, Луци ( Macedonian) *Lutsija, Луција ( Macedonian) *Liùsaidh (Scottish Gaelic) *Liucija ( Lithuanian) *Liucilė ( Lithuanian) *Lūcija, Lūsija ( Latvian) *Lleucu (Welsh) *Llúcia (Catalan) *Loukia, Λουκία (Greek) *Luca ( Hungarian) *Luce (French, Italian) *Lucetta (English) *Lucette ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Walter Ivantsoff
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Fish
Fish are aquatic, craniate, gill-bearing animals that lack limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish as well as various extinct related groups. Approximately 95% of living fish species are ray-finned fish, belonging to the class Actinopterygii, with around 99% of those being teleosts. The earliest organisms that can be classified as fish were soft-bodied chordates that first appeared during the Cambrian period. Although they lacked a true spine, they possessed notochords which allowed them to be more agile than their invertebrate counterparts. Fish would continue to evolve through the Paleozoic era, diversifying into a wide variety of forms. Many fish of the Paleozoic developed external armor that protected them from predators. The first fish with jaws appeared in the Silurian period, after which many (such as sharks) became formidable marine predators rather than just the prey of arthropods. Mos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atherinidae
The Old World silversides are a family, Atherinidae, of fish in the order Atheriniformes. Atherinidae are abundant and considered bony fish (teleost) that are widespread globally, living in rivers, estuaries, and coastal waters. They occur worldwide in tropical and temperate waters. About two-thirds of the species are marine, and the remainder live in fresh water. The 74 species are in 13 genera. The genus ''Craterocephalus'' is the most diverse with 25 species. Four genera are monotypic. Silversides are relatively small with most being less than in length, with several not attaining lengths of more than . The body is generally elongated. Distinctive characters include two dorsal fins widely separated, with the first consisting of flexible spines and the second having one spine followed by soft rays, while the anal fin has one spine on the leading edge followed by soft rays. The pectoral fins tend to be high, and there is no lateral line. On the flanks is a broad, silvery band. ... [...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] |
Finke River
The Finke River, or ''Larapinta'' (Arrernte), is a river in central Australia, one of four main rivers of the Lake Eyre Basin and thought to be the oldest riverbed in the world. It flows for only a few days a year and when this happens, its water usually disappears into the sands of the Simpson Desert, rarely if ever reaching Lake Eyre. Geography The source of the Finke River is in the Northern Territory's MacDonnell Ranges which flows through central Australia, the name Finke River is first applied at the confluence of the Davenport and Ormiston Creeks, just north of Mount Zeil. From here the river meanders for approximately to the western edge of the Simpson Desert in northern South Australia. It flows through the West MacDonnell and Finke Gorge National Parks. Usually the river is a string of waterholes, but it can become a raging torrent during rare flood events. In extreme events, water from the Finke River flows into the Macumba River, which empties into Lake Eyre, a tot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Northern Territory
The Northern Territory (commonly abbreviated as NT; formally the Northern Territory of Australia) is an states and territories of Australia, Australian territory in the central and central northern regions of Australia. The Northern Territory shares its borders with Western Australia to the west (129th meridian east), South Australia to the south (26th parallel south), and Queensland to the east (138th meridian east). To the north, the territory looks out to the Timor Sea, the Arafura Sea and the Gulf of Carpentaria, including Western New Guinea and other islands of the Indonesian archipelago. The NT covers , making it the third-largest Australian federal division, and List of country subdivisions by area, the 11th-largest country subdivision in the world. It is sparsely populated, with a population of only 249,000 – fewer than half as many people as in Tasmania. The largest population center is the capital city of Darwin, Northern Territory, Darwin. The archaeological hist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Omnivores
An omnivore () is an animal that has the ability to eat and survive on both plant and animal matter. Obtaining energy and nutrients from plant and animal matter, omnivores digest carbohydrates, protein, fat, and fiber, and metabolize the nutrients and energy of the sources absorbed. Often, they have the ability to incorporate food sources such as algae, fungi, and bacteria into their diet. Omnivores come from diverse backgrounds that often independently evolved sophisticated consumption capabilities. For instance, dogs evolved from primarily carnivorous organisms (Carnivora) while pigs evolved from primarily herbivorous organisms (Artiodactyla). Despite this, physical characteristics such as tooth morphology may be reliable indicators of diet in mammals, with such morphological adaptation having been observed in bears. The variety of different animals that are classified as omnivores can be placed into further sub-categories depending on their feeding behaviors. Frugivores i ... [...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] |
Craterocephalus Eyresii
''Craterocephalus eyresii'', the Lake Eyre hardyhead, is a species of freshwater silverside from the family Atherinidae which is endemic to the Lake Eyre basin in Australia. Description ''Craterocephalus eyresii'' is a small drab yellowish-grey coloured fish with greenish-silvery underside, and a silver mid-lateral stripe which has some dark melanophores around it., and transparent to yellowish fins. There are two dorsal fins which are widely separated with the first dorsal fin originating before the tips of the ventral fins and the anal fin origin lies directly underneath the origin of second dorsal fin. The caudal fin is forked. The fins are yellowish in colour. It attains a maximum total length of . Distribution ''Craterocephalus eyresii'' is endemic to Lake Eyre and rivers to the south and west of it in South Australia. It also occurs in Lake Frome and its drainage basin in the northern Flinders Ranges as well as Lake Torrens and its tributaries. Habitat and biology ''Cr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Craterocephalus
''Craterocephalus'' is a genus of small and slender brackish or freshwater silversides from Australia and New Guinea. It is the most diverse genus in the family Atherinidae, containing 25 of the 71 species. Species The currently recognized species in this genus are: * '' Craterocephalus amniculus'' Crowley & Ivantsoff, 1990 (Darling River hardyhead) * '' Craterocephalus capreoli'' Rendahl ( de), 1922 (Rendahl's hardyhead) * '' Craterocephalus centralis'' Crowley & Ivantsoff, 1990 (Finke River hardyhead) * '' Craterocephalus cuneiceps'' Whitley, 1944 (Murchison River hardyhead) * '' Craterocephalus dalhousiensis'' Ivantsoff & Glover, 1974 (Dalhousie hardyhead) * '' Craterocephalus eyresii'' ( Steindachner, 1883) (Lake Eyre hardyhead) * '' Craterocephalus fistularis'' Crowley, Ivantsoff & G. R. Allen, 1995 * '' Craterocephalus fluviatilis'' McCulloch, 1912 (Murray hardyhead) * '' Craterocephalus fulvus'' Ivantsoff, Crowley & Allen, 1987 (Unspecked hardyhead) * '' Craterocep ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Freshwater Fish Of The Northern Territory
Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salts and other total dissolved solids. Although the term specifically excludes seawater and brackish water, 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. Fresh water is the water resource that is of the most and immediate use to humans. Water is critical to the survival of all living organisms. Many organisms can thrive on salt water, but the great majority of higher plants and most insects, amphibians, reptiles, mammals and birds need fresh water to survive. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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