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Harvey Estuary
The Peel-Harvey Estuarine System ( nys, Djilba) is a natural estuarine system that lies roughly parallel to the coast of Western Australia and south of the town of Mandurah. The strip of land between the Indian Ocean and the estuarine system carries the Old Coast Road and to the east is the Forrest Highway which is the main thoroughfare between Perth and the coastal towns of the south west corner of the state including Bunbury and Busselton. Description The estuarine system, which the Bindjareb Noongar people call , covers an area of approximately in total, with an average water depth of about . The Harvey River discharges into the extreme southern end of the elongated Harvey Estuary, which has an area of about . This in turn feeds into the south-western corner of the more northerly Peel Inlet which is roughly circular and occupies an area of about . The Serpentine River and Murray Rivers discharge into the eastern edges of Peel Inlet. A long channel, the Mandurah Estu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Estuary
An estuary is a partially enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea. Estuaries form a transition zone between river environments and maritime environments and are an example of an ecotone. Estuaries are subject both to marine influences such as tides, waves, and the influx of saline water, and to fluvial influences such as flows of freshwater and sediment. The mixing of seawater and freshwater provides high levels of nutrients both in the water column and in sediment, making estuaries among the most productive natural habitats in the world. Most existing estuaries formed during the Holocene epoch with the flooding of river-eroded or glacially scoured valleys when the sea level began to rise about 10,000–12,000 years ago. Estuaries are typically classified according to their geomorphological features or to water-circulation patterns. They can have many different names, such as bays, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dawesville Channel
Dawesville Channel (also known as Dawesville Cut) is an artificial channel between the Peel-Harvey Estuary and the Indian Ocean at Dawesville, about south of Perth in Western Australia. It is south of the regional city of Mandurah and north of Yalgorup National Park. The channel alleviated a serious environmental problem, by allowing seawater from the Indian Ocean to move in and out of the estuarine system using the daily tidal movements, preventing the build-up of algae. Before the construction of the canal, much of the estuarine system, which is approximately and about deep, had become eutrophic. The ability of the system to support the natural flora and fauna had become seriously degraded, and the smell of rotting algae, particularly during the summer months, had caused increasing complaints from residents. Stocks of normally-abundant fish and crabs had become depleted and recreational use of the estuaries was adversely affected. The deteriorating conditions became a majo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Important Bird Area
An Important Bird and Biodiversity Area (IBA) is an area identified using an internationally agreed set of criteria as being globally important for the conservation of bird populations. IBA was developed and sites are identified by BirdLife International. There are over 13,000 IBAs worldwide. These sites are small enough to be entirely conserved and differ in their character, habitat or ornithological importance from the surrounding habitat. In the United States the Program is administered by the National Audubon Society. Often IBAs form part of a country's existing protected area network, and so are protected under national legislation. Legal recognition and protection of IBAs that are not within existing protected areas varies within different countries. Some countries have a National IBA Conservation Strategy, whereas in others protection is completely lacking. History In 1985, following a specific request from the European Economic Community, Birdlife International ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BirdLife International
BirdLife International is a global partnership of non-governmental organizations that strives to conserve birds and their habitats. BirdLife International's priorities include preventing extinction of bird species, identifying and safeguarding important sites for birds, maintaining and restoring key bird habitats, and empowering conservationists worldwide. It has a membership of more than 2.5 million people across 116 country partner organizations, including the Royal Society for the Protection of Birds, the Wild Bird Society of Japan, the National Audubon Society and American Bird Conservancy. BirdLife International has identified 13,000 Important Bird and Biodiversity Areas and is the official International Union for Conservation of Nature’s Red List authority for birds. As of 2015, BirdLife International has established that 1,375 bird species (13% of the total) are threatened with extinction ( critically endangered, endangered or vulnerable). BirdLife International p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dolphin
A dolphin is an aquatic mammal within the infraorder Cetacea. Dolphin species belong to the families Delphinidae (the oceanic dolphins), Platanistidae (the Indian river dolphins), Iniidae (the New World river dolphins), Pontoporiidae (the brackish dolphins), and the extinct Lipotidae (baiji or Chinese river dolphin). There are 40 extant species named as dolphins. Dolphins range in size from the and Maui's dolphin to the and orca. Various species of dolphins exhibit sexual dimorphism where the males are larger than females. They have streamlined bodies and two limbs that are modified into flippers. Though not quite as flexible as seals, some dolphins can briefly travel at speeds of per hour or leap about . Dolphins use their conical teeth to capture fast-moving prey. They have well-developed hearing which is adapted for both air and water. It is so well developed that some can survive even if they are blind. Some species are well adapted for diving to great depths. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South Australian Cobbler
The South Australian cobbler (''Gymnapistes marmoratus''), better known as the soldier but also known as the cobbler, devilfish or soldierfish, is a species of marine ray-finned fish, a waspfish, belonging to the subfamily Tetraroginae which is classified within the family Scorpaenidae, the scorpionfishes and their relatives. It is endemic to southern Australia. It is the only species in the monotypic genus ''Gymnapistes''. Taxonomy The South Australian cobbler was first formally described in 1829 as ''Apistus marmoratus'' by the French zoologist Georges Cuvier with the type locality given as "Timor Island, southern Malay Archipelago", although this is likely to be an error and the actual locality is in Western Australia. In 1839 the English zoologist William John Swainson placed it in the new genus ''Gymnapistes'', as its only species. This taxon is included in the subfamily Tetraroginae within the Scorpaenidae in the 5th edition of ''Fishes of the World'' however other authori ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bluefish
The bluefish (''Pomatomus saltatrix'') is the only extant species of the family Pomatomidae. It is a marine pelagic fish found around the world in temperate and subtropical waters, except for the northern Pacific Ocean. Bluefish are known as tailor in Australia and New Zealand, elf and shad in South Africa. It is a popular gamefish and food fish. The bluefish is a moderately proportioned fish, with a broad, forked tail. The spiny first dorsal fin is normally folded back in a groove, as are its pectoral fins. Coloration is a grayish blue-green dorsally, fading to white on the lower sides and belly. Its single row of teeth in each jaw is uniform in size, knife-edged, and sharp. Bluefish commonly range in size from seven-inch (18-cm) "snappers" to much larger, sometimes weighing as much as 40 lb (18 kg), though fish heavier than 20 lb (9 kg) are exceptional. Systematics The bluefish is the only extant species now included in the family Pomatomidae. At one ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mulloway
''Argyrosomus japonicus'' is a silvery to bronze-green colored fish, a member of the family Sciaenidae, which may grow up to in length. It is known as Japanese meagre (FAO), mulloway or jewfish on the east coast of Australia, butterfish in South Australia, kingfish or river kingfish in Western Australia, and dusky/squaretail kob, dusky salmon, salmon or kabeljou in South Africa, Ô-nibe (大鮸, オオニベ) in Japan. The name jewfish refers to its large otoliths, which are prized as "jewels" by some fishers. Description ''Argyrosomus japonicus'' is a large, slender fish which can grow to . It has a copper-colored head and is silvery with a bronze-green dorsal surface and paler belly. It has a row of distinctive white spots running along the lateral line. The caudal fin is angular in juveniles but becomes more rounded in larger fish. Distribution and habitat ''Argyrosomus japonicus'' has an Indo-Pacific distribution occurring in coastal waters surrounding Australia, Africa, Indi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acanthopagrus Butcheri
''Acanthopagrus butcheri'', the black bream but also commonly known as the southern black bream, southern bream and blue-nosed bream, is a species of marine and freshwater fish of the porgy family, Sparidae. It is a deep-bodied fish, occasionally confused with other similar species that occur within its range, but is generally distinguished from these species by a lack of yellow ventral and anal fins. Southern black bream are endemic to Australia, inhabiting the southern coast from Shark Bay in Western Australia to Ulladulla, New South Wales, as well as Tasmania. The species is primarily an inhabitant of estuaries and coastal lakes, rarely entering the ocean, as it cannot complete its life cycle in a fully marine environment. During the breeding season, the species is known to penetrate into the upper reaches of rivers to spawn, causing an influx of juveniles in the estuaries a few months later. Black bream are opportunistic predators, consuming a wide range of crustaceans, moll ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Melicertus Latisulcatus
''Melicertus'' is a genus of "king" prawns, comprising eight species which were previously classified as members of the genus ''Penaeus'': *'' Melicertus canaliculatus'' (Olivier, 1811) - witch prawn *''Melicertus hathor'' (Burkenroad, 1959) *''Melicertus kerathurus'' (Forskål, 1775) - caramote prawn, striped prawn *''Melicertus latisulcatus'' (Kishinouye, 1896) - western king prawn (Australia) *''Melicertus longistylus'' (Kubo, 1943) - redspot king prawn *''Melicertus marginatus'' (Randall, 1840) - aloha prawn *''Melicertus plebejus'' (Hess, 1865) - eastern king prawn *''Melicertus similis ''Melicertus'' is a genus of "king" prawns, comprising eight species which were previously classified as members of the genus ''Penaeus'': *'' Melicertus canaliculatus'' (Olivier, 1811) - witch prawn *'' Melicertus hathor'' (Burkenroad, 1959) ...'' Chanda & Bhattacharya, 2002 References Penaeidae Crustaceans of Australia Crustacean genera Taxa named by Constantine Samuel Ra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blue Swimmer Crab
Blue is one of the three primary colours in the RYB color model, RYB colour model (traditional colour theory), as well as in the RGB color model, RGB (additive) colour model. It lies between Violet (color), violet and cyan on the optical spectrum, spectrum of visible light. The eye perceives blue when observing light with a dominant wavelength between approximately 450 and 495 nanometres. Most blues contain a slight mixture of other colours; Azure (color), azure contains some green, while ultramarine contains some violet. The clear daytime sky and the deep sea appear blue because of an optical effect known as Rayleigh scattering#Cause of the blue colour of the sky, Rayleigh scattering. An optical effect called Tyndall effect explains Eye color#Blue, blue eyes. Distant objects appear more blue because of another optical effect called aerial perspective. Blue has been an important colour in art and decoration since ancient times. The semi-precious stone lapis lazuli was used i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leschenault Estuary
Leschenault Estuary is an estuarine lagoon that lies to the north of Bunbury, Western Australia. It had in the past met the Indian Ocean at the Leschenault Inlet, but that has been altered by harbour works for Bunbury, and the creation of The Cut north of the historical inlet location. The estuary is approximately in length and has a maximum width of approximately . The total area of the estuary is The lagoon is separated from the ocean by a thin peninsula of sand dunes called the Leschenault Peninsula. Catchment The catchment area below Wellington Dam for the estuary covers . The catchment includes part of the Swan Coastal Plain, the Darling Scarp and the Darling Plateau. The Collie and Preston Rivers are the main catchment rivers and enter the estuary from the southern end and with the catchment runoff discharging into the Indian ocean via the cut in the peninsula. Other rivers in the catchment area include the Brunswick River, Ferguson and Wellesley as well as numerous ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
