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Orcaella Heinsohni
The Australian snubfin dolphin (''Orcaella heinsohni'') is a dolphin found off the northern coasts of Australia. It closely resembles the Irrawaddy dolphin (of the same genus, ''Orcaella'') and was not described as a separate species until 2005. The closest relative to the genus ''Orcaella'' is the killer whale, ''Orcinus orca''. The Australian snubfin has three colors on its skin, while the Irrawaddy dolphin only has two. The skull and the fins also show minor differences between the two species. Taxonomy The taxonomic specific name, ''heinsohni'', was chosen in honor of George Heinsohn, an Australian biologist who worked at James Cook University, "for his pioneering work on northeast Australian odontocetes, including the collection and initial analysis of ''Orcaella heinsohni'' specimens which form the basis for much of our knowledge of the new species". New species of large mammals are quite rarely described nowadays, and those that are usually are from remote areas â ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orcaella
The snubfin dolphins (''Orcaella'') are a genus of cetaceans containing two members: the Irrawaddy dolphin (''Orcaella brevirostris'') and the Australian snubfin dolphin (''Orcaella heinsohni''). The genus was long believed to be monotypic with the only species being the Irrawaddy dolphin; however, in 2005, supposed Irrawaddy dolphin populations inhabiting the Australian/New Guinean regions were found to be significantly different and were declared a separate new species named the Australian snubfin dolphin. Taxonomy and evolution Until 2005, ''Orcaella brevirostris'' was the only recognized species in the genus ''Orcaella''. However, comparisons within the populations of ''Orcaella'' inhabiting the Asia region and populations inhabiting the Australia/New Guinea region show distinctions in habitat, morphology, and genetics.Ross, G. J. (2006). Review of the conservation status of Australia's smaller whales and dolphins. Department of the Environment and Water Resources. Morphologic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isabel Beasley
Isabel is a female name of Spanish origin. Isabelle is a name that is similar, but it is of French origin. It originates as the medieval Spanish form of '' Elisabeth'' (ultimately Hebrew ''Elisheva''), Arising in the 12th century, it became popular in England in the 13th century following the marriage of Isabella of Angoulême to the king of England. Today sometimes abbreviated to Isa. Etymology This set of names is a Spanish variant of the Hebrew name Elisheba through Latin and Greek represented in English and other western languages as Elisabeth. Albert Dauzat, ''Noms et prénoms de France'', Librairie Larousse 1980, édition revue et commentée par Marie-Thérèse Morlet, p. 337a.Chantal Tanet et Tristan Hordé, ''Dictionnaire des prénoms'', Larousse, Paris, 2009, p. 38 These names are derived from the Latin and Greek renderings of the Hebrew name based on both etymological and contextual evidence (the use of Isabel as a translation of the name of the mother of John the Bapt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Skipper (boating)
A sea captain, ship's captain, captain, master, or shipmaster, is a high-grade licensed mariner who holds ultimate command and responsibility of a merchant vessel.Aragon and Messner, 2001, p.3. The captain is responsible for the safe and efficient operation of the ship, including its seaworthiness, safety and security, cargo operations, navigation, crew management, and legal compliance, and for the persons and cargo on board. Duties and functions The captain ensures that the ship complies with local and international laws and complies also with company and flag state policies. The captain is ultimately responsible, under the law, for aspects of operation such as the safe navigation of the ship,Aragon and Messner, 2001, p.4. its cleanliness and seaworthiness,Aragon and Messner, 2001, p.5. safe handling of all cargo,Aragon and Messner, 2001, p.7. management of all personnel,Aragon and Messner, 2001, p.7-11. inventory of ship's cash and stores,Aragon and Messner, 2001, p.11-12. an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fishing Trawler
A fishing trawler is a commercial fishing vessel designed to operate Trawling, fishing trawls. Trawling is a method of fishing that involves actively dragging or pulling a trawl through the water behind one or more trawlers. Trawls are fishing nets that are pulled along the bottom of the sea or in midwater at a specified depth. A trawler may also operate two or more trawl nets simultaneously (double-rig and multi-rig). There are many variants of trawling gear. They vary according to local traditions, bottom conditions, and how large and powerful the trawling boats are. A trawling boat can be a small open boat with only 30 horsepower (22 kW) or a large factory ship with 10,000 horsepower (7457 kW). Trawl variants include beam trawls, large-opening midwater trawls, and large bottom trawls, such as "rock hoppers" that are rigged with heavy rubber wheels that let the net crawl over rocky bottom. History During the 17th century, the British developed the Dogge ... [...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] |
Animal Echolocation
Echolocation, also called bio sonar, is a biological sonar used by several animal species. Echolocating animals emit calls out to the environment and listen to the echoes of those calls that return from various objects near them. They use these echoes to locate and identify the objects. Echolocation is used for navigation, foraging, and hunting in various environments. Echolocating animals include some mammals (most notably Laurasiatheria) and a few birds, especially some bat species and odontocetes (toothed whales and dolphins), but also in simpler forms in other groups such as shrews, and two cave-dwelling bird groups, the so-called cave swiftlets in the genus ''Aerodramus'' (formerly ''Collocalia'') and the unrelated oilbird ''Steatornis caripensis''. Early research The term ''echolocation'' was coined in 1938 by the American zoologist Donald Griffin, who, with Robert Galambos, first demonstrated the phenomenon in bats. As Griffin described in his book, the 18th century I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australian Humpback Dolphin
The Australian humpback dolphin (''Sousa sahulensis'') is a species of humpback dolphin and the fourth recognized humpback dolphin species chronologically. The specific name ''sahulensis'' is derived from the Sahul Shelf, located between northern Australia and southern New Guinea, where the Australian humpback dolphins occur. The species was scientifically described on 31 July 2014 in the journal ''Marine Mammal Science''. As of August 2014, there is no population estimate for the Australian humpback dolphin, but based on available sighting data it is put to "a few thousand". Appearance Australian humpback dolphins are slightly different from the other three humpback dolphin species in overall length, number of teeth, vertebrae and geographic distribution. The dorsal fin of the Australian humpback dolphin is lower and more wide-based than those of the Atlantic humpback dolphin and the Indian Ocean humpback dolphin, and its coloration is dark gray, while its closest humpback re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Delphinid
Oceanic dolphins or Delphinidae are a widely distributed family of dolphins that live in the sea. Close to forty extant species are recognised. They include several big species whose common names contain "whale" rather than "dolphin", such as the Globicephalinae (round-headed whales including the orca and pilot whale). Delphinidae is a family within the superfamily Delphinoidea, which also includes the porpoises (Phocoenidae) and the Monodontidae (beluga whale and narwhal). River dolphins are relatives of the Delphinoidea. Oceanic dolphins range in size from the and Maui's dolphin to the and orca, the largest known dolphin. Several species exhibit sexual dimorphism; 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 travel at speeds 29 km/h (18 mph) for short distances. Most delphinids primarily eat fish, along with a smaller number of squid and small ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Queensland
) , nickname = Sunshine State , image_map = Queensland in Australia.svg , map_caption = Location of Queensland in Australia , subdivision_type = Country , subdivision_name = Australia , established_title = Before federation , established_date = Colony of Queensland , established_title2 = Separation from New South Wales , established_date2 = 6 June 1859 , established_title3 = Federation , established_date3 = 1 January 1901 , named_for = Queen Victoria , demonym = , capital = Brisbane , largest_city = capital , coordinates = , admin_center_type = Administration , admin_center = 77 local government areas , leader_title1 = Monarch , leader_name1 = Charles III , leader_title2 = Governor , leader_name2 = Jeannette Young , leader_title3 = Premier , leader_name3 = Annastacia Palaszczuk ( ALP) , legislature = Parliament of Queensland , judiciary = Supreme Court of Queensland , national_representation = Parliament of Australia , national_representation_type ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Horseshoe Bay, Queensland
Horseshoe Bay is a bay, town and suburb on Magnetic Island in the City of Townsville, Queensland, Australia. It is a major tourist accommodation and recreation centre on the island. In the , the suburb of Horseshoe Bay had a population of 578 people. History Until 1962, it was known as the town of Bee-Ran. Horseshoe Bay Post Office opened by 1935 and closed in 1982. Horseshoe Bay Provisional School opened on 1 July 1949. On 2 September 1954, it became Horseshoe Bay State School. It closed on 28 April 1972. It was located at 2 Heath Street (). At the , the town of Horseshoe Bay had a population of 484. From September 2006, Horseshoe Bay was undergoing a string of housing development behind the existing residential area to the southern part of the bay. In the , the suburb of Horseshoe Bay had a population of 578 people. Education There are no schools in Horseshoe Bay. The nearest primary school is Nelly Bay State School in Nelly Bay on the island. The nearest secondary sch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Queensland Museum
The Queensland Museum is the state museum of Queensland, dedicated to natural history, cultural heritage, science and human achievement. The museum currently operates from its headquarters and general museum in South Brisbane with specialist museums located in North Ipswich in Ipswich, East Toowoomba in Toowoomba, and in Townsville City in Townsville. The museum is funded by the Queensland Government. History The Queensland Museum was founded by the Queensland Philosophical Society on 20 January 1862,''"A Time for a Museum — The History of the Queensland Museum — 1862 to 1986"'', — Patricia Mather, published by the Queensland Museum, Brisbane, Queensland, Australia, 2001 (originally published as ''"Volume 24"'' of ''"The Memoirs of the Queensland Museum"'') one of the principal founders being Charles Coxen, and had several temporary homes in Brisbane, Queensland, Australia. The temporary homes included: The Old Windmill (1862–1869), Parliament House (1869†... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holotype
A holotype is a single physical example (or illustration) of an organism, known to have been used when the species (or lower-ranked taxon) was formally described. It is either the single such physical example (or illustration) or one of several examples, but explicitly designated as the holotype. Under the International Code of Zoological Nomenclature (ICZN), a holotype is one of several kinds of name-bearing types. In the International Code of Nomenclature for algae, fungi, and plants (ICN) and ICZN, the definitions of types are similar in intent but not identical in terminology or underlying concept. For example, the holotype for the butterfly '' Plebejus idas longinus'' is a preserved specimen of that subspecies, held by the Museum of Comparative Zoology at Harvard University. In botany, an isotype is a duplicate of the holotype, where holotype and isotypes are often pieces from the same individual plant or samples from the same gathering. A holotype is not necessarily "typ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
