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Shortjaw Kōkopu
The shortjaw kōkopu (''Galaxias postvectis'') is a galaxiid ray-finned fish, endemic to New Zealand. They are large, scaleless fish which inhabit stable pools in cascading, bouldery streams with forest cover. Shortjaw kōkopu are amphidromous, with the fry going to sea after hatching, and returning as juveniles to fresh water where they grow to adulthood. They may grow to a maximum of in total length, but more commonly reach . The shortjaw kōkopu live in microhabitats that have more large particles at the bed of the body of water (substrates) and more places to seek safety compared to all nearby possible habitats. During the night, they remain in calmer areas like pools, whereas during the day shortjaw kōkopu spend their time in places with large substrates and a more tumultuous water surface, staying in both flow channel and pool habits. In 2023 a newly recorded population of this species was detected in the Kopuawhara catchment north of Māhia Peninsula in Hawkes Bay usin ...
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Frank Edward Clarke
Frank Edward Clarke (20 December 1848 – 1 July 1899) was a New Zealand ichthyologist and scientific illustrator. He discovered numerous fish species previously unknown to science and was the third most active describer of those new species in New Zealand from 1870 to 1905. Clarke was also an artist and a collection of his scientific illustrations is held at Museum of New Zealand Te Papa Tongarewa. Biography Early life Clarke was born in Suffolk, England on 20 December 1848, son of Edward Clarke, Esq., M.D., L.M., M.H.S. and Anne Leah Clarke (nee Clarkson). In early 1876 Clarke was appointed Chief draftsman in the Survey Department in Westland District, Westland. Scientific and artistic contributions Clarke was a member of the Royal Society of New Zealand, New Zealand Institute, as the Royal Society of New Zealand was then known, and was a trustee of the Westland Institute. He read his scientific papers before the Westland Institute, the Hokitika Literary Society and the ...
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Galaxiid
The Galaxiidae are a family of mostly small freshwater fish in the Southern Hemisphere. The majority live in Southern Australia or New Zealand, but some are found in South Africa, southern South America, Lord Howe Island, New Caledonia, and the Falkland Islands. One galaxiid species, the common galaxias (''Galaxias maculatus''), is probably the most widely naturally distributed freshwater fish in the Southern Hemisphere. They are coolwater species, found in temperate latitudes, with only one species known from subtropical habitats. Many specialise in living in cold, high-altitude upland rivers, streams, and lakes. Some galaxiids live in fresh water all their lives, but many have a partially marine lifecycle. In these cases, larvae are hatched in a river, but are washed downstream to the ocean, later returning to rivers as juveniles to complete their development to full adulthood. This pattern differs from that of salmon, which only return to fresh water to breed, and is describ ...
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Ray-finned Fish
Actinopterygii (; ), members of which are known as ray-finned fish or actinopterygians, is a class of bony fish that comprise over 50% of living vertebrate species. They are so called because of their lightly built fins made of webbings of skin supported by radially extended thin bony spines called '' lepidotrichia'', as opposed to the bulkier, fleshy lobed fins of the sister clade Sarcopterygii (lobe-finned fish). Resembling folding fans, the actinopterygian fins can easily change shape and wetted area, providing superior thrust-to-weight ratios per movement compared to sarcopterygian and chondrichthyian fins. The fin rays attach directly to the proximal or basal skeletal elements, the radials, which represent the articulation between these fins and the internal skeleton (e.g., pelvic and pectoral girdles). The vast majority of actinopterygians are teleosts. By species count, they dominate the subphylum Vertebrata, and constitute nearly 99% of the over 30,000 extant ...
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New Zealand
New Zealand () is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and List of islands of New Zealand, over 600 smaller islands. It is the List of island countries, sixth-largest island country by area and lies east of Australia across the Tasman Sea and south of the islands of New Caledonia, Fiji, and Tonga. The Geography of New Zealand, country's varied topography and sharp mountain peaks, including the Southern Alps (), owe much to tectonic uplift and volcanic eruptions. Capital of New Zealand, New Zealand's capital city is Wellington, and its most populous city is Auckland. The islands of New Zealand were the last large habitable land to be settled by humans. Between about 1280 and 1350, Polynesians began to settle in the islands and subsequently developed a distinctive Māori culture. In 1642, the Dutch explorer Abel Tasman became the first European to sight and record New Zealand. ...
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Amphidromous
Fish migration is mass relocation by fish from one area or body of water to another. Many types of fish migrate on a regular basis, on time scales ranging from daily to annually or longer, and over distances ranging from a few metres to thousands of kilometres. Such migrations are usually done for better feeding or to reproduce, but in other cases the reasons are unclear. Fish migrations involve movements of schools of fish on a scale and duration larger than those arising during normal daily activities. Some particular types of migration are ''anadromous'', in which adult fish live in the sea and migrate into fresh water to spawn; and ''catadromous'', in which adult fish live in fresh water and migrate into salt water to spawn. Marine forage fish often make large migrations between their spawning, feeding and nursery grounds. Their movements are associated with ocean currents and with the availability of food in different areas at different times of the year. The migratory ...
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Fish Measurement
Fish measurement is the measuring of individual fish and various parts of their anatomies, for data used in many areas of ichthyology, including taxonomy and fishery biology. Overall length Standard length (SL) is the length of a fish measured from the tip of the snout to the posterior end of the last vertebra or to the posterior end of the midlateral portion of the hypural plate. This measurement excludes the length of the caudal (tail) fin. Total length (TL) is the length of a fish measured from the tip of the snout to the tip of the longer lobe of the caudal fin, usually measured with the lobes compressed along the midline. It is a straight-line measure, not measured over the curve of the body. Standard length measurements are used with Teleostei (most bony fish), while total length measurements are used with Myxini (hagfish), Petromyzontiformes ( lampreys) and usually Elasmobranchii (shark Sharks are a group of elasmobranch cartilaginous fish characterized by ...
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Māhia Peninsula
Māhia Peninsula () is located on the east coast of New Zealand's North Island, in the Hawke's Bay region, between the towns of Wairoa and Gisborne. It includes Rocket Lab's Launch Complex 1, located near Ahuriri Point at the southern tip of the Māhia Peninsula, for launching its Electron rockets. Since 2018, it has been used as a commercial launcher of small satellites in the range of 135–235 kg, and miniature satellites called CubeSats. New Zealand's first orbital space launch took place from Launch Complex 1 on 21 January 2018. Geography The peninsula is long and wide. Its highest point is Rahuimokairoa, above sea level. The peninsula was once an island, but now a tombolo joins it to the North Island. Demographics Māhia Beach, which is on the northeast coast of the peninsula, is described by Statistics New Zealand as a rural settlement. It covers and had an estimated population of as of with a population density of people per km2. It is part of the lar ...
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Environmental DNA
Environmental DNA or eDNA is DNA that is collected from a variety of environmental samples such as soil, seawater, snow or air, rather than directly sampled from an individual organism. As various organisms interact with the environment, DNA is expelled and accumulates in their surroundings from various sources. Such eDNA can be DNA sequencing#High-throughput methods, sequenced by environmental omics to reveal facts about the species that are present in an ecosystem — even microscopic ones not otherwise apparent or detectable. In recent years, eDNA has been used as a tool to detect endangered wildlife that were otherwise unseen. In 2020, human health researchers began repurposing eDNA techniques to track the COVID-19 pandemic. Example sources of eDNA include, but are not limited to, feces, mucus, gametes, Moulting, shed skin, Carrion, carcasses and hair. Samples can be analyzed by High throughput sequencing, high-throughput DNA sequencing methods, known as metagenomics, Mic ...
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The New Zealand Herald
''The New Zealand Herald'' is a daily newspaper published in Auckland, New Zealand, owned by New Zealand Media and Entertainment, and considered a newspaper of record for New Zealand. It has the largest newspaper circulation in New Zealand, peaking at over 200,000 copies in 2006, although circulation of the daily ''Herald'' had declined to 100,073 copies on average by September 2019. The ''Herald''s publications include a daily paper; the ''Weekend Herald'', a weekly Saturday paper; and the ''Herald on Sunday'', which has 365,000 readers nationwide. The ''Herald on Sunday'' is the most widely read Sunday paper in New Zealand. The paper's website, nzherald.co.nz, is viewed 2.2 million times a week and was named Voyager Media Awards' News Website of the Year in 2020, 2021, 2022, and 2023. In 2023, the ''Weekend Herald'' was awarded Weekly Newspaper of the Year and the publication's mobile application was the News App of the Year. Its main circulation area is the Auckland R ...
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Radio New Zealand
Radio New Zealand (), commonly known as RNZ or Radio NZ, is a New Zealand public service broadcaster and Crown entity. Established under the Radio New Zealand Act 1995, it operates news and current affairs station, RNZ National, and a classical music and jazz station, RNZ Concert, with full government funding from NZ On Air. Since 2014, the organisation's focus has been to transform from a radio broadcaster to a multimedia outlet, increasing its production of digital content in audio, video, and written forms, utilising rnz.co.nz and the RNZ app. The organisation plays a central role in New Zealand public broadcasting. The New Zealand Parliament fully funds its AM network, used in part for the broadcast of parliamentary proceedings. RNZ has a statutory role under the Civil Defence Emergency Management Act 2002 to act as a "lifeline utility" in emergencies. It is also responsible for an international service, RNZ Pacific, which broadcasts to the South Pacific in both ...
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Critter Of The Week
''Critter of the Week'' is a weekly RNZ National programme about endangered and neglected native plants and animals of New Zealand. Beginning in 2015, ''Critter of the Week'' is an approximately 15-minute discussion between Nicola Toki (originally the Department of Conservation Threatened Species Ambassador) and RNZ Afternoons host Jesse Mulligan on an "uncharismatic and lovable" New Zealand species. Despite its name, the show features animals, plants, and fungi, with each species receiving an "attractiveness" score from 1 to 10. The show currently airs on Friday afternoons, and has a regular listenership of 100,000. Origin and development The topic of spotlighting uncharismatic species was raised in an interview by Mulligan in April 2015, and the programme originated later in 2015 in a discussion between Mulligan and Toki about threatened bird conservation, in which Toki lamented a lack of attention and corporate funding for species such as the '' Smeagol'' gravel slug. ...
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Galaxias
''Galaxias'' is a genus of small freshwater fish in the family Galaxiidae, and are frequently referred to as the galaxiids. These highly adaptable fish are typically found at temperate latitudes across the Southern Hemisphere. Galaxiids are scaleless and somewhat tubular in body form, ranging from very slender to quite bulky. They are somewhat torpedo-shaped, with the dorsal and anal fins positioned close to the tail. They are generally small, with typical adults ranging between in total length, with some stocky species attaining around . The largest, ''Galaxias argenteus'', has been recorded at , although is a more typical adult length. Species The 46 recognized species in this genus are: * '' Galaxias aequipinnis'' Raadik, 2014 (East Gippsland Galaxias) * '' Galaxias anomalus'' Stokell, 1959 (Roundhead Galaxias) * '' Galaxias arcanus'' Raadik, 2014 (Riffle Galaxias) * '' Galaxias argenteus'' Gmelin, 1789 (Giant Kōkopu) * '' Galaxias auratus'' Johnston, 1883 (Golden ...
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