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Enderby Island Cattle
Enderby Island Cattle are a breed of cattle that existed in a wild state in isolation on Enderby Island, New Zealand for over 80 years. Only about seven specimens remain today (all on mainland New Zealand), after a rescue expedition by the Rare Breeds Conservation Society of New Zealand (RBCSNZ), and a culling program to protect the native flora and fauna of Enderby Island. There have since been intensive efforts at breeding the cattle, involving both in vitro fertilisation and cloning, and there is an ongoing program to perpetuate the breed in captivity. History Nine cattle (the exact breed remains obscure) were introduced to Enderby Island, the northernmost of the subantarctic Auckland Islands group, in the 1890s when an attempt was made to establish farming on the island. The attempt failed because of the climate, with the island being abandoned in 1910 and the cattle left behind. Over the 80 years of subsequent isolation the cattle survived well despite the harsh climate, f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Enderby Island, New Zealand
Enderby Island is part of New Zealand's uninhabited Auckland Islands archipelago, south of mainland New Zealand. It is situated just off the northern tip of Auckland Island, the largest island in the archipelago. Geography and geology Enderby Island lies off the northeastern extremity of Auckland Island, directly across from the mouth of Port Ross, from which it is separated by some . Several islands lie in the strait between the two islands, notably Rose, Ewing, and Ocean Islands. Of these, Rose Island lies between the two closest points on Auckland and Enderby Island, separated from them by two narrow channels, each some in width. The island comprises around 1% of the total land area of the Auckland island group. Enderby Island has few notable geographic features. It is surrounded by cliffs and rocky shorelines, with the only landing point being at Sandy Bay in the island's southwest. Several historic huts are located at this bay, which is also home to a breeding colony of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sperm
Sperm (: sperm or sperms) is the male reproductive Cell (biology), cell, or gamete, in anisogamous forms of sexual reproduction (forms in which there is a larger, female reproductive cell and a smaller, male one). Animals produce motile sperm with a tail known as a flagellum, which are known as spermatozoa, while some red algae and fungi produce non-motile sperm cells, known as spermatia. Flowering plants contain non-motile sperm inside pollen, while some more basal plants like ferns and some gymnosperms have motile sperm. Sperm cells form during the process known as spermatogenesis, which in amniotes (reptiles and mammals) takes place in the seminiferous tubules of the testicles. This process involves the production of several successive sperm cell precursors, starting with spermatogonia, which Cellular differentiation, differentiate into spermatocytes. The spermatocytes then undergo meiosis, reducing their Ploidy, chromosome number by half, which produces spermatids. The sper ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
History Of The New Zealand Outlying Islands
History is the systematic study of the past, focusing primarily on the human past. As an academic discipline, it analyses and interprets evidence to construct narratives about what happened and explain why it happened. Some theorists categorize history as a social science, while others see it as part of the humanities or consider it a hybrid discipline. Similar debates surround the purpose of history—for example, whether its main aim is theoretical, to uncover the truth, or practical, to learn lessons from the past. In a more general sense, the term ''history'' refers not to an academic field but to the past itself, times in the past, or to individual texts about the past. Historical research relies on primary and secondary sources to reconstruct past events and validate interpretations. Source criticism is used to evaluate these sources, assessing their authenticity, content, and reliability. Historians strive to integrate the perspectives of several sources to develop a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Invasive Animal Species In New Zealand
The animals of New Zealand, part of its Biota of New Zealand, biota, have an unusual history because, before the arrival of humans less than 900 years ago, the country was mostly free of mammals, except those that could swim there (Pinniped, seals, sea lions, and, off-shore, whales and dolphins) or fly there (bats). However, as recently as the Miocene, it was home to the terrestrial Saint Bathans mammal, implying that mammals had been present since the island had broken away from other landmasses. The absence of mammals meant that all of the ecological niches occupied by mammals elsewhere were occupied instead by either insects or birds, leading to an unusually large number of flightless birds, including the Kiwi (bird), kiwi, the weka, the moa (now extinct), the takahē, and the kākāpō. Because of the lack of predators, even bats spend most of their time on the ground. There are also about 60 species of lizard (30 each of gecko and skink), frogs of New Zealand, four species ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fauna Of The Auckland Islands
Fauna (: faunae or faunas) is all of the animal life present in a particular region or time. The corresponding terms for plants and fungi are ''flora'' and ''funga'', respectively. Flora, fauna, funga and other forms of life are collectively referred to as '' biota''. Zoologists and paleontologists use ''fauna'' to refer to a typical collection of animals found in a specific time or place, e.g. the "Sonoran Desert fauna" or the "Burgess Shale fauna". Paleontologists sometimes refer to a sequence of faunal stages, which is a series of rocks all containing similar fossils. The study of animals of a particular region is called faunistics. Etymology ''Fauna'' comes from the name Fauna, a Roman goddess of earth and fertility, the Roman god Faunus, and the related forest spirits called Fauns. All three words are cognates of the name of the Greek god Pan, and ''panis'' is the Modern Greek equivalent of fauna (πανίς or rather πανίδα). ''Fauna'' is also the word for a boo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cattle Breeds Originating In New Zealand
Cattle (''Bos taurus'') are large, domesticated, bovid ungulates widely kept as livestock. They are prominent modern members of the subfamily Bovinae and the most widespread species of the genus ''Bos''. Mature female cattle are called cows and mature male cattle are bulls. Young female cattle are called heifers, young male cattle are oxen or bullocks, and castrated male cattle are known as steers. Cattle are commonly raised for meat, for dairy products, and for leather. As draft animals, they pull carts and farm implements. Cattle are considered sacred animals within Hinduism, and it is illegal to kill them in some Indian states. Small breeds such as the miniature Zebu are kept as pets. Taurine cattle are widely distributed across Europe and temperate areas of Asia, the Americas, and Australia. Zebus are found mainly in India and tropical areas of Asia, America, and Australia. Sanga cattle are found primarily in sub-Saharan Africa. These types, sometimes classified ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Campbell Island Cattle
Campbell Island cattle were a feral breed of domestic cattle (''Bos taurus'') found on Campbell Island, New Zealand. From photographs taken in 1976 it appeared that the cattle were at least partly of shorthorn origin. This breed is now extinct. History Cattle were introduced to Campbell Island in 1902, along with sheep and other livestock, as part of an ill-fated attempt to establish farming there. It was reported that, by 1910, there were ten cows and six bulls present, which were allowed to run wild. In 1931 the farming attempt had failed and the cattle were abandoned. A small herd of about 20 animals persisted until the 1970s, after which a programme of eradicating introduced livestock was implemented, with the cattle being exterminated by about 1984. See also * Enderby Island cattle Enderby Island Cattle are a breed of cattle that existed in a wild state in isolation on Enderby Island, New Zealand for over 80 years. Only about seven specimens remain today (all on mainl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shetland Cattle
The Shetland is a small, hardy Scottish breed of cattle from the Shetland Islands to the north of mainland Scotland. The cattle are normally black and white in colour but there are smaller numbers in grey, red and dun. History Cattle were one of the originally domesticated breeds of livestock kept by the Neolithic settlers of the Shetland islands. This happened probably no later than circa 3,600 BC. The early remains indicate a very large animal for these early farmers to cope with. It is believed these early cattle were young aurochs ''(Bos primigenius primigenius),'' captured in the Scottish forests, the direct ancestor. Cattle bones found in these early Shetland settlements show evidence of domestication. Their joints show traces of arthritis, the teeth indicate periods of stress (manifested as rings of lighter and darker ridges), indicating regular winter hardship. Gradually, a smaller animal started to appear in the archaeological remains, and by the Bronze Age, start ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shorthorn
The Shorthorn breed of cattle originated in the North East of England in the late eighteenth century. The breed was developed as dual-purpose, suitable for both dairy and beef production; however, certain blood lines within the breed always emphasised one quality or the other. Over time, these different lines diverged, and by the second half of the twentieth century, two separate breeds had developed – the Beef Shorthorn, and the Milking Shorthorn. All Shorthorn cattle are coloured red, white, or roan, although roan cattle are preferred by some, and completely white animals are not common. However, one type of Shorthorn has been bred to be consistently white – the Whitebred Shorthorn, which was developed to cross with black Galloway cattle to produce a popular blue roan crossbreed, the Blue Grey. History The breed developed from Teeswater and Durham cattle found originally in the North East of England. In the late eighteenth century, the Colling brothers, Charles a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Enderby Island Rabbit
The Enderby Island Rabbit, or simply Enderby rabbit or Enderby, is a rare breed of domesticated European rabbit (''Oryctolagus cuniculus''). It originates from rabbits introduced to Enderby Island, an uninhabited subantarctic island in New Zealand’s Auckland Islands group, from Australia in October 1865 to serve as castaway food. Over 130 years the isolated population became a distinctive variety. The rabbits were eventually exterminated for wildlife management from Enderby Island in the early 1990s, but a breeding group of 49 rabbits was rescued by the Rare Breeds Conservation Society of New Zealand in September 1992. Since then rabbit breeders have maintained numbers at around 100-150 individuals, primarily through the work of ''Sitereh Schouten'' and the ''Enderby Island Rabbit Club of NZ''. They have ensured breed purity with pedigrees and ear tattoos which exclusively include a Z along with an individual number. Description Enderby Island Rabbits are mainly silver-grey in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oocyte
An oocyte (, oöcyte, or ovocyte) is a female gametocyte or germ cell involved in reproduction. In other words, it is an immature ovum, or egg cell. An oocyte is produced in a female fetus in the ovary during female gametogenesis. The female germ cells produce a primordial germ cell (PGC), which then undergoes mitosis, forming oogonia. During oogenesis, the oogonia become primary oocytes. An oocyte is a form of genetic material that can be collected for cryoconservation. Formation The formation of an oocyte is called oocytogenesis, which is a part of oogenesis. Oogenesis results in the formation of both primary oocytes during fetal period, and of secondary oocytes after it as part of ovulation. Characteristics Cytoplasm Oocytes are rich in cytoplasm, which contains yolk granules to nourish the cell early in development. Nucleus During the primary oocyte stage of oogenesis, the nucleus is called a germinal vesicle. The only normal human type of secondary oocyte has the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rare Breeds Conservation Society Of New Zealand
__NOTOC__ The Rare Breeds Conservation Society of New Zealand (RBCSNZ) was founded in 1988 to conserve, record and promote rare livestock breeds with the aim of maintaining genetic diversity within livestock species. The area of coverage is broad, and includes poultry as well as camelids, cattle, chinchillas, deer, donkeys, goats, horses, pigs, rabbits and sheep. Auckland Islands expeditions Projects carried out by the RBCSNZ have included expeditions to the subantarctic Auckland Islands group to rescue live specimens of the introduced but long-isolated populations of Enderby Island Rabbits, Enderby Island Cattle and Auckland Island PigsRobins, Judith H.; Matisoo-Smith, Elizabeth; & Ross, Howard A. (2003). The origins of the feral pigs on the Auckland Islands. ''Journal of the Royal Society of New Zealand'' 33(2): 561-569. for captive breeding in New Zealand before their eradication from the Auckland Islands in the course of conservation management. See also * :Animal breeds ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
