List of longest-living organisms
This is a list of the oldest individual lifeforms. This is usually defined as:
- Having a longer life span than any other known individual (such as the Methuselah tree)
- Longevity record-holders (such as Jeanne Calment)
Biological immortality
If the mortality rate of a species does not increase after maturity, the species does not age and is said to be biologically immortal. There are many examples of plants and animals for which the mortality rate actually decreases with age, for all or part of the life cycle.[1] Coral colonies and aspen trees are the clearest examples.[citation needed] Some large trees may routinely grow in size for decades, while their mortality rates decrease.[citation needed] Some sources say that sharks, too, grow larger in size while their mortality rate decreases, for long periods of their lives.[citation needed]
If the mortality rate remains constant, the rate determines the mean lifespan. The lifespan can be long or short, even though the species technically "does not age". There are many examples of species for which scientists have not detected an increase in mortality rate after maturity.[citation needed] An alternative explanation for this phenomenon may be that the mean lifespan of the species is so long that the modern scientific study of longevity and senescence has not yet matured enough itself to measure longevity in the species.
- Sanicula is a herb, native to Europe and the Americas, which lives about 70 years in the wild. Old saniculae do not die at a higher rate than younger ones.[citation needed]
- Sea urchins, lobsters and some clams have relatively high rates of mortality in the ocean, but mortality does not appear to increase with age.[citation needed]
- Hydras were observed, in a study published in the journal Experimental Gerontology, for four years without any increase in mortality rate.[2]
There are stranger examples of species that have been observed to regress to a larval state and regrow into adults multiple times:
- The Hydrozoan species Turritopsis nutricula is capable of cycling from a mature adult stage to an immature polyp stage and back again. This means that there may be no natural limit to its life span.[3] However, no single specimen has been observed for any extended period, and it is impossible to estimate the age of a specimen.
- The larvae of carrion beetles have been made to undergo a degree of "reversed development" when starved, and later to grow back to the previously attained level of maturity. The cycle can be repeated many times.[4]
Revived into activity after stasis
- Various claims have been made about reviving bacterial spores to active metabolism after millions of years. There are claims of spores from amber being revived after 40 million years,[5] and spores from salt deposits in New Mexico being revived after 240 million years. These claims have been made by credible researchers, but are not universally accepted.[6][7] In a related find, a scientist was able to coax 34,000 year old salt-captured bacteria to reproduce and his results were duplicated at a separate independent laboratory facility.[8]
- A seed from the previously extinct Judean date palm was revived and managed to sprout after nearly 2,000 years.[9]
- Silene stenophylla was grown from fruit found in an ancient squirrel's cache. The germinated plants bore viable seeds. The fruit was dated to be 31,800 years old ± 300 years.[10]
- In 1994, a seed from a sacred lotus (Nelumbo nucifera), dated at roughly 1,300 years old ± 270 years, was successfully germinated.[11][12]
Clonal plant colonies
As with all long-lived plant and fungal species, no individual part of a clonal colony is alive (in the sense of active metabolism) for more than a very small fraction of the life of the entire clone. Some clonal colonies may be fully connected via their root systems, while most are not actually interconnected, but are genetically identical clones which populated an area through vegetative reproduction. Ages for clonal colonies, often based on current growth rates, are estimates.[13]
- Pando is a Populus tremuloides (Quaking Aspen) tree or clonal colony that has been estimated at 80,000 years old.[14] Unlike many other clonal "colonies" the above ground trunks remain connected to each other via a single massive underground root system. Whether it is to be considered a single tree is disputed, as it depends on one's definition of an individual tree.
- The Jurupa Oak colony is estimated to be at least 13,000 years of age, with other estimates ranging from 5,000 to 30,000 years.
- A huge colony of the sea grass Posidonia oceanica in the Mediterranean Sea is estimated to be between 12,000 and 200,000 years old. The maximum age is theoretical, as the region it occupies was above water at some point between 10,000 and 80,000 years ago.[15][16][17]
- King's Lomatia in Tasmania: The sole surviving clonal colony of this species is estimated to be at least 43,600 years old.[18]
- Eucalyptus recurva: clones in Australia are claimed to be 13,000 years old.[19]
- King Clone is a creosote bush (Larrea tridentata) in the Mojave desert estimated at 11,700 years old.[20] Another creosote bush has been said to be 12,150 years old, but this is as yet unconfirmed.
- A Huon Pine colony on Mount Read, Tasmania is estimated at 10,000 years old, with individual specimens living to over 3,000 years.[21]
- Old Tjikko, a Norway Spruce in Sweden, is a tree on top of roots that have been carbon dated to 9,550 years old. The tree is part of a clonal colony that was established at the end of the last ice age. Discovered by Professor Leif Kullman, at Umeå University, the tree is located in the county of Dalarna in Sweden. Old Tjikko is small, only 5 metres (16 ft) in height.[22][23][24][25]
- A box huckleberry bush in Pennsylvania is thought to be perhaps 8,000 years of age.
- An individual of the fungus species Armillaria solidipes in the Malheur National Forest is thought to be between 2,000 and 8,500 years old.[26][27] It is thought to be the world's largest organism by area, at 2,384 acres (965 hectares).
Individual plant specimens
- A Great Basin Bristlecone Pine (Pinus longaeva) is measured by ring count to be 5073 years old.[28] This is the oldest known tree in North America, and the oldest known living individual tree in the world.
- Llangernyw Yew, the oldest individual tree in Europe and second or third oldest individual tree in the world. Believed to be aged between 4,000 years and 5,000 years old, this ancient yew (Taxus baccata) is in the churchyard of the village of Llangernyw in North Wales.
- Fortingall Yew, an ancient yew (Taxus baccata) in the churchyard of the village of Fortingall in Perthshire, Scotland; one of the oldest known individual trees in Europe. Various estimates have put its age at between 2000 and 5000 years, although these days it is believed to be at the lower end of this range.
- Fitzroya cupressoides is the species with the second oldest verified age, a specimen in Chile being measured by ring count as 3,622 years old.[13]
- A Sacred Fig (Ficus religiosa), the Jaya Sri Maha Bodhi in Anuradhapura, Sri Lanka is 2,300 years old (planted in 288 BC).[29] It is the oldest known flowering plant and the oldest known living to date human-planted tree in the world.[30]
- A specimen of Lagarostrobos franklinii in Tasmania is thought to be about 2000 years old.[31]
- Numerous olive trees are purported to be 2000 years old or older. An olive tree in Ano Vouves, Crete, claiming such longevity, has been confirmed on the basis of tree ring analysis.[32][33]
- Jōmon Sugi, the cryptomeria naturally grown in Yakushima Island, Kagoshima, Japan, more than 2,170 to 7,200 years old.
- Great sugi of Kayano, the cryptomeria deemed planted by humans in Kaga, Ishikawa, Japan, estimated age of 2,300 years in 1928.
- Welwitschia is a monotypic genus of gymnosperm plant, composed solely of the distinct Welwitschia mirabilis. It is the only genus of the family Welwitschiaceae, in the order Welwitschiales, in the division Gnetophyta. The plant is considered a living fossil. Radiocarbon dating has confirmed that there are many individuals which have lived longer than 1000 years, and some are suspected to be older than 2000 years.
- Yareta is a tiny flowering plant in the family Apiaceae native to South America, occurring in the Puna grasslands of the Andes in Peru, Bolivia, the north of Chile and the west of Argentina at between 3,200 and 4,500 metres altitude. Some yaretas could be up to 3,000 years old.[34]
Terrestrial animals
- Adwaita, an Aldabra Giant Tortoise died at the age of 255 in March 2006 in Alipore Zoo, Kolkata, India. It was recorded the oldest Terrestrial animal in the world.
- The tuatara can live well above 100 years. Henry, a tuatara at the Southland Museum in New Zealand, mated for the first time at the age of 111 years in 2009 with an 80-year-old female and fathered 11 baby tuataras.[35]
- Tu'i Malila, a Radiated tortoise, died at an age of 188 years in May 1965, the oldest verified vertebrate.[36]
- Harriet, a Galápagos tortoise, died at the age of 175 years in June 2006.[37]
- A female Blue-and-yellow Macaw named Charlie was reportedly hatched in 1899, which would make her 111 years old, as of 2010. Her age has not been independently confirmed and the claim may not be reliable. She is claimed to have formerly belonged to Winston Churchill, but Churchill's daughter denies the claim.[38]
- Lin Wang, an Asian elephant was the oldest elephant in the Taipei Zoo. He was born in 1917 and died in February 2003 at age 86, surpassing the previous record of 84. Normally elephants live up to 50, while their maximum lifespan is generally estimated at 70.
- Thaao, the Andean condor died at the age of 80.[39]
- Cookie, a Major Mitchell's Cockatoo resident at Brookfield Zoo, Illinois, USA is the oldest member of his species in captivity, at a verified age of 91.
- A female Laysan Albatross named Wisdom successfully hatched a chick at Midway Atoll in February 2013, at the age of 62.[40]
- The oldest living horse on record was a miniature horse affected by dwarfism named Angel who lived with the Horse Protection Society of North Carolina and lived to be over 50.[41]
- Creme Puff, a cat owned by Jake Perry of Austin, Texas, lived from 1967 to 2005 - a total of 38 years and 3 days.[42]
Aquatic animals
- Turritopsis nutricula, the immortal jellyfish, is known to be the longest-living creature which could live on forever without dying of old age.[3] Most may be aged a few hundred years, as they still can be killed.
- Some species of sponges in the ocean near Antarctica are thought to be 10,000 years old.[43]
- Specimens of the black coral genus Leiopathes are among the oldest continuously living organisms on the planet: around 4,265 years old.[44]
- The giant barrel sponge Xestospongia muta is one of the longest-lived animals, with the largest specimens in the Caribbean estimated to be in excess of 2,300 years.[45]
- The black coral Antipatharia in the Gulf of Mexico may live more than 2000 years.[46]
- The Antarctic sponge Cinachyra antarctica has an extremely slow growth rate in the low temperatures of the Southern Ocean. One specimen has been estimated to be 1,550 years old.[47]
- A specimen of the Icelandic Cyprine Arctica islandica (also known as an ocean quahog), a mollusk, was found to have lived 507 years .[48] Another specimen had a recorded life span of 374 years.[49]
- Some koi fish have reportedly lived more than 200 years, the oldest being Hanako, who died at an age of 226 years on July 7, 1977.[50]
- Orange roughy, also known as Deep Sea Perch, lives as long as 149 or 156 years.
- Some confirmed sources estimated Bowhead Whales to have lived at least to 211 years of age, making them the oldest mammals.[51]
- In recent times, the Russian malacologist Valeriy Zyuganov received worldwide reputation after he determined the maximum lifespan (210–250 years) in the freshwater pearl mussel (Margaritifera margaritifera).[52][53] The data of V.V. Zyuganov have been confirmed by Finnish malacologists[54] and gained general acceptance.
- Specimens of the Red Sea Urchin, Strongylocentrotus franciscanus, have been found to be over 200 years old.[55]
- The deep-sea hydrocarbon seep tubeworm Lamellibrachia luymesi (Annelida, Polychaeta) lives for more than 170 years.[56]
- Timothy, a Greek Tortoise, died at an age of 160 years in April 2004.[57]
- Tardigrades, capable of cryptobiosis, have been shown to survive nearly 120 years in a dry state.[58]
- Geoduck, a species of saltwater clam native to the Puget Sound, have been known to live more than 160 years.[59][60]
- George the lobster was estimated to be approximately 140 years old by PETA in January 2009.[61]
- In 2012, a sturgeon was caught in a Wisconsin river that was estimated to be 125 years old.[62]
- An orca of the "Southern Resident Community" identified as J-2 or Granny is estimated to be the oldest orca in the entire community and is 101 years old, as of 2012.
See also
- Biological immortality
- Immortality
- Largest organism
- List of oldest dogs
- List of oldest trees
- Lists of organisms by population
- Longevity
- Maximum life span
- Oldest people and List of oldest people
- Regeneration
References
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Sacred lotus (Nelumbo nucifera) has been cultivated as a crop in Asia for thousands of years. An ~1300-yr-old lotus fruit, recovered from an originally cultivated but now dry lakebed in northeastern China, is the oldest germinated and directly 14C-dated fruit known. In 1996, we traveled to the dry lake at Xipaozi Village, China, the source of the old viable fruits.
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