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| − | {{Taxobox
| + | <noinclude><translate><!--T:1--> |
| − | | name = Shortfin mako shark
| + | </noinclude> |
| − | | status = VU
| + | {{species id |
| − | | status_system = iucn3.1
| + | |common_name=Shortfin Mako |
| − | | status_ref =<ref>{{cite press release |title=More oceanic sharks added to the IUCN Red List |publisher=[[IUCN]] |date=2007-02-22 |url=http://www.iucn.org/en/news/archive/2007/02/22_pr_sharks.htm |format= |language= |accessdate=2007-02-25 |quote=The global threat status was heightened for shortfin mako, a favorite shark among commercial and recreational fishermen, from ''Near Threatened'' in 2000 to ''Vulnerable'' today.}}</ref>
| + | |latin_name=Isurus oxyrinchus |
| − | | image = Shortfin mako shark.jpg | + | |image=Isurus oxyrinchus by mark conlin2.JPG |
| − | | regnum = [[Animal]]ia | + | |description= |
| − | | phylum = [[Chordate|Chordata]] | + | The 'Shortfin Mako Shark (''Isurus oxyrinchus''—meaning "sharp nose") is a large mackerel shark. It is commonly referred to as the ''mako shark'' together with the longfin mako shark (''Isurus paucus''). |
| − | | classis = [[Chondrichthyes]] | |
| − | | subclassis = [[Elasmobranchii]]
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| − | | ordo = [[Lamniformes]]
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| − | | familia = [[Lamnidae]]
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| − | | genus = ''[[Isurus]]''
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| − | | species = '''''I. oxyrinchus'''''
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| − | | range_map = Isurus oxyrinchus distmap.png
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| − | | range_map_width = 250px
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| − | | range_map_caption = Range of shortfin mako shark (in blue)
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| − | | binomial = ''Isurus oxyrinchus''
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| − | | binomial_authority = [[Constantine Samuel Rafinesque-Schmaltz|Rafinesque]], 1810
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| − | }}
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| − | {{Sharksportal}}
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| − | The '''shortfin mako shark''', ''Isurus oxyrinchus'' ("sharp nose"), is a large [[shark]] of the [[Lamnidae]] family. Along with the closely related [[longfin mako]], ''Isurus paucus'', it is commonly called just '''mako shark'''.
| + | <!--T:2--> |
| − | ==Anatomy and appearance==
| + | The Shortfin Mako is a fairly large species of shark. An average adult specimen will measure around 3.2 meters in length and weigh from 60-135 kg. Females are larger than males. The largest "mako" taken (not verified between the two species) on hook-and-line was 505.8 kg. |
| − | <!-- Commented out because image was deleted: [[Image:Mako shark overview.jpg|left|thumb|A shortfin mako shark.]] --> | |
| − | This species has an average full-grown length of 1.82–2.8 m (6–9.2 ft)<ref><http://www.sdnhm.org/kids/sharks/shore-to-sea/mako.html></ref><ref><http://animaldiversity.ummz.umich.edu/site/accounts/information/Isurus_oxyrinchus.html></ref> and weight of approximately 200 kg (440 lb). The largest reported mako was said to be 1,000 kg (2,200 lb) and 4 m (13.2 ft), although the largest confirmed size is 3.96 m (13 ft) and 794 kg (1,750 lb).<ref>[http://homepage.mac.com/mollet/Io/Io_large.html large shortfin makos<!-- Bot generated title -->]</ref> It has a bluish back and white underside. Although the sexes grow at about the same rate, females are thought to have a longer [[life span]], and grow larger and weigh more than the males. Shortfin makos are renowned for their speed and their ability to leap out of the water. In fact, there are cases when an angry mako will jump out of the water and into the boat after it has been caught on the hook. Mako sharks have a better hydrodynamic shape than all other sharks, and this, combined with the lamnidae's typical high aerobic muscle mass, reflects in the spectacular speed and agility of both the longfin and shortfin makos.
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| − | The shortfin mako shark is a sleek spindle shaped shark with a long conical snout. This shark has short [[pectoral fin]]s and a crescent shaped [[caudal fin|caudal (tail) fin]]. There is a distinct caudal keel on the caudal base. Its second [[dorsal fin]] is much smaller than the first. The teeth are slender and are curved with no lateral cusps and are visible even when the mouth is closed. There is marked countershading on this shark; dorsally it is a metallic indigo blue while ventrally it is white.<ref name="GG"/> | + | <!--T:3--> |
| | + | The Shortfin Mako is cylindrical in shape, with a vertically-elongated tail that assists its highly hydrodynamic lifestyle. The Mako is in fact the fastest shark of all. This species' color is brilliant metallic blue dorsally and white ventrally, although coloration varies as the shark ages and increases in size. The line of demarcation between blue and white on the body is distinct. The underside of the snout and the area around the mouth are white. Larger specimens tend to possess darker color that extends onto parts of the body that are white in smaller individuals. The juvenile mako differs in that it has a clear blackish stain on the tip of the snout. The Longfin mako shark very much resembles the Shortfin, but has larger pectoral fins, dark rather than pale coloration around the mouth and larger eyes. The presence of only one lateral keel on the tail and the lack of lateral cusps on the teeth distinguish the makos from the closely related porbeagle sharks of the genus ''Lamna''. [https://www.youtube.com/watch?v=yhHDXk8g4FE Mako surprises diver] |
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| − | ==Naming==
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| − | The name "mako" comes from the [[Māori language]],<ref>{{cite web|url=http://www.maori.info/maori_language.htm|title=Maori language - a glossary of useful words from the language of the Maori New Zealand|accessdate=2006-08-11}}</ref> meaning either the mako shark or a shark tooth. It may simply have originated from a dialectal variation as it is similar to the common words for shark in a number of [[Polynesian languages]] - ''makō'' in the [[Ngai Tahu|Kāi Tahu]] Māori dialect,<ref name="DMaori">{{cite book|title=Dictionary of the Maori Language|author=H.W.Williams|edition=7th|date=1971}}</ref> ''mangō'' in other Māori dialects,<ref name="DMaori"/> ''ma'o'' in [[Tahitian language|Tahitian]], and ''mano'' in [[Hawaiian language|Hawaiian]]. The first written usage is in [[Samuel Lee|Lee]] & [[Thomas Kendall|Kendall's]] ''Grammar and vocabulary of the language of New Zealand'' (1820), which simply states "Máko; A certain fish".<ref>{{cite book|title=Oxford: The Dictionary of New Zealand English: New Zealand words and their origins|date=1997}}</ref><ref>{{cite web|url=http://www.etymonline.com/index.php?term=mako|title=Online Etymology Dictionary|accessdate=2008-03-08}}</ref> [[Richard Taylor (missionary)|Richard Taylor's]] ''A leaf from the natural history of New Zealand'' (1848) is more elaborate: "Mako, the shark which has the tooth so highly prized by the Maoris".<ref>{{cite book|title=A leaf from the natural history of New Zealand|author=Richard Taylor|date=1848|page=xiii|nopp=true}}</ref>
| + | |range= |
| − | <!-- the 1727 reference that appears in the Oxford English Dictionary and others is a misinterpretation of the Japanese word "makko" (sperm whale)--> | + | The shortfin mako inhabits offshore temperate and tropical seas worldwide. The closely related longfin mako shark, ''Isurus paucus'', is found in the Gulf Stream or warmer offshore waters. |
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| − | ==Diet==
| + | <noinclude></translate></noinclude> |
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| − | [[Image:Close up of mako shark head 005.jpg|right|thumb|A close-up of a shortfin mako shark's head.]]
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| − | The shortfin mako feeds mainly upon bony fishes including mackerels, tunas, bonitos, [[swordfish]], and [[sailfish]], but it may also eat other sharks, porpoises, sea turtles, and herons. In Ganzirri and Isola Lipari, [[Sicily]], shortfin makos have been found with amputated swordfish bills impaled into their head and gills, suggesting makos are making the swordfish a major food source during late spring and early summer, corresponding to the swordfish's spawning cycle. This shark, like others, has a natural predatory instinct to attack prey while they are most vulnerable.<ref name="SG">{{cite web |url=http://sharks-med.netfirms.com/med/mako.htm |title=The Shark Gallery - Shortfin Mako Shark (Isurus oxyrinchus) |publisher="The [[Shark Trust]]"| |accessdate=2008-10-02}}</ref>
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| − | An analysis of the stomach contents of 399 male and female mako sharks ranging from 67 to 328cm suggest makos from Cape Hatteras to the Grand Banks prefer bluefish to any other food source. In the study, Bluefish constituted 77.5% of the diet by volume. The average capacity of the stomach was 10% of the body weight. Shortfin makos consumed 4.3 to 14.5% of the available bluefish between Cape Hatteras and Georges Bank. <ref> {{cite journal|title=Food, Feeding Habits, and Estimates of Daily Ration of the Shortfin Mako (Isurus oxyrinchus ) in the Northwest Atlantic.|journal=Canadian Journal of Fisheries and Aquatic Sciences|date=1982|first=|last=|coauthors=|volume=Vol. 39|issue= no. 3|pages=pp. 407-414.|id= |url=http://md1.csa.com/partners/viewrecord.php?requester=gs&collection=ENV&recid=226343&q=Shortfin+mako&uid=793124504&setcookie=yes|format=|accessdate=2008-11-04 }}</ref>
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| − | Shortfin makos over 3m (10 ft.) have been found to have anterior teeth considerably wider and flatter than smaller makos, which enables them to prey effectively upon dolphins, swordfish, and other sharks. <ref name="SS">{{cite news | first= Martin | last= R. Aidan. | coauthors= | title=Open Ocean: the Blue DesertShortfin Mako | date=2003 | publisher=ReefQuest Centre for Shark Research | url =http://www.elasmo-research.org/education/ecology/ocean-mako.htm | work = | pages = | accessdate = 2008-11-14 | language = }}</ref>
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| − | In recent years it has been suggested that adult makos infrequently attack free-swimming dolphins. This hypothesis appeared validated when an amateur video, taken in Pacific waters, emerged, showing a moribund spotted dolphin whose tail was almost completely severed, just after a shark attack. The video shows a very large shortfin mako circling the dying dolphin. Makos also have the tendency to scavenge on long-lined and netted fish. <ref>{{cite news | first=Ian | last=Fergusson | coauthors= | title=Shortfin Mako Shark (Isurus oxyrinchus) | date= | publisher= | url =http://dspace.dial.pipex.com/sharktrust/mako.shtml | work = | pages = | accessdate = 2008-11-18 | language = }}</ref>
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| − | ==Distribution==
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| − | [[Image:Isurus-oxyrinchus.jpg|right|thumb|]]
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| − | The shortfin mako is found in offshore temperate and [[tropical]] seas worldwide. The closely related [[longfin mako shark]], ''Isurus paucus'', is found in the [[Gulf Stream]] or warmer offshore waters. | |
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| − | It is a [[pelagic]] species that can be found from the surface down to depths of 150 m (490 ft.). The shortfin mako is found in blue waters, normally far from land though occasionally closer to shore, particularly around islands or inlets.<ref name="SG"/> One of only four known exothermic sharks, it is seldom found in waters colder than 16° [[Celsius|C]] (61° [[Fahrenheit|F]]). <ref>{{cite news | title= Shortfin Mako (Isurus oxyrinchus) | date=05/08/29 | publisher=Shark Foundation / Hai-Stiftung | url =http://www.shark.ch/Database/Search/species.html?sh_id=1027 | accessdate = 2008-11-18 | language = }}</ref>
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| − | In the western [[Atlantic]] it can be found from [[Argentina]] and the [[Gulf of Mexico]] to Browns Bank off of [[Nova Scotia]]. In [[Canada|Canadian]] waters these sharks are not abundant as they prefer warm waters, but neither are they rare. Shortfin makos are often found in the same waters as swordfish as they are a source of food and both fish prefer similar environmental conditions.<ref>{{cite news | first=Steven | last=Campana | coauthors= Warren Joyce,Zoey Zahorodny | title=Shortfin Mako | date=2 October 2008 | publisher=The Canadian Shark Research Laboratory | url =http://www.marinebiodiversity.ca/shark/english/skull6.htm | work = | pages = | accessdate = 2008-11-16 | language = }}</ref>
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| − | It is suggested shortfin makos travel long distances to seek adequate prey or fitting mates. In December 1998, a female shortfin mako tagged off California was captured in the central Pacific by a Japanese research vessel, meaning this fish traveled over 1,725 miles (2,780 kilometers).<ref name="SS"/>
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| − | == Behaviour ==
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| − | The shortfin mako's speed has been recorded at 50km/h (31 mph), and there are reports that it can achieve bursts of up to 74km/h (46mph).<ref>{{cite web|url=http://www.elasmo-research.org/education/shark_profiles/i_oxyrinchus.htm|title=Biology of the Shortfin Mako|publisher=ReefQuest Centre for Shark Research|accessdate=2006-08-12|author=R. Aidan Martin}}</ref> It can jump up to 9m (28ft.) in the air. Due to its speed and agility, this high-leaping fish is sought as [[Game (food)|game]] worldwide. This shark is highly migratory. Its exothermic constitution partly accounts for its relatively great speed.<ref name="MK">{{cite news | first=Nancy | last=Passarelli | coauthors= Craig Knickle and Kristy DiVittorio | title=SHORTFIN MAKO | date= | publisher=Florida Museum of Natural History | url =http://www.flmnh.ufl.edu/fish/Gallery/Descript/ShortfinMako/Shortfinmako.html | work = | pages = | accessdate = 2008-10-06 | language = }}</ref>
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| − | There is still some uncertainty about its lifespan, but it is suspected to reach ages of between 11 to 23 years.
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| − | The shortfin's aggressive behavior could be responsible for attacks on humans, but humans cause much more harm because the demand for the meat of this fish is so high. Like other lamnid sharks, the shortfin mako has a heat exchange circulatory system that allows the shark to be seven to ten degrees warmer than the surrounding water. This system enables the shortfin to maintain a high level of activity.<ref name="GG">{{cite news | first=M. McGrouther | title=Shortfin Mako | date=May 2007 | publisher=Australian Museum | url =http://www.australianmuseum.net.au/fishes/fishfacts/fish/ioxyrinchus.htm | accessdate = 2008-11-15 }}</ref> This could be the reason for their great hunting abilities. The higher body temperature give the sharks an advantage over its cold-blooded prey.<ref>{{cite news | first= | last= | coauthors= | title=Shortfin Mako Shark | date=Tuesday, October 30, 2007 | publisher=2008 Discovery Communications, LLC | url =http://dsc.discovery.com/sharks/shortfin-mako-shark.html | work = | pages = | accessdate = 2008-11-04 | language = }}</ref>
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| − | ==Reproduction==
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| − | The shortfin mako shark is a yolk-sac [[Ovoviviparity|ovoviviparous]] shark, meaning it gives birth to live young who feed from a sac full of yolk in the womb. The gestation period for a mako shark is 15 to 18 months. Shortfin mako embryos in the female's body consume each other to get nutrients. This is called [[intrauterine cannibalism]].
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| − | Female shortfin makos usually become sexually mature at a length of 3 m. Developing embryos feed on unfertilized eggs in the uterus during the gestation period of 15 to 18 months. The 4 to 18 surviving young are born live in the late winter and early spring at a length of about 70 cm, but have no placental connection during development (ovoviviparity). It is believed that females may rest for 18 months after birth before the next batch of eggs are fertilized.
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| − | Male shortfin makos reach sexual maturity within 4 years.
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| − | One study conducted by NOAA in 1997, showed times at liberty ranged from 13 days to 12.8 years. This phenomenal 12.8 year recapture was in 1997 the longest time at liberty for any mako. Along with the shark itself a piece of the backbone was collected to confirm the age estimates. The recapture of this shark proved that shortfin makos can in fact live at least 13 years. This information can in turn be used to better manage the species. <ref name='WW'>{{cite news | first= | last= | coauthors= | title=1997 OVERVIEW | date=December 9, 2004 | publisher=Apex Predators Program | url =http://na.nefsc.noaa.gov/sharks/newsletter/97/97overview.html | work = | pages = | accessdate = 2008-11-16 | language = }}</ref>
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| − | ==Distinguishing characteristics==
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| − | * Teeth are visible even when the mouth is closed
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| − | * Teeth are long and slender with smooth-edged cusps
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| − | * Distinct countershading, dorsally blue and ventrally white
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| − | * Moderately short pectoral fins
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| − | * Underside of the snout is white<ref name="MK"/>
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| − | ==Captivity==
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| − | Of all recorded attempts to keep [[pelagic]] shark species in captivity, the Mako has fared the poorest; even more so than the [[oceanic whitetip shark]], the [[blue shark]] and the [[great white shark]]. The current record is held by a specimen that, in 2001, was kept at the New Jersey Aquarium for only five days. Like past attempts at keeping ''Isurus'' in captivity, the animal appeared strong upon arrival but had trouble negotiating the walls of the aquarium, refused to feed, quickly weakened and expired.<ref>[http://homepage.mac.com/mollet/ Elasmobranch Research around Monterey Bay<!-- Bot generated title -->]</ref>
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| − | ==Attacks on humans==
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| − | The shortfin mako does have a formidable and foreboding appearance. The [[International Shark Attack File|ISAF]] statistics on attacking species of sharks purports that between 1580 and 2007, the shortfin mako has had eight unprovoked [[Shark attack|attacks]] on humans with two ending in fatality and twenty [[boat]] attacks.<ref>[http://www.flmnh.ufl.edu/fish/sharks/statistics/species2.htm ISAF Statistics on Attacking Species of Shark<!-- Bot generated title -->]</ref>
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| − | ==Short fin mako sharks in popular culture==
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| − | * A mako shark appeared in Ernest Hemmingway's novella, ''The Old Man and The Sea''
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| − | == Notes ==
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| − | {{reflist|2}}
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| − | == References ==
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| − | {{wikispecies|Isurus oxyrinchus}}
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| − | * {{IUCN2006|assessors=Stevens|year=2000|id=39341|title=Isurus oxyrinchus|downloaded=6 May 2006}} Database entry includes justification for why this species is near threatened
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| − | * {{ITIS|ID=159924|taxon=Isurus oxyrinchus|year=2006|date=23 January}}
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| − | * {{FishBase species | genus = Isurus | species = oxyrinchus | month = May | year = 2006}}
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| − | ==External links==
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| − | * ARKive - [http://www.arkive.org/species/GES/fish/Isurus_oxyrinchus/ images and movies of the shortfin mako ''(Isurus oxyrinchus)'']
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| − | * [http://www.snopes.com/photos/animals/yarmouth.asp CANADA: Record Mako Shark Caught]
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| − | * {{marinebio|id369|name=Shortfin mako shark, ''Isurus oxyrinchus''}}
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| − | * [http://www.newscientist.com/article/dn15151-why-a-speeding-shark-is-like-a-golf-ball.html?feedId=online-news_rss20 Shortfin mako sharks can shoot through the ocean at up to 50 miles per hour], ''New Scientist'', 7 November 2008
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| − | {{Taxon|type=fish|name=Shortfin mako shark|catlifeid=1280961|biolibid=138648|genus=Isurus|species=oxyrinchus|gbifid=13551319/|iucnid=39341|eolid=17144829}}
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| − | [[Category:Lamnidae]]
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| − | [[Category:Ovoviviparous fish]]
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| − | [[ca:Solraig]]
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| − | [[de:Kurzflossen-Mako]]
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| − | [[es:Isurus oxyrinchus]]
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| − | [[fr:Requin mako]]
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| − | [[ko:청상아리]]
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| − | [[it:Isurus oxyrinchus]]
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| − | [[lt:Mako ryklys]]
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| − | [[nl:Kortvinmakreelhaai]]
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| − | [[ja:アオザメ]]
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| − | [[no:Makrellhai]]
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| − | [[pt:Tubarão-mako]]
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| − | [[sk:Mako rýchly]]
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| − | [[fi:Makohai]]
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| − | [[sv:Makohaj]]
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| − | [[vi:Cá mập mako vây ngắn]]
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| − | [[zh:尖吻鲭鲨]]
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