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The bluefin tuna. By Zach Yates. R elations. What the bluefins closest relatives are…. Kingdom Phylum etc……………………. Kingdom ( animilia ) Phylum ( chordata ) Class ( actinopterygii ) Order ( perciformes ) Family ( scombridae ) Genus ( Thunnus ) - PowerPoint PPT Presentation
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Kingdom Phylum etc……………………..Kingdom ( animilia )Phylum ( chordata )Class ( actinopterygii )Order ( perciformes )Family ( scombridae )Genus ( Thunnus )Species (maccoyii ) ( orentalis ), or ( thynus ).There are many types of tuna, even three
types of bluefin tuna. They are on the next slide.
Types of bluefin1) The Pacific bluefin ( Thunnus orentalis )
(above )
2) The Atlantic bluefin ( Thunnus thynus )
3) The Southern bluefin ( Thunnus maccoyii ) (below)
Physical characteristicsThere is no difference between the three
types of bluefin, nor male and female, but here are some of their characteristics.
Caudal - the part of the tuna that connects its tailfin to its body.
DistributionThe bluefin tuna is distributed all over the
world with more than 80,000 tons being brought to fish markets every year.
Conservation statusThe pacific bluefin (Thunnus orentalis ) is of
least concern and increasing, while the other species however are not doing well at all.
The southern bluefin ( Thunnus maccoyii ) is the most endangered of all three bluefin tuna. It is critically endangered and decreasing.
The Atlantic bluefin ( Thunnus thynus ) is also endangered and decreasing, but not as much as the southern bluefin.
Reproductive characteristicsThe bluefin tuna spawns when they are
around seven to ten years old.They gather in big packs of 200 to 300 tuna to spawn.
They lay about 3 million eggs a year, but only 1% of those eggs survive due to natural preditors.
Parental careThe bluefin tuna leaves its eggs right after it
lays them.Neither parents take care of the eggs.
Longevity and mortalityThe bluefin tuna lives up to 15 years in the
wild ( although the record is up to 50 years ).Bluefin tuna do not die of old age in captivity,
they are usually slaughtered, frozen, and sent to fish markets for a decent pay.
Predator relationships
The bluefin tuna’s predators are mostly sharks and people.
The sharks pose no threat to the tuna though.
Human relationshipsHumans pose the biggest threat to the
bluefin tuna, over fishing and caging have brought this fish down to less than 50% of what it used to be in the 1950’s.
Fun facts!!!!!!Did you know…….
Mitsubishi owns more than half of the bluefin fishing companies.
The bluefin can cross the Atlantic ocean in less than 60 days.
they have 2 types of muscle for cruising and having long darts of speed to catch prey.
They are warm blooded.They can obtain a speed of 45 mph.The bluefin tuna has the longest migration of any
animal on the planet.
Works citedwww.plosone.orgwww.arkive.orgwww.iucnredlist.org/www.sciencedirect.comwww.gtopp.org
Video
http://www.youtube.com/watch?v=yT1EL9kpel4