Rationale-The yellowfin tuna (Thunnus albacares) is a species of tuna found in pelagic waters of tropical and subtropical oceans worldwide. The yellowfin tuna is among one of the the larger tuna species, reaching weights up to around180 kg (400 lb) which is massive, but is significantly smaller than the Atlantic and Pacific bluefin tunas, which can reach around450 kg in weight and slightly smaller than the bigeye tuna and the southern bluefin tuna. The yellow fin tuna grows up to 2.1 metres in length and lives up to the ages of seven. They live up to 250 metres in depth of the ocean which are capable of them eating squid and other pelagic crustaceans. They are able of diving to considerable depths of like up to 200 metres down. An individual tuna in the oceans spends most its time swimming and hunting in depths of 75m to the surface. Their body shape is made for speed chasing after other predators to eat like flying fish and even makeral. Yellowfin grow quick with a life span of only six to seven years of living which is a short life. They begin to reproduce little baby tunas when they reach the age of approximately two. The species is very productive, spawning throughout the year and Females can spawn almost daily, releasing millions of eggs each time and about 8 million in total. Their most productive spawning periods are in the spring and fall. Females release their eggs near the surface of the ocean where they are able to be fertilized and be ready to spawn and not eaten. Baby yellowfin stay close to the surface of the water away from predators, but move into deeper water as they mature and grow bigger so they can start to hunt . They are also known to meet up around areas like anchored buoys, whales and other large marine mammals. They are at the top of the food chain biggest predator of sea in the fish category and feed on other fish, squid and crustaceans. Climate change, pollution, and overfishing are all taking a heavy place on our fisheries and our planet. Climate change is affecting the ocean on many levels. These changes influence everything from droughts and floods to marine life and ocean currents creating the habitats to get destroyed. Pollution has destroyed entire aquatic habitats and left us with giant patches of floating debris all over our oceans which sea creatures eat or just get sick from it and die. Overfishing leaves us with destroyed ecosystems, nutrient-lacking species like unhealthy fish, and a lack of biodiversity in our very sophisticated food web. By catch is either catching to many fish or baby species and trawling and longlining is what mainly causes this as long lines just hook and kill babies and trawling they don’t even throw the babies back.
Evidence-In 2014-2015 there was 2200 tones of yellow fin tuna caught which is sustainable. Tuna is used for humans to eat not for bait to catch other fish etc. Catching up to 5000 tones is bad as it is overfished. The yellowfin tuna lives up to 7 years of age and grow up to around 2 metres in length but are commonly caught at around 90cm and mostly weigh at around 100 kg and on the other hand full grown tuna weigh up to about 200 kg. the tuna can reproduce up to 8 mill eggs a day which means there are lots of them swimming around causing them to be sustainable. Yellow fin tuna are classified as near threatened and a threat to them is that people ae doing lots overfishing the little fish such as pilchards causing the yellow fin tuna not be able to eat them causing them not to be able to grow big. There found throughout the Pacific Indian and Atlantic oceans where they form big schools with other tuna such as skipjack and big eyes to create them to become less hunted.
Conclusions- The yellow fin tuna is sustainable as they are caught frequently but reproduce really quick like they reproduce as the age of 2 and produce up to 8 million eggs which is pretty impressive and that also means there is an increase in the yellow fin tuna. It is good as the fishermen catch some and then they reproduce quickly which means that there is more tuna to be caught and more for us to eat. Yellow fin tuna are also warm bodied animals. Yellowfin Tuna are one of the most popular of the Tuna family, very important to commercial fisheries worldwide. They are marine dwelling, migratory fish found mainly in tropical and warm temperate waters. They are caught in waters Australia-wide by drifting long-lines. They are usually caught at 50-80kg and 1m in length.
Evaluation-Yes, I believe I is true as I support my claim as it actually should continue in the future as tuna fishing is a fun thing to do and there also a good eating product. My opinion of the overall state of the yellow fin tuna is that it is a good fish as they reproduce quickly at the age of two and up to 8 million and some can even do 10 million eggs a day/season. The thing to be done in the future to keep these tuna sustainable is to make it that you can only take a few otherwise known as bag limits and that they are only aloud to fish for these yellow fin tunas at certain times such as non breeding season so they can breed and not take home babies so then they can grow up big and strong and be able to reproduce.