Bluefin Tuna

Biology Coursework-The jack mackerel tunny 1.1a: The task The once vast Yankee bluefin tunny (Thunnus Thynnus), which lives throughout the Atlantic naval and the Mediterranean Sea, is plunging in a free fall towards nonextantion. The Northern bluefin tuna Tuna macrocosm has a lento growth rate and similarly a late knowledgeable maturity. horse mackerel larvae have a 1 in 40 million chance of stint adulthood, an extremely low make sense for an endangered species. The Bluefin maturate around eight eld old, and argon then commensurate to reproduce; because of this, the Bluefin universe is not growing at a fast exuberant rate in ordain to keep itslef from becoming extinct . GreenPeace Red List lists the jack mackerel as critically endangered, and its population has declined by 92% since the 1950s. (1) The Atlantic bluefin tuna has been the buns of one of the worlds most moneymaking(a) technical fisheries. Medium-sized and large individuals are firmly targ eted for the Japanese rude(prenominal) fish market, where all bluefin species are highly prized for sushi and sashimi. This commercial importance has led to severe overfishing. In October 2009 that Atlantic bluefin tuna stocks have declined dramatically over the polish 40 years, by 72% in the Eastern Atlantic, and by 82% in the Western Atlantic (9). 1.

1b: Description of the Problem As we atomic number 50 see from this graphical record the Atlantic bluefin stock has drastically fallen from astir(predicate) 210,000 tonnes in 1995 to a mere 70,000 tonnes in 2007. The primary riddle with the decline of Bluefin Tuna stoc ks is that the drastic effect it allow have! on the ecosystem. Bluefin Tuna are towards the communicate of the food chain and prey upon numerous aquatic species. They are also the prey for top predators much(prenominal) as sharks and rays, and with the absence of the Bluefin Tuna in the water, the sharks and new(prenominal) predators will have a huge food shortage. The Bluefin population has decreased by a devastating 90% since 1970 (2). With its large size and high prize meat, the Northern Bluefin Tuna is a...If you want to get a full essay, pitch it on our website: OrderCustomPaper.com

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