Bluefin Tuna

Biology Coursework-The jack mackerel tunny 1.1a: The difficulty The once plenteous northerly bluefin tunny (Thunnus Thynnus), which lives throughout the Atlantic oceanic and the Mediterranean Sea, is plunging in a free fall towards out(p)ion. The Northern bluefin tuna Tuna tribe has a muffled growth rate and similarly a late informal maturity. horse mackerel larvae have a 1 in 40 million chance of stint adulthood, an extremely low payoff for an endangered species. The Bluefin maturate around eight days old, and ar then commensurate to reproduce; because of this, the Bluefin community is not growing at a fast sufficient 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 intromission of one of the worlds most moneymaking(a) technical fisheries. Medium-sized and large individuals are h eavily targeted 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 oddment 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 around 210,000 tonnes in 1995 to a mere 70,000 tonnes in 2007. The primary conundrum with the decline of Bluefin Tuna stocks is that the drastic effect it give have on the eco! system. Bluefin Tuna are towards the snarf 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 monolithic food shortage. The Bluefin population has decreased by a devastating 90% since 1970 (2). With its large size and high tonicity meat, the Northern Bluefin Tuna is a...If you want to get a full essay, pitch it on our website: BestEssayCheap.com

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