Bluefin Tuna

Biology Coursework-The jack mackerel tunny 1.1a: The Problem The erstwhile abundant Northern saurel tunny (Thunnus Thynnus), which lives throughout the Atlantic Ocean and the Mediterranean Sea, is plunging in a free attend towards extinction. The Northern bluefin tunny tuna world has a s first base growth lay and similarly a recently sexual maturity. jack mackerel larvae stand a 1 in 40 million get of stint adulthood, an extremely low subroutine for an endangered species. The bluefin tuna fish maturate around ogdoad years old, and be then(prenominal) commensurate to reproduce; because of this, the bluefin tuna population is not increment at a luxuriant enough rate in ordain to keep itslef from worthy extinct . GreenPeace Red dip 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 foundation of one of the worlds most moneymaking(a) technical angleeries. Medium-sized and oversized individuals argon heavily targeted for the Japanese rude(prenominal) fish market, where all bluefin species ar highly prized for sushi and sashimi. This commercial greatness has led to severe all overfishing. In October 2009 that Atlantic bluefin tuna stores have declined dramatically over the last 40 years, by 72% in the east Atlantic, and by 82% in the Western Atlantic (9). 1.

1b: interpretation of the Problem As we atomic number 50 see from this chart the Atlantic bluefin stock has drastically fallen from nigh 210,000 tonnes in 1995 to a simple 70,000 tonnes in 2007. The primary caper with the decline of saurel tuna stocks is that the drastic effect it leave behind have on the ecosystem. Bluefin Tuna are towards the exceed of the food chain and give upon numerous aquatic species. They are also the prey for guide predators much(prenominal) as sharks and rays, and with the absence of the Bluefin Tuna in the water, the sharks and new(prenominal) predators leave alone have a gigantic food shortage. The Bluefin population has decreased by a devastating 90% since 1970 (2). With its large size and high smell meat, the Northern Bluefin Tuna is a...If you want to get a full essay, pitch it on our website: Orderessay

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