Aquaculture.ppt

The picture was an alligator. Yes No 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 The largest category currently accepted in our classification system of living organisms is a (an) Order Class Kingdom Phylum domain :25 What about differences between canned tuna? Most canned tuna is labeled as either "albacore" or "chunk light". There are other species of canned tuna, as well. Albacore tuna, according to FDA data, contains 3 times as much mercury as chunk light (0.353 ppm vs. 0.118 ppm). Cans of chunk light tuna usually contain skipjack tuna, which is a smaller species and averages lower mercury levels. However, a Chicago Tribune investigation found that chunk-light canned tuna sometimes contains yellowfin tuna (0.325 ppm), but is not labeled correctly. Also, a study found that troll-caught albacore mercury levels are lower (0.14 ppm vs. 0.353 ppm) because they are younger than longline-caught albacore. Read canned tuna labels carefully to find out which species it contains! You can compare the mercury levels between all types of tuna in the mercury calculator above. Tuna "farms" - a new pressure In the late 1990s came a new development in the bluefin tuna industry: tuna farms. The farms are actually fattening pens for live-caught bluefin tuna, and supply a new market in Japan for cheaper bluefin tuna for sushi and sashimi. Suddenly, the prized bluefin was affordable for nearly all Japanese, not just the wealthy. Demand soared...and so did the fishing effort. This photo of a juvenile bluefin tuna was taken by Rich Ruais in the spring of 2000 just after the ICCAT meeting in Europe. The Europeans declared that the undersize catch had dropped to zero. The bluefin in this photo, bought in Marseilles, France, was 24-inches long, weighed 4-pounds. and was one of many regularly available in the markets. The minimum weight is 15 pounds, American fishermen who have sought European compliance with regulations on highly migratory species have concluded the European community simply lies about compliance and gets away with it. Photo: Rich Ruais Bluefin tuna quotas doubled By Charles Clover Last Updated: 12:01am BST 11/June/2007 EU ministers have voted to allow fishing for critically endangered bluefin tuna in the Mediterranean and Eastern Atlantic at twice the level which scientists say will lead to the collapse of stocks.  Critically endangered: quotas are to be doubled though the tuna population is in danger of collapse Britain and Ireland both registered a protest vote against the decision which the conservation group, WWF, described as a "scandal" which would "undermine the Common Fisheries Policy in the eyes of the world." Ben Bradshaw, the British fisheries minister, said the decision was "not tough enough." He said Britain and Ireland were unhappy that EU rules that require any overfished stock to be paid back in future years were not to be implemented against France and Italy who are estimated to have overfished their quotas by up to 30 per cent in the past two years. These rules, he said, were being implemented against British and Irish fishermen for overfishing mackerel which are not under threat??.. FDA Thursday, November 23, 2006 Orange Roughy on the endangered list Press release: "The Orange roughy fish species will be added to the threatened species list under Australian environment law, the Australian Minister for the Environment & Heritage, Senator Ian Campbell, has announced" ..?? The EPA reference dose (RfD) is defined as the amount of mercury a person, including sensitive subpopulations, can be exposed to on a daily basis over a lifetime without appreciable risk of effects. The EPA RfD is 0.1 µg mercury per kg body weight per day. When using the mercury calculator at GotMercury.Org, this value (adjusted for a week of exposure) is the value to which your mercury levels are being compared. This level corresponds to a blood mercury level of 5.8 ug/L or 5.8 parts per billion (ppb) mercury. Blood mercury levels below this value are considered to be without appreciable risk by the EPA. For hair, the mercury level that corresponds to the RfD is 1 part per million (ppm).