Carbohydrates are good. If you feel you have lost your way, do not forge ahead but rather return along Watch the weather - don't push on in bad weather. the exact meeting point of the Atlantic and the Indian Ocean off the southern tip of Africa. constantly mix and mingle, creating a wide variety of weather and sea life. Indian Ocean meets on the west of Cape Agulhas in 20° longitude East with Atlantic But the water body interact and mix due to the agitation due to the wind , wave While it does not seem apparent to us, we are all living, in a sense, on huge. Omega-3s are today's darling of the nutrition world, and many Rather, the problem is that most of us don't include enough variety of protein sources in our diet. We eat a lot of poultry and red meat but not as much seafood, nuts, beans, And canned light tuna caught on a purse seine in the Indian Ocean?.
Fish sticks are a popular choice but likely do not have a lot of omega-3s in them. Mercury A naturally occurring heavy metal in rock, mercury is released into the environment primarily through human processes, such as the burning of fossil fuels. Mercury makes its way into our waterways and bioaccumulates in the marine food chain. Generally speaking, small fish and shellfish are low in mercury, while the most mercury accumulates in big, long-lived, predator fish, such as king mackerel, marlin, orange roughy, shark, swordfish, ahi or yellowfin tuna and bigeye tuna.
Humans, of course, are also part of that food chain. Consuming mercury is definitely not a good thing. A little bit here and there is probably not going to harm the average adult, but with high exposure, mercury can damage key organs. Fetuses, infants and young children are vulnerable to mercury toxicity, as high exposure can cause serious, irreversible developmental and neurological damage.
There are three categories — Best Choices, Good Choices and Choices to Avoid, and while most types of seafood clearly fall in just one category, some classifications are species-specific. Tuna shows up in all three categories: For optimizing the health benefits, the best seafood choices are those high in omega-3s and low in mercury. ChooseMyPlate lists several seafood options that fit nicely in both categoriesincluding salmon, trout, oysters, herring and sardines, and Atlantic and Pacific mackerel.
Sustainability There is also the issue of sustainability. Get to know a fishmonger the person who sells the fish at the store, so you can have a trusted resource from whom you can purchase your fish with confidence.
Fresh whole tuna should be displayed buried in ice, while fillets and steaks should be placed on top of the ice. Try to avoid purchasing tuna that has dry or brown spots. Smell is a good indicator of freshness. Since a slightly "off" smell cannot be detected through plastic, if you have the option, purchase displayed fish as opposed to pieces that are prepackaged.
Once the fishmonger wraps and hands you the fish that you have selected, smell it through the paper wrapping and return it if it has a truly strong fishy odor. Canned tuna is available either solid or in chunks, and is packaged in oil, broth or water. Although the tuna packed in oil is usually the moistest, it also has the highest fat content, and the oils in which it is packed are high in omega-6 fats.
Since omega-6s and omega-3s compete for the same enzymes that activate them for use in the body, and most Americans already consume too many omega-6 fats in comparison to omega-3s, it is best to purchase tuna packed in water or broth. Oftentimes, canned tunas do not distinguish which specific species was used except to note that it is either light tuna bluefin or yellowfin or white tuna usually albacore.
Southern Ocean - Wikipedia
One final note about tuna selection: Department of Agriculture National Organic Program has yet to implement organic certification standards for seafood, including tuna.
In the absence of organic certification, you may want to obtain more additional information on salmon than you otherwise might do with certified organic foods, and for this reason, our Individual Concerns section provides you with links to additional websites that provide high-quality and straightforward information about seafood choices including salmon.
When storing all types of fresh seafood, including tuna, it is important to keep them cold since fish spoils quickly and is very sensitive to temperature. Therefore, after purchasing tuna or other fish refrigerate it as soon as possible. If the fish is going to accompany you during a day full of errands, keep a cooler in the car where you can place your tuna to make sure it stays cold and does not spoil.
The temperature of most refrigerators is slightly warmer than ideal for storing fish. To ensure maximum freshness and quality, it is important to use special storage methods to create the optimal temperature for holding the fish. One of the easiest ways to do this is to place fish, which has been well wrapped, in a baking dish filled with ice. The baking dish and fish should then be placed on the bottom shelf of the refrigerator, which is its coolest area.
Replenish the ice one or two times per day. The length of time that tuna can stay fresh stored this way depends upon how fresh it is, i. But in general, about two days is the longest time period that we recommend refrigerating fresh fish on ice.
Want to eat fish that's truly good for you? Here are some guidelines to reeling one in
After two days, we recommend freezing the fish if you will not be cooking it. To freeze, wrap it well in plastic and place it in the coldest part of the freezer where it will keep for up to two or three weeks.
All of these selection and storage steps for tuna are especially important due to special risk of histamine formation in tuna. Adverse reactions to histamine in tuna are often referred to as "scombrotoxic poisoning" since tuna belong to Scombridae family of fish.
Failure to keep fresh tuna well chilled at refrigerator temperatures prior to cooking can result in increased histamine content and greater risk of adverse reaction.
So can improper handling of canned tuna, in which a can is opened and allowed to sit at room temperature after being opened yet not consumed for several hours. The possibility of unwanted histamine formation in tuna makes it especially important for you to use care in the selection and storage of this food.
Tips for Preparing and Cooking Tips for Preparing Tuna After you unwrap your fish, rinse it under cool running water, then pat dry before cooking. This temperature threshold is the minimal safe temperature recommended by the U. The sky's the limit when making tuna salad since so many different ingredients nicely complement tuna's mild flavor.
Some of our favorite tuna salad ingredients include olives, chili peppers, leeks, fennel and walnuts. Try using fresh lemon juice, olive oil, and a little mustard for a healthier way to make a tuna sandwich instead of mayonnaise.
Stovetop Sear a tuna steak and add it to a salad of mixed greens and vegetables. For an Asian-inspired meal with a hot streak, lightly brush a tuna steak with wasabi and soy sauce, and Quick Broil. For some of our favorite recipes, click Recipes. Environmental Protection Agency EPA drafted new joint provisional guidelines for tuna consumption by pregnant women, nursing mothers, and young children.Amazing Facts About Gulf Of Alaska Where 2 Oceans Meet But Dont Mix
These provisional guidelines recommended weekly servings of fish by young children on an age-appropriate and calorie-appropriate basis. Similarly, ounces of fish representing servings per week were recommended for pregnant women and nursing mothers. Simultaneous with this recommendation for regular intake of fish, however, was a recommendation for selection of fish lower in mercury and avoidance of higher mercury fish. With respect to tuna, these provisional guidelines, recommended a limit of 6 ounces of albacore tuna per week for pregnant women and nursing mothers, and preferential selection of light canned tuna when including tuna in weekly fish consumption.
We do not disagree with the logic of the FDA recommendations. Yet, we would also point out that "canned light tuna" may include skipjack, tongol, and yellowfin species and that some yellowfin tuna can be quite high in mercury accumulation.
So as a general rule, "canned light tuna" that specify skipjack or tongol may provide you with lower mercury exposure. We would also point out that canned tuna is not the only form of tuna available in the marketplace, and that fresh tuna including species like skipjack is available as fresh fish option.
Based on all of the research that we have reviewed, we think it makes sense not only for pregnant women, women of childbearing age who might become pregnant, nursing mothers, and young children to limit their consumption of higher mercury fish, but for everyone who wants to include fish within their meal plan.
Accordingly, we do not think it makes sense for you to rely on tuna as a primary seafood source for key nutrients, including omega-3 fats, since all tuna species show some level of mercury contamination in research studies. However, we do think it makes sense for you to treat tuna as a fish that can be enjoyed multiple times per month, especially if you select tuna types with lower mercury risk.
As a general rule, we would include both skipjack and tongol tuna in this lower mercury risk category. In some cases, we would also consider yellowfin to be in the lower mercury risk category, although this species can have widely ranging mercury level due to its widely ranging size and lifestyle.
For many people who want to err on the conservative side, it might make sense to avoid yellowfin tuna altogether if you are unable to determine its status as higher or lower in mercury. Because mercury levels in oceans are continuously changing, and because they can vary so greatly from ocean to ocean and even at different water depths within an individual ocean, levels in fish—including tuna—can sometimes be difficult to predict or even determine.
One resource you can to follow-up on these levels is mercury and fish information provided by the U. If you are making a decision about tuna consumption and have actual mercury data available like the FDA data above, you can generally regard tuna with mercury levels of ppb or less as being "lower" in mercury, and tuna with mercury levels of ppb or more as being "higher" in mercury.
General Environmental Concerns Contamination of ocean waters, overfishing of fish and shellfish species, quality of fish farming practices, potential detrimental effects of certain fishing methods on wildlife, and risk of exposure to fish contaminants especially mercury have become individual concerns for many consumers. These concerns are not limited to tuna, but extend to all seafood.
Luckily, two organizations in the U. We encourage you to make use of the resources provided by both of these organizations. The first organization is the Monterey Bay Seafood Watch www. You can find practical recommendation for 65 different types of fish on their website, as well as Best Choices, Good Alternatives, and Choices to Avoid. You can also download seafood guides specific to your region of the United States and a mobile app providing you with this information.
In comparison with the Monterey Bay Seafood Watch, the FishWatch site is more educational in nature, and is focuses on the providing of information that can be used to make informed seafood choices.
Tuna and Food Allergies Fish, such as tuna, are among the eight food types considered to be major food allergens in the U.
A few icebergs were sighted but there was still no sight of land, leading Weddell to theorize that the sea continued as far as the South Pole. Another two days' sailing would have brought him to Coat's Land to the east of the Weddell Sea but Weddell decided to turn back. A few months later Smith returned to explore the other islands of the South Shetlands archipelago, landed on King George Islandand claimed the new territories for Britain. Parts of her wreckage were found months later by sealers on the north coast of Livingston Island South Shetlands.
It is unknown if some survivor managed to be the first to set foot on these Antarctic islands. The first confirmed sighting of mainland Antarctica cannot be accurately attributed to one single person.
THE OFFICIAL PLACE WHERE TWO OCEANS... - Cape Agulhas - Southernmost Tip of Africa
It can, however, be narrowed down to three individuals. According to various sources,    three men all sighted the ice shelf or the continent within days or months of each other: On 30 JanuaryBransfield sighted Trinity Peninsulathe northernmost point of the Antarctic mainland, while Palmer sighted the mainland in the area south of Trinity Peninsula in November Von Bellingshausen's expedition also discovered Peter I Island and Alexander I Islandthe first islands to be discovered south of the circle.
Historical maps showing a southern ocean between Antarctica and the continents of South America, Africa and Australia map by French cartographer Alain Manesson Mallet from his publication Description de L'Univers.
Shows a sea below both the Atlantic and Pacific oceans at a time when Tierra del Fuego was believed joined to Antarctica.