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Seafood (Fish)

April 5, 2012 at 10:32 AM | Posted in baking, diabetes, diabetes friendly, fish, Food, grilling, low calorie, low carb, seafood | 4 Comments
Tags: Asia, Food, Hong Kong, Japan, Seafood, Tuna, United States, World Resources Institute

Seafood is any form of marine life regarded as food by humans. Seafoods include fish, molluscs (octopus and shellfish), crustaceans

Fried fish and French fries in San Diego

(shrimp and lobster), echinoderms (sea cucumber and sea urchins). Edible sea plants, such as some seaweeds and microalgae, are also seafood, and are widely eaten around the world, especially in Asia (see the category of sea vegetables). In North America, although not generally in the United Kingdom, the term “seafood” is also applied also to fresh water organisms eaten by humans, so all edible aquatic life may be referred to as seafood.

The harvesting of wild seafood is known as fishing and the cultivation and farming of seafood is known as aquaculture, mariculture, or in the case of fish, fish farming. Seafood is often distinguished from meat, although it is still animal and is excluded in a strict vegetarian diet. Seafood is an important source of protein in many diets around the world, especially in coastal areas.

There are over 32,000 species of fish, making them the most diverse group of vertebrates. However, only a small number of species are commonly eaten as food fish.

The principal food fish species groups are:

Anchovy                                                Carp                                                  Catfish
Cod                                                          Eel                                                     Haddock
Halibut                                                  Herring                                            Mackerel
Salmon                                                  Sardine                                           Scad
Snapper                                               Tilapia                                               Trout
Tuna

Fish is a highly perishable product. The fishy smell of dead fish is due to the breakdown of amino acids into biogenic amines and ammonia.

Live food fish are often transported in tanks at high expense for an international market that prefers its seafood killed immediately before it is cooked. This process originally was started by Lindeye. Delivery of live fish without water is also being explored. While some seafood restaurants keep live fish in aquaria for display purposes or for cultural beliefs, the majority of live fish are kept for dining customers. The live food fish trade in Hong Kong, for example, is estimated to have driven imports of live food fish to more than 15,000 tonnes in 2000. Worldwide sales that year were estimated at US$400 million, according to the World Resources Institute.

If the cool chain has not been adhered to correctly, food products generally decay and become harmful before the validity date printed on the package. As the potential harm for a consumer when eating rotten fish is much larger than for example with dairy products, the U.S. Food and Drug Administration (FDA) has introduced regulation in the USA requiring the use of a time temperature indicator on certain fresh chilled seafood products.

Fresh fish is a highly perishable food product, so it must be eaten promptly or discarded; it can be kept for only a short time. In many

Fish at an Asian supermarket in Virginia, USA.

countries, fresh fish are filleted and displayed for sale on a bed of crushed ice or refrigerated. Fresh fish is most commonly found near bodies of water, but the advent of refrigerated train and truck transportation has made fresh fish more widely available inland.

Long term preservation of fish is accomplished in a variety of ways. The oldest and still most widely used techniques are drying and salting. Desiccation (complete drying) is commonly used to preserve fish such as cod. Partial drying and salting is popular for the preservation of fish like herring and mackerel. Fish such as salmon, tuna, and herring are cooked and canned. Most fish are filleted prior to canning, but some small fish (e.g. sardines) are only decapitated and gutted prior to canning.

Seafood is consumed all over the world; it provides the world’s prime source of high-quality protein: 14–16% of the animal protein consumed world-wide; over one billion people rely on seafood as their primary source of animal protein. Fish is among the most common food allergens.

Iceland, Japan, and Portugal are the greatest consumers of seafood per capita in the world.

The UK Food Standards Agency recommends that at least two portions of seafood should be consumed each week, one of which should be oil-rich. There are over 100 different types of seafood available around the coast of the UK.

Oil-rich fish such as mackerel or herring are rich in long chain Omega-3 oils. These oils are found in every cell of the human body, and are required for human biological functions such as brain functionality.

Whitefish such as haddock and cod are very low in fat and calories which, combined with oily fish rich in Omega-3 such as mackerel, sardines, fresh tuna, salmon and trout, can help to protect against coronary heart disease, as well as helping to develop strong bones and teeth.

Shellfish are particularly rich in zinc, which is essential for healthy skin and muscles as well as fertility. Casanova reputedly ate 50 oysters a day.

Health benefits

Research over the past few decades has shown that the nutrients and minerals in seafood can make improvements in brain development and reproduction and has highlighted the role for seafood in the functionality of the human body.
Heart

Doctors have known of strong links between fish and healthy hearts ever since they noticed that fish-eating Inuit populations in the Arctic had low levels of heart disease. One study has suggested that adding one portion of fish a week to your diet can cut your chances of suffering a heart attack by half.

Fish is thought to protect the heart because eating less saturated fat and more Omega-3 can help to lower the amount of cholesterol

Pan-fried fish

and triglycerides in the blood – two fats that, in excess, increase the risk of heart disease. Omega-3 fats also have natural built-in anti-oxidants, which are thought to stop the thickening and damaging of artery walls.

Regularly eating fish oils is also thought to reduce the risk of arrhythmia – irregular electrical activity in the heart which increases the risk of sudden heart attacks.
Brain

10-12% of the human brain is composed of lipids, including the Omega-3 fat DHA. Recent studies suggest that older people can boost their brain power by eating more oily fish, what with regular consumers being able to remember better and think faster than those who don’t consume at all. Other research has also suggested that adding more DHA to the diet of children with attention-deficit hyperactivity disorder can reduce their behavioural problems and improve their reading skills, while there have also been links suggested between DHA and better concentration. Separate studies have suggested that older people who eat fish at least once a week could also have a lower chance of developing dementia and Alzheimer’s disease.
Joints

Including fish as a regular part of a balanced diet has been shown to help the symptoms of rheumatoid arthritis – a painful condition that causes joints to swell up, reducing strength and mobility. Studies also show that sufferers feel less stiff and sore in the morning if they keep their fish oil intake topped up.

Recent research has also found a link between Omega-3 fats and a slowing down in the wearing of cartilage that leads to osteoarthritis, opening the door for more research into whether eating more fish could help prevent the disease.
Minerals

Fish is high in minerals such as zinc, iodine and selenium, which keep the body running smoothly. Iodine is essential for the thyroid gland, which controls growth and metabolism, while selenium is used to make enzymes that protect cell walls from cancer-causing free radicals, and helps prevent DNA damage caused by radiation and some chemicals.
Vitamins

Fish is also a source of vitamin A, which is needed for healthy skin and eyes, and vitamin D, which is needed to help the body absorb calcium to strengthen teeth and bones.

Fish and shellfish have a natural tendency to concentrate mercury in their bodies, often in the form of methylmercury, a highly toxic organic compound of mercury. Species of fish that are high on the food chain, such as shark, swordfish, king mackerel, albacore tuna, and tilefish contain higher concentrations of mercury than others. This is because mercury is stored in the muscle tissues of fish, and when a predatory fish eats another fish, it assumes the entire body burden of mercury in the consumed fish. Since fish are less efficient at depurating than accumulating methylmercury, fish-tissue concentrations increase over time. Thus species that are high on the food chain amass body burdens of mercury that can be ten times higher than the species they consume. This process is called biomagnification. The first occurrence of widespread mercury poisoning in humans occurred this way in Minamata, Japan, now called Minamata disease.

Research into population trends of various species of seafood is pointing to a global collapse of seafood species by 2048. Such a collapse would occur due to pollution and overfishing, threatening oceanic ecosystems, according to some researchers.

A major international scientific study released in November 2006 in the journal Science found that about one-third of all fishing stocks worldwide have collapsed (with a collapse being defined as a decline to less than 10% of their maximum observed abundance), and that if current trends continue all fish stocks worldwide will collapse within fifty years. In July 2009, Boris Worm of Dalhousie University, the author of the November 2006 study in Science, co-authored an update on the state of the world’s fisheries with one of the original study’s critics, Ray Hilborn of the University of Washington at Seattle. The new study found that through good fisheries management techniques even depleted fish stocks can be revived and made commercially viable again.

The FAO State of World Fisheries and Aquaculture 2004 report estimates that in 2003, of the main fish stocks or groups of resources for which assessment information is available, “approximately one-quarter were overexploited, depleted or recovering from depletion (16%, 7% and 1% respectively) and needed rebuilding.”

The National Fisheries Institute, a trade advocacy group representing the United States seafood industry, disagree. They claim that currently observed declines in fish population are due to natural fluctuations and that enhanced technologies will eventually alleviate whatever impact humanity is having on oceanic life.

National Dish of the Week – Japan

July 8, 2011 at 4:43 PM | Posted in fish, Food, noodle, vegetables | 4 Comments
Tags: Cooking, Hong Kong, Japan, Japanese cuisine, Kansai region, Michelin Guide, Soy sauce, Udon

Japanese cuisine has developed over the centuries as a result of many political and social changes throughout Japan. The cuisine eventually changed with the advent of the Medieval age which ushered in a shedding of elitism with the age of shogun rule. In the early modern era significant changes occurred resulting in the introduction of non-Japanese cultures, most notably Western culture, to Japan.

The modern term “Japanese cuisine” or washoku means traditional-style Japanese food, similar to that already existing before the end of national seclusion in 1868. In a broader sense of the word, it could also include foods whose ingredients or cooking methods were subsequently introduced from abroad, but which have been developed by Japanese people who have made these methods their own. Japanese cuisine is known for its emphasis on seasonality of food, quality of ingredients and presentation. The Michelin Guide has awarded Japanese cities by far the most Michelin stars of any country in the world (for example, Tokyo alone has more Michelin stars than Paris, Hong Kong, New York, LA and London combined).

Japanese cuisine is based on combining staple foods, typically rice or noodles, with a soup and okazu dishes made from fish, meat, vegetable, tofu and the like — to add flavor to the staple food. These are typically flavored with dashi, miso, and soy sauce and are usually low in fat and high in salt.

A standard Japanese meal generally consists of several different okazu accompanying a bowl of cooked white Japanese rice, a bowl of soup and some tsukemono (pickles).

The most standard meal comprises three okazu and is termed ichijū-sansai “one soup, three sides”). Different cooking techniques are applied to each of the three okazu; they may be raw (sashimi), grilled, simmered (sometimes called boiled), steamed, deep-fried, vinegared, or dressed. This Japanese view of a meal is reflected in the organization of Japanese cookbooks: Chapters are devoted to cooking techniques as opposed to ingredients. There may also be chapters devoted to soups, sushi, rice, noodles, and sweets.

As Japan is an island nation its people eat much seafood. Meat-eating has been rare until fairly recently due to restrictions of Buddhism. However, strictly vegetarian food is rare since even vegetable dishes are flavored with the ubiquitous dashi stock, usually made with katsuobushi (dried skipjack tuna flakes). An exception is shōjin ryōri, vegetarian dishes developed by Buddhist monks. However, the advertised shōjin ryōri at public eating places includes some non-vegetarian elements.

Noodles are an essential part of Japanese cuisine usually as an alternative to a rice-based meal. Soba (thin, grayish-brown noodles containing buckwheat flour) and udon (thick wheat noodles) are the main traditional noodles and are served hot or cold with soy-dashi flavorings. Chinese-style wheat noodles served in a meat stock broth known as ramen have become extremely popular over the last century.

Vegetable consumption has dwindled while processed foods have become more prominent in Japanese households due to the rising costs of general foodstuffs.

Japanese cuisine offers a vast array of regional specialties known as kyōdo ryōri, many of them originating from dishes prepared using traditional recipes with local ingredients. Mainly, there are Kanto region food and Kansai region food. Kanto region foods taste very strong. For example the dashi-based broth for serving udon noodles is heavy on dark soy sauce, similar to soba broth. On the other hand Kansai region foods are lightly seasoned, with clear udon noodles made with light soy sauce.

While “local” ingredients are now available nationwide, and some originally regional dishes such as okonomiyaki and Edo-style sushi have spread throughout Japan and is no longer considered as such, many regional specialties survive to this day, with some new ones still being created.

The traditional Japanese table setting has varied considerably over the centuries, depending primarily on the type of table common during a given era. Before the 19th century, small individual box tables,hadoken, or flat floor trays were set before each diner. Larger low tables, chabudai,that accommodated entire families were gaining popularity by the beginning of the 20th century, but these gave way to western style dining tables and chairs by the end of the 20th century.

Traditional Japanese table setting is to place a bowl of rice on your left and to place a bowl of miso soup on your right side at the table. Behind these, each okazu is served on its own individual plate. Based on the standard three okazu formula, behind the rice and soup are three flat plates to hold the three okazu; one to far back left, one at far back right, and one in the center. Pickled vegetables are often served on the side but are not counted as part of the three okazu. Chopsticks are generally placed at the very front of the tray near the diner with pointed ends facing left and supported by a chopstick rest, or hashioki.