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Sea urchin is not only a delicacy but also a very healthy dietary product. Sea urchins are eaten in Italy, America, New Zealand and other countries, but they are especially popular in Japan. The Japanese annually consume at least 500 tons of pure sea urchin roe, as well as in the form of additives to various dishes. Why is sea urchin caviar so attractive for them? What health benefits do sea urchins have? Let's find out.
Is sea urchin good for your health? Sea urchin is very good for your health because it increases the adaptive capabilities to increased physical exertion, accelerates the body's recovery in case of overwork, stimulates hematopoiesis processes, normalizes the level of leukocytes, increases the level of hemoglobin and erythrocytes in the blood.
But these are not the only health benefits of sea urchins. These creatures are extremely nutritious and good for your health. Sea urchin's useful and medicinal properties are since they eat algae, which nourish meat and roe with an exclusive composition of minerals, vitamins and other substances. Let's dive into all the health benefits of sea urchins.

Sea Urchin Health Benefits Ultimate Guide

Sea urchin's nutritional value per 100 g: 13.8 g of proteins, 4.3 g of fat, 2.5 g of carbohydrates. The product is low-calorie, 100 g contains only 86 kcal. Roe is slightly higher in calories - 104 kcal per 100 g. The product's glycemic index is only 15 units, which makes it an acceptable product for people who have diabetes.

Sea urchin roe helps to eliminate toxins, radionuclides and other harmful substances from the body. The product helps to recover from chemotherapy and radiation therapy. Sea urchin's roe appeared on the menu of the Japanese after the bombing of Hiroshima and Nagasaki. Sea urchin also improves the central nervous system's functioning, normalizes mood, and successfully combats stress and depression.
What are the benefits of sea urchin? The benefits of sea urchin include:

Sea ​​urchin roe is powerful support for the nervous system during periods of stressful overload, moments requiring increased concentration of attention and long periods without the possibility of sleep;

Sea urchin activates the work of the human reproductive and circulatory systems, strengthens the capillaries of the brain, serving as powerful prevention of stroke and sclerosis;

Sea urchin protects from seasonal epidemics of respiratory infections in large cities and stabilizes the function of the endocrine system;

Sea urchin promotes the rapid removal from the body of toxins, drugs and heavy metals, including radioactive substances.

The composition of sea urchin roe is impressive as it contains:

Vitamin A improves the functioning of the organs of vision.

Vitamins of group B, which are involved in the work of all vital systems of the body. The sea urchin holds the record for vitamin B12 content. Its amount is four times higher than in the beef liver.

Vitamin E normalizes the functioning of the reproductive system and improves the skin, nails, and hair.

Vitamin D takes the most active part in the exchange of mineral elements, improves the skeletal system's condition, and promotes cell regeneration.

A huge amount of micro and macro elements: calcium, magnesium, potassium, iodine, phosphorus, sodium.

Beneficial fatty acids for the activity of our brain and the cardiovascular system: Omega-3 and Omega-6.

Amino acids: glycine, phenylalanine, glutamic acid.

Studies have shown that sea urchin roe increases the adaptive capabilities of a person to increased physical activity, accelerates the body's recovery in case of overwork, stimulates hematopoiesis, normalizes the level of leukocytes, and increases the level of hemoglobin and erythrocytes in the blood. And all this is since sea urchin's roe contains many various fatty acids, phospholipids, carotenoids and prostaglandins. They stimulate many physiological processes in humans.

Another effect of sea urchin roe is associated with an excess of free radicals, which are believed to cause many diseases and even aging. They damage cell membranes, their lipid structures, disrupting homeostasis. Their uncontrolled formation is opposed by active substances contained in sea urchin roe.

According to scientists, the proportion of proteins in sea urchin roe is 18-20 percent. These are easily and quickly digestible proteins with a wide range of amino acids. Sea urchin contains about 30 percent of polyunsaturated fats, including deficient omega-3 and omega-6, iodine and vitamins A, E, D, B, PP. One sea urchin contains up to 30 grams of roe, which is one tablespoon. Scientists emphasize that sea urchin caviar is not a treatment but prevention of exacerbation of chronic diseases.

Sea urchin roe is a powerful natural immunomodulator and ensures the body's normal functioning, despite aggressive external factors. Therefore, it was included in the diet of Japan's inhabitants after the nuclear bombings of Hiroshima and Nagasaki. Also, sea urchin caviar improves the cardiovascular system's functioning, reproductive system, thyroid gland, and normalizes blood pressure.

Sea urchin roe can rightfully be called the "elixir" of youth. There is no wonder that there is an ancient ritual of body rejuvenation in Japan when every inhabitant eats sea urchin caviar before eating. Most importantly, eating sea urchin roe does not have any side effects unless you are allergic.

Regular sea urchin roe eating has a beneficial effect on the skin, smoothes fine wrinkles, has a good effect on hair and nails, normalizes blood pressure and successfully fights stress. Sea urchin roe contains lecithin, which supports brain function and improves liver function.

Even after irregular consumption of sea urchin roe, an improvement in mood is noted, fatigue is sharply reduced, and the body's defences increase. The systematic sea urchin consumption leads to the normalization of cholesterol, improves the functioning of the endocrine and genitourinary systems, normalizes blood pressure, and increases immunity.
Are sea urchins harmful to humans? Sea urchins can only be harmful if you have an individual intolerance, which can cause an allergic reaction. Sometimes sea urchin can cause anaphylactic shock (severe allergic reaction) if you step on it. The poison injected into the tissues will not kill you because there is too little of it.

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Sea Urchin Health Benefits Ultimate Guide | ItsFoodtastic

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Sea urchin is not only a delicacy but also a very healthy dietary product. Sea urchins are eaten in Italy, America, New Zealand and other countries, but they are especially popular in Japan. The Japanese annually consume at least 500 tons of pure sea urchin roe, as well as in the form of additives to various dishes.

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ocean

I am a Sea Urchin and a part of a class of organisms called Echinoidea. There are 950 species of Echinoderms in all of the world’s ocean and found all over the world in warm and cold water, typically in rock pools, mud, coral reefs, kelp forests, and seagrass beds. I live in clumps of 5-10 and my lifespan often exceeds 30 years, however scientists have found some specimens to live over 200 years making me one of the longest living animals on earth. I am round and spiny ranging from 3-10 cm. I can be various colors including black, dull shades of green, olive, brown, purple, blue and red. Since I am nocturnal, I usually hide during the day and become more active and feed at night. I prefer to eat seagrass and seaweed that grows on the rocky seafloor. Sea urchins are a primary food source for sea otters, starfish, wolf eels, triggerfish, and others that hunt for me. In the San Diego area, sea urchins are important to kelp forest ecosystems as a food source for the California spiny lobster and sheephead.

My spines are moveable and helps me protect myself from predators. On my underside I have five teeth that continually grow and are used for grazing. Scientists have discovered that I move my spines in reaction to shadows as a result of my light sensitivity. I lodge myself in a holes and crevasses to anchor myself to the seafloor so that waves cannot sweep me away. Amazingly, I have the ability to regenerate parts of my body if predators break of my spines. Take a look next time you explore the local tide pools in San Diego, look carefully and you might see me in the nooks and crannies of rocky intertidal areas.

Why should humans care about me?

Sea urchins are a vital part of our environment because they feed on dead organisms and help to recycle materials into usable energy for other organisms. It is dangerous if populations of echinoderms increases or decreases too drastically in an ecosystem; if a balance is not achieved the entire ecosystem can collapse. If the sea urchin populations decrease by too much, predators that depend on them as a food source die off and fisheries can suffer. On the other hand, if sea urchin populations increases by too much the can create what are known as “barons” or larger swaths of seafloor free of algae. Algae is one of the most important primary producers in the ocean and the lives of species that dwell in kelp forest ecosystems depend on healthy balanced sea urchin populations.

If you would like to help in the conservation of my species there are ample volunteer opportunities with WILDCOAST. There is an upcoming opportunity to perform large scale estuary cleanups on February 18th with WILDCOAST and Surfrider. Please follow this link for registration information or contact cory@wildcoast.net for more info on how to get involved.

Sincerely,

Purple Sea Urchin

Strongylocentrotus purpuratus

This weeks get to know your neighbor segment was contributed by Hannah Becker and Liana Cota of Mar Vista High School’s Eco-Ambassador program.

Image by Dana Roeber Murray

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Get to know your neighbor: Sea Urchin, Echinoidea

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I am a Sea Urchin and a part of a class of organisms called Echinoidea. There are 950 species of Echinoderms in all of the world’s ocean and found all over the world in warm and cold water, typical…

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Download Article

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Whether you accidentally step on a sea urchin or if you handle one carelessly, you can get stung. Sea urchins are venomous, so prompt and proper care is important. In the event of a sea urchin sting, stay calm and follow protocol to avoid serious infection.

1. Recognize a sea urchin sting. In order to treat a sea urchin sting, you must be certain you were stung by an urchin and not another marine animal.

Sea urchins have flat or globe shaped bodies and are covered in spines. They are found in oceans worldwide, but are more likely to be present in warmer regions.

Sea urchins lurk in rocky parts of the water and will sting if threatened. Most people get stung when they accidentally step on an urchin.

You can successfully manage most stings on your own. However, if you have difficulty breathing, nausea, chest pain, or signs of infection like redness and pus you should seek care immediately.

You should also seek medical care if you were stung around a joint, as the spines may require surgical removal in such cases.

2. Know what parts are poisonous. Sea urchins are flat, globe-shaped animals. While generally non-aggressive, urchins will sting if stepped on unintentionally. Certain parts of a sea urchins body release poison.

Sea urchins release venom through their spines and pedicellaria.

Spines produce puncture wounds and can stay in skin. They should be removed immediately in the event of an attack.

The pedicellaria are seizing organs found between the spine that latch onto a target when an urchin is attacked. They should also be removed quickly after being stung.

3. Remove the spines. After being stung, remove the spines as quickly as possible to minimize your exposure to venom.

Use tweezers to pull out the protruding ends of large spines. Move slowly so that the spines does not break off, as medical treatment will be needed if this occurs.

Hot wax can also be used to remove spines, if they are particularly deep and cannot be removed with a razor. Apply hot wax to the area, let dry, and remove. The spines should be pulled out with the wax.

Longterm medical problems can occur if spines are not removed properly. If you're not sure you got all the spines out yourself, see a doctor.

4. Remove the pedicellaria. The pedicellaria must also be removed after an attack to stop exposure to venom.

The pedicellaria can be removed by applying shaving cream to the infected area and then scraping it off with a razor.

Be gentle with how you handle the razor as not to cause further distress to the wound.

1. Clean the wound with soap and water. As soon as you have removed the spines and pedicellariae, you need to clean and flush the wound.

This will be uncomfortable as your wound is still sore and will sting to the touch. Be prepared to work through the pain or have someone assist you if you're worried about not being able to tolerate the discomfort.

You can also use hydrogen peroxide or betadine solutions instead of soap.

Rinse the area thoroughly with clean drinking water after washing.

2. Do not close the wound. Bandages and tape should not be used to seal the wound. Any embedded spines not removed with tweezers need to work their way out of the skin to avoid bacterial infections and effects of the urchin's venom.

3. Bathe the wound. To treat the pain and minimize chances of infection, some people bathe their wound after the initial cleaning.

You can submerge the wound in hot water. The water should be hot to the touch but not boiling. Keep the wound in the water for at least an hour or as long as you can tolerate the heat. This will help ease the pain and dissolve any remaining spines. You can add Epsom salt or magnesium sulfate compound to the water to aid in this process.

Some people try a hot vinegar bath. Mix a small amount of vinegar in a tub of hot water and soak for 20 to 40 minutes. You can also add Epsom salt to the water, as this will help the remaining spines dissolve.

1. Treat the wound before bed. Before you go to bed, you should put a small dressing on the wound to avoiding irritating it overnight.

Place a vinegar soaked cloth over the wound and wrap it in plastic wrap. Tape the plastic wrap on so it stays secure.

Keep the dressing loose, however. Remember, you don't want to close up the wound completely as the remaining spines need to work their way out.

2. Take antibiotics and painkillers. To ward off infection and treat any lingering pain, over-the-counter antibiotics and painkillers should be taken as instructed.

Topical antibiotic ointment, available at most drug stores and supermarkets, should be applied on the wound. While this should be done in any case as a precaution, it's especially important if you notice redness or swelling.

Tylenol and ibuprofen are good choices to manage the pain. You should take the recommended dose every 4 to 8 hours until symptoms lessen.

3. Watch for signs of infection. While sea urchin wounds usually heal well if treated properly, urchins are venomous. Know the signs of infection.

Signs of infection include redness, pus, swelling of the affected area or of the lymph glands that drain the affected area (neck, underarms, or groin), or heat.

Seek medical care if signs of infection do not clear up within a few days.

If you develop any breathing problems or chest pain, the infection may be severe and you should go to your nearest emergency room.

Seek immediate medical attention if you have multiple puncture wounds, fatigue, weakness, muscle aches, or difficulty moving your arms or legs. Also, get immediate help if you develop signs of a serious allergic reaction: breathing problems, chest pain, hives, redness of the skin, or swelling of the lips or tongue.

Board Certified Pediatrician

This article was co-authored by Laura Marusinec, MD. Dr. Marusinec is a board certified Pediatrician at the Children's Hospital of Wisconsin, where she is on the Clinical Practice Council. She received her M.D. from the Medical College of Wisconsin School of Medicine in 1995 and completed her residency at the Medical College of Wisconsin in Pediatrics in 1998. She is a member of the American Medical Writers Association and the Society for Pediatric Urgent Care. This article has been viewed 903,678 times.

Updated: September 16, 2021

Medical Disclaimer

The content of this article is not intended to be a substitute for professional medical advice, examination, diagnosis, or treatment. You should always contact your doctor or other qualified healthcare professional before starting, changing, or stopping any kind of health treatment.

To treat a sea urchin sting, use tweezers to pull the spines out of your skin as quickly as possible. Next, apply shaving cream to the wounded area and gently scrape it off with a razor to remove all traces of the venomous spines. Then, clean the wound with soap and water and pat your skin dry. You can take over-the-counter painkillers and apply antibiotic ointment to manage the pain and swelling. To prevent irritation at night, cover the wound with a loose bandage before going to bed. Be sure to remove the bandage in the morning to let the wound breathe during the day! For tips on recognizing the symptoms of infection, read on!

Thanks to all authors for creating a page that has been read 903,678 times.

"My little sister stepped on an urchin in Puerto Rico. We're from Colorado, didn't know how to get them out. We were going to leave the spines in overnight, but the article explained that we should remove them right away! Thanks for helping my sister!" ..." more

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Whether you accidentally step on a sea urchin or if you handle one carelessly, you can get stung. Sea urchins are venomous, so prompt and proper care is important. In the event of a sea urchin sting, stay calm and follow protocol to avoid...

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Sea urchins are marine benthos and its fishery is one of the important echinoderm fisheries in the world due to their highly prized gonad especially in Asia, Mediterranean and Caribbean countries. In Malaysia, sea urchin fishery is only available in

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Calories, fat, protein, and carbohydrate values for for Sea Urchin and other related foods.

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The kelp canopy begins to fill in

By April, the kelp canopy has usually begun to fill in, especially along protected parts of the coast. The kelp grows rapidly as sunlight increases and upwelling events bathe the kelp in cold, nutrient-rich water.

As winter storms wane, the kelp forests are less likely to be damaged by storm waves. The northwest wind waves of April are smaller and have a shorter period than winter storm waves. The wind waves of spring may damage to the kelp canopy, but are less likely to damage or rip out entire holdfasts.

The rate at which the kelp canopy fills in varies greatly from year to year and from place to place. In sheltered areas the canopy already may be thick in April; in exposed areas there may be no canopy at all. The extent of the kelp canopy depends on a number of factors, but the two most important are how severe the storms were during the previous winter and how protected a particular kelp bed is from the winter swells.

In exposed coastal areas, large portions of the canopy are typically destroyed each winter. By April, new kelp stipes that started growing up toward the surface (from surviving holdfasts) in February or March are just beginning to reach the surface.

As the kelp canopy expands, it begins to shade out the smaller red algae that, like the new kelp shoots, have been growing up from the seafloor since early spring. These "understory algae" grow at their fastest in April. By the end of the month their growth will already by slowing down as the kelp canopy fills in above them.

Bull kelp reaches the sea surface

As described in March, bull kelp is an annual alga that grows in exposed coastal areas and sprouts from spores on the seafloor each spring. After sprouting in January or February, these algae grow rapidly and begin reaching the surface in April.

Note: A few bull-kelp plants may live for up to 18 months, so in April, in addition to new plants, you may also may see the grapefruit-sized floats of these mature algae at the surface. These year-old plants will probably survive until fall, when they get a second chance to release spores before dying off entirely.

Animals begin to return to the kelp canopy

A school of blue rockfish swim around a kelp stipe. (Source: Chad King, NOAA/SIMON)

For turban snails, crabs, small fishes, and other animals that live in the kelp, the expanding canopy provides increasing protection against seabirds and other predators. As new kelp stipes grow upward, they are gradually recolonized by these small animals. Not coincidentally, predators such as sea otters and rockfish also return to the kelp beds as the canopy expands.

Following each spring upwelling event, a pulse of nutrients reaches the kelp beds. During the "relaxation periods" that follow upwelling events, surface currents deliver a rich soup of microscopic algae and animals toward shore. These phytoplankton and zooplankton provide a feast for small animals such as barnacles and hydroids that live in the kelp beds.

Note: The phytoplankton and zooplankton that are carried toward shore during relaxation events also provide food for animals in the tide pools. However, animals in the kelp beds have "first helpings" to this food, and sometimes eat up most of the zooplankton before they can reach shore.

Another major benefactor from these waves of microscopic animals are juvenile rockfish, which eat large copepods, krill larvae (and other larvae), as well as smaller juvenile fish.

Large schools of juvenile blue, olive, and black rockfish begin to appear in the kelp beds during April or May. These young fish are entering the kelp beds for the first time, after spending the previous three to four months as larvae drifting at sea.

After hanging out in relative safety of the kelp canopy for a few months, some of these rockfish will settle down to the seafloor later in summer.

Spring-spawning rockfish release larvae

While the young of blue and olive rockfish are already beginning to enter the kelp beds in April and May, other rockfish are just giving birth, releasing their larvae to drift in the waters of the open ocean. Most of these "spring-spawning rockfish" don't form large schools and are less likely to be sought after by commercial fishermen.

The roster of spring-spawning rockfish includes kelp rockfish, gopher rockfish, and black-and-yellow rockfish. Fisheries biologists sometimes call these fish the "KGB complex" because they tend to hang out together and sometimes interbreed.

Gopher and black-and-yellow rockfish generally follow this yearly reproductive schedule (kelp rockfish follow about a month later)

Red sea urchins spawn

A red urchin hiding among rocks and California hydrocoral (Source: Steve Lonhart / SIMoN NOAA)

If you put on SCUBA gear and dive down to the seafloor in April, you might be lucky enough to witness the spawning of one of the kelp's greatest potential enemies, the red sea urchin ( Mesocentrotus franciscanus). These urchins feed voraciously and preferentially on giant kelp.

Although some red urchins can be found spawning throughout the spring (starting as early as February), the largest number spawn between March and May. Scientists aren't sure what triggers the spawning of red sea urchins at this time of year. Some studies have shown that they may get in the mood because of increases in food supply (lots of rapidly growing kelp) and/or changes in water temperature.

Note: In Southern California, red sea urchins spawn all year round. In northern California, they spawn in May or June. Around Puget Sound, red sea urchins may not reach peak spawning until June or even July.

During spawning events, each female red sea urchin releases several million microscopic eggs into the surrounding seawater, just as nearby males are releasing their sperm. The urchin eggs are more likely to be fertilized when there is a relatively dense population of urchins--at least two urchins per square yard of seafloor.

Those red urchin eggs that are fertilized by a sperm develop into tiny larvae, which drift at sea for a month or two. As these larvae develop, they start to eat spring-bloom diatoms--a habit they will continue for a month or so even after they settle to the seafloor.

Sea urchin larvae are weak swimmers, so they are the mercy of the nearshore currents. During the upwelling season, these currents are likely to take the urchin larvae far offshore. Thus, depending on the currents and the availability of food, red-sea-urchin larvae may return to shore in droves. Or they may all drift far from the coast and die of starvation.

Aside from humans and sea otters, one of the red urchin's main predators is the giant sea star, Pisaster giganteus. Like red sea urchins, giant sea stars also spawn in spring (typically during March or April). The fertilized giant-sea-star eggs eventually develop into microscopic, swimming larvae. Like the larvae of many tide-pool animals, these sea-star larvae often feed on spring diatoms.

Young sea otters begin to forage on their own

In April, you can still see plenty of young sea otters floating around with their mothers in the kelp beds. By this time most young sea otters have been weaned and trained by their mothers in gathering and processing food.

Sometimes these young sea otters forage by themselves, but more often they continue to hang out in loose groups with other young otters and their mothers. You can often find these groups in places where kelp canopy has survived the winter and is still relatively dense.

One April morning I watched a young sea otter floating all by itself near the cliffs along West Cliff Drive. The youngster dove repeatedly, but never seemed to come up with anything. However, each time the otter surfaced, a Heerman's gull would swim up to find out what kind of prey the otter had brought up. After twenty minutes of fruitless effort, the young otter gave up and just floated on its back without moving. At that point the gull flew away to look for a more reliable source of free food.

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The kelp canopy begins to fill in By April, the kelp canopy has usually begun to fill in, especially along protected parts of the coast. The kelp grows rapidly as sunlight increases and upwelling events bathe the kelp in cold, nutrient-rich water. As winter storms wane, the kelp forests are less likely to be damaged by storm waves.

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(PDF) Sea Urchin Fisheries in Malaysia: Status, Potentials and Benefits

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Sea urchins are marine invertebrates, inhabiting the depths of coral reefs and rocky shores that are covered with coralline algae and seaweeds. They are usually spherical in shape, and their whole body is covered by numerous thorns or spines that act as defense mechanism against predators.

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Japan Sea Urchin Farming - Sea Urchin Harvest and Processing - Sea Urchin Raising indoor

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Highlights

*

A sustainable feed based on food discards was provided to sea urchins for 3 months.

*

Reared sea urchins had higher gonad growth and development than wild specimens.

*

Reared sea urchins had marketable gonad colour, qualitatively better than wild ones.

*

Food processing discards are valuable ingredients for producing sea urchin feeds.

Abstract

Development of sustainable aquaculture practices is a suitable solution to reduce the pressure on overexploited stocks of the Mediterranean sea urchin, Paracentrotus lividus, and to respond to the increasing market demand. To move forward the Blue Growth and following the principles of circular economy, a three-month feeding experiment was conducted to test a sustainable feed based on food processing discards on sea urchins. Two feed formulations differing on the proportions of the two main ingredients (endive outermost leaves and European anchovy discards in a ratio of 60:40 and 80:20 respectively) were prepared and tested on P. lividus gonad yield, development and quality. The results were compared with those of wild sea urchins to assess the differences with natural patterns. Both feed formulations promoted gonad growth resulting in a significantly higher percentage increase in gonad biomass compared with wild specimens (490%, 330% and 78% increase in gonad weight in the feed 60/40, 80/20 and wild sea urchins respectively). Similarly, GSI of reared sea urchins varied by about 3-12% and 14% for sea urchins fed with feeds 80/20 and 60/40 respectively, while that found in wild sea urchins varied by about 3-5%. Gonad development was also boosted by the provision of the sustainable feed, as sexual maturation was faster in reared specimens than in wild ones. At the end of the trial, reared sea urchins showed also a very high (> 90%) frequency of marketable gonad colour. Lastly, the formulation with a more balanced vegetal/animal ratio (feed 60/40) gave the best results overall, combining the highest GSI and the best gonad colouration. Outcomes of this study confirm the suitability of food processing discards as ingredients for sea urchin feeds, although further research is needed to evaluate the effects on nutritional quality and organoleptic features of sea urchin gonads.

Data Availability

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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Turning waste into gold: Sustainable feed made of discards from the food industries promotes gonad development and colouration in the commercial sea urchin Paracentrotus lividus (Lamarck, 1816)

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A sustainable feed based on food discards was provided to sea urchins for 3 months. * Reared sea urchins had higher gonad growth and development than wild specimens. * Reared sea urchins had marketable gonad colour, qualitatively better than wild ones. * Food processing discards are valuable ingredients for producing sea urchin feeds.

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Turning waste lobster shells into bioplastic - The Shellworks