Saturday, May 19, 2018

Amazing Fact about Puffer Fish

General description

There are as many as 120 species of puffer fish that live mostly in tropical  and subtropical ocean waters, but some species live in brackish and even fresh water. All belongs to the order tetraodontiformes. The puffer fish live primarily at depths ranging from 18 to 100 meters. It is also a reef inhabitant, lives near the coral area.

Puffer fish also called blow fish, toad fish, swell fish, fugu, ikan buntal and baloon fish. They are named baloon fish after their habit of inflating themselves with water or air when threatened, making it difficult for predator to swallow them. 

Puffer fish is an agressive fish. Puffer fish can attack any other fish they consider enemy. Puffer fish hunt by attack and bite the prey. If the prey is larger, the puffer fish kill the prey first and then eat the prey gradually till it end.

Puffer fish more a carnivore than omnivore animal where the diet was composed mainly cephalopods (squid and cuttlefish), crustaceans (particularly crabs), fish, shrimp, and other vertebrates. 

Appearence

Puffer fish have long, tapered bodies with bulbous and colors to advertise their toxicity, while others have more muted or cryptic coloring to blend in with their environment. Puffer fish do not have scales. Their skin is thick and rough. 

Puffer fish have four large teeth (two on the upper jaw and two in lower jaw). Fuse together forming a strong beak-like structure. Makes puffer fish mouth so strong it can crush shell of moluscas, snail, sea urchin, crab and other vertebrates as their main food source.

Puffer fish can quickly inflating (puff up) their body whenever they feel threathened by predator or have stimulation that disturb them. 

Puffer fish can have spine. Some puffer fish species have spines on the skin, These spines usually lies flat on the side of the fish. When the fish puff up, the skin gets hard and the spine stick out in all directions. Tetrodotoxin (TTX) toxin can also be distributed into the skin. 

These adaptations (puff up, spine and TTX toxin) are their way to prevent the predator from trying to eat them. Puffer fish predator include sea snake, shark (specially tiger shark), and human.

The puffer fish vary in size, usually small to medium in size 2 – 35 cm (1 – 14 inch) although some species might have 100 cm (39 inch) in lenght. Average lifespan of the puffer fish is around 10 years.

Because of the unique and distinctive characteristics, people sometimes keep the puffer fish in aquarium as ornament fish and considering the agressive behavior, they usually put in group together with their own species. 

Puffer fish unique Characteristics

How the puffer fish puff up (inflate) ?

When there is a predator, puffer fish can inflate their body in a few seconds. The puffer fishs swallow a lot of water or air into its stomach (they have highly elastic stomach). Filled with water or air, its stomach becomes bigger. Other body parts inside the puffer fish are pushed to the side to make the room.

Watch the puffer fish puff up (inflate) in this video :


This puff up turn puffer fish into virtually inedible ball 2 – 3 times their normal size. Then only the bigger animals can eat it. The inflating can last up to 2 hour.

Tetrodotoxin (TTX)

Pupper fish has potent neurotoxin called Tetrodotoxin (TTX). TTX is known a non - protein organic compound and one of the strongest marine paralytic toxins today. TTX can be found in the liver, gonads, intestines, and skin of this fish and can cause death in approximately 60% of persons who ingest it (Ellenhorn and Barceloux, 1988). The flesh and testicle are organ with less toxin and weak toxicity except the species of lagochephalus lunaris and chelonodon patoca. 

Puffer fish usually use it as biological defensive mechanism againts predatory attack.

Level of toxicity of puffer fish varies according to the type of organ, geography, season, and sexes.  TTX level on female puffer fish is higher than on male puffer fish. That is because TTX level is higher on ovarium than found in testicle. 

Although the toxin is very dangerous, TTX can be used in pharmacheutical field. TTX can be used as a local anesthetic drug (can block neural). Tetrodotoxin combine with bupicavaine and dexamethasone can increase the anesthetic time. The first medicine marketed based on tetrodotoxin is tectin. This medicine is developed by WEX pharmacheutical inc. In small doze, this medicine is effective to reduce the chronical pain of a cancer patient. 

If cleaned and dressed properly, the puffer fish flesh or musculature is edible and considered a delicacy by some japanese.


How the puffer fish gets neurotoxin (TTX) in its body ?

TTX is originally produced by marine bacteria and distributes over a wide variety of aquatic animals. For example puffer fish, the blue-ringed octopus Hapalochlen moculosa, the carnivorous gastropod Charonia sauliae, starfish of genus Astropeten, xanthid crabs, the horseshoe crab Carcinoscorpius rotundicauda. 

The TTX of puffer fish is considered tobe not indigenous, but come from toxic food organism via the food chain (i.e. their prey).

The transfer, accumulation, and elimination mechanism of TTX taken up into the puffer fish body via prey remain unclear. Recent studies have revealed that the liver of puffer fish has a specifix TTX uptake mechanism, and TTX introduced into the puffer fish body is first absorbed in the liver and then transferred to the skin throuh the circulatory system.

The main symptomps of human intoxication include numbness of lips, tongue and limbs, vomited, paresthesia, dysarthria, respiratory disstress. Death can occur due to respiratory failure in most critical cases. (Noguchi and Ebesu, 2001)

When a poisoning occur, it is essential to transport the patient immediately to a well equipped hospital. At present, there is no antidote or specific medication for TTX, and no fundamental treatment besides facilitating elimination of the toxin from the body and managing the respiratory or circulatory system using an artificial respiratory.

Reference

Ellenhorn, M.J. and Barceloux, D.G. 1988. Medical toxicology, Diagnosis and treatment of human poisoning. Elsevier Science Publishing Company Inc. New York, 977 pp.

Mehmet Aydın. 2011. Growth, Reproduction and Diet of Pufferfish (Lagocephalus sceleratus
Gmelin, 1789) from Turkey’s Mediterranean Sea Coast. Turkish Journal of Fisheries and Aquatic Sciences 11: 569-576. Central Fisheries Research Institute (CFRI) Trabzon, Turkey in cooperation with Japan International Cooperation Agency (JICA), Japan.

Noguchi, T. and J.S.M. Ebesu. 2001. Puffer poisoning: epidemiology and treatment. J. Toxicol.-Toxin
Reviews 20: 1–10.
RLMS Ari Wibowo, dkk. 2016. Eco Leather Penyamakan Ikan Buntal. Cetakan. 1. Yogyakarta: ATK Press, 2016.

Osamu Arakawa, Deng-Fwu Hwang, Shigeto Taniyama and Tomohiro Takatani. 2010. Toxins of Pufferfish That Cause Human Intoxications. Coastal Environmental and Ecosystem Issues of the East China Sea, Eds., A. Ishimatsu and H.-J. Lie, pp. 227–244. TERRAPUB and Nagasaki University,

Piranha : The most dangerous amazonian fish

General description

Piranhas are fresh water, tropical fishes belonging to the family characidae, which also include pacus and tetras. There are many species of piranha, some are Serrasalmus marginatus, Serrasalmus spilopleura, Pygocentrus nattereri (red-bellied piranha)

Piranhas are agressive predators and opportunistic feeders. They have fearsome reputation as the most dangerous amazonian fish. But human regularly swim, bathe and wash clothes in piranha infested water without incident. The reports that piranha going after humans are extremely rare.

Piranhas

Appearance

Piranhas has deep, laterally compressed bodies. They vary in color by location, population and age. But many are silvery gray or golden and some have bright colors such as red or orange on their head, belly or fin.

Figure 1 show the variation of the piranha body forms. piranhas have a thin shape when viewed head on. From the side they appeared broad and round. Ranging from sharp- snouted to blunt-headed, with various degrees of body compression :

Piranha general body form

General body form (lateral and frontal view) of three species of piranhas from pantanal region, mato grosso. Brazil. (a. Serrasalmus marginatus (ZOEC 1603), b. Serrasalmus spilopleura (ZOEC 1602), c. Pygocentrus nattereri (ZOEC 1580))

Piranhas have short, powerful jaws, and lower jaws that protrude beyond their upperjaws. Both jaws are lined with sharp triangular teeth, which allows piranhas to bite into and tear the flesh of their prey.
Piranhas commonly grow to 12 inches in lenght and weight less that 2 (two) pounds, but have been reported to grow up to 16 inches and weight over 7 pounds.

Habitat preference

Piranhas are native to the central and southern river system of south america (most notably the amazon river), where they inhabit tropical rivers and stream and ofter found in murky water. Usually found in fast moving portion of rivers, piranhas will move to flooded riverside regions to feed and reproduce.


Distribution

South american rivers of colombia, venezuela, guyana, paraguay, brazil and central argentina.

Primary diet

Piranha feed on fish, insect, crustacean, amphibian, mollusk, worm, carrion, alge, and water plant. But they often feed (piranha attack) in large group (20 -30 individual) to kill prey like capybaras. (Omnivore)

Predator

Human, crocodile, caiman and larger fish species (including vampire tetra).

Life span

Piranha can live up to 8 years but red bellied piranha has been seen to live almost 10 years in aquarium setting.

Mating behavior

During mating season, red bellied piranhas will move to regions of slow moving waters. Female will lay up to 5,000 eggs at a time and ready to lay another batch in just a few weeks. Once laid, the male will swim by and fertilize the egg which are sticking to plant and sediment. Hatching periode vary 10 to 15 days, according to water temperature.

During the mating season, the male will guard the eggs and are extremely territorial toward all nearby fish and potential predators (including human). Young will hatch in a few weeks and spend the first few month feeding on insect during the day.

Predatory tactics

There are four main categories of hunting method toward fish prey were observed : lurk or ambush, stealthy approach or stack, approach under disguise, and chase (see figure 4)

Piranha predatory tactics

Stalking was a frequent mode of hunting employed by both Serrasalmus marginatus and Serrasalmus spilopleura. The slow, stealthy approch within striking distance was usually done from behind or below the prey, which frequently was engaged in feeding (figure 4a)

Lurking was employed by Serrasalmus marginatus and by Pygocentrus nattereri during day time. Both species ambushed from within the abundant aquatic vegetation and dashed after passing prey mainly from behind. Most of these lunges by Serrasalmus marginatus were aimed at the flank or the rear of the prey and the predator obtained a mouthfull of scales, or more rarely a piece of fin.

Approach under feint was observed for Serrasalmus spilopleura, which lingered  close to the prey without any signal of stealth, behaving as of not interested in it. From time to time they join nearby shoals of small characin and repeatedly bit off the caudal fin of the shoaling fish. Apparently the characin did not recognize the piranhas as predators, as they showed no signals of being alarmed unless actually bitten.

Chasing after small fish was observed mainly for Pygocentrus nattereri preceeded by lying in wait within the vegetation. One individual of Pygocentrus nattereri was seen chasing after a characin or chiclid for about 4 meters before grasping the prey from behind (figure 4b) and cutting it in two. 

Watch here to see the piranhas feeding video :


Piranha facts.
  • The bite force of piranha is 3 (three) times its body weight. 
  • Piranha swallow their food whole.
  • The red bellied piranha will bite when underfed, overcrowded or threatened. They also bite anything that move where blood is present in the water.
  • The piranhas teeth are also use as scissors or razor blades by the native tribes.
  • Piranhas can replace lost teeth
  • Young piranhas have been known to feed on the fin of the other fish, but these fin will heal in just a short time.
  • Piranhas help to keep rivers clean by eating injured or dead animals.
  • Young piranhas are known as “fry” and a group of piranhas is known as a “shoal”
  • The red bellied piranhas is a commonly food fish for local communities and is also caught for use as bait for larger cat fish

References

Ivan Sazima and Fransisco A. Machado. 1990. Underwater observations of piranhas in western brazil. Environmental Biology of Fishes 28: 17-31, Kluwer academic Publishers. Netherland

California Department of Fish and Wildlife. Piranha, Family Characidae. 

Tuesday, February 20, 2018

How To Peel Hard-Boiled Egg Easily

Hard boiled egg are one of our favourite dish. We have them in our cooking recipe such as fried chilli egg, egg stew or added to our salads. For that, clean and smooth peeled hard-boiled egg is what we looking for. The problem is, sometimes it is difficult it to remove the egg shell smoothly without making dent or scar to the egg surface. But not anymore, now I have simple procedure that make peeling hard boiled egg easy and fun to do.

These are simple steps of peeling hard-boiled eggs. You can easily follow and get consistent result. 
Steps for creating easy to peel hard-boiled eggs :

1. Boiled enough water in a pan so that you can cover the entire egg surface in it. The pan should deep enough to fill with water about one inch above the egg surface. Also make sure that the pan wide enough to fit the whole eggs in one layer. Stacking egg one another is not recommended and can crack the egg shell. This is important. A flimsy pan will not work well. It will conduct uneven heat and make unconsistent cooked eggs.

2. When the water boiling, add about one tablespoon of baking soda. Adding baking soda to water make the cooking water alkaline. The alkaline from using baking soda loosening the bond between the egg whites and the inner membrane of the shell. Thus it will make the eggs easier to peel. 

How To Peel Hard-Boiled Egg Easily

3. When the water still actively boiling, place egg using ladle or spoonlike tool so that it carefully placed in the base of the pan. Boil the egg approximately 12 minutes. You don’t have to boil at high temperature at the whole time. When the water back to boil, turn the temperature (heat) lower. You can then continue boil eggs with lower heat. That is to avoid splashing and overcooked. The sign of overcooked egg is mostly the greenish tint shown to the york. It is not harmfull to ingest, just not very pretty to look at.

4. After 12 minutes turn off the heat. Remove the pan and drain the boiled water. Wait for 5 minutes to cool down. 

5. Now is time to peel the hard boiled egg. I will show two ways to do it. First by using glass jar and second by using ice water. First. Peel the hard boiled egg using glass jar. Fill ¼ of the glass jar with water, insert hard boiled egg into the jar. Close the cap and shake the egg back and forth until the shell crack evently. Take the egg off the jar and peel the shell by hand. The shell should peel easily. Do these steps again with other eggs. 

Second. Peel the hard boiled egg using ice water. Put the hard boiled egg into a basket of ice water, leave the egg on ice bath for about 10 minutes. After that, take the egg out, crack, roll against cutting board and peel one by one. The shell should peel easily by now. The egg white seperate smoothly from the shell. Egg shells are porous and plunging them into ice water will help seperate the shell and the membrane from the flesh of the eggs.

That it. Done. Enjoy your smoothly peeled hard-boiled eggs.

Note :
  • Try to avoid hard boiling any egg that has an obvious hairline crack in it. Because it will most likely to break when egg put into boiling water.
  • The easiest way to peel the eggs is to peel immediately after removing them from the ice water. They will still peel nicely a day (or a week) later but the shell will practically fall off if you peel them right after making them.

Watch the video of how to peel hard boiled egg easily here :


We think Peel the hard boiled egg using ice water is the best technique we have ever tried to make easy to peel hard-boiled eggs. It doesn’t matter how old or new the eggs are, the result is consistently good. Cheers.

Tuesday, February 13, 2018

How to repair gas stove burner flame being too low

This is happen to me before, my gas stove has low flame problem. I called service center to repair the gas stove. When the repair man worked, I watch him clean the stove and pay attention to a particular job that actually solved the low flame burner problem. With that and further information from the internet, I am confident I can do the repair by myself.

The Problem : The burner port or nozzle is clogged

The gas port or nozzle is not delivering gas seamlessly to the burner. The burner port is small hole located in the middle of gas burner base. The low flame problem occur when this hole has been cover by grease or something. This is blocking or clogging the gas flow to the burner. 

The Solution : Clean burner port or nozzle.

You need to clean this grease with something tin, small and strong. To do that you can use straight pin, needle or small gauge wire.

Cleaning Procedure :

Safety first. Turn off the gas flow to the stove. Make sure the gas regulator turn off or you can disconnected it off the gas tank.

Now lets work on the burner. open the cap burner and the spreader. clean the cap and spreader from grease. look for the burner port or nozzle. On standar burner you will likely see the port in the base of the burner (at the center). sometime it is difficult to see the hole because it cover with grease, so look closely it is there.

Typical Gas Burner

Use the straight pin, needle or small gauge wire. Put it into the the port or nozzle. Push around gently until the port loosen and free of blocking material or grease. Caution. Do not overdone it. Clean the clogged port only to remove things that block the gas flow. Do not try to enlarge or distort the port or nozzle because this will lead to unstable flame. The size of burner port is vary so you better use the smallest straight pin, needle or small gauge wire to fit all the port size.


Put everything back in. Fit the spreader and cap burner properly at it place. Burner cap and spreader should also fit flush with burner base and have very little side to side movement.
Reinstall Burner Cap Correctly

When everything set in place. Turn on or connect the gas regulator again. Turn the ignition on. The flame should now bigger and burn better then before. 

That it . Done

Attention / Caution :
  • Do not use a wooden stuff like tooth pick and such because it can break off and felt into the port or nozzle (difficult to remove) and prevent gas flow properly.
  • Do not clean the port or nozzle using detergen. Detergen can clog the gas port.
  • Again, Do not overdone it. Clean the clogged port only to remove things that block the gas flow. Do not try to enlarge or distort the port or nozzle because this will lead to unstable flame
  • Always clean the burner cap after a spill over and routinely clean the burner caps. A clean burner cap will help avoid poor ignition and uneven flame.

Most of the time these simple (Do It Yourself - DIY) steps can solve the low flame gas problem, save the repairment fee and enhance your cooking expirience. cheers.

For video footage on how to fix gas stove burner low flame, you can watch it here :



Friday, March 31, 2017

Betawi Traditional Food and Drink

Betawi people is a group of jakarta dwelling community and its sorrounding. Betawi people is creative and imaginative in using materials found in their sorroundings such as durian flower, jengkol (dogfruit) and melinjo. Betawi dishes are usually stir fried to release the fragrance. Betawi cooking techniques are diverse with cultural acculturation of culture such as Chinese, India, Arabic and European.

The following are Famous Betawi Culinary :


Ketupat Sayur

1. Ketupat Sayur
Ketupat sayur is a delicious dish, we usually have it for breakfast. Everyone in our house love it. Ketupat sayur is a rice cake dish or lontong served with lodeh soup. Lodeh itself is a dish made from long bean, pumpkin or young papaya sliced thin with coconut oil cooked in seasoning of hazelnut,turmeric, onion, garlic and pieces of ebi (dried shrimp). All the ingredient is affordable and easy to find in the market. 

You can find the ketupat sayur sold by street vendor in the morning or during lebaran festive (idul fitri and idul adha). In the house of betawi family, people usually eat ketupat sayur together with boiled egg and fried tofu covered by fried onion on top. 

The ketupat sayur dish is light, hot  and spicy. the smell indulge your sense and increase your appetite. 

Kerak Telor

2. Kerak Telor
Kerak telor is one of betawi people’s favorite snack and it is widely popular. This snack is an authentic Batavian food made from omelet of chicken or duck egg with sticky rice and seasoned with shredded fried coconut, ebi and fried shallots.

The use of shredded fried coconut is a main signature of kerak telor. The kerak telor taste delicious and has distinguish burn smell and flavor of ebi (dried shrimp).

Today, less and less vendor sell kerak telor, they do sell it at Jakarta Fair event and certain spot around the tourist area like fatahillah museum and monas (nasional museum).

3. Bir Pletok
Bir pletok is traditional betawi people’s drink. It made from mixes of herbs like ginger, pandan leaves, and lemongrass.bir pletok is suit for drinking in rainy season where it’s cold. The drink help your body to stay warm. Furthermore, the drink has other advantage like it can smoothing your blood circulation.

Sayur babanci dan Sate Lembut

4. Sayur Babanci
Sayur babanci is one of iconic betawi dish that started to disappear nowadays. This is due to the difficulty to gather the ingredients. The dish required 21 ingredients.  The meat used in the dish comes from the cow’s head especially the cheek. To make the dish, special skill and extra patience is needed. 
The name “Babanci” come from the difficulty to clearly identify this dish. The dish can not event classified as vegetable soup as there is no vegetable used in the dish.
Nowadays, betawi people serve the dish only at religious festivals as family menu such as breaking the fast, eid al-fitr and eid al-adha.   

5. Gabus Pucung
Gabus pucung is a dish of snakehead fish, doused with thick dark soup from pucung fruit. Pucung is a betawi language for kluwek/keluak (football fruit), an ingredient commonly used as rawon seasoning. But despite the similarity of using kluwak, gabus pucung is thicker than rawon dish. Pucung presents a mixture of salty, sour, sweet and savory tastes.

6. Sate Lembut
For a moment, sate lembut look like sate lilit from bali. Actually sate lembut is a rare satay recipe of betawi people. The satay is made from ground beef mixed with grated coconut and spices, wrapped around flat shaped skewers. The satay taste sweet and savory, then mixed with peanut sauces makes it more delicious. This satay usually served with laksa betawi.

Source : Betawi Culture, Jakarta City – Government Tourism and Culture Office.


Thursday, March 9, 2017

Indonesian Style Rujak

Rujak in general is a traditional dish made of mix fruits and vegetables and then served cover by special seasoning. In Indonesia, you can find rujak almost everywhere from restaurants to street food vendors. In another country like malaysia and singapore they call it “rojak”. There are many version of rujak here in Indonesia, such as :

1. Rujak cingur
Rujak cingur is a traditional dish from surabaya, east java. The word “cingur” means mouth, it refer to a cow mouth. That is they mix part of a cook cow mouth into rujak cingur. They mix “cingur” with slices of fresh fruits, vegetable and rice cake then served it covered by special condiment made of chilli, peanut and brown sugar. The taste is fresh and meaty.

Rujak Cingur

2. Fuit Rujak
Fruit rujak made of various sweet and sour fruit like young papaya, kedondong, young mango, rose apple, bengkuang, pineapple mix with hotsweet seasoning made of chilli, peanut and brown sugar. The fruit rujak is so fresh (sometimes they served it cold) you can enjoyed it best in hot weather.

3. Rujal bebeg
The name of rujak bebeg refer to the making process of the rujak. That is you mix all the fruit, slice it tin, and then process it by mashing all the fruit until they all mix and soften. They mix and mash the fruit using lesung (deep bowl) made of wood. The rujak bebeg usually served using banana leaf that made the flavour even better. But today more and more food vendor use plastic as it is more practical and durable compare to banana leaf.

4. Rujak serut
Rujak serut is made of tin shaved fruit and then served it covered by peanut hot and sour sauce. The selection of fruits are vary according to the season or fruit availability.

5. Rujak juhi
Rujak juhi is a traditional culanary of betawi tribe. They call it “juhi” because they made rujak by using fermented and dried squid then mixed with noodle, cucumber and other vegetable. Rujak juhi is almost look like gado – gado. 

6. Rujak petis
Rujak petis is a traditional culinary from east java. Rujak petis is made of slice of cucumber, bengkoang, young mango, kedondong, tofu, beansprout and kale. We mix them together then served it with seasoning made of shrimp “petis”, chilli, fried peanuts, salt, sugar, young banana and water.

7. Rujak soto
Rujak soto is a traditional dish from banyuwangi, east java. This rujak is a unique combination of rujak cingur and soto babat. Rujak prepared as usual with pieces of fruit and vegetable and then served  it covered by peanut butter dressing and sauce from soto babat. This combination enchance flavour and create unique culinary experience. Rujak soto is a must try for a visitor coming for vacation or seeking culinary adventure in banyuwangi.

Sunday, March 5, 2017

Term of Service - Mycuriositynote.blogspot.com


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Breaches of these terms and conditions

Without prejudice other rights under these terms and condition, if you breach these terms and conditions in any way, may take such action as deems appropriate to deal with the breach, including suspending your acces to the website, prohibiting you from accessing the website, blocking computer using your IP address, contacting your internet service provider to request that they block your access to the website and/or bringing court proceedings against you.

Variation

May revise these terms and condition from time to time. Revised terms and conditions will apply to the use of this website from the date of the publication of the revised terms and conditions on this website. Please check this page regularly to ensure you are familiar with the current version.

Entire  Agreement

These terms and conditions, together with privacy policy’s constitute the entire agreement between you and in relation to your use of this website, and supersede all previous agreements in respect of your use of this website.

Law and jurisdiction

These terms and conditions will be governed by and construed in accordance with the laws of and any disputes relating to these terms and conditons will be subject to the exclusive jurisdiction of the courts of Jakarta – Indonesia.