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DISCOVERY Arapaima Gigas fish in the Brantas River, Sidoarjo, Surabaya, an abominable number of adults in the village of Mliriprowo, in the district of Tarik, Sidoarjo, Monday (25/06/2018).
As a result, the subject of discovery was discussed in the media and cyberspace. Therefore, the fish belongs to the category of predators of freshwater fish that are harmful to the native aquatic fauna of Indonesia.
Two Ilytiologi researchers from the LIPI Biology Research Center namely Dr. Renny Kurnia Hadiaty and Dr. Haryono suggest some things related to the discovery of Arapaima Gigas fish and also if it is encountered again.
"The regulation on the entry of Arapaima Gigas fish into Indonesian waters was implemented by the Minister of Maritime Affairs and Fisheries in 2014. Should be socialized immediately the authors, contractors and guardians sanctioned ornamental fish for violators of the law "says Renny.
Haryono connect, the public on the front when it is similar fish again in public waters to be stopped immediately. "The fish are immediately removed from the water, the meat can be used by the surrounding community because in the country of origin, even this fish meat can be consumed."
Then, the two LIPI researchers also explained the subtleties of this fish Arapaima Gigas. Arapaima Gigas fish is a type of freshwater fish that has a unique shape. This makes everyone interested in the type of fish that one. But the fish of Arapaima Gigas turned out to be quite dangerous. Especially for native fish in Indonesia because it is carnivorous / predatory, the food is in the form of other types of fish, crustaceans, frogs, birds found around the surface of the waters.
The existence of Arapaima Gigas if she entered the Indonesian public waters would be very dangerous for the native aquatic fauna of Indonesia. The fish can be a competitor for the native fish in the use of food and space, when the size is the same as the original fish. But since the size can reach 3-4 meters weighing hundreds of kilograms, of course, can pbad the original aquatic fauna in all waters.
The survival of Arapaima Gigas fish in public waters is excellent, although the water conditions are not good because these fish can take oxygen directly from the air. Gill structures only work when they are still juvenile (teenagers).
Along with fish growth, the gill undergoes a primitive lung transition that allows the fish to adapt in a poor environment and even low levels of oxygen.
Another thing is the parent Arapaima Gigas has a culture model, men and women work together to create a hole with a width of about 50 cm and a depth of 20 cm. Females will lay eggs that can reach 50,000 eggs in the hole. Then the males fertilize the eggs and the eggs are also well preserved by the male.
In addition, the color of the fish's head darkens to protect its newly hatched junvenil. After the kids are big enough, the colorful spawners come back brighter and swim away from them.
In his home country, Brazil, the fish of Arapaima Gigas has been overfished. Thus, the Brazilian government has banned arrest since 2001, but illegal fishing continues unexpectedly as the population declines. According to the World Conservation Monitoring Center, these fish have been included in the 1996 IUCN Red List of Threatened Species, although IUCN has not established it. because of the lack of detailed population data.
Arapaima Gigas was also listed in the International Convention on Endangered Wildlife (CITES) and is listed in Appendix II, which means that fish of this species is not yet off.
Arapaima Gigas is named for pirarucu by local people along the Amazon River which means goldfish. This denomination is based on the reddish sheen of the scales at the tail and also the reddish-orange color of the meat fillet.
The fish is a freshwater fish endemic to the Amazon River described by a doctor and Swiss naturalist, Prof. Dr. Heinrich Rudolf Schinz. This fish was published in 1822. Arapaima Gigas fish originates from the Amazon Basin (DAS) of Brazil. In addition, these fish are also present in other countries along other water courses of the Amazon, namely Colombia, Ecuador, Guyana and the United States. Peru. (*)
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