{"id":14759,"date":"2019-02-24T21:44:54","date_gmt":"2019-02-24T19:44:54","guid":{"rendered":"http:\/\/fishconsult.org\/?p=14759"},"modified":"2020-02-07T22:43:10","modified_gmt":"2020-02-07T20:43:10","slug":"reproduction-and-grow-out-of-sea-cucumber-in-south-korea-video","status":"publish","type":"post","link":"https:\/\/fishconsult.org\/?p=14759","title":{"rendered":"Reproduction and grow-out of sea cucumber in South Korea (Video)"},"content":{"rendered":"\n

Video credit: Hisham El Gazzar (Egypt) – Description: Abdel Rahman El Gamal (Founder of the website) <\/p>\n\n\n\n

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The inserted video was filmed in a sea cucumber hatchery in South Korea. The leading farmed species is (Apostichopus japonicus<\/em>) known as Dolgi Haesam. Also, the orange-footed sea cucumber\u00a0(Cucumaria frondosa<\/em>) has been tried. The hatchery-produced seed are either released in natural waters in stock enhancement programs or grown in farming facilities.<\/p>\n\n\n\n

Typically, the broodstock are\ncollected from the wild about 60 days before the spawning season and then placed\ninto conditioning tanks at ambient seawater temperatures and then increasing\nwater temperature by one degree \u00b0C\/day until reaching 15-18 \u00b0C, by then, animals\nare ready to spawn. During that period, sea cucumber potential spawners are fed\na commercial diet which mainly consists of powdered algae such as Spirulina\nspp. or Dunaliela spp. Feeding stops a day before the spawning that is induced\nby a thermal shock through an immediate exposure of the animals to warmer water\nof about 3 to 5\u00b0C higher.<\/p>\n\n\n\n

Once eggs are laid and fertilized, the\nfertilized eggs are scooped using nets with appropriate mesh sizes depending on\nthe species, and transferred to culture rectangular tanks with around 5 x 3\nmeters and about one-meter depth. According to published reports, the\nabove-mentioned tank holds up to a million larvae. The newly hatched larvae are\nfed a special diet of microalgae according to their age.\n\nAfter\napproximately seven to eight days, the free-swimming larvae are close to the\nsettlement stage and hence settling plates made from clear corrugated PVC\nsheets are placed in the larvae rearing tanks. Upon settlement, different feed\nis provided to the new juveniles consisting of a mixture of mud or bentonite,\nyeast, and powdered algae. The sea cucumber juveniles are grown on the settling\nplates for about a year before transferring them to either the wild in stock\nenhancement programs or to sea cages for grow-out.\n\n\n\n<\/p>\n\n\n\n

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