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Filters have different jobs, including making sure there is algae to feed the oyster larvae and cleaning the water to maintain a suitable environment for their growth. In addition to the nursery tank system, small boats and rafts made in Italy are used to gather oysters that cannot be reached by bare foot.
Under ideal laboratory conditions, an oyster can filter up to 190 L (50 US gal) of water per day. Under average conditions, mature oysters filter 11–45 L (3–12 U.S. gal). Chesapeake Bay 's once-flourishing oyster population historically filtered excess nutrients from the estuary's entire water volume every three to four days.
The optimal vertical range for C. rhizophorae is between 1.0 m and 1.5 m above the 0.0 m level of spring tides. [4] At greater depths, the substrate is too soft for the oysters to settle and the pressure from predators like crabs and fish is too extreme. [5] [4] Above 1.5 m, C. rhizophorae will not settle due to extensive exposure time. [4]
Fisheries Resources Surveillance Squadron No.1: based in Hai Phong [4] Fisheries Resources Surveillance Squadron No.2: managed from Da Nang to Ninh Thuận Province; based in Rớ Islet, Khánh Hòa Province. There are three posts: one based in Da Nang on the mainland and two based in Spratly Islands (West Reef and Southwest Cay) [4]
The Ministry of Natural Resources and Environment (MONRE, Vietnamese: Bộ Tài nguyên và Môi trường) is a government ministry in Vietnam responsible for: land, water resources; mineral resources, geology; environment; hydrometeorology; climate change; surveying and mapping; management of the islands and the sea.
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Uchu Sentai Kyuranger (宇宙戦隊キュウレンジャー, Uchū Sentai Kyūrenjā) is a Japanese tokusatsu series that serves as the 41st installment in the Super Sentai franchise and the 29th entry in the Heisei era.
The Vietnamese Wikipedia initially went online in November 2002, with a front page and an article about the Internet Society.The project received little attention and did not begin to receive significant contributions until it was "restarted" in October 2003 [3] and the newer, Unicode-capable MediaWiki software was installed soon after.