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In 2004, a fish ladder was built for the brood fish to bypass the Itaipu Dam on the Parana River, and for juvenile fish to pass down the river. The maximum flow velocity was less than 3 m/s. At the initial stage, the flow discharge used for trapping fish was 20 m 3 /s, and when the fish were swimming into the passage channel, the flow discharge ...
Willughby, and later Ray, produced a system within De Historia Piscium which would allow for the definition, classification, and identification of fish using external features. [ 2 ] One of the main features of the book was its extensive illustrations, financed by subscriptions to the Society, but still a huge cost.
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Koi (鯉, Japanese:, literally "carp"), or more specifically nishikigoi (錦鯉, Japanese: [ɲiɕi̥kiꜜɡoi], literally "brocaded carp"), are colored varieties of carp (Cyprinus sp.) that are kept for decorative purposes in outdoor koi ponds or water gardens. Koi is an informal name for the colored variants of carp kept for ornamental purposes.
Hydraulics is a branch of science and mechanical engineering concerned with the use of fluids to perform mechanical tasks. Subcategories This category has the following 10 subcategories, out of 10 total.
The history of fluid mechanics is a fundamental strand of the history of physics and engineering. The study of the movement of fluids (liquids and gases) and the forces that act upon them dates back to pre-history.
Enjoy a classic game of Hearts and watch out for the Queen of Spades!
Cyprinus rubrofuscus, the Amur carp, is a species of cyprinid fish, and is the wild form of the well-known koi.It is widespread in the fresh waters of eastern Asia, native to China, Korea, Russia, Vietnam and Laos from the Amur to Red River basins, and has also been introduced outside its native range. [1]