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  2. Aquaculture - Wikipedia

    en.wikipedia.org/wiki/Aquaculture

    In 1995, salmon had a FIFO ratio of 7.5 (meaning 7.5 kilograms of wild fish feed were required to produce one kilogram of salmon); by 2006 the ratio had fallen to 4.9. [103] Additionally, a growing share of fish oil and fishmeal come from residues (byproducts of fish processing), rather than dedicated whole fish. [ 104 ]

  3. Plunge dip - Wikipedia

    en.wikipedia.org/wiki/Plunge_dip

    Typically a dip is designed as a narrow channel (about the width of the animal) through which the animals walk, immersing them in progressively deeper liquid until the animal is completely immersed (apart from its head so it can breathe). The channel then becomes progressively shallower until the animal exits.

  4. Saint John Ponds - Wikipedia

    en.wikipedia.org/wiki/Saint_John_Ponds

    The Saint John Ponds are a chain of shallow lakes at the headwaters of the Baker Branch Saint John River in the North Maine Woods.The flow sequence is from the Upper First Saint John Pond, through the Lower First Saint John Pond, Second Saint John Pond, Third Saint John Pond, and Fourth Saint John Pond to the Fifth Saint John Pond.

  5. Drinking bird - Wikipedia

    en.wikipedia.org/wiki/Drinking_bird

    Drinking birds, also known as dunking birds, drinky birds, water birds, or dipping birds [1] [2] [3] are toy heat engines that mimic the motions of a bird drinking from a water source. They are sometimes incorrectly considered examples of a perpetual motion device.

  6. Stepwell - Wikipedia

    en.wikipedia.org/wiki/Stepwell

    Shravanabelagola stepped pond, Karnataka. Stepped ponds are very similar to stepwells in terms of purpose. Generally, stepped ponds accompany nearby temples while stepwells are more isolated. [8] Stepwells are dark and barely visible from the surface, while stepped ponds are illuminated by the light from the sun.

  7. Solar pond - Wikipedia

    en.wikipedia.org/wiki/Solar_pond

    A solar pond is a pool of saltwater which collects and stores solar thermal energy. The saltwater naturally forms a vertical salinity gradient also known as a " halocline ", in which low-salinity water floats on top of high-salinity water.

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