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Because fish feeders generally cannot feed frozen or live food, they are not effective options for feeding most predatory fish. [ 9 ] [ 10 ] Similarly, most (though not all), designs of feeder only allow for one type of food at a time, (flaked or granular), therefor fish communities requiring both floating and sinking foodstuffs are not well ...
Though suction feeding can be seen across fish species, those with more cranial kinesis show an increase in suction potential as a result of more complex skull linkages that allow greater expansion of the buccal cavity and thereby create a greater negative pressure. Most commonly, this is achieved by increasing the lateral expansion of the skull.
Rakers are widely varied in number, spacing, and form. By preventing food particles from exiting the spaces between the gill arches, they enable the retention of food particles in filter feeders. [1] The structure and spacing of gill rakers in fish determines the size of food particles trapped, and correlates with feeding behavior.
Solid wastes which accumulate at the raceway bottom can be removed by pumps. [19] Oxygen levels in the water can be kept high if the raceway units are placed one after the other with intermediate drops over weirs, or by the use of aeration systems such as pumps, blowers and agitators. [17] [19] Generally the water should be replaced about every ...
Unlike the other large filter feeders, it relies only on the water that is pushed through the gills by swimming; the megamouth shark and whale shark can suck or pump water through their gills. [6] Manta rays can time their arrival at the spawning of large shoals of fish and feed on the free-floating eggs and sperm. This stratagem is also ...
A biotope aquarium is an aquarium that is designed to simulate a natural habitat, with the fish, plants, and furnishings all representative of a particular place in nature. [5] Because only species that are found together in nature are allowed in a true biotope aquarium, these tanks are more challenging and less common than the other themes.
A sump can also improve aeration of the water in the aquarium. Water movement between the sump and the display tank helps with gas exchange between the water and air. Increased dissolved oxygen is beneficial to fish and can also aid in avoiding Cyanobacteria outbreaks. [3]
Some fish have evolved to exploit the mouthbrooding behaviour of other species. Synodontis multipunctatus , also known as the cuckoo catfish, combines mouthbrooding with the behavior of a brood parasite : it eats the host mouthbrooder's eggs, while spawning and simultaneously laying and fertilizing its own eggs.
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