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'Filter feeders' (also known as 'suspension feeders') are animals that feed by straining suspended matter and food particles from water, typically by passing the water over a specialized structure, such as the baleen of baleen whales.
Filter feeding is one of the four major types of feeding. Some animals that use this method of feeding are clams, krill, flamingos, sponges and whale sharks.
The Antarctic krill manages to directly utilize the minute phytoplankton cells, which no other higher animal of krill size can do. This is accomplished through filter feeding, using the krill's developed front legs, providing for a very efficient filtering apparatus:[1] the six thoracopods form a very effective "feeding basket" used to collect phytoplankton from the open water. In the movie linked to the right, the krill is hovering at a 55° angle on the spot. In lower food concentrations, the feeding basket is pushed through the water for over half a meter in an opened position, and then the algae are combed to the mouth opening with special setae on the inner side of the thoracopods.
''Click on the images for higher resolutions.''
==Filter feeding in Moon Jelly==
''Click on the images for higher resolutions.''
These 3 cm long animals live close to shore and hover above the sea floor, constantly collecting particles. They are an important food source for herring, cod, flounder, striped bass. In polluted areas they have in their tissue extremely high toxin levels, they are very robust and take a lot of poison before they die. Such filter feeding organisms are the reason that much of the materials we throw in the oceans comes back to us in our food.
The Blue Whale, and example of Baleen whales, feeds by lunging forward at groups of krill, taking the animals and a large quantity of water into the mouth at once. The water is then squeezed out through the baleen plates by pressing the ventral pouch and tongue up against the water. Once the mouth is clear of water, the remaining krill, unable to pass through the plates, are swallowed.
★ Particle
Contrast with:
★ Deposit feeders
★ Fluid feeders
★ Food-mass feeders
1. Kils, U.: ''. In ''Berichte zur Polarforschung'', Alfred Wegener Institute for Polar and Marine Research, Special Issue 4 (1983): "On the biology of Krill ''Euphausia superba''", Proceedings of the Seminar and Report of Krill Ecology Group, Editor S. B. Schnack, 130-155 and title page image.
★ Filter feeder of krill
Filter feeding is one of the four major types of feeding. Some animals that use this method of feeding are clams, krill, flamingos, sponges and whale sharks.
| Contents |
| Filter feeding in krill |
| Details of the feeding basket |
| Filter feeding in mysids |
| Filter feeding in whales |
| See also |
| References |
| External links |
Filter feeding in krill
Krill feeding under high phytoplankton concentration. A (slowed down by a factor of 12; 490kB) is also available.
The Antarctic krill manages to directly utilize the minute phytoplankton cells, which no other higher animal of krill size can do. This is accomplished through filter feeding, using the krill's developed front legs, providing for a very efficient filtering apparatus:[1] the six thoracopods form a very effective "feeding basket" used to collect phytoplankton from the open water. In the movie linked to the right, the krill is hovering at a 55° angle on the spot. In lower food concentrations, the feeding basket is pushed through the water for over half a meter in an opened position, and then the algae are combed to the mouth opening with special setae on the inner side of the thoracopods.
Details of the feeding basket
''Click on the images for higher resolutions.''
==Filter feeding in Moon Jelly==
''Click on the images for higher resolutions.''
Filter feeding in mysids
Filter basket of a mysid.
These 3 cm long animals live close to shore and hover above the sea floor, constantly collecting particles. They are an important food source for herring, cod, flounder, striped bass. In polluted areas they have in their tissue extremely high toxin levels, they are very robust and take a lot of poison before they die. Such filter feeding organisms are the reason that much of the materials we throw in the oceans comes back to us in our food.
Filter feeding in whales
The Blue Whale, and example of Baleen whales, feeds by lunging forward at groups of krill, taking the animals and a large quantity of water into the mouth at once. The water is then squeezed out through the baleen plates by pressing the ventral pouch and tongue up against the water. Once the mouth is clear of water, the remaining krill, unable to pass through the plates, are swallowed.
See also
★ Particle
Contrast with:
★ Deposit feeders
★ Fluid feeders
★ Food-mass feeders
References
1. Kils, U.: ''. In ''Berichte zur Polarforschung'', Alfred Wegener Institute for Polar and Marine Research, Special Issue 4 (1983): "On the biology of Krill ''Euphausia superba''", Proceedings of the Seminar and Report of Krill Ecology Group, Editor S. B. Schnack, 130-155 and title page image.
External links
★ Filter feeder of krill
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