larvacean การใช้

• Dominguez and Jefferies have argued, based on larvacean.
• Discarded larvacean houses account for a significant fraction of organic material descending to the ocean depths.
• Larvaceans spin a'web'of mucus that they use to filter food out of sea water.
• The high efficiency of this method allows larvaceans to feed on much smaller nanoplankton than most other filter feeders.
• Larvaceans are small, ocean dwelling creatures approximately four inches ( ten centimeters ) in length that resemble tadpoles.
• The 70 species of larvaceans superficially resemble the tadpole larvae of amphibians, although the tail is at right angles to the body.
• In the water column, organisms such as squid, krill, jellyfish, siphonophores, and larvaceans have been observed during installation and maintenance work.
• Larvaceans are known to engage in Vertical Migration, whereby they swim to depths as great as 2, 500 feet durring the day and return to the surface at night.
• They feed on detritus, including the remains of gelatinous zooplankton ( such as salps, larvaceans, and medusae jellies ) and complete copepods, ostracods, amphipods, and isopods.
• ""'Bathochordaeus charon " "'is a species of giant larvacean, a solitary, free-swimming tunicate that filter feeds in surface waters.
• The creature, known as a larvacean, had spun a giant fan of fragile mucus above itself that acted as a filter to let only the finer bits of marine snow into its domain.
• Robison said the larvacean would abandon its filter when it became clogged with too much debris, and, if the animal was disturbed, it could also drop the gossamer inner house to flit away and start life anew.
• In adulthood its diet is no longer restricted to " Zanclea ", although observations of feeding behaviour are sparse . " Phylliroe " has been seen approaching a swarm of the larvacean " Oikopleura albicans " from below, grabbing a specimen with its paired denticulate jaws and swallowing it in half a minute.
• Some question the relation to tunicates and larvaceans, as there is no evidence of segmentation in tunicates, larval or adult, that is comparable to segmentation in vetulicolians, that the anus of urochordates is within the atrium, while that of vetulicolians is positioned at the terminal end of the tail, and, perhaps most importantly, there is no exhalant siphon, or analogous structure, seen in vetulicolians.