Corella eumyota
| Corella eumyota | ||||||||||||
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| Scientific name | ||||||||||||
| Corella eumyota | ||||||||||||
| Traustedt , 1882 |
Corella eumyota is a sessile and solitary species of sea squirts from the Corellidae family. It occurs in the Southern Ocean on the coasts of Antarctica , South America , South Australia , New Zealand and South Africa . From here it was introduced into European waters, where it was discovered off the coast of France in2002.
features
Corella eumyota is gray or ivory in color and can grow to a length of about 24 centimeters in its main area of distribution in the southern hemisphere. The coat of large individuals is thin, transparent, and papery, while smaller individuals, which are much more common, are thicker and gelatinous. This species was introduced to the northern hemisphere and is described here as about 2 to 4 inches long, semi-transparent, and white, brown, or orange in color, with the siphons often being orange.
Usually the sea squirt lies on the right side and is slightly oval, but with its body it adapts to the contours of its surroundings. The inflow opening is at the top of the body and the exhalation siphon is offset by a third on the right side. The siphons cannot be retracted. Although the tunic can be clean, it is sometimes covered by a biofilm or overgrown by other sea squirts. The hindgut is visible through the tunic and forms a simple curve that distinguishes it in European waters from the rather similar Molgula species, which have an "S" shaped bowel.
distribution
Corella eumyota is native to Antarctic waters and off the southern coasts of South America, South Africa, Australia, and New Zealand. It lives on the Antarctic continental shelf at depths between 30 and more than 840 meters. The species was introduced into the northern hemisphere and is now represented as a neozoon in northern and western Europe off Spain, France, Ireland and the south coast of England.
Way of life
Corella eumyota is a food strudel and filter feeder . It generates a stream of water to suck at this at their Einatemsiphon, in gills intestine filter out food particles and auszuleiten the water through the lateral siphon. It feeds largely on organic particles that come from the sediment. It is a slow-growing and long-lived species in Antarctic waters. It spawns in the southern summer and the larvae are kept in the body cavity until they are well advanced. When they are finally released, they settle on the ocean floor within a few minutes, causing groups of these sea squirts to grow close together.
supporting documents
- ↑ a b c d Corella eumyota Traustedt, 1882 . In: Biodiversity AQ . British Antarctic Survey. Retrieved September 22, 2017.}
- ↑ a b Mather, Patricia: Antarctic Ascidiacea: Monographic representation of known species based on specimens collected under the auspices of the US government, 1947-1965 . American Geophysical Union, 1969, ISBN 978-0-87590-113-8 , pp. 85-87.
- ↑ a b Corella eumyota . In: EOL . Retrieved September 22, 2017.}
- ↑ Bilewitch, J: A Splash of Lake: Corella eumyota . Marlin. 2009. Retrieved September 27, 2017.}
- ^ Aliya El Nagar, Rony Huys, John DD Bishop: Widespread occurrence of the Southern Hemisphere ascidian Corella eumyota Traustedt, 1882 on the Atlantic coast of Iberia. Aquatic Invasions 5 (2), 2010: pp. 169-173; doi : 10.3391 / ai.2010.5.2.06 .
- ↑ Wolf E. Arntz, Andrew Clarke: Ecological studies in the ice zone of the Antarctic Sea: Results of the EASIZ Midterm Symposium . Springer Science & Business Media, 2012, ISBN 978-3-642-59419-9 , pp. 261-262.