American slippery slug

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Slippery slug
Slippery slipper (Crepidula fornicata)

Slippery slipper ( Crepidula fornicata )

Systematics
Subordination : Hypsogastropoda
Partial order : Littorinimorpha
Superfamily : Calyptraeoidea
Family : Calyptraeidae
Genre : Crepidula
Type : Slippery slug
Scientific name
Crepidula fornicata
( Linnaeus , 1758)
Ecomare - muiltje (pcd05035-muiltje-sd) .jpg
Ecomare - muiltje (pcd04057-muiltje-sd) .jpg

The slipper limpet ( Crepidula fornicata ) is a marine snail species from the family of calyptraeidae .

distribution and habitat

The original home of the slipper snail are the Atlantic coasts of the USA , Mexico and Canada , as well as the Pacific coast of the USA and Mexico and the Gulf of Mexico .

This snail was introduced into Europe in 1870 together with oysters that were intended for cultural purposes. Now it can be found from southern Norway to Spain , and small stocks can also be found in the Mediterranean . It has been proven in Germany since 1934. The slipper snail has also been introduced in other parts of the world, for example in Japan.

nutrition

The slipper snail feeds on plankton , which it filters out of the surrounding water. For this purpose it forms a kind of web of slime threads, which it spreads around itself and in which the plankton is then caught. If the "net" is full, the slime web is brought in and eaten "completely", including the captured plankton.

Multiplication

Slippers change sex in the course of their life, so they are hermaphrodites . It is a proteroandric hermaphroditism : first males emerge, then female sexual systems are formed. After hatching, the larvae live as plankton for two to four weeks before they settle on the ocean floor. At this age, all animals are males and to some extent mobile. Only later do they transform into females and settle down.

literature

  • D. Thieltges: Successful immigrant from overseas - The American slipper snail Crepidula fornicata (L.) in the Wadden Sea . In: Nature and Museum . tape 133 , no. 4 , p. 110–114 ( PDF 876kB [accessed August 20, 2012]).

Individual evidence

  1. ↑ D. Thieltges:  Successful immigrant from overseas - The American slipper snail Crepidula fornicata (L.) in the Wadden Sea . In:  Nature and Museum . 133, No. 4, pp. 110-114. http://epic.awi.de/6015/1/Thi2003a.pdf
  2. ^ Fisheries Global Information System of FAO FAO Fisheries & Aquaculture - Introduction of species fact sheets placeholder
  3. ↑ Thomas M. Smith, Robert L. Smith: Ecology. Pearson Education 2009. ISBN 3827373131

Web links

Commons : Slippery slug ( Crepidula fornicata )  - Collection of images, videos and audio files