Species name: Anodonta anatina (Linnæus, ). Anodonta-anatina_jpg are better tolerated than by Unio pictorum, but less than by Anodonta cygnea. A more oval shell than A. cygnea, with umbos nearly central. Periostracum glossy , more often green than brown. The shell is thicker in front than behind and. Anodonta anatina (L., ) Family: Unionidae. The duck mussel is a large bivalve mollusc which lives in lakes and slow-flowing rivers where the bottom.
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Anodonta (Anodonta) anatina : Duck Mussel | NBN Atlas
Down, BT18 0EU; cedar. In other projects Wikimedia Commons. Malacologica BohemoslovacaSuppl. Home Introduction Selection Criteria:: An annotated list of the land and freshwater Mollusca anodont Northern Ireland.
How to see this species Duck mussels can sometimes be seen from fishing stands or jetties on lakeshores where the bottom is of clean sand or silt. Freshwater mussels have decreased dramatically in Iberia over the last decades. However, the present study indicates that A.
The duck mussel Anodonta anatina is a species of freshwater musselan aquatic bivalve mollusk in the family Unionidaethe river mussels. Animals in warm and eutrophic waters live only up to 5 years, in cool and oligothrophic smaller running waters up to 15 years. Previous studies described A. Wikimedia Commons has media related to Anodonta anatina. It was formerly anxtina in such places but has been displaced by excess siltation, eutrophication and, recently, by the invasive zebra mussel Dreissena polymorpha.
Index Animalium Sherborn, species and genera until Views Read Edit View history. After a period of some weeks the glochidia metamorphose and drop off to begin an independent life on the bottom.
Local forms are increasingly threatened by qnodonta forms introduced with gamefish Falkner The only other large mussel found in still or nearly still waters is the swan mussel Anodonta cygnea. A live individual of the duck mussel, Anodonta anatina. Swan mussel shells appear to be of even thickness throughout, whereas duck mussel shells are clearly uneven and much thicker and opaque towards the lower front end.
The zebra mussel impacts duck mussels indirectly, by settling on their shells which often provide the only hard substrate in many waterways. Breeding depends upon the presence of reasonable water quality and of fish. From Wikipedia, the free encyclopedia. Click on map to open large map in new window. Oogenesis and spermatogenesis occurred mainly between January and May.
WoRMS – World Register of Marine Species – Anodonta anatina (Linnaeus, )
List of all species. Decline in water quality in lowland lakes and rivers from diffuse pollution with attendant. The duck mussel is a large bivalve mollusc which lives in lakes and slow-flowing rivers where the bottom sediments are coarse. Retrieved from ” https: International Union for Conservation of Nature.
Hermaphroditic animals may occasionally occur. Although self-fertilization was not confirmed, additional studies with molecular characterization of larvae using fast evolving markers should be used in future studies to enlighten this process.
The dorsal upper margin is usually nearly parallel to the ventral lower margin giving the shell an oblong shape, rather than being angular.
A more acute or short-term threat has been delivered by the invasive zebra mussel which competes for dissolved oxygen and food. As settlement increases, the filtration activity of the zebra mussels competes with that of the duck mussel which either suffers respiratory failure or starvation.
Reproductive cycle and strategy of Anodonta anatina (L., 1758): notes on hermaphroditism.
Gametogenesis was continuous in both sexes and germinal epithelium in early stages of development. List of failure reports. Life cycle Adults are long lived and there is nearly always a good proportion of mature shells present in colonies. In Switzerland in up to m altitude, usually below m, higher than the other freshwater mussels.
Pictures of Anodonta anatina.
For the sex-ratio and hermaphroditism assessments a variable number of individuals were collected from several populations from lakes and rivers. Articles with Czech-language external links All articles with dead external links Articles with dead external links from December Articles with permanently dead external links CS1 maint: On a still, sunny day look down at the lake bottom with Polaroid aondonta or using a glass-bottomed box.
Archived copy as title Articles with ‘species’ microformats.
However, this increases where recent breeding and recruitment has been poor. Generally threatened by continuous destructions of habitats, water pollutions and agricultural fertilization. It also has a shallower, more flattened shell with the interior less deeply coated with nacre.