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.
|Published (Last):||12 July 2014|
|PDF File Size:||9.42 Mb|
|ePub File Size:||14.91 Mb|
|Price:||Free* [*Free Regsitration Required]|
Threatened both in Ireland and Europe by diffuse pollution and the resultant periodic de-oxygenation of waters.
Archived from the original on Shell very variable, usually greenish yellow, brown or black, very solid, often twice as heavy as A. List of all species.
Reproductive cycle and strategy of Anodonta anatina (L., 1758): notes on hermaphroditism.
The zebra mussel impacts duck mussels indirectly, by settling on their shells which often provide the only hard substrate in many waterways. Hermaphroditic animals may occasionally occur.
Unionidae The duck mussel is a large bivalve mollusc which lives in lakes and slow-flowing rivers where the bottom sediments are coarse. The parasitic larvae are called glochidia and are produced in spring and carried by the current until they contact a bottom-living fish.
The dorsal upper margin is usually nearly parallel to the ventral lower margin giving the shell an oblong amodonta, rather than being angular. Anatuna were present throughout the reproductive cycle.
In brief A large bivalve shell found on sandy or gravelly bottoms of lakes and in anodotna rivers Threatened both in Ireland and Europe by diffuse pollution and the resultant periodic de-oxygenation of waters A more acute or short-term threat has been delivered by the invasive zebra mussel which competes for dissolved oxygen and food Red listed in Ireland as Vulnerable VU and as a Priority Species in Northern Ireland Species description A large anodojta shell with a flattened profile and broad, somewhat wedge-shaped appearance.
Embryonal shell smoother than in A. A more acute or short-term threat has been delivered by the invasive zebra mussel which competes for dissolved oxygen and food.
WoRMS – World Register of Marine Species – Anodonta anatina (Linnaeus, )
An annotated list of the land and freshwater Mollusca of Northern Ireland. The story may not end there, however, as the zebra mussel infestation is now waning and there is hope that the duck mussel can regain some of the territory lost to its competitor.
Similar species See Species Description 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. The native distribution of this species is European-Siberian. This is larger at up to mm long but with a less distinctly angular shape and more produced posterior end.
Views Read Edit View history. Animals in warm and eutrophic waters live only up to 5 years, in cool and oligothrophic smaller running waters up to 15 years. 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.
Anodonta (Anodonta) anatina : Duck Mussel | NBN Atlas
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: Anodonta anatina Linnaeus Home Introduction Selection Criteria:: From Wikipedia, the free encyclopedia. Gametogenesis was continuous in both sexes and germinal epithelium in early stages of development.
Larvae brooding occurred between September and March and main glochidia discharge occurred over a short period weeks in March.
The only other large mussel found in still or nearly still waters is the swan mussel Anodonta cygnea. In this study the reproductive and gametogenic cycle of Anodonta anatina were studied during 2 years in one population as well as the sex ratio and anodlnta in six distinct populations, using standard histology.
Anodonta piscinalis Nilsson, Retrieved 1 July Breeding depends upon the presence of reasonable water quality and of fish. Duck mussel A live individual of the duck mussel, Anodonta anatina Conservation status.
Putting a valve of each anodontq up to strong light separates the two. Eutrophic conditions are better tolerated than by Unio pictorum, but less than by Anodonta cygnea.
Support environmental schemes aimed at reducing diffuse pollution whether from agricultural sources, from inadequate qnodonta treatment in towns or from the malfunctioning or failure of septic tanks in rural areas. It can reach 80 mm in length and has a nearly straight dorsal upper or hinge margin which is usually at an acute angle to the ventral lower margin. This page was last edited on 3 Aprilat Previous studies described A. Why is this species a priority in Ajodonta Ireland?
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.
Calm rivers, river bays, lakes, creeks, in muddy or sandy substrate, usually m deep, not below 20 m, tolerates slightly faster water currents than A. For the sex-ratio and hermaphroditism assessments a variable number of individuals were collected from several populations from lakes and rivers. The duck mussel is a large bivalve mollusc which lives in lakes and slow-flowing rivers where the bottom sediments are coarse.
In other projects Wikimedia Commons. Local forms are increasingly threatened by uniform forms introduced with gamefish Falkner After a period of some weeks the glochidia metamorphose and drop off to begin an independent life on the bottom. Host fishes are among others Perca fluviatilis, Gobio gobio and various local species, in N Germany Salmo trutta, Gasterosteus aculeatus and Leuciscus leuciscus.
The duck mussel Anodonta anatina is a species of freshwater musselan aquatic bivalve mollusk in the family Unionidaethe river mussels.