ANODONTA ANATINA PDF
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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Home Introduction Selection Criteria:: Freshwater mussels have decreased dramatically in Iberia over the last decades. These animals are responsible for important ecosystem services such as recycling nutrients and improving water clarity. 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. In other projects Wikimedia Commons.
However, the present study indicates that A.
International Union for Conservation of Nature. Shell very variable, usually greenish yellow, brown or black, very solid, often snatina as heavy as A. This mussel is associated with relatively unpolluted slow rivers and lakes with sandy or gravelly bottoms, habitats which are in universal decline.
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Duck mussel Anodotna live individual of the duck mussel, Anodonta anatina Conservation status. Zebra mussels are unable to colonise streams in which water flow is significant and it is thought that these may act as reservoirs of native mussels and assist in re-colonisation of slower-flowing water-bodies.
Index Animalium Sherborn, species and genera until Gametogenesis was continuous in both sexes and germinal epithelium in early anqtina of development. Hermaphroditic animals may occasionally occur. Size and age of maturity depends on water temperatures, animals in warm waters reach maturity after 2 years, in cold waters they anodonga up to 5 years and the shells stay smaller.
Nomenclator Zoologicus Neave updated, genera. An annotated list of the land and freshwater Mollusca of Northern Ireland. Down, BT18 0EU; cedar.
Anodonta anatina duck mussel :: Northern Ireland’s Priority Species ::
Overall, this study indicates that for more efficient conservation actions and management plans, freshwater mussel reproductive biology should be studied at the population level mainly in the subfamily Anodontinae. Larvae brooding occurred between September and March and main glochidia discharge occurred over a short period weeks in March.
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. Support environmental schemes aimed at reducing diffuse pollution whether from agricultural sources, from inadequate sewage treatment in towns or from anodontq malfunctioning or failure of septic tanks in rural areas.
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 duck mussel Anodonta anatina is a species of freshwater musselan aquatic bivalve mollusk in the family Unionidaethe river mussels.
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: The duck mussel is a large bivalve mollusc which lives in lakes and slow-flowing rivers where the bottom sediments are coarse.
Conservation of this species Current action Declaration as a Priority Species. Decline in water quality in lowland lakes and rivers from diffuse pollution with attendant. 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. Check-list of the molluscs Mollusca of the Czech Republic.
A live individual of the duck mussel, Anodonta anatina.
Reproductive cycle and strategy of Anodonta anatina (L., 1758): notes on hermaphroditism.
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. It was formerly common in such places but has been displaced by excess siltation, eutrophication and, recently, by the invasive zebra mussel Dreissena polymorpha.
Life cycle Adults are long lived and there is nearly always a good proportion of mature shells present in colonies. 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.
However, this increases where recent breeding and recruitment has been poor. The shell is thin and pale, whitish or pearly inside due to a thin layer of nacre, but protected by a periostracum outside which gives it a smooth, glossy green, sometimes brown appearance marked with strong concentric growth lines.
Duck mussel – Wikipedia
In this study anodoonta reproductive and gametogenic cycle of Anodonta anatina were studied during 2 years in one population as well as the sex ratio and hermaphroditism in six distinct populations, using standard histology. Oogenesis and spermatogenesis occurred mainly between January and May. Malacologica BohemoslovacaSuppl.