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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Duck mussel

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.

Show history of this page. This page was last edited on 3 Aodontaat Anodotna parasitic larvae are called glochidia and are produced in spring and carried by the current until they contact a bottom-living fish.

A large bivalve shell found on sandy or gravelly bottoms of lakes and in slow-moving rivers.

These animals are responsible for important ecosystem services such as recycling nutrients and improving water clarity. Support environmental schemes aimed at reducing diffuse pollution whether from agricultural sources, from inadequate sewage treatment in towns or from the malfunctioning or failure of septic tanks in rural areas.

This is larger at up to mm long but with a less distinctly angular shape and more produced posterior end. 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.

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Gametes were present throughout the reproductive cycle. Click on map to open large map in new window. Breeding depends upon the presence of reasonable water quality and of fish. Threatened both in Ireland and Europe by diffuse pollution and the resultant periodic de-oxygenation of waters.

The duck mussel is a large bivalve mollusc which lives in lakes and slow-flowing rivers where the bottom sediments are coarse. 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.

Why is this species a priority in Northern Ireland? Pictures of Anodonta anatina.

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. Nomenclator Zoologicus Neave updated, genera. Life cycle Adults are long lived and there is nearly always a good proportion of mature shells present in colonies. Putting a valve of each species up to strong light separates the two. Previous studies described A.

AnimalBase :: Anodonta anatina species homepage

It also has a shallower, more flattened shell anaina the interior less deeply coated with nacre. 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 hermaphroditism in six distinct populations, using standard histology.

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Anodonta piscinalis Nilsson, International Union for Conservation of Nature.

Down, BT18 0EU; cedar. Retrieved from ” https: Gametogenesis was continuous in both sexes and germinal epithelium in early stages of development. Duck mussel A live individual of the duck mussel, Anodonta anatina Conservation status. 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.

Aanatina the sex-ratio and hermaphroditism assessments a variable number of individuals were collected from several populations from lakes and rivers. In brief A large bivalve shell found on sandy or gravelly bottoms of lakes and in slow-moving 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 amodonta 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 bivalve shell with a flattened profile and broad, somewhat wedge-shaped appearance.

Archived copy as title Articles with ‘species’ microformats. Freshwater mussels have decreased dramatically in Iberia over the last decades. However, the present study indicates that A.