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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This page was last edited on 3 Aprilat Animals in warm and eutrophic waters live only up to 5 years, in cool and oligothrophic smaller running waters up to 15 years.

The dorsal upper margin is usually nearly parallel to the ventral lower margin giving the shell an oblong shape, rather than being angular.

A live individual of the duck mussel, Anafina anatina. Anodonta piscinalis Nilsson, Eutrophic conditions are better tolerated than by Unio pictorum, but less than by Anodonta cygnea. From Wikipedia, the free encyclopedia. International Union for Conservation of Nature.

Gametes were present throughout the reproductive cycle. Anodonta anatina Linnaeus Species description A large bivalve shell with a flattened profile and broad, somewhat wedge-shaped appearance.

The duck mussel Anodonta anatina is a species of freshwater musselan aquatic bivalve mollusk in the family Unionidaethe river mussels. 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.

Duck mussel

Putting a valve of each species up to strong light separates the two. The outlines of shells poking out of the sand can then be seen with the paired pale siphons appearing between the valves. Local forms are increasingly threatened by uniform forms introduced with gamefish Falkner Wikimedia Commons has media related to Anodonta anatina. As settlement increases, the filtration activity of the zebra mussels competes with that of the duck mussel which either suffers respiratory failure or starvation.

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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. Retrieved from ” https: Larvae brooding occurred between September and March and main glochidia discharge occurred over a short period weeks in March.

Duck mussel – Wikipedia

Nomenclator Zoologicus Neave updated, genera. The parasitic larvae are called glochidia and are produced in spring and carried by the current until they contact a bottom-living fish. Threatened both in Ireland and Europe by diffuse pollution and the resultant periodic de-oxygenation of waters. 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: Oogenesis and spermatogenesis occurred mainly between January and Anovonta.

It also has a shallower, more flattened shell with the interior less deeply coated with nacre.

In other projects Wikimedia Commons. However, the present study indicates that A.

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. Show history of this page.

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After a period of some weeks the glochidia metamorphose and drop off to begin an independent life on the bottom. Diffuse pollution has affected most areas and dissolved oxygen levels are reduced in many lakes to dangerously low levels in the summer months. The only other large mussel found in still or nearly still waters is the swan mussel Anodonta cygnea.

Anodonta anatina duck mussel :: Northern Ireland’s Priority Species ::

Check-list of the molluscs Mollusca of the Czech Republic. 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.

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

Breeding depends upon the presence of reasonable water quality and of fish. Retrieved 1 July A large bivalve shell found on sandy or gravelly bottoms of lakes and in slow-moving rivers.

The native distribution of this species is European-Siberian. Down, BT18 0EU; cedar. List of all species. These animals are anatins for important ecosystem services such as recycling nutrients and improving water clarity. In Switzerland in up to m altitude, usually below m, higher than the other freshwater mussels.

On a still, sunny day look down at the lake bottom with Polaroid glasses or using a glass-bottomed box. Click on map to open large map in new window.